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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>AITP Enrolment CrossChecker | Centre for Learning and Teaching</title>
    <link rel="icon" type="image/x-icon" href="/static/favicon.ico">
    <script src="https://cdn.tailwindcss.com"></script>
    <script src="https://cdn.jsdelivr.net/npm/feather-icons/dist/feather.min.js"></script>
    <script src="https://unpkg.com/feather-icons"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.18.5/xlsx.full.min.js"></script>
    <!-- Fav Icon -->
    <link rel="icon" href="img/favicon.ico" type="image/x-icon">
    <script>
        tailwind.config = {
            theme: {
                extend: {
                    colors: {
                        primary: {
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                            900: '#701a75',
                        }
                    }
                }
            }
        }
    </script>
</head>
<body class="bg-gray-50 min-h-screen">


    <!-- Main Content -->
    <div class="max-w-4xl mx-auto py-12 px-4 sm:px-6 lg:px-8">
        <!-- Header -->
        <div class="text-center mb-12">
            <h1 class="text-4xl font-bold text-gray-900 mb-4">AITP Enrolment CrossChecker </h1>
            <p class="text-lg text-gray-600 max-w-2xl mx-auto">
                Upload your Admin & Teaching Staff Enrolment List and Teaching Staff List to analyse data matches and unique records.
            </p>
        </div>
        <!-- Upload Sections -->
        <div class="grid md:grid-cols-3 gap-8 mb-12">
<!-- File 1 Upload -->
            <div class="bg-white rounded-2xl shadow-lg p-6 border-2 border-dashed border-primary-200 hover:border-primary-400 transition-colors">
                <div class="text-center">
                    <i data-feather="file-text" class="w-12 h-12 text-primary-500 mx-auto mb-4"></i>
                    <h3 class="text-xl font-semibold text-gray-900 mb-2">File 1: Enrolment List</h3>
                    <p class="text-gray-600 mb-4">Admin and Teaching Staff Enrolment List<br>(.xlsx, .xls)</p>
                    <input type="file" id="file1" accept=".xlsx,.xls" class="hidden">
                    <label for="file1" class="cursor-pointer bg-primary-500 hover:bg-primary-600 text-white px-6 py-3 rounded-lg font-medium transition-colors inline-flex items-center">
                        <i data-feather="upload" class="w-4 h-4 mr-2"></i>
                        Upload File 1
                    </label>
                    <div id="file1-status" class="mt-3 text-sm text-gray-500"></div>
                </div>
            </div>
            <!-- File 2 Upload -->
            <div class="bg-white rounded-2xl shadow-lg p-6 border-2 border-dashed border-secondary-200 hover:border-secondary-400 transition-colors">
                <div class="text-center">
                    <i data-feather="users" class="w-12 h-12 text-secondary-500 mx-auto mb-4"></i>
                    <h3 class="text-xl font-semibold text-gray-900 mb-2">File 2: Teaching Staff List</h3>
                    <p class="text-gray-600 mb-4">Teaching and Instructing Staff List<br>(.xlsx, .xls)</p>
                    <input type="file" id="file2" accept=".xlsx,.xls" class="hidden">
                    <label for="file2" class="cursor-pointer bg-secondary-500 hover:bg-secondary-600 text-white px-6 py-3 rounded-lg font-medium transition-colors inline-flex items-center">
                        <i data-feather="upload" class="w-4 h-4 mr-2"></i>
                        Upload File 2
                    </label>
                    <div id="file2-status" class="mt-3 text-sm text-gray-500"></div>
                </div>
            </div>
            <!-- File 3 Upload -->
            <div class="bg-white rounded-2xl shadow-lg p-6 border-2 border-dashed border-green-200 hover:border-green-400 transition-colors">
                <div class="text-center">
                    <i data-feather="database" class="w-12 h-12 text-green-500 mx-auto mb-4"></i>
                    <h3 class="text-xl font-semibold text-gray-900 mb-2">File 3: Department Data</h3>
                    <p class="text-gray-600 mb-4">Department Records List<br>(.xlsx, .xls)</p>
                    <input type="file" id="file3" accept=".xlsx,.xls" class="hidden">
                    <label for="file3" class="cursor-pointer bg-green-500 hover:bg-green-600 text-white px-6 py-3 rounded-lg font-medium transition-colors inline-flex items-center">
                        <i data-feather="upload" class="w-4 h-4 mr-2"></i>
                        Upload File 3
                    </label>
                    <div id="file3-status" class="mt-3 text-sm text-gray-500"></div>
                </div>
            </div>
        </div>
        <!-- Process File 3 Button -->
        <div class="text-center mb-6">
            <button id="process-file3-btn" disabled class="bg-green-500 hover:bg-green-600 text-white px-8 py-4 rounded-xl font-semibold text-lg transition-all transform hover:scale-105 disabled:opacity-50 disabled:cursor-not-allowed disabled:transform-none">
                <i data-feather="filter" class="w-5 h-5 mr-2 inline"></i>
                Process File 3
            </button>
        </div>
        <!-- Compare and Clear Buttons -->
        <div class="text-center mb-12 space-x-4">
<button id="compare-btn" disabled class="bg-gradient-to-r from-primary-500 to-secondary-500 hover:from-primary-600 hover:to-secondary-600 text-white px-8 py-4 rounded-xl font-semibold text-lg transition-all transform hover:scale-105 disabled:opacity-50 disabled:cursor-not-allowed disabled:transform-none">
                <i data-feather="git-compare" class="w-5 h-5 mr-2 inline"></i>
                Compare Data
            </button>
            <button id="clear-btn" class="bg-gray-500 hover:bg-gray-600 text-white px-8 py-4 rounded-xl font-semibold text-lg transition-all transform hover:scale-105">
                <i data-feather="refresh-cw" class="w-5 h-5 mr-2 inline"></i>
                Clear All
            </button>
        </div>
<!-- Results Section -->
        <div id="results" class="hidden bg-white rounded-2xl shadow-lg p-8">
            <h2 class="text-2xl font-bold text-gray-900 mb-6 text-center">Comparison Results</h2>
            <!-- Data Analysis Section -->
            <div class="bg-red-50 border border-red-200 rounded-xl p-6 mb-8">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="alert-triangle" class="w-6 h-6 text-red-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-red-700">Data Analysis</h3>
                </div>
                <div class="grid md:grid-cols-3 gap-4">
                    <div class="bg-white rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-red-600 mb-1" id="file1-null-count">0</div>
                        <div class="text-sm text-red-700 font-medium">File 1 Null Values</div>
                        <div class="text-xs text-red-500 mt-1">In "m1_select_session" column</div>
                    </div>
                    <div class="bg-white rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-red-600 mb-1" id="file2-null-count">0</div>
                        <div class="text-sm text-red-700 font-medium">File 2 Null Values</div>
                        <div class="text-xs text-red-500 mt-1">In "email" column</div>
                    </div>
                    <div class="bg-white rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-red-600 mb-1" id="file2-duplicates-count">0</div>
                        <div class="text-sm text-red-700 font-medium">File 2 Duplicates</div>
                        <div class="text-xs text-red-500 mt-1">Duplicate emails</div>
                    </div>
                </div>
            </div>
<!-- Download Null Values Button -->
            <div class="text-center mb-6">
                <button id="download-null-btn" class="bg-red-500 hover:bg-red-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center">
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download Null Values Report
                </button>
            </div>
<!-- Filtered Comparison Section -->
            <div class="bg-blue-50 border border-blue-200 rounded-xl p-6 mb-8">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="filter" class="w-6 h-6 text-blue-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-blue-700">Filtered Comparison Results</h3>
                </div>
                <p class="text-center text-blue-600 text-sm mb-4">Comparing File 1 (CNA) with File 2 (Email) after removing null values</p>
                
                <div class="grid md:grid-cols-3 gap-6">
                    <div class="bg-yellow-50 border border-yellow-200 rounded-xl p-4 text-center">
                        <i data-feather="user-plus" class="w-6 h-6 text-yellow-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-yellow-600 mb-1" id="filtered-unique-file1-count">0</div>
                        <div class="text-xs text-yellow-700 font-medium">Unique to File 1 (CNA)</div>
                    </div>
                    
                    <div class="bg-primary-50 border border-primary-200 rounded-xl p-4 text-center">
                        <i data-feather="user-check" class="w-6 h-6 text-primary-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-primary-600 mb-1" id="filtered-common-count">0</div>
                        <div class="text-xs text-primary-700 font-medium">Common Records</div>
                    </div>
                    
