// Course data for 2025-2026
const coursesData = [
    // Q1 2025
    {
        "Course": "MDB100: MongoDB Database and Security",
        "Start Date": "15-Jan-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "John Smith",
        "Location": "Online"
    },
    {
        "Course": "DEV400: MongoDB Developer Extension", 
        "Start Date": "22-Jan-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Sarah Johnson",
        "Location": "Online"
    },
    {
        "Course": "OFA400: Atlas Admin",
        "Start Date": "05-Feb-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Michael Brown",
        "Location": "Online"
    },
    {
        "Course": "DA610: MongoDB Adv. Queries",
        "Start Date": "19-Feb-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Emily Davis",
        "Location": "Online"
    },
    {
        "Course": "OA620: Ops Manager Sizing",
        "Start Date": "05-Mar-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Robert Wilson",
        "Location": "Online"
    },

    // Q2 2025
    {
        "Course": "MDB200: MongoDB Optimization",
        "Start Date": "02-Apr-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "John Smith",
        "Location": "Online"
    },
    {
        "Course": "DEV500: Data Modeling",
        "Start Date": "16-Apr-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Sarah Johnson",
        "Location": "Online"
    },
    {
        "Course": "OFS400: Ops Manager Admin",
        "Start Date": "07-May-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Michael Brown",
        "Location": "Online"
    },
    {
        "Course": "DA620: Languages Drivers",
        "Start Date": "21-May-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Emily Davis",
        "Location": "Online"
    },
    {
        "Course": "OA630: Self-Hosted Security",
        "Start Date": "04-Jun-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Robert Wilson",
        "Location": "Online"
    },

    // Q3 2025
    {
        "Course": "MDB300: Production Readiness",
        "Start Date": "09-Jul-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "John Smith",
        "Location": "Online"
    },
    {
        "Course": "DS110: Atlas Search",
        "Start Date": "23-Jul-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Sarah Johnson",
        "Location": "Online"
    },
    {
        "Course": "OFA500: Atlas API",
        "Start Date": "06-Aug-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Michael Brown",
        "Location": "Online"
    },
    {
        "Course": "DA630: Distributed Systems",
        "Start Date": "20-Aug-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Emily Davis",
        "Location": "Online"
    },
    {
        "Course": "OA640: Atlas Security",
        "Start Date": "03-Sep-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Robert Wilson",
        "Location": "Online"
    },

    // Q4 2025
    {
        "Course": "DS120: Atlas Data Lake",
        "Start Date": "08-Oct-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "John Smith",
        "Location": "Online"
    },
    {
        "Course": "DA640: App Optimization",
        "Start Date": "22-Oct-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Sarah Johnson",
        "Location": "Online"
    },
    {
        "Course": "OFS500: Ops Manager API",
        "Start Date": "05-Nov-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Michael Brown",
        "Location": "Online"
    },
    {
        "Course": "DA650: Advanced Aggregation",
        "Start Date": "19-Nov-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Emily Davis",
        "Location": "Online"
    },
    {
        "Course": "DS130: CSFLE",
        "Start Date": "03-Dec-25",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Robert Wilson",
        "Location": "Online"
    },

    // Q1 2026
    {
        "Course": "MDB100: MongoDB Database and Security",
        "Start Date": "14-Jan-26",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "John Smith",
        "Location": "Online"
    },
    {
        "Course": "DEV400: MongoDB Developer Extension",
        "Start Date": "28-Jan-26",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Sarah Johnson",
        "Location": "Online"
    },
    {
        "Course": "DA660: AI Integration",
        "Start Date": "11-Feb-26",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Michael Brown",
        "Location": "Online"
    },
    {
        "Course": "DA670: Vector Search",
        "Start Date": "25-Feb-26",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Emily Davis",
        "Location": "Online"
    },
    {
        "Course": "OA620: Ops Manager Sizing",
        "Start Date": "11-Mar-26",
        "Time": "09:00 AM - 05:00 PM",
        "Instructor": "Robert Wilson",
        "Location": "Online"
    }
];
// Calendar functionality
let currentMonth = new Date().getMonth();
let currentYear = new Date().getFullYear();

