@extends('layouts.app')
@section('content')
    <div class="row">
        <div class="col-md-6 col-12 mb-4">
            <div class="card">
                <div class="card-header">
                    <h2>Modules <small>List</small></h2>
                </div>
                <div class="card-body">
                    <form action="{{ route('chapter.index', ['program_id' => $programId]) }}" method="GET"
                        class="form-horizontal form-label-left input_mask">
                        <div class="item form-group">
                            <label for="day_filter" class="control-label col-md-4 col-sm-4 col-xs-12">Day</label>
                            <select name="day_id" id="day_filter" class="form-control">
                                <option value="">All Days</option>
                                @php
                                    $activeDays = $days->where('bActive', 1);
                                    $inactiveDays = $days->where('bActive', 0);
                                @endphp
                                @if ($activeDays->isNotEmpty())
                                    <optgroup label="Active Days">
                                        @foreach ($activeDays as $tDay)
                                            <option value="{{ $tDay->iDayID }}"
                                                {{ $selectedDayId == $tDay->iDayID ? 'selected' : '' }}>
                                                {{ $tDay->vDay }} - {{ $tDay->vName }}
                                            </option>
                                        @endforeach
                                    </optgroup>
                                @endif

                                @if ($inactiveDays->isNotEmpty())
                                    <optgroup label="Inactive Days">
                                        @foreach ($inactiveDays as $tDay)
                                            <option value="{{ $tDay->iDayID }}"
                                                {{ $selectedDayId == $tDay->iDayID ? 'selected' : '' }}>
                                                {{ $tDay->vDay }} - {{ $tDay->vName }}
                                            </option>
                                        @endforeach
                                    </optgroup>
                                @endif
                            </select>
                        </div>
                        <div class="text-center">
                            <button type="submit" class="btn btn-primary">Filter</button>
                            <a href="{{ route('chapter.index', ['program_id' => $programId]) }}"
                                class="btn btn-secondary">Reset</a>
                        </div>
                        <div class="ln_solid"></div>
                    </form>
                </div>
                <!-- </div> -->
                <div class="card-body table-responsive">
                    <table id="datatableChapters" class="table table-striped table-bordered table-responsive">
                        <thead>
                            <tr>
                                <th>ID</th>
                                <th>Title</th>
                                <th>Background</th>
                                <th>Day</th>
                                <th>Num</th>
                                <th>A/B Test</th>
                                <th>First SubModule</th>
                                <th>Active</th>
                                <th>Action</th>
                            </tr>
                        </thead>

                        <tbody>
                            @foreach ($chapters as $chapter)
                                <tr>
                                    <td>{{ $chapter->iChapterId }}</td>
                                    <td>{{ $chapter->vTitle }}</td>
                                    <td>
                                        @if ($chapter->vBackgroundImg)
                                            <a data-fancybox="gallery"
                                                data-src="{{ config('constants.backgroundimg.url') . ltrim($chapter->vBackgroundImg, '/') }}"
                                                data-caption="{{ $chapter->vTitle }}"
                                                class="position-relative d-inline-block" title="Click to view full size">
                                                <img src="{{ config('constants.backgroundimg.url') . ltrim($chapter->vBackgroundImg, '/') }}"
                                                    width="{{ config('constants.backgroundimg.thumb_width') }}"
                                                    height="{{ config('constants.backgroundimg.thumb_height') }}"
                                                    alt="{{ $chapter->vTitle }}" class="img-fluid"
                                                    onerror="this.style.display='none'; this.parentElement.textContent='No Image';">
                                            </a>
                                        @else
                                            No Image
                                        @endif
                                    </td>
                                    <td>
                                        @if ($chapter->day)
                                            {{ $chapter->day->vDay }}
                                        @endif
                                    </td>
                                    <td>{{ $chapter->iNum }}</td>
                                    <td>{{ $chapter->iABTest }}</td>
                                    <td>{{ $chapter->iFirstSubModule }}</td>
                                    <td>
                                        <input type="hidden" class="active-toggle-hidden" value="0"
                                               data-id="{{ $chapter->iChapterId }}">
                                        <input {{Auth::guard('admin')->user()->bContent == 1 ? '':'disabled'}}
                                               type="checkbox"
                                               class="js-switch active-toggle"
                                               data-id="{{ $chapter->iChapterId }}"
                                               value="1" {{ $chapter->bActive ? 'checked' : '' }} />
                                    </td>
                                    <td>
                                        @if (Auth::guard('admin')->user()->bContent == 1)
                                            <button type="button" class="btn btn-info btn-xs text-nowrap edit-chapter"
                                                data-id="{{ $chapter->iChapterId }}" data-dayid="{{ $chapter->iDayId }}"
                                                data-title="{{ $chapter->vTitle }}"
                                                data-bgimg="{{ $chapter->vBackgroundImg ? config('constants.backgroundimg.url') . ltrim($chapter->vBackgroundImg, '/') : '' }}"
                                                data-num="{{ $chapter->iNum }}"
                                                data-firstsubmodule="{{ $chapter->iFirstSubModule }}"
                                                data-abtest="{{ $chapter->iABTest }}" data-bfree="{{ $chapter->bFree }}"
                                                data-boptional="{{ $chapter->bOptional }}">
                                                <i class="fa fa-pencil"></i> Edit
                                            </button>
                                            <button type="button" class="btn btn-danger btn-xs text-nowrap chapterdelete"
                                                data-title="{{ $chapter->vTitle }}" data-id="{{ $chapter->iChapterId }}">
                                                <i class="fa fa-trash-o"></i> Delete
                                            </button>
                                        @endif
                                        <a href="{{ route('submodule.index', ['program_id' => $programId, 'chapter_id' => $chapter->iChapterId]) }}"
                                            class="btn btn-primary btn-xs text-nowrap" target="_blank">
                                            <i class="fa fa-plus"></i> Add Sub Modules
                                        </a>