                    <div class="bg-green-50 border border-green-200 rounded-xl p-4 text-center">
                        <i data-feather="user-x" class="w-6 h-6 text-green-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-green-600 mb-1" id="filtered-unique-file2-count">0</div>
                        <div class="text-xs text-green-700 font-medium">Unique to File 2 (Email)</div>
                    </div>
                </div>
            </div>
            
            <!-- Download Buttons -->
            <div class="text-center mb-6 flex flex-wrap justify-center gap-4">
                <button id="download-filtered-btn" class="bg-blue-500 hover:bg-blue-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center">
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download Filtered Comparison Results
                </button>
                <button id="download-updated-file2-btn" class="bg-green-500 hover:bg-green-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center">
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download Updated File 2
                </button>
            </div>
            
            <!-- Non-Filtered Comparison Section -->
            <div class="bg-purple-50 border border-purple-200 rounded-xl p-6 mb-8">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="eye" class="w-6 h-6 text-purple-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-purple-700">Non-Filtered Comparison Results</h3>
                </div>
                <p class="text-center text-purple-600 text-sm mb-4">Comparing File 1 (CNA) with File 2 (Email) including all records</p>
                
                <div class="grid md:grid-cols-3 gap-6">
                    <div class="bg-yellow-50 border border-yellow-200 rounded-xl p-4 text-center">
                        <i data-feather="user-plus" class="w-6 h-6 text-yellow-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-yellow-600 mb-1" id="non-filtered-unique-file1-count">0</div>
                        <div class="text-xs text-yellow-700 font-medium">Unique to File 1 (CNA)</div>
                    </div>
                    
                    <div class="bg-primary-50 border border-primary-200 rounded-xl p-4 text-center">
                        <i data-feather="user-check" class="w-6 h-6 text-primary-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-primary-600 mb-1" id="non-filtered-common-count">0</div>
                        <div class="text-xs text-primary-700 font-medium">Common Records</div>
                    </div>
                    
                    <div class="bg-green-50 border border-green-200 rounded-xl p-4 text-center">
                        <i data-feather="user-x" class="w-6 h-6 text-green-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-green-600 mb-1" id="non-filtered-unique-file2-count">0</div>
                        <div class="text-xs text-green-700 font-medium">Unique to File 2 (Email)</div>
                    </div>
                </div>
            </div>

            <!-- Download Buttons -->
            <div class="text-center mb-6 flex flex-wrap justify-center gap-4">
                <button id="download-non-filtered-btn" class="bg-purple-500 hover:bg-purple-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center">
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download Non-Filtered Comparison Results
                </button>
                <button id="download-updated-file2-non-filtered-btn" class="bg-orange-500 hover:bg-orange-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center">
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download Updated File 2
                </button>
            </div>
        <!-- File 3 Results Section -->
        <div id="file3-results" class="hidden bg-white rounded-2xl shadow-lg p-8 mb-8">
            <h2 class="text-2xl font-bold text-gray-900 mb-6 text-center">File 3 Analysis Results</h2>
            <!-- Summary Stats -->
            <div class="bg-green-50 border border-green-200 rounded-xl p-6 mb-6">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="bar-chart-2" class="w-6 h-6 text-green-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-green-700">M1 Status Summary</h3>
                </div>
                <div class="grid md:grid-cols-2 lg:grid-cols-4 gap-4">
                    <div class="bg-white rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-green-600 mb-1" id="m1-completed-count">0</div>
                        <div class="text-sm text-green-700 font-medium">Completed</div>
                        <div class="text-xs text-green-500 mt-1">Records with "completed" status</div>
                    </div>
                    <div class="bg-blue-50 border border-blue-200 rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-blue-600 mb-1" id="m1-enrolled-count">0</div>
                        <div class="text-sm text-blue-700 font-medium">Enrolled</div>
                        <div class="text-xs text-blue-500 mt-1">Records with "enrolled" status</div>
                    </div>
                    <div class="bg-orange-50 border border-orange-200 rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-orange-600 mb-1" id="m1-not-enrolled-count">0</div>
                        <div class="text-sm text-orange-700 font-medium">Not Enrolled</div>
                        <div class="text-xs text-orange-500 mt-1">Records with "not enrolled" status</div>
                    </div>
                    <div class="bg-gray-50 border border-gray-200 rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-gray-600 mb-1" id="file3-removed-count">0</div>
                        <div class="text-sm text-gray-700 font-medium">Records Removed</div>
                        <div class="text-xs text-gray-500 mt-1">THEI department records</div>
                    </div>
                </div>
            </div>
<!-- Download Button -->
            <div class="text-center mb-6">
                <button id="download-file3-btn" class="bg-green-500 hover:bg-green-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center">
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download Filtered File 3
                </button>
            </div>

            <!-- File 3 vs File 2 Comparison Section -->
            <div class="bg-indigo-50 border border-indigo-200 rounded-xl p-6 mb-6">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="git-compare" class="w-6 h-6 text-indigo-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-indigo-700">Completed Records Comparison (File 3 vs File 2)</h3>
                </div>
                <p class="text-center text-indigo-600 text-sm mb-4">Comparing "Completed" records from File 3 (CNA) with File 2 (EMAIL)</p>
                
                <div class="grid md:grid-cols-3 gap-6">
                    <div class="bg-yellow-50 border border-yellow-200 rounded-xl p-4 text-center">
                        <i data-feather="user-plus" class="w-6 h-6 text-yellow-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-yellow-600 mb-1" id="f3-vs-f2-unique-file3-count">0</div>
                        <div class="text-xs text-yellow-700 font-medium">Unique to File 3 (CNA)</div>
                    </div>
                    
                    <div class="bg-primary-50 border border-primary-200 rounded-xl p-4 text-center">
                        <i data-feather="user-check" class="w-6 h-6 text-primary-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-primary-600 mb-1" id="f3-vs-f2-common-count">0</div>
                        <div class="text-xs text-primary-700 font-medium">Common Records</div>
                    </div>
                    
                    <div class="bg-green-50 border border-green-200 rounded-xl p-4 text-center">
                        <i data-feather="user-x" class="w-6 h-6 text-green-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-green-600 mb-1" id="f3-vs-f2-unique-file2-count">0</div>
                        <div class="text-xs text-green-700 font-medium">Unique to File 2 (Email)</div>
                    </div>
                </div>
            </div>
            <!-- Download Button for F3 vs F2 Comparison -->
            <div class="text-center mb-6">
                <button id="download-f3-vs-f2-btn" class="bg-indigo-500 hover:bg-indigo-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center">
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download File 3 vs File 2 Comparison
                </button>
            </div>

            <!-- First Module Date Monthly Breakdown Section -->
            <div class="bg-cyan-50 border border-cyan-200 rounded-xl p-6 mb-6">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="calendar" class="w-6 h-6 text-cyan-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-cyan-700">First Module Date Monthly Breakdown (Common Records)</h3>
                </div>
                <p class="text-center text-cyan-600 text-sm mb-4">Counting "First Module Date" by month for common records (Completed)</p>
                
                <div id="first-module-date-breakdown" class="grid md:grid-cols-2 lg:grid-cols-3 gap-4">
                    <div class="bg-white rounded-lg p-4 text-center text-gray-500">
                        <div class="text-sm">No data available yet</div>
                    </div>
                </div>
            </div>

            <!-- Download Button for First Module Date Breakdown -->
            <div class="text-center mb-6">
                <button id="download-first-module-date-btn" class="bg-cyan-500 hover:bg-cyan-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center" disabled>
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download First Module Date Breakdown
                </button>
            </div>

            <!-- M5 Status Summary Section -->
<div class="bg-teal-50 border border-teal-200 rounded-xl p-6 mb-6">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="check-circle" class="w-6 h-6 text-teal-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-teal-700">M5 Status Summary</h3>
                </div>
                <div class="grid md:grid-cols-2 gap-4">
                    <div class="bg-white rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-teal-600 mb-1" id="m5-y-count">0</div>
                        <div class="text-sm text-teal-700 font-medium">M5 = "Y" Records</div>
                        <div class="text-xs text-teal-500 mt-1">Records with M5 value "Y"</div>
                    </div>
                    <div class="bg-gray-50 border border-gray-200 rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-gray-600 mb-1" id="m5-not-y-count">0</div>
                        <div class="text-sm text-gray-700 font-medium">M5 ≠ "Y" Records</div>
                        <div class="text-xs text-gray-500 mt-1">Records without M5 value "Y"</div>
                    </div>
                </div>
            </div>

