{% extends "base.html" %}

{% block title %}Splicing Prediction - {{ settings.app_name }}{% endblock %}

{% block content %}
<div class="max-w-4xl mx-auto py-8 px-4 sm:px-6 lg:px-8">
    <!-- Hero Section -->
    <div class="text-center mb-8">
        <h1 class="text-3xl font-bold text-gray-900 sm:text-4xl">
            RNA Splicing Predictor
        </h1>
    </div>

    <!-- Token Display Section -->
    <div class="bg-blue-50 border border-blue-200 rounded-lg p-4 mb-6">
        <div class="flex items-center gap-2">
            <span class="relative group text-sm font-medium text-blue-900 cursor-help underline decoration-dotted underline-offset-2">
                Access Token:
                <div class="absolute left-full top-1/2 -translate-y-1/2 ml-2 hidden group-hover:block w-64 p-3 bg-gray-900 text-white text-xs rounded-lg shadow-lg z-50 font-normal no-underline">
                    <p>This unique token identifies jobs. Save it to access job history from any device or browser.</p>
                    <p class="mt-2 text-gray-300">Double-click the token to edit it.</p>
                    <div class="absolute right-full top-1/2 -translate-y-1/2 w-0 h-0 border-t-8 border-b-8 border-r-8 border-transparent border-r-gray-900"></div>
                </div>
            </span>
            <code id="token-display" class="bg-white px-3 py-1 rounded border border-blue-200 text-sm font-mono text-blue-800"></code>
        </div>
    </div>

    <!-- Prediction Form -->
    <div class="bg-white rounded-lg shadow-sm border border-gray-200 p-6">
        <form id="predict-form">
            <!-- Job Title -->
            <div class="mb-4">
                <label for="job-title" class="block text-sm text-gray-700 mb-2">
                    <span class="relative group font-medium cursor-help underline decoration-dotted underline-offset-2">
                        Job Title
                        <div class="absolute left-full top-1/2 -translate-y-1/2 ml-2 hidden group-hover:block w-64 p-3 bg-gray-900 text-white text-xs rounded-lg shadow-lg z-50 font-normal no-underline">
                            <p>Give the prediction job a memorable name to easily find it later in job history.</p>
                            <p class="mt-2 text-gray-300">If left empty, a name will be auto-generated (e.g., "2026-01-15_abc12").</p>
                            <div class="absolute right-full top-1/2 -translate-y-1/2 w-0 h-0 border-t-8 border-b-8 border-r-8 border-transparent border-r-gray-900"></div>
                        </div>
                    </span>
                    <span class="text-gray-400 font-normal">(optional)</span>
                </label>
                <input type="text" id="job-title" name="job_title"
                       class="block w-full rounded-md border-gray-300 shadow-sm focus:border-primary-500 focus:ring-primary-500 text-sm p-2 border"
                       placeholder="e.g., BRCA1 Exon Analysis">
            </div>

            <!-- Sequence Input -->
            <div class="mb-4">
                <label for="sequences" class="block text-sm text-gray-700 mb-2">
                    <span class="relative group font-medium cursor-help underline decoration-dotted underline-offset-2">
                        Sequence(s)
                        <div class="absolute left-full top-1/2 -translate-y-1/2 ml-2 hidden group-hover:block w-72 p-3 bg-gray-900 text-white text-xs rounded-lg shadow-lg z-50 font-normal no-underline">
                            <p class="font-semibold mb-1">How to enter sequences:</p>
                            <ul class="list-disc list-inside space-y-1">
                                <li><strong>Single sequence:</strong> Paste a 70-nucleotide sequence directly</li>
                                <li><strong>Multiple (FASTA):</strong> Use &gt;name on one line, sequence on next</li>
                                <li><strong>Multiple (plain):</strong> One sequence per line</li>
                            </ul>
                            <p class="mt-2 text-gray-300">Only A, C, G, T, U characters allowed. Each sequence must be exactly 70 nucleotides.</p>
                            <div class="absolute right-full top-1/2 -translate-y-1/2 w-0 h-0 border-t-8 border-b-8 border-r-8 border-transparent border-r-gray-900"></div>
                        </div>
                    </span>
                    <span class="text-gray-400 font-normal">(70nt each, A/C/G/T/U, max 100)</span>
                </label>
                <textarea id="sequences" name="sequences" rows="8"
                          class="block w-full rounded-md border-gray-300 shadow-sm font-mono text-sm p-3 border focus:border-primary-500 focus:ring-primary-500"
                          placeholder="Paste one or more sequences:

Single sequence:
GGTAGTACGCCAATTCGCCGGTGCCGCGAGCCAGAGGCTACCAAAACTTGACAAGCCTACATATACTACT

Multiple sequences (FASTA format):
>Gene1_Exon5
GGTAGTACGCCAATTCGCCGGTGCCGCGAGCCAGAGGCTACCAAAACTTGACAAGCCTACATATACTACT
>Gene2_Exon3
CTACCACCTCCCAAGCTTACACACTGTTTGATGAAAGGTCGCCACAACGTTCCCTCACCCCTAGTCTCGC

Or plain sequences (one per line):
GGTAGTACGCCAATTCGCCGGTGCCGCGAGCCAGAGGCTACCAAAACTTGACAAGCCTACATATACTACT
CTACCACCTCCCAAGCTTACACACTGTTTGATGAAAGGTCGCCACAACGTTCCCTCACCCCTAGTCTCGC"></textarea>
                <div class="mt-2 flex justify-between items-center">
                    <span id="sequence-count" class="text-sm text-gray-500">0 sequences detected</span>
                    <span id="validation-message" class="text-sm text-red-500 hidden"></span>
                </div>
            </div>

            <!-- File Upload -->
            <div class="mb-6">
                <label class="block text-sm text-gray-700 mb-2">
                    <span class="relative group font-medium cursor-help underline decoration-dotted underline-offset-2">
                        Or Upload File
                        <div class="absolute left-full top-1/2 -translate-y-1/2 ml-2 hidden group-hover:block w-72 p-3 bg-gray-900 text-white text-xs rounded-lg shadow-lg z-50 font-normal no-underline">
                            <p class="font-semibold mb-1">Supported file formats:</p>
                            <ul class="list-disc list-inside space-y-1">
                                <li><strong>CSV:</strong> 1 column (sequences only) or 2 columns (name, sequence)</li>
                                <li><strong>FASTA:</strong> Standard format with &gt;header lines</li>
                            </ul>
                            <p class="mt-2 text-gray-300">Delimiters (comma, semicolon, tab) and headers are auto-detected.</p>
                            <div class="absolute right-full top-1/2 -translate-y-1/2 w-0 h-0 border-t-8 border-b-8 border-r-8 border-transparent border-r-gray-900"></div>
                        </div>
                    </span>
                    <span class="text-gray-400 font-normal">(CSV or FASTA)</span>
                </label>
                <div class="flex items-center gap-4">
                    <input type="file" id="file-upload" accept=".csv,.fasta,.fa,.fna,.txt,.tsv"
                           class="block w-full text-sm text-gray-500 file:mr-4 file:py-2 file:px-4 file:rounded-md file:border-0 file:text-sm file:font-medium file:bg-primary-50 file:text-primary-700 hover:file:bg-primary-100 cursor-pointer">
                    <button type="button" id="clear-file-btn" class="text-gray-400 hover:text-gray-600 hidden">
                        <svg class="w-5 h-5" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
                        </svg>
                    </button>
                </div>
                <p id="file-status" class="mt-1 text-sm text-gray-500"></p>
            </div>

            <!-- Action Buttons -->
            <div class="flex flex-wrap gap-3">
                <button type="submit" id="submit-btn"
                        class="inline-flex items-center px-4 py-2 border border-transparent text-sm font-medium rounded-md shadow-sm text-white bg-primary-600 hover:bg-primary-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500 disabled:opacity-50 disabled:cursor-not-allowed">
                    <svg class="hidden animate-spin -ml-1 mr-2 h-4 w-4 text-white" id="loading-spinner" fill="none" viewBox="0 0 24 24">
                        <circle class="opacity-25" cx="12" cy="12" r="10" stroke="currentColor" stroke-width="4"></circle>
                        <path class="opacity-75" fill="currentColor" d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4zm2 5.291A7.962 7.962 0 014 12H0c0 3.042 1.135 5.824 3 7.938l3-2.647z"></path>
                    </svg>
                    <span id="submit-text">Predict PSI</span>
                </button>
                <button type="button" id="example-btn"
                        class="inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500">
                    <svg class="mr-2 h-4 w-4 text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                    </svg>
                    Try Example
                </button>
                <button type="button" id="clear-btn"
                        class="inline-flex items-center px-4 py-2 border border-gray-300 text-sm font-medium rounded-md text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-primary-500">
                    <svg class="mr-2 h-4 w-4 text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
                    </svg>
                    Clear
                </button>
            </div>
        </form>

