@extends('layouts.dashboard.superadminapp')

@section('title', 'GanttChart Calendar')

@section('content')
    @if (session('success'))
        <div class="alert alert-success mb-3">{{ session('success') }}</div>
    @endif
    @if (session('error'))
        <div class="alert alert-danger mb-3">{{ session('error') }}</div>
    @endif
    @if ($errors->any())
        <div class="alert alert-danger mb-3">
            <ul class="mb-0">
                @foreach ($errors->all() as $error)
                    <li>{{ $error }}</li>
                @endforeach
            </ul>
        </div>
    @endif

    <!-- Page Heading -->
    <div class="card mb-4">
        <div class="card-body d-flex flex-column flex-md-row align-items-center justify-content-between">
            <h1 class="h5 mb-0 text-gray-800">UEPL / GanttChart Calendar</h1>
            <div class="d-flex align-items-center">
                <div class="mr-3">
                    <span id="day">day</span>,
                    <span id="daynum">00</span>
                    <span id="month">month</span>
                    <span id="year">0000</span>
                </div>
                <div id="display-time"></div>
            </div>
        </div>
    </div>

    <!-- Main Content -->
    <div class="container-fluid">
        <h1 class="h3 mb-4 text-gray-800">Gantt Chart Calendar View</h1>

        <!-- Control Panel -->
        <div class="card mb-4">
            <div class="card-body">
                <div class="row align-items-center">
                    <div class="col-md-3 mb-3 mb-md-0">
                        <div class="d-flex align-items-center">
                            <label for="main-selector" class="mb-0 mr-2">Select by:</label>
                            <select id="main-selector" class="form-control form-control-sm">
                                <option value="company">Company</option>
                                <option value="machine">Machine</option>
                                <option value="operator">Operator</option>
                            </select>
                        </div>
                    </div>

                    <div class="col-md-3 mb-3 mb-md-0">
                        <select id="company-dropdown" class="form-control form-control-sm dropdown">
                            <option value="">Select Company</option>
                            @foreach ($companies as $company)
                                <option value="{{ $company->id }}">{{ $company->company }}</option>
                            @endforeach
                        </select>
                        <select id="machine-dropdown" class="form-control form-control-sm dropdown d-none">
                            <option value="">Select Machine</option>
                            @foreach ($machines as $machine)
                                <option value="{{ $machine->id }}">{{ $machine->machine_name }}</option>
                            @endforeach
                        </select>
                        <select id="operator-dropdown" class="form-control form-control-sm dropdown d-none">
                            <option value="">Select Operator</option>
                            @foreach ($operators as $operator)
                                <option value="{{ $operator->id }}">{{ $operator->name }}</option>
                            @endforeach
                        </select>
                    </div>

                    <div class="col-md-3 mb-3 mb-md-0">
                        <div class="btn-group btn-group-sm">
                            <button class="view-btn btn btn-primary" data-view="day">Day</button>
                            <button class="view-btn btn btn-outline-secondary" data-view="week">Week</button>
                            <button class="view-btn btn btn-outline-secondary" data-view="month">Month</button>
                            <button class="view-btn btn btn-outline-secondary" data-view="year">Year</button>
                        </div>
                    </div>

                    <div class="col-md-3">
                        <div class="d-flex align-items-center">
                            <button id="prev-btn" class="btn btn-outline-secondary btn-sm mr-2">
                                <i class="fas fa-chevron-left"></i>
                            </button>
                            <span id="current-date-range" class="font-weight-bold mx-2"
                                style="min-width: 180px; text-align: center;">{{ date('F j, Y') }}</span>
                            <button id="next-btn" class="btn btn-outline-secondary btn-sm mr-2">
                                <i class="fas fa-chevron-right"></i>
                            </button>
                            <button id="today-btn" class="btn btn-outline-secondary btn-sm">Today</button>
                        </div>
                    </div>
                </div>
            </div>
        </div>

        <!-- Project Tabs -->
        <div class="card mb-4">
            <div class="card-header bg-primary text-white d-flex justify-content-between align-items-center">
                <h3 class="h6 mb-0">Projects</h3>
                <button id="expand-tabs" class="btn btn-sm btn-light">+</button>
            </div>
            <div class="card-body">
                <div class="tabs-container d-flex flex-wrap gap-2">
                    @foreach ($routeCards as $routeCard)
                        @foreach ($routeCard->processes as $process)
                            <button class="btn btn-sm m-1 project-tab" 
                                    data-project-id="{{ $routeCard->id }}"
                                    data-process-id="{{ $process->id }}"
                                    style="background-color: {{ $routeCard->color }}; color: white;">
                                {{ $routeCard->company_name }} - {{ $process->name }}
                            </button>
                        @endforeach
                    @endforeach
                </div>
            </div>
        </div>