            <!-- M5 (Y) vs File 2 Comparison Section -->
            <div class="bg-rose-50 border border-rose-200 rounded-xl p-6 mb-6">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="git-compare" class="w-6 h-6 text-rose-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-rose-700">M5 (Y) Records Comparison (File 3 vs File 2)</h3>
                </div>
                <p class="text-center text-rose-600 text-sm mb-4">Comparing "M5 = Y" records from File 3 (CNA) with File 2 (EMAIL)</p>
                
                <div class="grid md:grid-cols-3 gap-6">
                    <div class="bg-yellow-50 border border-yellow-200 rounded-xl p-4 text-center">
                        <i data-feather="user-plus" class="w-6 h-6 text-yellow-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-yellow-600 mb-1" id="m5-vs-f2-unique-file3-count">0</div>
                        <div class="text-xs text-yellow-700 font-medium">Unique to File 3 (CNA)</div>
                    </div>
                    
                    <div class="bg-primary-50 border border-primary-200 rounded-xl p-4 text-center">
                        <i data-feather="user-check" class="w-6 h-6 text-primary-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-primary-600 mb-1" id="m5-vs-f2-common-count">0</div>
                        <div class="text-xs text-primary-700 font-medium">Common Records</div>
                    </div>
                    
                    <div class="bg-green-50 border border-green-200 rounded-xl p-4 text-center">
                        <i data-feather="user-x" class="w-6 h-6 text-green-600 mx-auto mb-2"></i>
                        <div class="text-2xl font-bold text-green-600 mb-1" id="m5-vs-f2-unique-file2-count">0</div>
                        <div class="text-xs text-green-700 font-medium">Unique to File 2 (Email)</div>
                    </div>
                </div>
            </div>
            <!-- Download Button for M5 vs F2 Comparison -->
            <div class="text-center mb-6">
                <button id="download-m5-vs-f2-btn" class="bg-rose-500 hover:bg-rose-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center">
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download M5 (Y) vs File 2 Comparison
                </button>
            </div>

            <!-- M5 Not Equal to Y for Common Records Section -->
            <div class="bg-slate-50 border border-slate-200 rounded-xl p-6 mb-6">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="alert-circle" class="w-6 h-6 text-slate-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-slate-700">M5 ≠ "Y" in Common Records (Completed)</h3>
                </div>
                <p class="text-center text-slate-600 text-sm mb-4">Checking common records from Completed comparison where M5 is not equal to "Y"</p>
                
                <div class="grid md:grid-cols-2 gap-4">
                    <div class="bg-white rounded-lg p-4 text-center border border-slate-200">
                        <div class="text-2xl font-bold text-slate-600 mb-1" id="common-m5-not-y-count">0</div>
                        <div class="text-sm text-slate-700 font-medium">M5 ≠ "Y" Records</div>
                        <div class="text-xs text-slate-500 mt-1">Common records with M5 not equal to Y</div>
                    </div>
                    <div class="bg-emerald-50 border border-emerald-200 rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-emerald-600 mb-1" id="common-m5-y-count">0</div>
                        <div class="text-sm text-emerald-700 font-medium">M5 = "Y" Records</div>
                        <div class="text-xs text-emerald-500 mt-1">Common records with M5 equal to Y</div>
                    </div>
                </div>
            </div>

            <!-- Download Button for M5 Not Equal to Y in Common Records -->
            <div class="text-center mb-6">
                <button id="download-common-m5-not-y-btn" class="bg-slate-500 hover:bg-slate-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center" disabled>
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download M5 ≠ "Y" in Common Records
                </button>
            </div>

            <!-- Completion Date Monthly Breakdown Section -->
<div class="bg-amber-50 border border-amber-200 rounded-xl p-6 mb-6">
                <div class="flex items-center justify-center mb-4">
                    <i data-feather="calendar" class="w-6 h-6 text-amber-600 mr-2"></i>
                    <h3 class="text-lg font-semibold text-amber-700">Completion Date Monthly Breakdown (Common Records)</h3>
                </div>
                <p class="text-center text-amber-600 text-sm mb-4">Counting "Completion Date" by month for common records (M5 = Y)</p>
                
                <div id="completion-date-breakdown" class="grid md:grid-cols-2 lg:grid-cols-3 gap-4">
                    <div class="bg-white rounded-lg p-4 text-center text-gray-500">
                        <div class="text-sm">No data available yet</div>
                    </div>
                </div>
            </div>

            <!-- Download Button for Completion Date Breakdown -->
            <div class="text-center mb-6">
                <button id="download-completion-date-btn" class="bg-amber-500 hover:bg-amber-600 text-white px-6 py-2 rounded-lg font-medium transition-colors inline-flex items-center" disabled>
                    <i data-feather="download" class="w-4 h-4 mr-2"></i>
                    Download Completion Date Breakdown
                </button>
            </div>
</div>
<!-- Loading Spinner -->
<div id="loading" class="hidden fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
            <div class="bg-white rounded-xl p-6 flex items-center space-x-3">
                <div class="animate-spin rounded-full h-8 w-8 border-b-2 border-primary-500"></div>
                <span class="text-gray-700">Processing files...</span>
            </div>
        </div>
    </div>

    <script>
        let file1Data = null;
        let file2Data = null;
        let file3Data = null;
        let uniqueEnrolmentData = null;
        let nullRecords = [];
        let filteredFile1Data = null;
        let filteredFile3Data = null;
// File upload handlers
        document.getElementById('file1').addEventListener('change', function(e) {
            handleFileUpload(e, 1);
        });
document.getElementById('file2').addEventListener('change', function(e) {
            handleFileUpload(e, 2);
        });

document.getElementById('file3').addEventListener('change', function(e) {
            handleFileUpload(e, 3);
        });

        function handleFileUpload(event, fileNumber) {
const file = event.target.files[0];
            if (!file) return;

            const statusElement = document.getElementById(`file${fileNumber}-status`);
            statusElement.textContent = `Loading ${file.name}...`;
            statusElement.className = 'mt-3 text-sm text-blue-500';

            const reader = new FileReader();
            reader.onload = function(e) {
                try {
                    const data = new Uint8Array(e.target.result);
                    const workbook = XLSX.read(data, { type: 'array' });
                    
                    // Get first sheet
                    const firstSheet = workbook.Sheets[workbook.SheetNames[0]];
                    const jsonData = XLSX.utils.sheet_to_json(firstSheet);
                    if (fileNumber === 1) {
                        file1Data = jsonData;
                        statusElement.textContent = `${file.name} loaded (${jsonData.length} records)`;
                        statusElement.className = 'mt-3 text-sm text-green-500';
                    } else if (fileNumber === 2) {
                        file2Data = jsonData;
                        statusElement.textContent = `${file.name} loaded (${jsonData.length} records)`;
                        statusElement.className = 'mt-3 text-sm text-green-500';
                    } else if (fileNumber === 3) {
                        file3Data = jsonData;
                        statusElement.textContent = `${file.name} loaded (${jsonData.length} records)`;
                        statusElement.className = 'mt-3 text-sm text-green-500';
                    }
updateCompareButton();
                } catch (error) {
                    statusElement.textContent = `Error loading file: ${error.message}`;
                    statusElement.className = 'mt-3 text-sm text-red-500';
                }
            };
            reader.readAsArrayBuffer(file);
        }
        function updateCompareButton() {
            const compareBtn = document.getElementById('compare-btn');
            compareBtn.disabled = !(file1Data && file2Data);
            
            const processFile3Btn = document.getElementById('process-file3-btn');
            processFile3Btn.disabled = !file3Data;
        }
// Clear button handler
        document.getElementById('clear-btn').addEventListener('click', function() {
            // Clear file inputs
            document.getElementById('file1').value = '';
            document.getElementById('file2').value = '';
            document.getElementById('file3').value = '';
            
            // Clear status displays
            document.getElementById('file1-status').textContent = '';
            document.getElementById('file2-status').textContent = '';
            document.getElementById('file3-status').textContent = '';
                    // Clear data variables
                    file1Data = null;
                    file2Data = null;
                    file3Data = null;
                    filteredFile3Data = null;
uniqueEnrolmentData = null;
                    nullRecords = [];
                    
