@extends('layouts.app')

@section('content')
<div class="container py-4">
    <div class="row">
        <div class="col-12">
            <div class="card shadow-sm">
                <div class="card-header d-flex justify-content-between align-items-center">
                    <h3 class="page-title m-0">
                        <i class="fas fa-laptop-code me-2 text-primary"></i>All Online Courses
                    </h3>
                    <!-- Include the reusable send-email component -->
                    <x-send-email />
                </div>
                <div class="card-body">
                    <!-- Filter Controls -->
                    <div class="row mb-4">
                        <div class="col-md-4">
                            <div class="input-group">
                                <span class="input-group-text bg-light">Department</span>
                                @if(auth()->user()->role_id == 1)
                                    {{-- Admin: can choose any department --}}
                                    <select id="department-filter" class="form-select">
                                        <option value="">All Departments</option>
                                        @foreach($departments as $department)
                                            <option value="{{ $department->id }}">{{ $department->name }}</option>
                                        @endforeach
                                    </select>
                                @else
                                    {{-- Coordinator/Faculty: department is fixed --}}
                                    <select id="department-filter" class="form-select" disabled>
                                        <option value="{{ auth()->user()->department_id }}">
                                            {{ auth()->user()->department->name }}
                                        </option>
                                    </select>
                                @endif
                            </div>
                        </div>

                        <div class="col-md-4">
                            <div class="input-group">
                                <span class="input-group-text bg-light">Course Offered By</span>
                                <select id="offered_by-filter" class="form-select">
                                    <option value="">All Platforms</option>
                                    <option value="NPTEL">NPTEL</option>
                                    <option value="Google Digital Garage">Google Digital Garage</option>
                                    <option value="LinkedIn Learning">LinkedIn Learning</option>
                                    <option value="Microsoft Learn">Microsoft Learn</option>
                                    <option value="Coursera">Coursera</option>
                                    <option value="edX">edX</option>
                                    <option value="Udemy">Udemy</option>
                                </select>
                            </div>
                        </div>
                        <div class="col-md-4">
                            <div class="input-group">
                                <span class="input-group-text bg-light">Date Range</span>
                                <input type="date" id="date-from" class="form-control">
                                <span class="input-group-text bg-light">to</span>
                                <input type="date" id="date-to" class="form-control">
                            </div>
                        </div>
                    </div>
                    
                    <!-- Column Selector -->
                    <div class="flex justify-between col-md-12 mt-3 mb-4">
                        <!-- Include the reusable download-proofs component -->
                        <x-download-proofs :route="route('admin.downloadProofs')" :model="'OnlineCourse'" />
                        @php
                            use Illuminate\Support\Str;
                            $labels = [
                                'Faculty',
                                'Department',
                                'Course',
                                'Offered By',
                                'Start Date',
                                'End Date',
                                'Num Days',
                            ];
                            $columns = [];
                            foreach ($labels as $i => $label) {
                                $columns[] = [
                                    'label' => $label,
                                    'id' => 'column-' . Str::slug($label, '-'),
                                    'value' => $i + 2,
                                    'checked' => $label !== 'Num Days',
                                ];
                            }
                        @endphp
                        <x-column-selector :columns="$columns" />
                    </div>

                    <!-- Table -->
                    <div class="table-responsive">
                        <table id="onlineCourse-table" class="table table-striped table-hover">
                            <thead>
                                <tr>
                                    <th class="select-checkbox"></th>
                                    <th>ID</th>
                                    <th>Faculty</th>
                                    <th>Department</th>
                                    <th>Course</th>
                                    <th>Offered By</th>
                                    <th>Start Date</th>
                                    <th>End Date</th>
                                    <th>Num Days</th>
                                    <th>Actions</th>
                                </tr>
                            </thead>
                            <tbody>
                                <!-- Data will be loaded via AJAX -->
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
@endsection

@section('scripts')
<script src="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/js/all.min.js" integrity="sha512-Tn2m0TIpgVyTzzvmxLNuqbSJH3JP8jm+Cy3hvHrW7ndTDcJ1w5mBiksqDBb8GpE2ksktFvDB/ykZ0mDpsZj20w==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script>
    const downloadProofsRoute = "{{ route('admin.downloadProofs') }}";
    const currentModel = "{{ isset($model) ? $model : 'OnlineCourse' }}";
    const csrf_token = "{{ csrf_token() }}";
    $(document).ready(function() {
        // Handle "Select All" checkbox for missing proofs modal
        $('#selectAll').change(function() {
            const isChecked = $(this).prop('checked');
            $('input[name="categories[]"]').prop('checked', isChecked);
        });