        <!-- Gantt Chart Container -->
        <div class="card">
            <div class="card-header bg-primary text-white d-flex">
                <div class="gantt-header-label">Process / Project</div>
                <!-- Timeline headers will be generated by JavaScript -->
            </div>
            <div class="card-body p-0">
                <div class="gantt-body">
                    <!-- Gantt rows will be generated by JavaScript -->
                </div>
            </div>
        </div>
    </div>

    <!-- Tooltip -->
    <div id="tooltip" class="tooltip position-absolute bg-white border rounded shadow p-3"
        style="display: none; z-index: 1000; max-width: 300px;"></div>

    <style>
        .gantt-container {
            overflow-x: auto;
            width: 100%;
        }
        .gantt-header {
            display: flex;
            min-width: fit-content;
            background: #f8f9fa;
            border-bottom: 1px solid #dee2e6;
        }
        .gantt-header-label {
            min-width: 200px;
            max-width: 300px;
            padding: 8px 12px;
            font-weight: bold;
            border-right: 1px solid #dee2e6;
        }
        .gantt-header-cell {
            min-width: 60px;
            padding: 8px;
            text-align: center;
            border-right: 1px solid #dee2e6;
        }
        .gantt-row {
            display: flex;
            min-width: fit-content;
            border-bottom: 1px solid #dee2e6;
        }
        .gantt-row-label {
            min-width: 200px;
            max-width: 300px;
            padding: 8px 12px;
            border-right: 1px solid #dee2e6;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .gantt-row-cell {
            min-width: 60px;
            height: 40px;
            border-right: 1px solid #dee2e6;
            position: relative;
        }
        .gantt-bar {
            position: absolute;
            height: 24px;
            top: 8px;
            border-radius: 4px;
            color: white;
            font-size: 12px;
            padding: 2px 4px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            cursor: pointer;
            z-index: 1;
        }
        .gantt-bar:hover {
            z-index: 2;
            box-shadow: 0 0 5px rgba(0,0,0,0.5);
        }
        .today-marker {
            position: absolute;
            width: 2px;
            background-color: red;
            height: 100%;
            z-index: 3;
        }
    </style>
@endsection

@section('scripts')
<script>
document.addEventListener('DOMContentLoaded', function() {
    // Configuration
    const DAY_VIEW = 'day';
    const WEEK_VIEW = 'week';
    const MONTH_VIEW = 'month';
    const YEAR_VIEW = 'year';
    
    // DOM Elements
    const mainSelector = document.getElementById('main-selector');
    const companyDropdown = document.getElementById('company-dropdown');
    const machineDropdown = document.getElementById('machine-dropdown');
    const operatorDropdown = document.getElementById('operator-dropdown');
    const viewButtons = document.querySelectorAll('.view-btn');
    const prevBtn = document.getElementById('prev-btn');
    const nextBtn = document.getElementById('next-btn');
    const todayBtn = document.getElementById('today-btn');
    const currentDateRange = document.getElementById('current-date-range');
    const tabsContainer = document.querySelector('.tabs-container');
    const ganttHeader = document.querySelector('.card-header.bg-primary.d-flex');
    const ganttBody = document.querySelector('.gantt-body');
    const tooltip = document.getElementById('tooltip');
    const expandTabsBtn = document.getElementById('expand-tabs');
    const projectTabs = document.querySelectorAll('.project-tab');

    // State
    let currentView = DAY_VIEW;
    let currentDate = new Date();
    let selectedCompany = null;
    let selectedMachine = null;
    let selectedOperator = null;
    let selectedTab = null;
    
    // Initialize
    initEventListeners();
    updateGanttChart();
    
    function initEventListeners() {
        // Main selector change
        mainSelector.addEventListener('change', function() {
            document.querySelectorAll('.dropdown').forEach(d => d.classList.add('d-none'));
            if (this.value === 'company') {
                companyDropdown.classList.remove('d-none');
                companyDropdown.value = '';
                selectedCompany = null;
            } else if (this.value === 'machine') {
                machineDropdown.classList.remove('d-none');
                machineDropdown.value = '';
                selectedMachine = null;
            } else if (this.value === 'operator') {
                operatorDropdown.classList.remove('d-none');
                operatorDropdown.value = '';
                selectedOperator = null;
            }
            updateGanttChart();
        });
        