                    // Disable download button
                    document.getElementById('download-null-btn').disabled = true;
                    document.getElementById('download-filtered-btn').disabled = true;
// Disable buttons
                    document.getElementById('compare-btn').disabled = true;
// Hide results sections
                    document.getElementById('results').classList.add('hidden');
                    document.getElementById('file3-results').classList.add('hidden');
// Reset status classes
            document.getElementById('file1-status').className = 'mt-3 text-sm text-gray-500';
            document.getElementById('file2-status').className = 'mt-3 text-sm text-gray-500';
            document.getElementById('file3-status').className = 'mt-3 text-sm text-gray-500';
            // Disable file3 button
            document.getElementById('process-file3-btn').disabled = true;
            document.getElementById('download-file3-btn').disabled = true;
            document.getElementById('download-first-module-date-btn').disabled = true;
            document.getElementById('download-m5-vs-f2-btn').disabled = true;
}
);
        // Initialize download buttons as disabled
        document.getElementById('download-null-btn').disabled = true;
        document.getElementById('download-filtered-btn').disabled = true;
        document.getElementById('download-non-filtered-btn').disabled = true;
        document.getElementById('download-updated-file2-btn').disabled = true;
        document.getElementById('download-updated-file2-non-filtered-btn').disabled = true;
        document.getElementById('download-file3-btn').disabled = true;
// Compare function
document.getElementById('compare-btn').addEventListener('click', function() {
if (!file1Data || !file2Data) return;

            // Show loading
            document.getElementById('loading').classList.remove('hidden');

            // Process after a small delay to show loading state
            setTimeout(() => {
                compareData();
                document.getElementById('loading').classList.add('hidden');
            }, 500);
        });
        function compareData() {
            // Count null values in m1_select_session column of File 1
            let file1NullCount = 0;
            nullRecords = [];
            
            // Count null/blank values in email column of File 2
            let file2NullCount = 0;
            let file2NullRecords = [];
            
            // Count duplicate emails in File 2
            let file2DuplicateCount = 0;
            const emailCount = new Map();
            const duplicateEmails = new Set();
            
            // Enable download buttons
            document.getElementById('download-null-btn').disabled = false;
            document.getElementById('download-filtered-btn').disabled = false;
            document.getElementById('download-non-filtered-btn').disabled = false;
            document.getElementById('download-updated-file2-btn').disabled = false;
            document.getElementById('download-updated-file2-non-filtered-btn').disabled = false;

            // Count null values in File 2 and track duplicates
            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                // Check for null/blank emails
                if (email === null || email === undefined || 
                    email === '' || email.toString().toLowerCase() === 'null') {
                    file2NullCount++;
                    file2NullRecords.push({
                        ...row,
                        Status: "Null/Blank Email"
                    });
                } else {
                    // Track email occurrences for duplicate detection
                    const emailKey = email.toString().trim().toLowerCase();
                    emailCount.set(emailKey, (emailCount.get(emailKey) || 0) + 1);
                    if (emailCount.get(emailKey) === 2) {
                        duplicateEmails.add(emailKey);
                    }
                }
            });
            
            // Count total duplicates
            file2DuplicateCount = Array.from(duplicateEmails).reduce((count, email) => {
                return count + (emailCount.get(email) - 1);
            }, 0);

            // Update File 2 null count and duplicates display
            document.getElementById('file2-null-count').textContent = file2NullCount;
            document.getElementById('file2-duplicates-count').textContent = file2DuplicateCount;

            // Filter out null values from file1 to create filteredFile1Data
            filteredFile1Data = file1Data.filter(row => {
                const m1SelectSession = row.m1_select_session || row.M1_SELECT_SESSION || row['m1_select_session'];
                if (m1SelectSession === null || m1SelectSession === undefined || 
                    m1SelectSession === '' || m1SelectSession.toString().toLowerCase() === 'null') {
                    file1NullCount++;
                    nullRecords.push({
                        ...row,
                        Status: "Null values found"
                    });
                    return false; // Exclude this row from filtered data
                }
                return true; // Include this row in filtered data
            });

            // Update File 1 null count display
            document.getElementById('file1-null-count').textContent = file1NullCount;

            // Extract CNA from filtered file1 and Email from file2
            const file1CNA = new Set();
            const file1EmailMap = new Map();
            const file1DataMap = new Map();
// Process filtered file1 data (CNA column)
            filteredFile1Data.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                const email = row.email || row.EMAIL || row.Email;
                if (cna && typeof cna === 'string') {
                    const cnaKey = cna.trim().toLowerCase();
                    file1CNA.add(cnaKey);
                    if (email && typeof email === 'string') {
                        file1EmailMap.set(cnaKey, email.trim());
                    }
                    file1DataMap.set(cnaKey, row);
                }
            });

            const file2Email = new Set();
            const file2DataMap = new Map();

            // Process file2 data (Email column)
            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    const emailKey = email.trim().toLowerCase();
                    file2Email.add(emailKey);
                    file2DataMap.set(emailKey, row);
                }
            });
            // For original comparison, we compare CNA from original file1 with Email from file2
            // Need to get original CNA values (including nulls) for accurate count
            const originalFile1CNA = new Set();
            file1Data.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    originalFile1CNA.add(cna.trim().toLowerCase());
                }
            });
            // Calculate intersections and differences for original comparison
            const common = new Set([...originalFile1CNA].filter(cna => file2Email.has(cna)));
            const uniqueToFile1 = new Set([...originalFile1CNA].filter(cna => !file2Email.has(cna)));
            const uniqueToFile2 = new Set([...file2Email].filter(email => !originalFile1CNA.has(email)));
            
            // Calculate intersections and differences for non-filtered comparison (original CNA vs Email)
            const nonFilteredCommon = new Set([...originalFile1CNA].filter(cna => file2Email.has(cna)));
            const nonFilteredUniqueToFile1 = new Set([...originalFile1CNA].filter(cna => !file2Email.has(cna)));
            const nonFilteredUniqueToFile2 = new Set([...file2Email].filter(email => !originalFile1CNA.has(email)));
// Calculate intersections and differences for filtered comparison (CNA vs Email)
            const filteredCommon = new Set([...file1CNA].filter(cna => file2Email.has(cna)));
            const filteredUniqueToFile1 = new Set([...file1CNA].filter(cna => !file2Email.has(cna)));
            const filteredUniqueToFile2 = new Set([...file2Email].filter(email => !file1CNA.has(email)));
// Create separate data for unique enrolment records (from original file1 data)
            uniqueEnrolmentData = Array.from(uniqueToFile1).map(cna => {
                const originalRow = file1DataMap.get(cna);
                return {
                    ...originalRow,
                    Status: 'Unique to Enrolment List',
                    Note: 'Record from Enrolment List not found in Staff List'
                };
            });
            
            // Update UI with results for filtered comparison
            document.getElementById('filtered-common-count').textContent = filteredCommon.size;
            document.getElementById('filtered-unique-file1-count').textContent = filteredUniqueToFile1.size;
            document.getElementById('filtered-unique-file2-count').textContent = filteredUniqueToFile2.size;
            
            // Update UI with results for non-filtered comparison
            document.getElementById('non-filtered-common-count').textContent = nonFilteredCommon.size;
            document.getElementById('non-filtered-unique-file1-count').textContent = nonFilteredUniqueToFile1.size;
            document.getElementById('non-filtered-unique-file2-count').textContent = nonFilteredUniqueToFile2.size;
// Display detailed records for original comparison
// Show results section
            document.getElementById('results').classList.remove('hidden');
            // Scroll to results
            document.getElementById('results').scrollIntoView({ behavior: 'smooth' });
        }

        // Process File 3 button handler
        document.getElementById('process-file3-btn').addEventListener('click', function() {
            if (!file3Data) return;

            // Show loading
            document.getElementById('loading').classList.remove('hidden');

            // Process after a small delay to show loading state
            setTimeout(() => {
                processFile3Data();
                document.getElementById('loading').classList.add('hidden');
            }, 500);
        });

        function processFile3Data() {
            // Filter out rows where department starts with "THEI"
            filteredFile3Data = file3Data.filter(row => {
                const department = row.department || row.DEPARTMENT || row.Department;
                if (department && typeof department === 'string') {
                    return !department.trim().toUpperCase().startsWith('THEI');
                }
                return true; // Keep if no department column
            });

            const removedCount = file3Data.length - filteredFile3Data.length;
            // Count completed, enrolled, and not enrolled in M1 Status column
            let completedCount = 0;
            let enrolledCount = 0;
            let notEnrolledCount = 0;
            let otherCount = 0;

            filteredFile3Data.forEach(row => {
                const m1Status = row['M1 Status'] || row['m1_status'] || row['M1_STATUS'] || row.m1Status;
                if (m1Status && typeof m1Status === 'string') {
                    const statusLower = m1Status.toString().trim().toLowerCase();
                    if (statusLower === 'completed') {
                        completedCount++;
                    } else if (statusLower === 'enrolled') {
                        enrolledCount++;
                    } else if (statusLower === 'not enrolled') {
                        notEnrolledCount++;
                    } else {
                        otherCount++; // Other statuses
                    }
                } else {
                    otherCount++; // Missing status
                }
            });