        // Update "Select All" when individual checkboxes change
        $('input[name="categories[]"]').change(function() {
            const totalCheckboxes = $('input[name="categories[]"]').length;
            const checkedCheckboxes = $('input[name="categories[]"]:checked').length;
            $('#selectAll').prop('checked', totalCheckboxes === checkedCheckboxes);
        });

        // Form validation for the modal
        const form = document.getElementById('missingProofsForm');
        if (form) {
            form.addEventListener('submit', function(e) {
                const checkboxes = form.querySelectorAll('input[type="checkbox"]:checked');

                if (checkboxes.length === 0) {
                    e.preventDefault();
                    alert('Please select at least one category before sending emails.');
                }
            });
        }

        const sheetName = "Online Courses Report";
        let table; // Declare table variable in the outer scope

        function exportOptions() {
            return {
                columns: ':visible',
                format: {
                    body: function(data, row, column, node) {
                        if ($(node).find('select').length) {
                            return $(node).find("select option:selected").text();
                        }
                        return $(node).text();
                    }
                }
            };
        }

        // Function to toggle column visibility
        function toggleColumnVisibility() {
            $('.column-checkbox').each(function() {
                const columnIndex = $(this).val();
                const isChecked = $(this).is(':checked');

                // Show or hide the column based on checkbox state
                if (table) {
                    table.column(columnIndex).visible(isChecked);
                }
            });

            // Adjust table layout only if table and responsive are initialized
            if (table && table.responsive) {
                table.columns.adjust().responsive.recalc();
            } else if (table) {
                table.columns.adjust();
            }
        }

        var initAjaxRoute = function(route) {
            // If table already exists, destroy it before re-initializing
            if ($.fn.DataTable.isDataTable('#onlineCourse-table')) {
                $('#onlineCourse-table').DataTable().destroy();
            }

            table = $("#onlineCourse-table").DataTable({
                processing: true,
                serverSide: true,
                responsive: true,
                ajax: {
                    url: route,
                    data: function(d) {
                        d.department = $('#department-filter').val();
                        d.offered_by = $('#offered_by-filter').val();
                        d.dateFrom = $('#date-from').val();
                        d.dateTo = $('#date-to').val();
                    }
                },
                columns: [
                    {
                        data: null,
                        defaultContent: '',
                        orderable: false,
                        searchable: false
                    },
                    { data: 'id', name: 'id', searchable: false },
                    { data: 'user_name', name: 'user_name', orderable: true },
                    { data: 'department_name', name: 'department_name', orderable: true },
                    { data: 'course', name: 'course', orderable: true },
                    { data: 'offered_by', name: 'offered_by', orderable: true },
                    { data: 'start_date', name: 'start_date', orderable: true },
                    { data: 'end_date', name: 'end_date', orderable: true },
                    { data: 'num_days', name: 'num_days', orderable: true },
                    { data: 'action', name: 'action', orderable: false, searchable: false },
                ],
                columnDefs: [
                    {
                        targets: 0,
                        orderable: false,
                        className: 'select-checkbox',
                        render: function(data, type, row) {
                            return row.proof ?
                                '<input type="checkbox" class="row-checkbox" data-id="' + row.id + '">' :
                                '<input type="checkbox" disabled>';
                        }
                    },
                    { 
                        targets: '_all',
                        className: 'text-center wrap-text'
                    },
                    {
                        targets: 9,
                        render: function(data, type, row) {
                            return '<div class="btn-group" role="group">' +
                                data +
                                '</div>';
                        }
                    }
                ],
                dom: '<"d-flex justify-content-between align-items-center mb-3"<"d-flex align-items-center"l><"d-flex"f<"ms-2"B>>>rtip',
                buttons: [
                    {
                        extend: 'copy',
                        text: '<i class="fas fa-copy me-1"></i> Copy',
                        className: 'btn btn-sm btn-outline-white',
                        title: sheetName,
                        exportOptions: exportOptions()
                    },
                    {
                        extend: 'csv',
                        text: '<i class="fas fa-file-csv me-1"></i> CSV',
                        className: 'btn btn-sm btn-outline-white',
                        title: sheetName,
                        exportOptions: exportOptions()
                    },
                    {
                        extend: 'excel',
                        text: '<i class="fas fa-file-excel me-1"></i> Excel',
                        className: 'btn btn-sm btn-outline-white',
                        title: sheetName,
                        exportOptions: exportOptions()
                    },
                    {
                        extend: 'pdf',
                        text: '<i class="fas fa-file-pdf me-1"></i> PDF',
                        className: 'btn btn-sm btn-outline-white',
                        title: sheetName,
                        exportOptions: exportOptions()
                    },
                    {
                        extend: 'print',
                        text: '<i class="fas fa-print me-1"></i> Print',
                        className: 'btn btn-sm btn-outline-white',
                        title: sheetName,
                        exportOptions: exportOptions()
                    }
                ],
                language: {
                    search: "<i class='fas fa-search'></i> _INPUT_",
                    searchPlaceholder: "Search records...",
                    lengthMenu: "<i class='fas fa-list me-1'></i> _MENU_ records per page",
                    info: "Showing _START_ to _END_ of _TOTAL_ entries",
                    paginate: {
                        first: "<i class='fas fa-angle-double-left'></i>",
                        last: "<i class='fas fa-angle-double-right'></i>",
                        next: "<i class='fas fa-angle-right'></i>",
                        previous: "<i class='fas fa-angle-left'></i>"
                    }
                },
                // Initialize the column visibility after table is drawn
                initComplete: function() {
                    // Set column visibility
                    toggleColumnVisibility();
                    