        // Dropdown changes
        companyDropdown.addEventListener('change', function() {
            selectedCompany = this.value ? parseInt(this.value) : null;
            updateGanttChart();
        });
        
        machineDropdown.addEventListener('change', function() {
            selectedMachine = this.value ? parseInt(this.value) : null;
            updateGanttChart();
        });
        
        operatorDropdown.addEventListener('change', function() {
            selectedOperator = this.value ? parseInt(this.value) : null;
            updateGanttChart();
        });
        
        // View buttons
        viewButtons.forEach(btn => {
            btn.addEventListener('click', function() {
                viewButtons.forEach(b => {
                    b.classList.remove('btn-primary');
                    b.classList.add('btn-outline-secondary');
                });
                this.classList.remove('btn-outline-secondary');
                this.classList.add('btn-primary');
                currentView = this.dataset.view;
                updateGanttChart();
            });
        });
        
        // Navigation buttons
        prevBtn.addEventListener('click', () => navigate(-1));
        nextBtn.addEventListener('click', () => navigate(1));
        todayBtn.addEventListener('click', () => {
            currentDate = new Date();
            updateGanttChart();
        });
        
        // Project tabs
        projectTabs.forEach(tab => {
            tab.addEventListener('click', function() {
                projectTabs.forEach(t => t.classList.remove('active'));
                this.classList.add('active');
                selectedTab = {
                    projectId: parseInt(this.dataset.projectId),
                    processId: parseInt(this.dataset.processId)
                };
                updateGanttChart();
            });
        });
        
        // Expand tabs button
        expandTabsBtn.addEventListener('click', function() {
            tabsContainer.classList.toggle('expanded');
            this.textContent = tabsContainer.classList.contains('expanded') ? '-' : '+';
        });
    }
    
    function navigate(direction) {
        if (currentView === DAY_VIEW) {
            currentDate.setDate(currentDate.getDate() + direction);
        } else if (currentView === WEEK_VIEW) {
            currentDate.setDate(currentDate.getDate() + (direction * 7));
        } else if (currentView === MONTH_VIEW) {
            currentDate.setMonth(currentDate.getMonth() + direction);
        } else if (currentView === YEAR_VIEW) {
            currentDate.setFullYear(currentDate.getFullYear() + direction);
        }
        updateGanttChart();
    }
    
    function updateGanttChart() {
        updateDateRangeDisplay();
        renderGanttHeader();
        renderGanttBody();
    }
    
    function updateDateRangeDisplay() {
        if (currentView === DAY_VIEW) {
            currentDateRange.textContent = currentDate.toLocaleDateString('en-US', {
                weekday: 'long',
                year: 'numeric',
                month: 'long',
                day: 'numeric'
            });
        } else if (currentView === WEEK_VIEW) {
            const startOfWeek = new Date(currentDate);
            startOfWeek.setDate(currentDate.getDate() - currentDate.getDay());
            const endOfWeek = new Date(startOfWeek);
            endOfWeek.setDate(startOfWeek.getDate() + 6);
            
            currentDateRange.textContent = 
                `${startOfWeek.toLocaleDateString('en-US', { month: 'short', day: 'numeric' })} - ` +
                `${endOfWeek.toLocaleDateString('en-US', { month: 'short', day: 'numeric', year: 'numeric' })}`;
        } else if (currentView === MONTH_VIEW) {
            currentDateRange.textContent = currentDate.toLocaleDateString('en-US', {
                year: 'numeric',
                month: 'long'
            });
        } else if (currentView === YEAR_VIEW) {
            currentDateRange.textContent = currentDate.getFullYear().toString();
        }
    }
    
    function renderGanttHeader() {
        // Clear existing header cells (keep the first label cell)
        while (ganttHeader.children.length > 1) {
            ganttHeader.removeChild(ganttHeader.lastChild);
        }
        
        const timeSlots = getTimeSlots();
        const slotWidth = currentView === DAY_VIEW ? 60 : 80;
        
        timeSlots.forEach(slot => {
            const cell = document.createElement('div');
            cell.className = 'gantt-header-cell';
            cell.style.minWidth = `${slotWidth}px`;
            cell.textContent = slot.label;
            ganttHeader.appendChild(cell);
        });
    }
    
    function renderGanttBody() {
        ganttBody.innerHTML = '';
        
        const timeSlots = getTimeSlots();
        const slotWidth = currentView === DAY_VIEW ? 60 : 80;
        const today = new Date();
        
        // Filter tasks based on selections
        const filteredTasks = filterTasks();
        