            // Add other statuses to not enrolled (for display purposes)
            notEnrolledCount += otherCount;

            // Update UI
            document.getElementById('m1-completed-count').textContent = completedCount;
            document.getElementById('m1-enrolled-count').textContent = enrolledCount;
            document.getElementById('m1-not-enrolled-count').textContent = notEnrolledCount;
            document.getElementById('file3-removed-count').textContent = removedCount;
// Compare File 3 (completed records) with File 2 (email)
            compareFile3WithFile2();
            // Enable download buttons
            document.getElementById('download-file3-btn').disabled = false;
            document.getElementById('download-f3-vs-f2-btn').disabled = false;
            document.getElementById('download-first-module-date-btn').disabled = window.firstModuleDateBreakdownData && window.firstModuleDateBreakdownData.length > 0 ? false : true;
// Show results section
            document.getElementById('file3-results').classList.remove('hidden');

            // Scroll to results
            document.getElementById('file3-results').scrollIntoView({ behavior: 'smooth' });
        }
        // Function to compare File 3 (completed) with File 2
        function compareFile3WithFile2() {
            if (!filteredFile3Data || !file2Data) return;

            // Get only completed records from File 3
            const completedFile3Records = filteredFile3Data.filter(row => {
                const m1Status = row['M1 Status'] || row['m1_status'] || row['M1_STATUS'] || row.m1Status;
                if (m1Status && typeof m1Status === 'string') {
                    return m1Status.toString().trim().toLowerCase() === 'completed';
                }
                return false;
            });

            // Extract CNA from completed File 3 records
            const file3CNA = new Set();
            const file3DataMap = new Map();

            completedFile3Records.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    const cnaKey = cna.trim().toLowerCase();
                    file3CNA.add(cnaKey);
                    file3DataMap.set(cnaKey, row);
                }
            });

            // Extract Email from File 2
            const file2Email = new Set();
            const file2DataMap = new Map();

            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    const emailKey = email.trim().toLowerCase();
                    file2Email.add(emailKey);
                    file2DataMap.set(emailKey, row);
                }
            });

            // Calculate intersections and differences
            const common = new Set([...file3CNA].filter(cna => file2Email.has(cna)));
            const uniqueToFile3 = new Set([...file3CNA].filter(cna => !file2Email.has(cna)));
            const uniqueToFile2 = new Set([...file2Email].filter(email => !file3CNA.has(email)));

            // Update UI
            document.getElementById('f3-vs-f2-common-count').textContent = common.size;
            document.getElementById('f3-vs-f2-unique-file3-count').textContent = uniqueToFile3.size;
            document.getElementById('f3-vs-f2-unique-file2-count').textContent = uniqueToFile2.size;

            // Process first module date breakdown for common records
            processFirstModuleDateBreakdown(common, file3DataMap);

            // Call M5 comparison function
            compareM5WithFile2();

            // Process M5 not equal to Y for common records
            processM5NotYInCommonRecords(common, file3DataMap);
}
// Function to compare M5 (Y) records from File 3 with File 2
        function compareM5WithFile2() {
            if (!filteredFile3Data || !file2Data) return;

            // Count M5 = "Y" and M5 ≠ "Y"
            let m5YCount = 0;
            let m5NotYCount = 0;

            filteredFile3Data.forEach(row => {
                const m5Value = row['M5'] || row['m5'] || row['M5_STATUS'] || row.m5;
                if (m5Value && typeof m5Value === 'string') {
                    const m5Trimmed = m5Value.toString().trim().toUpperCase();
                    if (m5Trimmed === 'Y') {
                        m5YCount++;
                    } else {
                        m5NotYCount++;
                    }
                } else {
                    m5NotYCount++; // Count as not Y if M5 is missing
                }
            });

            // Update UI for M5 summary
            document.getElementById('m5-y-count').textContent = m5YCount;
            document.getElementById('m5-not-y-count').textContent = m5NotYCount;

            // Get only records where M5 = "Y" from File 3
            const m5YRecords = filteredFile3Data.filter(row => {
                const m5Value = row['M5'] || row['m5'] || row['M5_STATUS'] || row.m5;
                if (m5Value && typeof m5Value === 'string') {
                    return m5Value.toString().trim().toUpperCase() === 'Y';
                }
                return false;
            });

            // Extract CNA from M5 = "Y" File 3 records
            const m5File3CNA = new Set();
            const m5File3DataMap = new Map();

            m5YRecords.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    const cnaKey = cna.trim().toLowerCase();
                    m5File3CNA.add(cnaKey);
                    m5File3DataMap.set(cnaKey, row);
                }
            });

            // Extract Email from File 2 (reuse existing)
            const file2Email = new Set();
            const file2DataMap = new Map();

            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    const emailKey = email.trim().toLowerCase();
                    file2Email.add(emailKey);
                    file2DataMap.set(emailKey, row);
                }
            });

            // Calculate intersections and differences for M5 comparison
            const m5Common = new Set([...m5File3CNA].filter(cna => file2Email.has(cna)));
            const m5UniqueToFile3 = new Set([...m5File3CNA].filter(cna => !file2Email.has(cna)));
            const m5UniqueToFile2 = new Set([...file2Email].filter(email => !m5File3CNA.has(email)));

            // Update UI for M5 comparison
            document.getElementById('m5-vs-f2-common-count').textContent = m5Common.size;
            document.getElementById('m5-vs-f2-unique-file3-count').textContent = m5UniqueToFile3.size;
            document.getElementById('m5-vs-f2-unique-file2-count').textContent = m5UniqueToFile2.size;
            // Enable download button
            document.getElementById('download-m5-vs-f2-btn').disabled = false;
            document.getElementById('download-common-m5-not-y-btn').disabled = window.commonM5NotYRecords && window.commonM5NotYRecords.length > 0 ? false : true;
// Process completion date breakdown for common records
            processCompletionDateBreakdown(m5Common, m5File3DataMap);
        }
        // Function to process first module date breakdown for common records
        function processFirstModuleDateBreakdown(commonSet, dataMap) {
            const monthCounts = new Map();

            commonSet.forEach(cna => {
                const row = dataMap.get(cna);
                if (row) {
                    const firstModuleDate = row['First Module Date'] || row['first_module_date'] || row['FIRST_MODULE_DATE'] || row.firstModuleDate;
                    
                    if (firstModuleDate && typeof firstModuleDate === 'string' && firstModuleDate.trim() !== '') {
                        try {
                            // Parse the date and extract month
                            const dateObj = new Date(firstModuleDate);
                            
                            // Check if date is valid
                            if (!isNaN(dateObj.getTime())) {
                                const monthKey = dateObj.toLocaleString('en-US', { 
                                    year: 'numeric', 
                                    month: 'long' 
                                });
                                
                                monthCounts.set(monthKey, (monthCounts.get(monthKey) || 0) + 1);
                            }
                        } catch (e) {
                            // Invalid date format, skip
                        }
                    }
                }
            });

            // Sort months chronologically
            const sortedMonths = Array.from(monthCounts.entries()).sort((a, b) => {
                const dateA = new Date(a[0] + ' 1, 2000');
                const dateB = new Date(b[0] + ' 1, 2000');
                return dateA - dateB;
            });

            // Update UI
            const breakdownContainer = document.getElementById('first-module-date-breakdown');
            
            if (sortedMonths.length === 0) {
                breakdownContainer.innerHTML = `
                    <div class="bg-white rounded-lg p-4 text-center text-gray-500 col-span-full">
                        <div class="text-sm">No valid first module dates found in common records</div>
                    </div>
                `;
            } else {
                breakdownContainer.innerHTML = sortedMonths.map(([month, count]) => `
                    <div class="bg-white rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-cyan-600 mb-1">${count}</div>
                        <div class="text-xs text-cyan-700 font-medium">${month}</div>
                    </div>
                `).join('');
            }

            // Store breakdown data for download
            window.firstModuleDateBreakdownData = sortedMonths;

            // Enable download button if there's data
            document.getElementById('download-first-module-date-btn').disabled = sortedMonths.length === 0;
        }