                                    </td>
                                </tr>
                            @endforeach
                        </tbody>
                    </table>
                </div>
            </div>
        </div>

        <div class="col-md-6">
            <div class="card">
                <div class="card-header d-flex justify-content-between align-items-center">
                    <h2 id="chapter-title">{{ isset($selectedChapter) ? 'Edit' : 'Create' }} <small>Module</small></h2>
                </div>
                <div class="card-body" id="createChapterForm">
                    <form id="frmchapter" name="frmchapter" method="post" enctype="multipart/form-data"
                        action="{{ route('chapter.store', ['program_id' => $programId]) }}">
                        @csrf
                        <input type="hidden" name="_method" id="chapter-method" value="POST">
                        <input type="hidden" name="chapter_id" id="chapter_id" value="">
                        <input type="hidden" id="chapter-mode" value="create">

                        <div class="form-group row">
                            <label class="col-md-3 col-form-label">Day</label>
                            <div class="col-md-9">
                                <select id="iDayId" name="iDayId" class="form-control" required>
                                    <option value="0">Select Day</option>
                                    @php
                                        $activeDays = $days->where('bActive', 1);
                                        $inactiveDays = $days->where('bActive', 0);
                                    @endphp
                                    @if ($activeDays->isNotEmpty())
                                        <optgroup label="Active Days">
                                            @foreach ($activeDays as $tDay)
                                                <option value="{{ $tDay->iDayID }}"
                                                    {{ old('iDayId') == $tDay->iDayID ? 'selected' : '' }}>
                                                    {{ $tDay->vDay }} - {{ $tDay->vName }}
                                                </option>
                                            @endforeach
                                        </optgroup>
                                    @endif

