import { initMultiSelect } from '../utils.js';

export function initAuditoriumWorkload() {
    // Initialize date input with current date
    const dateInput = document.getElementById('workload-date');
    if (dateInput) {
        const today = new Date();
        const yyyy = today.getFullYear();
        const mm = String(today.getMonth() + 1).padStart(2, '0');
        const dd = String(today.getDate()).padStart(2, '0');
        dateInput.value = `${yyyy}-${mm}-${dd}`;
    }

    // Initialize Multi-Selects
    initMultiSelect('building-box', 'building-menu', 'building-text', 'building-checkboxes');
    initMultiSelect('capacity-box', 'capacity-menu', 'capacity-text', 'capacity-checkboxes');
    initMultiSelect('equipment-box', 'equipment-menu', 'equipment-text', 'equipment-checkboxes');

    // Populate Filters with Mock/Initial Data
    populateFilters();

    // Render Mock Data for the Grid based on the UI requested layout
    renderMockGrid();
}

function populateFilters() {
    // Buildings
    const buildingsContainer = document.getElementById('building-checkboxes');
    const buildings = [
        { id: 1, name: "Корпус 1 (Главный)" },
        { id: 2, name: "Корпус 2 (Физ-мат)" },
        { id: 3, name: "Корпус 3 (Гуманитарный)" }
    ];
    buildingsContainer.innerHTML = buildings.map(item => `
        <label class="checkbox-item">
            <input type="checkbox" value="${item.id}">
            <span class="checkmark"></span>
            <span class="checkbox-label">${item.name}</span>
        </label>
    `).join('');

    // Capacities
    const capacityContainer = document.getElementById('capacity-checkboxes');
    const capacities = [
        { id: 'small', name: "До 30 мест" },
        { id: 'medium', name: "30 - 60 мест" },
        { id: 'large', name: "60 - 100 мест" },
        { id: 'xlarge', name: "Более 100 мест" }
    ];
    capacityContainer.innerHTML = capacities.map(item => `
        <label class="checkbox-item">
            <input type="checkbox" value="${item.id}">
            <span class="checkmark"></span>
            <span class="checkbox-label">${item.name}</span>
        </label>
    `).join('');

    // Equipment
    const equipmentContainer = document.getElementById('equipment-checkboxes');
    const equipmentList = [
        { id: 1, name: "Проектор" },
        { id: 2, name: "Компьютерные места" },
        { id: 3, name: "Интерактивная доска" },
        { id: 4, name: "Микрофон" }
    ];
    equipmentContainer.innerHTML = equipmentList.map(item => `
        <label class="checkbox-item">
            <input type="checkbox" value="${item.id}">
            <span class="checkmark"></span>
            <span class="checkbox-label">${item.name}</span>
        </label>
    `).join('');
}

function renderMockGrid() {
    // In future this will be loaded from API
    const timeslots = [
        "8:00-9:30",
        "9:40-11:10",
        "11:40-13:10",
        "13:20-14:50",
        "15:00-16:30",
        "16:50-18:20",
        "18:30-19:50",
        "20:00-21:20"
    ];

    const auditoriums = [
        "201", "202", "204", "205", "206", "207", "208"
    ];

    // Mock schedule data mapped by room and time
    // Key: "roomId_timeSlotId", Value: Lesson object
    const mockSchedule = {
        "201_8:00-9:30": { subject: "Физика", group: "ИБ-41м", teacher: "Атлетов А.Р." },
        "201_9:40-11:10": { subject: "Физика", group: "ИВТ-21-1", teacher: "Атлетов А.Р." },
        "201_11:40-13:10": { subject: "Физика", group: "ИБ-41м", teacher: "Физик В.Г." },
        "201_13:20-14:50": { subject: "Физика", group: "ИБ-41м", teacher: "Физик В.Г." },
        
        "202_9:40-11:10": { subject: "Химия", group: "ИВТ-21-1", teacher: "Химоза Я.В." },
        "202_13:20-14:50": { subject: "Математика", group: "ИВТ-21-1", teacher: "Рутина Л.П." },
        "202_15:00-16:30": { subject: "Химия", group: "ИВТ-21-1", teacher: "Химоза Я.В." },
        "202_16:50-18:20": { subject: "Физика", group: "ИВТ-21-1", teacher: "Атлетов А.Р." },

        "205_9:40-11:10": { subject: "Организация аудита ИБ", group: "ИБ-41м", teacher: "Таныгин М.О." },
    };

    // Render Headers
    const headerRow = document.getElementById('workload-header-row');
    // Start after the first fixed cell (which is already in HTML)
    
    auditoriums.forEach(room => {
        const th = document.createElement('th');
        th.textContent = room;
        headerRow.appendChild(th);
    });

    // Render Body Rows
    const tbody = document.getElementById('workload-tbody');
    
    timeslots.forEach((time) => {
        const tr = document.createElement('tr');
        
        // Add Time Cell
        const tdTime = document.createElement('td');
        tdTime.className = 'time-cell';
        tdTime.textContent = time;
        tr.appendChild(tdTime);

        // Add Room Cells for this Time
        auditoriums.forEach(room => {
            const td = document.createElement('td');
            
            const scheduleKey = `${room}_${time}`;
            const lesson = mockSchedule[scheduleKey];
            
            if (lesson) {
                // Render lesson card
                td.innerHTML = `
                    <div class="lesson-card">
                        <div class="lesson-subject">${lesson.subject}</div>
                        <div class="lesson-group">${lesson.group}</div>
                        <div class="lesson-teacher">${lesson.teacher}</div>
                    </div>
                `;
            }
            
            tr.appendChild(td);
        });

        tbody.appendChild(tr);
    });
}