        // Download first module date breakdown
        document.getElementById('download-first-module-date-btn').addEventListener('click', function() {
            if (!window.firstModuleDateBreakdownData || window.firstModuleDateBreakdownData.length === 0) return;

            // Prepare data for export
            const exportData = [];

            // Add header row
            exportData.push({
                "Month": "",
                "Count": "",
                "Details": "First Module Date Monthly Breakdown for Common Records (Completed)"
            });

            // Add separator
            exportData.push({
                "Month": "",
                "Count": "",
                "Details": ""
            });

            // Add monthly data
            window.firstModuleDateBreakdownData.forEach(([month, count]) => {
                exportData.push({
                    "Month": month,
                    "Count": count,
                    "Details": ""
                });
            });

            // Add total
            const total = window.firstModuleDateBreakdownData.reduce((sum, [_, count]) => sum + count, 0);
            exportData.push({
                "Month": "Total",
                "Count": total,
                "Details": ""
            });

            // Create worksheet from export data
            const ws = XLSX.utils.json_to_sheet(exportData);

            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "First Module Date Breakdown");

            // Export to file
            XLSX.writeFile(wb, "first_module_date_breakdown.xlsx");
        });

        // Function to process completion date breakdown for common records
        function processCompletionDateBreakdown(commonSet, dataMap) {
const monthCounts = new Map();

            commonSet.forEach(cna => {
                const row = dataMap.get(cna);
                if (row) {
                    const completionDate = row['Completion Date'] || row['completion_date'] || row['COMPLETION_DATE'] || row.completionDate;
                    
                    if (completionDate && typeof completionDate === 'string' && completionDate.trim() !== '') {
                        try {
                            // Parse the date and extract month
                            const dateObj = new Date(completionDate);
                            
                            // Check if date is valid
                            if (!isNaN(dateObj.getTime())) {
                                const monthKey = dateObj.toLocaleString('en-US', { 
                                    year: 'numeric', 
                                    month: 'long' 
                                });
                                
                                monthCounts.set(monthKey, (monthCounts.get(monthKey) || 0) + 1);
                            }
                        } catch (e) {
                            // Invalid date format, skip
                        }
                    }
                }
            });

            // Sort months chronologically
            const sortedMonths = Array.from(monthCounts.entries()).sort((a, b) => {
                const dateA = new Date(a[0] + ' 1, 2000');
                const dateB = new Date(b[0] + ' 1, 2000');
                return dateA - dateB;
            });

            // Update UI
            const breakdownContainer = document.getElementById('completion-date-breakdown');
            
            if (sortedMonths.length === 0) {
                breakdownContainer.innerHTML = `
                    <div class="bg-white rounded-lg p-4 text-center text-gray-500 col-span-full">
                        <div class="text-sm">No valid completion dates found in common records</div>
                    </div>
                `;
            } else {
                breakdownContainer.innerHTML = sortedMonths.map(([month, count]) => `
                    <div class="bg-white rounded-lg p-4 text-center">
                        <div class="text-2xl font-bold text-amber-600 mb-1">${count}</div>
                        <div class="text-xs text-amber-700 font-medium">${month}</div>
                    </div>
                `).join('');
            }

            // Store breakdown data for download
            window.completionDateBreakdownData = sortedMonths;

            // Enable download button if there's data
            document.getElementById('download-completion-date-btn').disabled = sortedMonths.length === 0;
        }
        // Download completion date breakdown
        document.getElementById('download-completion-date-btn').addEventListener('click', function() {
            if (!window.completionDateBreakdownData || window.completionDateBreakdownData.length === 0) return;

            // Prepare data for export
            const exportData = [];

            // Add header row
            exportData.push({
                "Month": "",
                "Count": "",
                "Details": "Completion Date Monthly Breakdown for Common Records (M5 = Y)"
            });

            // Add separator
            exportData.push({
                "Month": "",
                "Count": "",
                "Details": ""
            });

            // Add monthly data
            window.completionDateBreakdownData.forEach(([month, count]) => {
                exportData.push({
                    "Month": month,
                    "Count": count,
                    "Details": ""
                });
            });

            // Add total
            const total = window.completionDateBreakdownData.reduce((sum, [_, count]) => sum + count, 0);
            exportData.push({
                "Month": "Total",
                "Count": total,
                "Details": ""
            });

            // Create worksheet from export data
            const ws = XLSX.utils.json_to_sheet(exportData);

            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "Completion Date Breakdown");

            // Export to file
            XLSX.writeFile(wb, "completion_date_breakdown.xlsx");
        });

        // Function to process M5 not equal to Y for common records
        function processM5NotYInCommonRecords(commonSet, dataMap) {
            let m5NotYCount = 0;
            let m5YCount = 0;
            const m5NotYRecords = [];

            commonSet.forEach(cna => {
                const row = dataMap.get(cna);
                if (row) {
                    const m5Value = row['M5'] || row['m5'] || row['M5_STATUS'] || row.m5;
                    let isM5Y = false;

                    if (m5Value && typeof m5Value === 'string') {
                        const m5Trimmed = m5Value.toString().trim().toUpperCase();
                        if (m5Trimmed === 'Y') {
                            m5YCount++;
                            isM5Y = true;
                        }
                    }

                    if (!isM5Y) {
                        m5NotYCount++;
                        m5NotYRecords.push({
                            ...row,
                            Status: "M5 not equal to Y"
                        });
                    }
                }
            });

            // Update UI
            document.getElementById('common-m5-not-y-count').textContent = m5NotYCount;
            document.getElementById('common-m5-y-count').textContent = m5YCount;

            // Store data for download
            window.commonM5NotYRecords = m5NotYRecords;

            // Enable download button if there's data
            document.getElementById('download-common-m5-not-y-btn').disabled = m5NotYRecords.length === 0;
        }

        // Download M5 not equal to Y in common records
        document.getElementById('download-common-m5-not-y-btn').addEventListener('click', function() {
            if (!window.commonM5NotYRecords || window.commonM5NotYRecords.length === 0) return;

            // Create worksheet from data
            const ws = XLSX.utils.json_to_sheet(window.commonM5NotYRecords);

            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "M5 Not Y in Common Records");

            // Export to file
            XLSX.writeFile(wb, "common_records_m5_not_y.xlsx");
        });
// Download filtered File 3
        document.getElementById('download-file3-btn').addEventListener('click', function() {
            if (!filteredFile3Data || filteredFile3Data.length === 0) return;
// Create worksheet from filtered data
            const ws = XLSX.utils.json_to_sheet(filteredFile3Data);
            
            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "Filtered File 3");
            
            // Export to file
            XLSX.writeFile(wb, "filtered_file3.xlsx");
        });
// Download null values report
        document.getElementById('download-null-btn').addEventListener('click', function() {
            if (!file1Data || file1Data.length === 0) return;
            
            // Create report data based on original file1 data with status column
            const reportData = file1Data.map(row => {
                const m1SelectSession = row.m1_select_session || row.M1_SELECT_SESSION || row['m1_select_session'];
                const isNull = (m1SelectSession === null || m1SelectSession === undefined || 
                               m1SelectSession === '' || m1SelectSession.toString().toLowerCase() === 'null');
                
                return {
                    ...row,
                    Status: isNull ? "Null values found" : "Valid"
                };
            });
            
            // Create worksheet from report data
            const ws = XLSX.utils.json_to_sheet(reportData);
            
            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "Null Values Report");
            
            // Export to file
            XLSX.writeFile(wb, "null_values_report.xlsx");
        });

        // Download filtered comparison results
        document.getElementById('download-filtered-btn').addEventListener('click', function() {
            if (!file1Data || !file2Data || !filteredFile1Data) return;
            
            // Prepare data for export
            const exportData = [];
            
            // Add header row
            exportData.push({
                "Type": "Summary",
                "Count": "",
                "Details": "Filtered Comparison Results"
            });
            
            // Add summary rows
            exportData.push({
                "Type": "Common Records (CNA in both files)",
                "Count": document.getElementById('filtered-common-count').textContent,
                "Details": ""
            });
            
            exportData.push({
                "Type": "Unique to Enrolment List (CNA only)",
                "Count": document.getElementById('filtered-unique-file1-count').textContent,
                "Details": ""
            });
            
            exportData.push({
                "Type": "Unique to Staff List (Email only)",
                "Count": document.getElementById('filtered-unique-file2-count').textContent,
                "Details": ""
            });
            
            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });
            
            // Add detailed records
            exportData.push({
                "Type": "Common Records (CNA)",
                "Count": "",
                "Details": ""
            });
            