        <!-- Error message -->
        <div id="error-message" class="hidden mt-4 p-4 bg-red-50 border border-red-200 rounded-md">
            <div class="flex">
                <svg class="h-5 w-5 text-red-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                    <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 8v4m0 4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
                </svg>
                <p class="ml-3 text-sm text-red-700" id="error-text"></p>
            </div>
        </div>
    </div>

</div>
{% endblock %}

{% block scripts %}
<script src="/static/js/token.js"></script>
<script src="/static/js/file-parser.js"></script>
<script>
// Example sequences
const EXAMPLES = [
    {
        name: "High Inclusion",
        sequence: "GGTAGTACGCCAATTCGCCGGTGCCGCGAGCCAGAGGCTACCAAAACTTGACAAGCCTACATATACTACT",
        expectedPsi: "~0.98"
    },
    {
        name: "Balanced",
        sequence: "CTACCACCTCCCAAGCTTACACACTGTTTGATGAAAGGTCGCCACAACGTTCCCTCACCCCTAGTCTCGC",
        expectedPsi: "~0.49"
    },
    {
        name: "High Skipping",
        sequence: "ACACTCCGCAGCACACTCGGCAAAGAAGTTAGGCCCCGCTCTTACAAACATCTAGCATTTTGTATGGTCT",
        expectedPsi: "~0.00"
    }
];

// DOM Elements
const form = document.getElementById('predict-form');
const sequencesInput = document.getElementById('sequences');
const jobTitleInput = document.getElementById('job-title');
const sequenceCount = document.getElementById('sequence-count');
const validationMessage = document.getElementById('validation-message');
const submitBtn = document.getElementById('submit-btn');
const submitText = document.getElementById('submit-text');
const loadingSpinner = document.getElementById('loading-spinner');
const errorMessage = document.getElementById('error-message');
const errorText = document.getElementById('error-text');
const exampleBtn = document.getElementById('example-btn');
const clearBtn = document.getElementById('clear-btn');
const fileUpload = document.getElementById('file-upload');
const clearFileBtn = document.getElementById('clear-file-btn');
const fileStatus = document.getElementById('file-status');

let currentExampleIndex = 0;
let parsedSequences = [];

// Initialize token display
document.addEventListener('DOMContentLoaded', () => {
    TokenManager.initTokenDisplay();
    updateSequenceCount();
});

/**
 * Update sequence count and validation
 */
function updateSequenceCount() {
    const text = sequencesInput.value;
    if (!text.trim()) {
        sequenceCount.textContent = '0 sequences detected';
        sequenceCount.className = 'text-sm text-gray-500';
        parsedSequences = [];
        updateSubmitButton();
        return;
    }

    const result = FileParser.parseAndValidate(text, 70);
    parsedSequences = result.sequences;

    if (parsedSequences.length === 0) {
        sequenceCount.textContent = '0 sequences detected';
        sequenceCount.className = 'text-sm text-gray-500';
    } else if (parsedSequences.length === 1) {
        if (result.validCount === 1) {
            sequenceCount.textContent = '1 valid sequence';
            sequenceCount.className = 'text-sm text-green-600';
        } else {
            sequenceCount.textContent = '1 sequence (invalid)';
            sequenceCount.className = 'text-sm text-red-600';
        }
    } else {
        if (result.invalidCount === 0) {
            sequenceCount.textContent = `${parsedSequences.length} valid sequences`;
            sequenceCount.className = 'text-sm text-green-600';
        } else {
            sequenceCount.textContent = `${parsedSequences.length} sequences (${result.validCount} valid, ${result.invalidCount} invalid)`;
            sequenceCount.className = 'text-sm text-yellow-600';
        }
    }

    updateSubmitButton();
}

/**
 * Update submit button state
 */
function updateSubmitButton() {
    // Enable if we have at least one sequence (valid or not - backend will handle)
    submitBtn.disabled = parsedSequences.length === 0;
}