        // Group tasks by process
        const tasksByProcess = groupTasksByProcess(filteredTasks);
        
        // Render rows
        Object.entries(tasksByProcess).forEach(([processId, processData]) => {
            const row = document.createElement('div');
            row.className = 'gantt-row';
            
            // Row label
            const labelCell = document.createElement('div');
            labelCell.className = 'gantt-row-label';
            labelCell.textContent = `${processData.projectName} / ${processData.processName}`;
            row.appendChild(labelCell);
            
            // Timeline cells
            timeSlots.forEach(slot => {
                const cell = document.createElement('div');
                cell.className = 'gantt-row-cell';
                cell.style.minWidth = `${slotWidth}px`;
                
                // Add today marker if applicable
                if (isSameTimeUnit(today, slot.date, currentView)) {
                    const marker = document.createElement('div');
                    marker.className = 'today-marker';
                    cell.appendChild(marker);
                }
                
                row.appendChild(cell);
            });
            
            // Add task bars
            processData.tasks.forEach(task => {
                const bar = createTaskBar(task, timeSlots, slotWidth);
                if (bar) {
                    row.appendChild(bar);
                }
            });
            
            ganttBody.appendChild(row);
        });
    }
    
    function filterTasks() {
        let tasks = [];
        
        // Collect all tasks from route cards
        @foreach ($routeCards as $routeCard)
            @foreach ($routeCard->processes as $process)
                tasks.push({
                    id: {{ $process->id }},
                    name: "{{ $process->name }}",
                    startDate: new Date("{{ $process->start_date }}"),
                    endDate: new Date("{{ $process->end_date }}"),
                    machineId: "{{ $process->machine_id }}",
                    operatorId: "{{ $process->operator_id }}",
                    processId: "{{ $process->id }}",
                    processName: "{{ $process->name }}",
                    projectId: "{{ $routeCard->id }}",
                    projectName: "{{ $routeCard->company_name }}",
                    color: "{{ $routeCard->color }}",
                    machine: "{{ $process->machine->machine_name ?? 'N/A' }}",
                    operator: "{{ $process->operator->name ?? 'N/A' }}"
                });
            @endforeach
        @endforeach
        // $routeCard->sales_order->company_id  === selectedCompany
        // Apply filters
        if (selectedCompany !== null) {
            tasks = tasks.filter(task => {
                @foreach ($routeCards as $routeCard)
                    if (task.projectId === {{ $routeCard->id }} ) {
                        return true;
                    }
                @endforeach
                return false;
            });
        }
        
        if (selectedMachine !== null) {
            tasks = tasks.filter(task => task.machineId === selectedMachine);
        }
        
        if (selectedOperator !== null) {
            tasks = tasks.filter(task => task.operatorId === selectedOperator);
        }
        
        if (selectedTab !== null) {
            tasks = tasks.filter(task => 
                task.projectId === selectedTab.projectId && 
                task.processId === selectedTab.processId
            );
        }
        
        return tasks;
    }
    
    function groupTasksByProcess(tasks) {
        const groups = {};
        
        tasks.forEach(task => {
            const key = `${task.projectId}-${task.processId}`;
            if (!groups[key]) {
                groups[key] = {
                    projectId: task.projectId,
                    projectName: task.projectName,
                    processId: task.processId,
                    processName: task.processName,
                    tasks: []
                };
            }
            groups[key].tasks.push(task);
        });
        
        return groups;
    }
    
    function getTimeSlots() {
        const slots = [];
        
        if (currentView === DAY_VIEW) {
            // 24 hours
            for (let h = 0; h < 24; h++) {
                const date = new Date(currentDate);
                date.setHours(h, 0, 0, 0);
                slots.push({
                    date: date,
                    label: `${h}:00`
                });
            }
        } else if (currentView === WEEK_VIEW) {
            // 7 days of the week
            const startOfWeek = new Date(currentDate);
            startOfWeek.setDate(currentDate.getDate() - currentDate.getDay());
            
            for (let d = 0; d < 7; d++) {
                const date = new Date(startOfWeek);
                date.setDate(startOfWeek.getDate() + d);
                slots.push({
                    date: date,
                    label: date.toLocaleDateString('en-US', { weekday: 'short', month: 'short', day: 'numeric' })
                });
            }
        } else if (currentView === MONTH_VIEW) {
            // Days in month
            const year = currentDate.getFullYear();
            const month = currentDate.getMonth();
            const daysInMonth = new Date(year, month + 1, 0).getDate();
            