            // Get common records
            const file1CNA = new Set();
            const file2Email = new Set();
            
            filteredFile1Data.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    file1CNA.add(cna.trim().toLowerCase());
                }
            });
            
            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    file2Email.add(email.trim().toLowerCase());
                }
            });
            
            const filteredCommon = new Set([...file1CNA].filter(cna => file2Email.has(cna)));
            
            if (filteredCommon.size === 0) {
                exportData.push({
                    "Type": "No common records found",
                    "Count": "",
                    "Details": ""
                });
            } else {
                filteredCommon.forEach(record => {
                    exportData.push({
                        "Type": "Common",
                        "Count": "",
                        "Details": record
                    });
                });
            }
            
            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });
            
            // Add unique to File 1 records
            exportData.push({
                "Type": "Unique to Enrolment List (CNA)",
                "Count": "",
                "Details": ""
            });
            
            const filteredUniqueToFile1 = new Set([...file1CNA].filter(cna => !file2Email.has(cna)));
            
            if (filteredUniqueToFile1.size === 0) {
                exportData.push({
                    "Type": "No unique records in Enrolment List",
                    "Count": "",
                    "Details": ""
                });
            } else {
                filteredUniqueToFile1.forEach(record => {
                    exportData.push({
                        "Type": "Unique File 1",
                        "Count": "",
                        "Details": record
                    });
                });
            }
            
            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });
            
            // Add unique to File 2 records
            exportData.push({
                "Type": "Unique to Staff List (Email)",
                "Count": "",
                "Details": ""
            });
            
            const filteredUniqueToFile2 = new Set([...file2Email].filter(email => !file1CNA.has(email)));
            
            if (filteredUniqueToFile2.size === 0) {
                exportData.push({
                    "Type": "No unique records in Staff List",
                    "Count": "",
                    "Details": ""
                });
            } else {
                filteredUniqueToFile2.forEach(record => {
                    exportData.push({
                        "Type": "Unique File 2",
                        "Count": "",
                        "Details": record
                    });
                });
            }
            
            // Create worksheet from export data
            const ws = XLSX.utils.json_to_sheet(exportData);
            
            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "Filtered Comparison Results");
            
            // Export to file
            XLSX.writeFile(wb, "filtered_comparison_results.xlsx");
        });

        // Download non-filtered comparison results
        document.getElementById('download-non-filtered-btn').addEventListener('click', function() {
            if (!file1Data || !file2Data) return;
            
            // Prepare data for export
            const exportData = [];
            
            // Add header row
            exportData.push({
                "Type": "Summary",
                "Count": "",
                "Details": "Non-Filtered Comparison Results"
            });
            
            // Add summary rows
            exportData.push({
                "Type": "Common Records (CNA in both files)",
                "Count": document.getElementById('non-filtered-common-count').textContent,
                "Details": ""
            });
            
            exportData.push({
                "Type": "Unique to Enrolment List (CNA only)",
                "Count": document.getElementById('non-filtered-unique-file1-count').textContent,
                "Details": ""
            });
            
            exportData.push({
                "Type": "Unique to Staff List (Email only)",
                "Count": document.getElementById('non-filtered-unique-file2-count').textContent,
                "Details": ""
            });
            
            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });
            
            // Add detailed records
            exportData.push({
                "Type": "Common Records (CNA)",
                "Count": "",
                "Details": ""
            });
            
            // Get common records
            const file1CNA = new Set();
            const file2Email = new Set();
            
            file1Data.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    file1CNA.add(cna.trim().toLowerCase());
                }
            });
            
            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    file2Email.add(email.trim().toLowerCase());
                }
            });
            
            const nonFilteredCommon = new Set([...file1CNA].filter(cna => file2Email.has(cna)));
            
            if (nonFilteredCommon.size === 0) {
                exportData.push({
                    "Type": "No common records found",
                    "Count": "",
                    "Details": ""
                });
            } else {
                nonFilteredCommon.forEach(record => {
                    exportData.push({
                        "Type": "Common",
                        "Count": "",
                        "Details": record
                    });
                });
            }
            
            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });
            
            // Add unique to File 1 records
            exportData.push({
                "Type": "Unique to Enrolment List (CNA)",
                "Count": "",
                "Details": ""
            });
            
            const nonFilteredUniqueToFile1 = new Set([...file1CNA].filter(cna => !file2Email.has(cna)));
            
            if (nonFilteredUniqueToFile1.size === 0) {
                exportData.push({
                    "Type": "No unique records in Enrolment List",
                    "Count": "",
                    "Details": ""
                });
            } else {
                nonFilteredUniqueToFile1.forEach(record => {
                    exportData.push({
                        "Type": "Unique File 1",
                        "Count": "",
                        "Details": record
                    });
                });
            }
            
            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });
            
            // Add unique to File 2 records
            exportData.push({
                "Type": "Unique to Staff List (Email)",
                "Count": "",
                "Details": ""
            });
            
            const nonFilteredUniqueToFile2 = new Set([...file2Email].filter(email => !file1CNA.has(email)));
            
            if (nonFilteredUniqueToFile2.size === 0) {
                exportData.push({
                    "Type": "No unique records in Staff List",
                    "Count": "",
                    "Details": ""
                });
            } else {
                nonFilteredUniqueToFile2.forEach(record => {
                    exportData.push({
                        "Type": "Unique File 2",
                        "Count": "",
                        "Details": record
                    });
                });
            }
            
            // Create worksheet from export data
            const ws = XLSX.utils.json_to_sheet(exportData);
            
            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "Non-Filtered Comparison Results");
            
            // Export to file
            XLSX.writeFile(wb, "non_filtered_comparison_results.xlsx");
        });
        // Download updated file 2 with status column
        document.getElementById('download-updated-file2-btn').addEventListener('click', function() {
            if (!file1Data || !file2Data) return;
// Create sets for comparison
            const file1CNA = new Set();
            const file2Email = new Set();
            
            // Process filtered file1 data (CNA column)
            filteredFile1Data.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    file1CNA.add(cna.trim().toLowerCase());
                }
            });
            
            // Process file2 data (Email column)
            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    file2Email.add(email.trim().toLowerCase());
                }
            });
            
            // Create updated file2 data with status column
            const updatedFile2Data = file2Data.map(row => {
                const email = row.email || row.EMAIL || row.Email;
                let status = "Unique to File 2";
                
                if (email && typeof email === 'string') {
                    const emailKey = email.trim().toLowerCase();
                    if (file1CNA.has(emailKey)) {
                        status = "Common records";
                    }
                }
                
                return {
                    ...row,
                    Status: status
                };
            });
            
            // Create worksheet from updated data
            const ws = XLSX.utils.json_to_sheet(updatedFile2Data);
            
            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "Updated File 2");
            
            // Export to file
            XLSX.writeFile(wb, "updated_file2_with_status.xlsx");
        });

        // Download updated file 2 with status column (Non-Filtered)
        document.getElementById('download-updated-file2-non-filtered-btn').addEventListener('click', function() {
            if (!file1Data || !file2Data) return;
            
            // Create sets for comparison using original file1 data (non-filtered)
            const file1CNANonFiltered = new Set();
            const file2Email = new Set();
            
            // Process original file1 data (CNA column) - non-filtered
            file1Data.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    file1CNANonFiltered.add(cna.trim().toLowerCase());
                }
            });
            
            // Process file2 data (Email column)
            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    file2Email.add(email.trim().toLowerCase());
                }
            });
            
            // Create updated file2 data with status column based on non-filtered comparison
            const updatedFile2DataNonFiltered = file2Data.map(row => {
                const email = row.email || row.EMAIL || row.Email;
                let status = "Unique to File 2";
                
                if (email && typeof email === 'string') {
                    const emailKey = email.trim().toLowerCase();
                    if (file1CNANonFiltered.has(emailKey)) {
                        status = "Common records";
                    }
                }
                
                return {
                    ...row,
                    Status: status
                };
            });
            
            // Create worksheet from updated data
            const ws = XLSX.utils.json_to_sheet(updatedFile2DataNonFiltered);
            
            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "Updated File 2 Non-Filtered");
            // Export to file
            XLSX.writeFile(wb, "updated_file2_with_status_non_filtered.xlsx");
        });

        // Download File 3 vs File 2 comparison
        document.getElementById('download-f3-vs-f2-btn').addEventListener('click', function() {
            if (!filteredFile3Data || !file2Data) return;