/**
 * Show loading state
 */
function setLoading(loading) {
    if (loading) {
        submitBtn.disabled = true;
        submitText.textContent = 'Processing...';
        loadingSpinner.classList.remove('hidden');
    } else {
        updateSubmitButton();
        submitText.textContent = 'Predict PSI';
        loadingSpinner.classList.add('hidden');
    }
}

/**
 * Show error message
 */
function showError(message) {
    errorText.textContent = message;
    errorMessage.classList.remove('hidden');
}

/**
 * Hide error message
 */
function hideError() {
    errorMessage.classList.add('hidden');
}

/**
 * Load an example sequence
 */
function loadExample(index) {
    const example = EXAMPLES[index];
    sequencesInput.value = `>${example.name}\n${example.sequence}`;
    updateSequenceCount();
    hideError();
}

/**
 * Handle file upload
 */
async function handleFileUpload(event) {
    const file = event.target.files[0];
    if (!file) return;

    try {
        fileStatus.textContent = 'Parsing file...';
        const sequences = await FileParser.parseFile(file);

        if (sequences.length === 0) {
            fileStatus.textContent = 'No sequences found in file';
            fileStatus.className = 'mt-1 text-sm text-red-500';
            return;
        }

        // Convert to FASTA format and put in textarea
        const fastaText = sequences.map(s => `>${s.name}\n${s.sequence}`).join('\n');
        sequencesInput.value = fastaText;
        updateSequenceCount();

        fileStatus.textContent = '';
        clearFileBtn.classList.remove('hidden');
        hideError();

    } catch (error) {
        fileStatus.textContent = `Error: ${error.message}`;
        fileStatus.className = 'mt-1 text-sm text-red-500';
    }
}

/**
 * Clear file input
 */
function clearFileInput() {
    fileUpload.value = '';
    fileStatus.textContent = '';
    clearFileBtn.classList.add('hidden');
}

/**
 * Submit the prediction
 */
async function submitPrediction(event) {
    event.preventDefault();

    if (parsedSequences.length === 0) {
        showError('Please enter at least one sequence');
        return;
    }

    setLoading(true);
    hideError();

    const token = TokenManager.getOrCreateToken();
    const jobTitle = jobTitleInput.value.trim() || null;

    try {
        let response;
        let result;

        if (parsedSequences.length === 1) {
            // Single sequence prediction
            const seq = parsedSequences[0];
            response = await fetch('/api/predict', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    sequence: seq.sequence,
                    name: seq.name,
                    access_token: token,
                    job_title: jobTitle
                })
            });
        } else {
            // Batch prediction
            const sequences = parsedSequences.map(s => ({
                name: s.name,
                sequence: s.sequence
            }));
            response = await fetch('/api/batch', {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    sequences: sequences,
                    access_token: token,
                    job_title: jobTitle
                })
            });
        }

        if (!response.ok) {
            const error = await response.json();
            throw new Error(error.detail || 'Prediction failed');
        }

        result = await response.json();

        // Redirect to result page
        window.location.href = `/result/${result.job_id}`;

    } catch (error) {
        console.error('Prediction error:', error);
        showError(error.message || 'An error occurred. Please try again.');
        setLoading(false);
    }
}

// Event listeners
if (form) {
    form.addEventListener('submit', submitPrediction);
}

if (sequencesInput) {
    sequencesInput.addEventListener('input', updateSequenceCount);
}

if (exampleBtn) {
    exampleBtn.addEventListener('click', () => {
        loadExample(currentExampleIndex);
        currentExampleIndex = (currentExampleIndex + 1) % EXAMPLES.length;
    });
}

if (clearBtn) {
    clearBtn.addEventListener('click', () => {
        sequencesInput.value = '';
        jobTitleInput.value = '';
        updateSequenceCount();
        clearFileInput();
        hideError();
    });
}

if (fileUpload) {
    fileUpload.addEventListener('change', handleFileUpload);
}

if (clearFileBtn) {
    clearFileBtn.addEventListener('click', clearFileInput);
}

// Make loadExample available globally for onclick handlers
window.loadExample = loadExample;
</script>
{% endblock %}