            for (let d = 1; d <= daysInMonth; d++) {
                const date = new Date(year, month, d);
                slots.push({
                    date: date,
                    label: d.toString()
                });
            }
        } else if (currentView === YEAR_VIEW) {
            // 12 months
            const year = currentDate.getFullYear();
            
            for (let m = 0; m < 12; m++) {
                const date = new Date(year, m, 1);
                slots.push({
                    date: date,
                    label: date.toLocaleDateString('en-US', { month: 'short' })
                });
            }
        }
        
        return slots;
    }
    
    function createTaskBar(task, timeSlots, slotWidth) {
        // Calculate task position and width
        let startIndex = -1;
        let endIndex = -1;
        
        timeSlots.forEach((slot, index) => {
            if (startIndex === -1 && task.endDate >= slot.date) {
                if (task.startDate <= getEndOfTimeUnit(slot.date, currentView)) {
                    startIndex = index;
                }
            }
            
            if (startIndex !== -1 && endIndex === -1 && task.endDate < getEndOfTimeUnit(slot.date, currentView)) {
                endIndex = index;
            }
        });
        
        // If task extends beyond our time slots
        if (startIndex !== -1 && endIndex === -1) {
            endIndex = timeSlots.length - 1;
        }
        
        // If task doesn't fit in our time range at all
        if (startIndex === -1 || endIndex === -1) {
            return null;
        }
        
        const barWidth = (endIndex - startIndex + 1) * slotWidth - 8;
        const barLeft = startIndex * slotWidth + 200; // 200px for label column
        
        const bar = document.createElement('div');
        bar.className = 'gantt-bar';
        bar.style.left = `${barLeft}px`;
        bar.style.width = `${barWidth}px`;
        bar.style.backgroundColor = task.color;
        bar.textContent = task.name;
        
        // Add tooltip
        bar.addEventListener('mouseenter', (e) => showTooltip(e, task));
        bar.addEventListener('mouseleave', hideTooltip);
        
        return bar;
    }
    
    function getEndOfTimeUnit(date, view) {
        const endDate = new Date(date);
        
        if (view === DAY_VIEW) {
            endDate.setHours(23, 59, 59, 999);
        } else if (view === WEEK_VIEW) {
            endDate.setDate(date.getDate() + 1);
            endDate.setMilliseconds(-1);
        } else if (view === MONTH_VIEW) {
            endDate.setMonth(date.getMonth() + 1);
            endDate.setMilliseconds(-1);
        } else if (view === YEAR_VIEW) {
            endDate.setFullYear(date.getFullYear() + 1);
            endDate.setMilliseconds(-1);
        }
        
        return endDate;
    }
    
    function isSameTimeUnit(date1, date2, view) {
        if (view === DAY_VIEW) {
            return date1.getFullYear() === date2.getFullYear() &&
                   date1.getMonth() === date2.getMonth() &&
                   date1.getDate() === date2.getDate();
        } else if (view === WEEK_VIEW) {
            const d1 = new Date(date1);
            const d2 = new Date(date2);
            d1.setHours(0, 0, 0, 0);
            d2.setHours(0, 0, 0, 0);
            const diff = Math.abs(d1 - d2);
            return diff < 7 * 24 * 60 * 60 * 1000 && 
                   d1.getDay() === d2.getDay();
        } else if (view === MONTH_VIEW) {
            return date1.getFullYear() === date2.getFullYear() &&
                   date1.getMonth() === date2.getMonth();
        } else if (view === YEAR_VIEW) {
            return date1.getFullYear() === date2.getFullYear();
        }
        return false;
    }
    
    function showTooltip(event, task) {
        tooltip.innerHTML = `
            <h5>${task.name}</h5>
            <p><strong>Project:</strong> ${task.projectName}</p>
            <p><strong>Process:</strong> ${task.processName}</p>
            <p><strong>Dates:</strong> ${task.startDate.toLocaleDateString()} - ${task.endDate.toLocaleDateString()}</p>
            <p><strong>Machine:</strong> ${task.machine}</p>
            <p><strong>Operator:</strong> ${task.operator}</p>
        `;
        tooltip.style.display = 'block';
        tooltip.style.left = `${event.pageX + 10}px`;
        tooltip.style.top = `${event.pageY + 10}px`;
    }
    
    function hideTooltip() {
        tooltip.style.display = 'none';
    }
    
    // Initialize with first tab selected if available
    if (projectTabs.length > 0) {
        projectTabs[0].classList.add('active');
        selectedTab = {
            projectId: parseInt(projectTabs[0].dataset.projectId),
            processId: parseInt(projectTabs[0].dataset.processId)
        };
    }
});
</script>
@endsection