function renderCalendar() {
    const firstDay = new Date(currentYear, currentMonth, 1);
    const lastDay = new Date(currentYear, currentMonth + 1, 0);
    const daysInMonth = lastDay.getDate();
    let startingDay = firstDay.getDay();
    // Adjust to make Monday (1) the first day of week instead of Sunday (0)
    startingDay = startingDay === 0 ? 6 : startingDay - 1;
// Update month display
    const monthNames = ['January', 'February', 'March', 'April', 'May', 'June',
                       'July', 'August', 'September', 'October', 'November', 'December'];
    document.getElementById('current-month-display').textContent = 
        `${monthNames[currentMonth]} ${currentYear}`;
    
    // Clear previous calendar
    const calendarDays = document.getElementById('calendar-days');
    calendarDays.innerHTML = '';
    
    // Add empty cells for days before the first day of month
    for (let i = 0; i < startingDay; i++) {
        const cell = document.createElement('div');
        cell.className = 'bg-white h-24 p-1';
        calendarDays.appendChild(cell);
    }
    
    // Add days of month
    for (let day = 1; day <= daysInMonth; day++) {
        const cell = document.createElement('div');
        cell.className = 'bg-white h-24 p-1 overflow-auto';
        
        const date = new Date(currentYear, currentMonth, day);
        const dateStr = date.toLocaleDateString('en-US', { day: '2-digit', month: 'short', year: 'numeric' });
        
        // Add day number
        const dayNumber = document.createElement('div');
        dayNumber.className = 'font-semibold text-sm mb-1';
        dayNumber.textContent = day;
        cell.appendChild(dayNumber);
        
        // Add courses for this day
        const coursesToday = coursesData.filter(course => {
            const courseDate = new Date(course['Start Date']);
            return courseDate.getDate() === day && 
                   courseDate.getMonth() === currentMonth && 
                   courseDate.getFullYear() === currentYear;
        });
        
        coursesToday.forEach(course => {
            const courseEl = document.createElement('div');
            courseEl.className = 'text-xs p-1 mb-1 rounded bg-blue-50 border-l-4 border-blue-500 truncate';
            courseEl.title = `${course.Course}\n${course.Time}\n${course.Instructor}`;
            courseEl.textContent = course.Course;
            cell.appendChild(courseEl);
        });
        
        calendarDays.appendChild(cell);
    }
}
// Close dropdowns when clicking outside
document.addEventListener('click', function(event) {
    if (!event.target.matches('.dropdown-btn')) {
        const dropdowns = document.querySelectorAll('.dropdown-content');
        dropdowns.forEach(dropdown => {
            if (dropdown.classList.contains('show')) {
                dropdown.classList.remove('show');
            }
        });
    }
});
// Initialize the page
document.addEventListener('DOMContentLoaded', () => {
    // Set initial view to current month
    const now = new Date();
    currentMonth = now.getMonth();
    currentYear = now.getFullYear();
    
    renderCalendar();
    renderUpcomingDates();
// Month navigation
    document.getElementById('prev-month').addEventListener('click', () => {
        currentMonth--;
        if (currentMonth < 0) {
            currentMonth = 11;
            currentYear--;
        }
        renderCalendar();
        feather.replace();
    });
    
    document.getElementById('next-month').addEventListener('click', () => {
        currentMonth++;
        if (currentMonth > 11) {
            currentMonth = 0;
            currentYear++;
        }
        renderCalendar();
        feather.replace();
    });
});
// Helper function to parse date strings
function parseDate(dateStr) {
    const parts = dateStr.split('-');
    const day = parseInt(parts[0]);
    const monthNames = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'];
    const month = monthNames.indexOf(parts[1]);
    const year = parseInt(parts[2]) + 2000;
    return new Date(year, month, day);
}
// Group courses by month
function groupCoursesByMonth(courses) {
    const now = new Date();
    const currentMonth = now.getMonth();
    const currentYear = now.getFullYear();
    
    const grouped = {
        current: [],
        next: [],
        following: []
    };