                    // Add select-all checkbox
                    addSelectAllCheckbox();
                },
                drawCallback: function() {
                    // Ensure select-all checkbox is present on redraw
                    addSelectAllCheckbox();
                }
            });

            // Apply filters when they change
            $('#department-filter, #offered_by-filter, #date-from, #date-to').change(function() {
                table.ajax.reload();
            });

            return table;
        };

        // Delete button handler
        $('#onlineCourse-table').on('click', '.delete-btn', function() {
            if (confirm('Are you sure you want to delete this record?')) {
                const id = $(this).data('id');
                const url = $(this).data('url');

                $.ajax({
                    url: url,
                    type: 'DELETE',
                    data: {
                        "_token": "{{ csrf_token() }}"
                    },
                    success: function(result) {
                        table.ajax.reload();
                        showToast('Record deleted successfully', 'success');
                    },
                    error: function(error) {
                        console.error(error);
                        showToast('Error deleting record', 'danger');
                    }
                });
            }
        });

        // Handle row selection and Download button state
        $('#responses-table').on('change', '.row-checkbox', function() {
            const selectedRows = $('.row-checkbox:checked').length;
            $('#download-proofs').prop('disabled', selectedRows === 0);
        });

        // Download proofs button handler
        $('#download-proofs').on('click', function() {
            const selectedIds = [];

            $('.row-checkbox:checked').each(function() {
                const id = $(this).data('id');
                if (id) selectedIds.push(id);
            });

            if (selectedIds.length > 0) {
                // Create a form to submit the request
                const form = $('<form></form>')
                    .attr('method', 'POST')
                    .attr('action', downloadProofsRoute)
                    .css('display', 'none');

                // Add CSRF token
                $('<input>')
                    .attr('type', 'hidden')
                    .attr('name', '_token')
                    .attr('value', csrf_token)
                    .appendTo(form);

                // Add selected IDs
                $('<input>')
                    .attr('type', 'hidden')
                    .attr('name', 'ids')
                    .attr('value', JSON.stringify(selectedIds))
                    .appendTo(form);
                    
                // Add model name
                $('<input>')
                    .attr('type', 'hidden')
                    .attr('name', 'model')
                    .attr('value', currentModel)
                    .appendTo(form);

                $('body').append(form);
                form.submit();
            }
        });

        // Function to add select-all checkbox to the table header
        function addSelectAllCheckbox() {
            // Only add if it doesn't exist yet
            if ($('#select-all-checkbox').length === 0) {
                const selectAllCheckbox = $('<input>', {
                    type: 'checkbox',
                    id: 'select-all-checkbox',
                    class: 'form-check-input'
                });

                // Add to the first header column
                $('#responses-table thead th.select-checkbox').html(selectAllCheckbox);

                // Handle the select all functionality
                $('#select-all-checkbox').on('change', function() {
                    const isChecked = $(this).prop('checked');
                    $('.row-checkbox:not(:disabled)').prop('checked', isChecked);

                    // Update download button state
                    const selectedRows = $('.row-checkbox:checked').length;
                    $('#download-proofs').prop('disabled', selectedRows === 0);
                });
            }
        }