                                    @if ($inactiveDays->isNotEmpty())
                                        <optgroup label="Inactive Days">
                                            @foreach ($inactiveDays as $tDay)
                                                <option value="{{ $tDay->iDayID }}"
                                                    {{ old('iDayId') == $tDay->iDayID ? 'selected' : '' }}>
                                                    {{ $tDay->vDay }} - {{ $tDay->vName }}
                                                </option>
                                            @endforeach
                                        </optgroup>
                                    @endif
                                </select>
                                @error('iDayId')
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label class="col-md-3 col-form-label">Title<span class="text-danger asterisk">*</span></label>
                            <div class="col-md-9">
                                <input id="vTitle" name="vTitle" type="text" class="form-control" placeholder="Title"
                                    value="{{ old('vTitle') }}" required>
                                @error('vTitle')
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label class="col-md-3 col-form-label">Background Image<span
                                    class="text-danger asterisk">*</span></label>
                            <div class="col-md-9">
                                <input type="file" id="vBackgroundImg" name="vBackgroundImg"
                                    class="form-control-file" accept="image/jpeg" required>
                                <a id="vBackgroundImgLink" href="#" target="_blank"
                                    class="pull-right d-none">Image
                                    Link</a>
                                <small class="form-text text-muted">Must be under 100KB. Only jpg format is
                                    allowed.</small>
                                <span id="vBackgroundImgError" class="text-danger" style="display:none;"></span>
                                @error('vBackgroundImg')
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label class="col-md-3 col-form-label">Num<span class="text-danger asterisk">*</span></label>
                            <div class="col-md-9">
                                <input id="iNum" name="iNum" type="number" class="form-control"
                                    placeholder="Num" value="{{ old('iNum') }}" required>
                                @error('iNum')
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label class="col-md-3 col-form-label">First Sub Module</label>
                            <div class="col-md-9">
                                <select id="iFirstSubModule" name="iFirstSubModule" class="form-control">
                                    <option value="">Select First SubModule</option>
                                    @foreach ($firstSubModules as $subModule)
                                        <option value="{{ $subModule->iSubModuleId }}"
                                            {{ old('iFirstSubModule') == $subModule->iSubModuleId ? 'selected' : '' }}>
                                            {{ $subModule->iSubModuleId }}
                                        </option>
                                    @endforeach
                                </select>
                                @error('iFirstSubModule')
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label class="col-md-3 col-form-label">A/B Test</label>
                            <div class="col-md-9">
                                <input id="iABTest" name="iABTest" type="number" class="form-control"
                                    placeholder="A/B Test" value="{{ old('iABTest') }}">
                                @error('iABTest')
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label class="col-md-3 col-form-label">Is Free?</label>
                            <div class="col-md-9">
                                <input type="hidden" name="chkbFree" value="0">
                                <input type="checkbox" class="js-switch" name="chkbFree" id="chkbFree" value="1"
                                    {{ old('chkbFree') == 1 ? 'checked' : '' }} />
                                @error('chkbFree')
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>

                        <div class="form-group row">
                            <label class="col-md-3 col-form-label">Is Optional?</label>
                            <div class="col-md-9">
                                <input type="hidden" name="chkbOptional" value="0">
                                <input type="checkbox" class="js-switch" name="chkbOptional" id="chkbOptional" value="1"
                                    {{ old('chkbOptional') == 1 ? 'checked' : '' }} />
                                @error('chkbOptional')
                                    <span class="text-danger">{{ $message }}</span>
                                @enderror
                            </div>
                        </div>

                        <hr>
                        <div class="form-group row">
                            <div class="col-md-9 offset-md-3">
                                @if (Auth::guard('admin')->user()->bContent == 1)
                                    <button type="button" id="btn-reset" class="btn btn-secondary">Cancel</button>
                                    <button type="submit" id="btn-submit" class="btn btn-success">Create</button>
                                @endif
                            </div>
                        </div>
                    </form>
                </div>
            </div>
        </div>
    </div>

    <!-- Delete Confirmation Modal -->
    <div class="modal fade" id="deleteModal" tabindex="-1" role="dialog" aria-labelledby="deleteModalLabel"
        aria-hidden="true">
        <div class="modal-dialog" role="document">
            <div class="modal-content">
                <div class="modal-header">
                    <h5 class="modal-title" id="deleteModalLabel">Confirm Delete</h5>
                    <button type="button" class="close" data-bs-dismiss="modal" aria-label="Close">
                        <span aria-hidden="true">&times;</span>
                    </button>
                </div>
                <div class="modal-body">
                    Are you sure you want to delete <span id="chapterTitle"></span>?
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-dismiss="modal">Keep</button>
                    <form id="deleteForm" method="POST">
                        @csrf
                        @method('DELETE')
                        <button type="submit" class="btn btn-danger">Delete</button>
                    </form>
                </div>
            </div>
        </div>
    </div>
@endsection

@push('scripts')
    <script>
        // Wait for the plugins to be loaded
        document.addEventListener('plugins-loaded', function() {
            initializeComponents();
        });