            // Get only completed records from File 3
            const completedFile3Records = filteredFile3Data.filter(row => {
                const m1Status = row['M1 Status'] || row['m1_status'] || row['M1_STATUS'] || row.m1Status;
                if (m1Status && typeof m1Status === 'string') {
                    return m1Status.toString().trim().toLowerCase() === 'completed';
                }
                return false;
            });

            // Prepare data for export
            const exportData = [];

            // Add header row
            exportData.push({
                "Type": "Summary",
                "Count": "",
                "Details": "File 3 (Completed) vs File 2 Comparison Results"
            });

            // Add summary rows
            exportData.push({
                "Type": "Common Records (CNA in both files)",
                "Count": document.getElementById('f3-vs-f2-common-count').textContent,
                "Details": ""
            });

            exportData.push({
                "Type": "Unique to File 3 (Completed CNA only)",
                "Count": document.getElementById('f3-vs-f2-unique-file3-count').textContent,
                "Details": ""
            });

            exportData.push({
                "Type": "Unique to File 2 (Email only)",
                "Count": document.getElementById('f3-vs-f2-unique-file2-count').textContent,
                "Details": ""
            });

            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });

            // Extract CNA from completed File 3 records
            const file3CNA = new Set();
            const file3DataMap = new Map();

            completedFile3Records.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    const cnaKey = cna.trim().toLowerCase();
                    file3CNA.add(cnaKey);
                    file3DataMap.set(cnaKey, row);
                }
            });

            // Extract Email from File 2
            const file2Email = new Set();
            const file2DataMap = new Map();

            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    const emailKey = email.trim().toLowerCase();
                    file2Email.add(emailKey);
                    file2DataMap.set(emailKey, row);
                }
            });

            // Calculate intersections and differences
            const common = new Set([...file3CNA].filter(cna => file2Email.has(cna)));
            const uniqueToFile3 = new Set([...file3CNA].filter(cna => !file2Email.has(cna)));
            const uniqueToFile2 = new Set([...file2Email].filter(email => !file3CNA.has(email)));

            // Add common records
            exportData.push({
                "Type": "Common Records (CNA)",
                "Count": "",
                "Details": ""
            });

            if (common.size === 0) {
                exportData.push({
                    "Type": "No common records found",
                    "Count": "",
                    "Details": ""
                });
            } else {
                common.forEach(record => {
                    exportData.push({
                        "Type": "Common",
                        "Count": "",
                        "Details": record
                    });
                });
            }

            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });

            // Add unique to File 3 records
            exportData.push({
                "Type": "Unique to File 3 (Completed CNA)",
                "Count": "",
                "Details": ""
            });

            if (uniqueToFile3.size === 0) {
                exportData.push({
                    "Type": "No unique records in File 3",
                    "Count": "",
                    "Details": ""
                });
            } else {
                uniqueToFile3.forEach(record => {
                    exportData.push({
                        "Type": "Unique File 3",
                        "Count": "",
                        "Details": record
                    });
                });
            }

            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });

            // Add unique to File 2 records
            exportData.push({
                "Type": "Unique to File 2 (Email)",
                "Count": "",
                "Details": ""
            });

            if (uniqueToFile2.size === 0) {
                exportData.push({
                    "Type": "No unique records in File 2",
                    "Count": "",
                    "Details": ""
                });
            } else {
                uniqueToFile2.forEach(record => {
                    exportData.push({
                        "Type": "Unique File 2",
                        "Count": "",
                        "Details": record
                    });
                });
            }

            // Create worksheet from export data
            const ws = XLSX.utils.json_to_sheet(exportData);

            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "File 3 vs File 2 Comparison");

            // Export to file
            XLSX.writeFile(wb, "file3_vs_file2_comparison.xlsx");
        });
        // Initialize download buttons as disabled
        document.getElementById('download-f3-vs-f2-btn').disabled = true;
        document.getElementById('download-first-module-date-btn').disabled = true;
        document.getElementById('download-m5-vs-f2-btn').disabled = true;
        document.getElementById('download-common-m5-not-y-btn').disabled = true;
// Download M5 (Y) vs File 2 comparison
        document.getElementById('download-m5-vs-f2-btn').addEventListener('click', function() {
            if (!filteredFile3Data || !file2Data) return;

            // Get only records where M5 = "Y" from File 3
            const m5YRecords = filteredFile3Data.filter(row => {
                const m5Value = row['M5'] || row['m5'] || row['M5_STATUS'] || row.m5;
                if (m5Value && typeof m5Value === 'string') {
                    return m5Value.toString().trim().toUpperCase() === 'Y';
                }
                return false;
            });

            // Prepare data for export
            const exportData = [];

            // Add header row
            exportData.push({
                "Type": "Summary",
                "Count": "",
                "Details": "M5 (Y) vs File 2 Comparison Results"
            });

            // Add summary rows
            exportData.push({
                "Type": "M5 = 'Y' Total Records",
                "Count": document.getElementById('m5-y-count').textContent,
                "Details": ""
            });

            exportData.push({
                "Type": "Common Records (CNA in both files)",
                "Count": document.getElementById('m5-vs-f2-common-count').textContent,
                "Details": ""
            });

            exportData.push({
                "Type": "Unique to File 3 (M5=Y CNA only)",
                "Count": document.getElementById('m5-vs-f2-unique-file3-count').textContent,
                "Details": ""
            });

            exportData.push({
                "Type": "Unique to File 2 (Email only)",
                "Count": document.getElementById('m5-vs-f2-unique-file2-count').textContent,
                "Details": ""
            });

            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });

            // Extract CNA from M5 = "Y" File 3 records
            const m5File3CNA = new Set();
            const m5File3DataMap = new Map();

            m5YRecords.forEach(row => {
                const cna = row.cna || row.CNA || row.Cna;
                if (cna && typeof cna === 'string') {
                    const cnaKey = cna.trim().toLowerCase();
                    m5File3CNA.add(cnaKey);
                    m5File3DataMap.set(cnaKey, row);
                }
            });

            // Extract Email from File 2
            const file2Email = new Set();
            const file2DataMap = new Map();

            file2Data.forEach(row => {
                const email = row.email || row.EMAIL || row.Email;
                if (email && typeof email === 'string') {
                    const emailKey = email.trim().toLowerCase();
                    file2Email.add(emailKey);
                    file2DataMap.set(emailKey, row);
                }
            });

            // Calculate intersections and differences
            const m5Common = new Set([...m5File3CNA].filter(cna => file2Email.has(cna)));
            const m5UniqueToFile3 = new Set([...m5File3CNA].filter(cna => !file2Email.has(cna)));
            const m5UniqueToFile2 = new Set([...file2Email].filter(email => !m5File3CNA.has(email)));

            // Add common records
            exportData.push({
                "Type": "Common Records (CNA)",
                "Count": "",
                "Details": ""
            });

            if (m5Common.size === 0) {
                exportData.push({
                    "Type": "No common records found",
                    "Count": "",
                    "Details": ""
                });
            } else {
                m5Common.forEach(record => {
                    exportData.push({
                        "Type": "Common",
                        "Count": "",
                        "Details": record
                    });
                });
            }

            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });

            // Add unique to File 3 records
            exportData.push({
                "Type": "Unique to File 3 (M5=Y CNA)",
                "Count": "",
                "Details": ""
            });

            if (m5UniqueToFile3.size === 0) {
                exportData.push({
                    "Type": "No unique records in File 3",
                    "Count": "",
                    "Details": ""
                });
            } else {
                m5UniqueToFile3.forEach(record => {
                    exportData.push({
                        "Type": "Unique File 3",
                        "Count": "",
                        "Details": record
                    });
                });
            }

            // Add separator
            exportData.push({
                "Type": "",
                "Count": "",
                "Details": ""
            });

            // Add unique to File 2 records
            exportData.push({
                "Type": "Unique to File 2 (Email)",
                "Count": "",
                "Details": ""
            });

            if (m5UniqueToFile2.size === 0) {
                exportData.push({
                    "Type": "No unique records in File 2",
                    "Count": "",
                    "Details": ""
                });
            } else {
                m5UniqueToFile2.forEach(record => {
                    exportData.push({
                        "Type": "Unique File 2",
                        "Count": "",
                        "Details": record
                    });
                });
            }

            // Create worksheet from export data
            const ws = XLSX.utils.json_to_sheet(exportData);

            // Create workbook and add worksheet
            const wb = XLSX.utils.book_new();
            XLSX.utils.book_append_sheet(wb, ws, "M5 (Y) vs File 2 Comparison");

            // Export to file
            XLSX.writeFile(wb, "m5_y_vs_file2_comparison.xlsx");
        });
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        feather.replace();
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