        // Toast notification function
        function showToast(message, type) {
            const toastContainer = document.createElement('div');
            toastContainer.className = 'position-fixed bottom-0 start-0 p-3';
            toastContainer.style.zIndex = '1050';

            const toastEl = document.createElement('div');
            toastEl.className = `toast align-items-center text-white bg-${type} border-0`;
            toastEl.setAttribute('role', 'alert');
            toastEl.setAttribute('aria-live', 'assertive');
            toastEl.setAttribute('aria-atomic', 'true');

            toastEl.innerHTML = `
            <div class="d-flex">
                <div class="toast-body">
                    ${message}
                </div>
                <button type="button" class="btn-close btn-close-white me-2 m-auto" data-bs-dismiss="toast" aria-label="Close"></button>
            </div>
        `;

            toastContainer.appendChild(toastEl);
            document.body.appendChild(toastContainer);

            const toast = new bootstrap.Toast(toastEl, {
                autohide: true,
                delay: 3000
            });

            toast.show();

            toastEl.addEventListener('hidden.bs.toast', function() {
                document.body.removeChild(toastContainer);
            });
        }

        // Set appropriate route based on user role
        const userRole = "{{ auth()->user()->role->name }}";
        let dataRoute = "{{ route('admin.OnlineCoursesResponses.data') }}";

        if (userRole === 'Coordinator') {
            dataRoute = "{{ route('coordinator.OnlineCoursesResponses.data') }}";
        }
        if (userRole === 'Faculty') {
            dataRoute = "{{ route('faculty.OnlineCoursesResponses.data') }}";
        }

        // Initialize the data table
        table = initAjaxRoute(dataRoute);

        // Attach change event listener to column visibility checkboxes
        $('.column-checkbox').on('change', function() {
            toggleColumnVisibility();
        });

        // Ensure "Actions" column is always visible
        $('#column-actions').prop('disabled', true);

        // Select all columns button
        $('#select-all-columns').click(function() {
            $('.column-checkbox').prop('checked', true).trigger('change');
        });

        // Deselect all columns button
        $('#deselect-all-columns').click(function() {
            $('.column-checkbox').prop('checked', false).trigger('change');
        });

        // Prevent dropdown from closing when clicking inside it
        $('.dropdown-menu').on('click', function(e) {
            e.stopPropagation();
        });

        // Set department filter from query string if present
        $(document).ready(function() {
            const urlParams = new URLSearchParams(window.location.search);
            const departmentId = urlParams.get('department_id');
            if (departmentId) {
                $('#department-filter').val(departmentId).trigger('change');
            }
        });
    });
</script>
<style>
    .form-check-input:checked {
        background-color: #b7202e;
        border-color: #ed1c24;
    }


    .dropdown-menu {
        background-color: #fff;
        border-radius: 0.5rem;
        box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    }

    .dropdown-menu .form-check-input:checked {
        background-color: #b7202e;
        border-color: #ed1c24;
    }

    .dropdown-menu .form-check-input:focus {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:checked:focus {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible {
        outline: none;
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:checked:focus-visible {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible:checked {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible:not(:checked) {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible:not(:checked):checked {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible:not(:checked):not(:checked) {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible:not(:checked):not(:checked):checked {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible:not(:checked):not(:checked):not(:checked) {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible:not(:checked):not(:checked):not(:checked):checked {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .dropdown-menu .form-check-input:focus-visible:not(:checked):not(:checked):not(:checked):not(:checked) {
        box-shadow: 0 0 0 0.2rem rgba(189, 72, 46, 0.25);
    }

    .form-switch .form-check-input {
        width: 2.5em;
        margin-left: -2.8em;
        position: relative;
    }

    .form-switch .form-check-input:focus {
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='rgba%280, 0, 0, 0.25%29'/%3e%3c/svg%3e");
    }

    .form-switch .form-check-input:checked {
        background-position: right center;
        background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e");
        transition: background-position 0.15s ease-in-out;
    }

    /* Enhance the toggle appearance */
    .form-switch .form-check-input {
        background-size: contain;
        transition: 0.2s;
    }

    .dropdown-menu {
        max-height: 400px;
        overflow-y: auto;
    }
    
    /* Ensure the table container is responsive */
    .table-responsive {
        overflow-x: auto;
        white-space: nowrap;
    }

    /* Ensure the table fits within the container */
    #onlineCourse-table {
        width: 100% !important;
    }


    .select-checkbox {
        width: 30px;
        text-align: center;
    }

    .select-checkbox input[type="checkbox"] {
        width: 18px;
        height: 18px;
        cursor: pointer;
    }

    .select-checkbox input[type="checkbox"]:disabled {
        opacity: 0.5;
        cursor: not-allowed;
    }

    /* Style the Download button */
    #download-proofs {
        background-color: #28a745;
        border-color: #28a745;
    }

    #download-proofs:hover:not(:disabled) {
        background-color: #218838;
        border-color: #218838;
    }

    #download-proofs:disabled {
        opacity: 0.65;
        cursor: not-allowed;
    }
</style>
@endsection