        // Fallback in case the event doesn't fire
        setTimeout(function() {
            initializeComponents();
        }, 2000);

        function initializeComponents() {
            // Make this function idempotent: prevent double-initialization which can
            // attach duplicate event handlers (causing handlers to run twice).
            if (initializeComponents._initialized) return;
            initializeComponents._initialized = true;

            // Check if jQuery is properly loaded
            if (window.jQuery) {
                // Initialize DataTable
                if (!$.fn.DataTable.isDataTable('#datatableChapters')) {
                    $("#datatableChapters").DataTable({
                        "pageLength": 50,
                        "order": [
                            [3, "asc"],
                            [4, "asc"]
                        ],
                        columnDefs: [{
                            targets: '_all',
                            orderSequence: ['asc', 'desc']
                        }],
                    });
                }

                // Day filter change event (ensure we don't attach multiple handlers)
                $('#day_filter').off('change').on('change', function() {
                    $(this).closest('form').submit();
                });

                validateFileSize('vBackgroundImg', 100, 'vBackgroundImgError', ['image/jpeg']);

                // Edit button functionality (use event delegation for DataTables pagination)
                $('#datatableChapters').on('click', '.edit-chapter', function() {
                    // Update form title
                    $('#chapter-title').html('Edit <small>Chapter</small>');
                    $('#chapter-mode').val('edit');

                    // Get data attributes
                    var id = $(this).data('id');
                    var dayId = $(this).data('dayid');
                    var title = $(this).data('title');
                    var bgImg = $(this).data('bgimg');
                    var num = $(this).data('num');
                    var firstSubModule = $(this).data('firstsubmodule');
                    var abTest = $(this).data('abtest');
                    var bFree = $(this).data('bfree');
                    var bOptional = $(this).data('boptional');
                    // Change form to PUT method
                    $('#chapter-method').val('PUT');
                    $('#chapter_id').val(id);

                    // Update form action URL
                    var updateUrl = "{{ route('chapter.index', $programId) }}/" + id;
                    $('#frmchapter').attr('action', updateUrl);

                    // Set form values
                    $('#iDayId').val(dayId);
                    $('#vTitle').val(title);
                    if (bgImg) {
                        $('#vBackgroundImgLink').attr('href', bgImg).removeClass('d-none');
                        $('#vBackgroundImg').attr('required', false);
                    } else {
                        $('#vBackgroundImgLink').attr('href', '#').addClass('d-none');
                        $('#vBackgroundImg').attr('required', true);
                    }
                    $('#iNum').val(num);
                    $('#iABTest').val(abTest);
                    if (bFree) {
                        $('#chkbFree').prop('checked', false).trigger('click');
                    } else {
                        $('#chkbFree').prop('checked', true).trigger('click');
                    }
                    if (bOptional) {
                        $('#chkbOptional').prop('checked', false).trigger('click');
                    } else {
                        $('#chkbOptional').prop('checked', true).trigger('click');
                    }

                    // Load submodules for the selected chapter
                    loadSubModulesForChapter(id, firstSubModule);

                    // Change submit button text
                    $('#btn-submit').text('Save Changes');
                    // Scroll to form and focus
                    $('#createChapterForm')[0].scrollIntoView({
                        behavior: 'smooth'
                    });
                });

                // Function to load submodules for a specific chapter
                function loadSubModulesForChapter(chapterId, selectedSubModuleId) {
                    // Make AJAX call to get submodules for the chapter
                    $.ajax({
                        url: "{{ route('chapter.get-submodules', ['program_id' => $programId, 'chapter_id' => 0]) }}"
                            .replace('/0/', '/' + chapterId + '/'),
                        type: "GET",
                        dataType: "json",
                        success: function(data) {
                            // Clear the dropdown first
                            $('#iFirstSubModule').empty();
                            $('#iFirstSubModule').append('<option value="">Select First SubModule</option>');

                            // Add options to the dropdown
                            $.each(data, function(index, subModule) {
                                var selected = (subModule.iSubModuleId == selectedSubModuleId) ?
                                    'selected' : '';
                                $('#iFirstSubModule').append('<option value="' + subModule
                                    .iSubModuleId + '" ' + selected + '>' +
                                    subModule.iSubModuleId + '</option>');
                            });
                        },
                        error: function(xhr, status, error) {
                            console.error("Error loading submodules: " + error);
                        }
                    });
                }