    courses.forEach(course => {
        const courseDate = parseDate(course['Start Date']);
        const courseMonth = courseDate.getMonth();
        const courseYear = courseDate.getFullYear();
        
        if (courseYear === currentYear || courseYear === currentYear + 1) {
            if (courseMonth === currentMonth && courseYear === currentYear) {
                grouped.current.push(course);
            } else if (
                (courseMonth === currentMonth + 1 && courseYear === currentYear) ||
                (currentMonth === 11 && courseMonth === 0 && courseYear === currentYear + 1)
            ) {
                grouped.next.push(course);
            } else if (
                (courseMonth === currentMonth + 2 && courseYear === currentYear) ||
                (currentMonth === 10 && courseMonth === 0 && courseYear === currentYear + 1) ||
                (currentMonth === 11 && courseMonth === 1 && courseYear === currentYear + 1)
            ) {
                grouped.following.push(course);
            }
        }
    });

    return grouped;
}
// Render courses to the DOM
function renderCourses(courses, containerId) {
    const container = document.getElementById(containerId);
    container.innerHTML = '';
    
    if (courses.length === 0) {
        container.innerHTML = '<p class="text-gray-600">No courses scheduled for this period.</p>';
        return;
    }
    
    courses.forEach(course => {
        const card = document.createElement('custom-course-card');
        card.setAttribute('title', course.Course);
        card.setAttribute('date', parseDate(course['Start Date']).toLocaleDateString('en-US', { 
            month: 'short', 
            day: 'numeric', 
            year: 'numeric' 
        }));
        card.setAttribute('time', course.Time);
        card.setAttribute('location', course.Location);
        card.setAttribute('link', '#');
        container.appendChild(card);
    });
}
// Render upcoming dates list
function renderUpcomingDates() {
    const upcomingDatesList = document.getElementById('upcoming-dates-list');
    upcomingDatesList.innerHTML = '';

    // Sort courses by date
    const sortedCourses = [...coursesData].sort((a, b) => {
        return new Date(a['Start Date']) - new Date(b['Start Date']);
    });

    // Get next 10 upcoming courses
    const now = new Date();
    const upcomingCourses = sortedCourses.filter(course => {
        return new Date(course['Start Date']) >= now;
    }).slice(0, 10);

    if (upcomingCourses.length === 0) {
        upcomingDatesList.innerHTML = '<p class="text-gray-600">No upcoming courses scheduled.</p>';
        return;
    }

    upcomingCourses.forEach(course => {
        const date = new Date(course['Start Date']);
        const dateItem = document.createElement('div');
        dateItem.className = 'flex items-start border-b border-gray-100 pb-4 last:border-0 last:pb-0';
        dateItem.innerHTML = `
            <div class="bg-green-100 rounded-lg p-2 mr-4 flex-shrink-0">
                <div class="text-green-800 font-bold text-center text-sm">${date.toLocaleDateString('en-US', { month: 'short' })}</div>
                <div class="text-green-800 font-bold text-center text-xl">${date.getDate()}</div>
            </div>
            <div>
                <h4 class="font-medium text-gray-800">${course.Course}</h4>
                <p class="text-sm text-gray-600">${course.Time} • ${course.Location}</p>
                <p class="text-sm text-gray-500 mt-1">Instructor: ${course.Instructor}</p>
            </div>
        `;
        upcomingDatesList.appendChild(dateItem);
    });
}

// Initialize the page
function init() {
    const groupedCourses = groupCoursesByMonth(coursesData);
    
    renderCourses(groupedCourses.current, 'current-month-courses');
    renderCourses(groupedCourses.next, 'next-month-courses');
    renderCourses(groupedCourses.following, 'following-month-courses');
    
    // Update month selector labels with actual month names
    const now = new Date();
    const monthNames = ['January', 'February', 'March', 'April', 'May', 'June',
                       'July', 'August', 'September', 'October', 'November', 'December'];
    
    const buttons = document.querySelectorAll('.month-btn');
    buttons[0].textContent = monthNames[now.getMonth()];
    buttons[1].textContent = monthNames[(now.getMonth() + 1) % 12];
    buttons[2].textContent = monthNames[(now.getMonth() + 2) % 12];
}
init();