                // Reset button functionality
                $('#btn-reset').off('click').on('click', function() {
                    // Reset form to create mode
                    resetForm();
                });

                function resetForm() {
                    // Reset form title
                    $('#chapter-title').html('Create <small>Chapter</small>');
                    $('#chapter-mode').val('create');

                    // Reset form method and action
                    $('#chapter-method').val('POST');
                    $('#chapter_id').val('');
                    $('#frmchapter').attr('action', "{{ route('chapter.store', ['program_id' => $programId]) }}");
                    document.querySelectorAll('.text-danger:not(.asterisk)').forEach(function(element) {
                        element.style.display = 'none';
                    });

                    // Clear form values
                    $('#iDayId').val('0');
                    $('#vTitle').val('');
                    $('#vBackgroundImg').val('');
                    $('#vBackgroundImgLink').attr('href', '#').addClass('d-none');
                    $('#iNum').val('');
                    $('#iABTest').val('');
                    $('#frmchapter .js-switch').each(function () {
                        if (this.checked) {
                            this.checked = false;
                            this.dispatchEvent(new Event('change'));
                        }
                    });

                    // Reset the iFirstSubModule dropdown to show default options
                    $('#iFirstSubModule').val('');

                    // Reset submit button text
                    $('#btn-submit').text('Create');
                }

                // Set up delete confirmation modal (use event delegation for DataTables pagination)
                $('#datatableChapters').on('click', '.chapterdelete', function() {
                    var id = $(this).data('id');
                    var title = $(this).data('title');
                    $('#chapterTitle').text(title);
                    $('#deleteForm').attr('action', "{{ route('chapter.index', $programId) }}/" + id);
                    $('#deleteModal').modal('show');
                });
                // Toggle active status via AJAX (use event delegation for DataTables pagination)
                $('#datatableChapters').on('change', '.active-toggle', function(e) {
                    const $checkbox = $(this);

                    // prevent double click
                    if ($checkbox.data('loading')) {
                        e.preventDefault();
                        e.stopImmediatePropagation();
                        return false;
                    }
                    $checkbox.data('loading', true);

                    const id = $checkbox.data('id');
                    const isChecked = $checkbox.prop('checked');

                    // Find the switchery wrapper (span.switchery) next to the checkbox
                    const $switchWrapper = $checkbox.next('.switchery');

                    if ($switchWrapper.length) {
                        $switchWrapper.hide();
                        $switchWrapper.after('<i class="fa fa-spinner fa-spin text-muted switch-spinner" data-id="' + id + '"></i>');
                    }

                    // Send AJAX request
                    $.ajax({
                        url: "{{ route('chapter.activeToggle', ['program_id' => $programId, 'id' => '__ID__']) }}".replace('__ID__', id),
                        type: 'POST',
                        headers: {
                            'X-CSRF-TOKEN': $('meta[name="csrf-token"]').attr('content')
                        },
                        // Send the desired final state so the endpoint is idempotent
                        data: { bActive: isChecked ? 1 : 0 },
                        dataType: 'json',
                        success: function(response) {
                            if (response.success) {
                                $checkbox.prop('checked', response.bActive ? true : false);
                                showNotification('Chapter status updated successfully', 'success');
                            } else {
                                $checkbox.prop('checked', !isChecked);
                                showNotification('Unable to update chapter status', 'danger');
                            }
                        },
                        error: function(xhr, status, error) {
                            console.error('Error toggling chapter status:', error);
                            $checkbox.prop('checked', !isChecked);
                            showNotification('Error updating chapter status. Please try again.', 'danger');
                        },
                        complete: function() {
                            $checkbox.data('loading', false);
                            $('.switch-spinner[data-id="' + id + '"]').remove();
                            // Rebuild Switchery so the visual switch matches the checkbox's
                            // current checked state (reverts the toggle on failure/error).
                            refreshSwitchery($checkbox[0]);
                        }
                    });
                });

                // `showNotification` is defined globally in resources/js/app.js.

                // Initialize Fancybox
                Fancybox.bind("[data-fancybox]", {
                    // Custom options if needed
                });
            } else {
                console.error('jQuery is not loaded properly');
            }
        }
    </script>
@endpush