@include('header')

<style>
#drop-area {
    border: 2px dashed #6c757d;
    border-radius: 12px;
    padding: 30px;
    background: #f8f9fa;
    text-align: center;
    cursor: pointer;
    transition: 0.3s;
}

#drop-area.dragover {
    background: #e7f1ff;
    border-color: #0d6efd;
}

#drop-area .browse {
    color: #0d6efd;
    font-weight: 600;
    text-decoration: underline;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    margin-top: 15px;
}

.preview-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

.preview-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
}

.preview-item span {
    position: absolute;
    top: 6px;
    right: 6px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    text-align: center;
    line-height: 22px;
    cursor: pointer;
}
</style>

<div class="content-body">
    <div class="page-titles">
        <h5 class="dashboard_bar">coordinator Information</h5>
        <ul class="breadcrumb">
            <li class="breadcrumb-item"><a href="#">Dashboard</a></li>
            <li class="breadcrumb-item active"><a href="javascript:void(0)">Edit coordinator</a></li>
        </ul>
    </div>

    <div class="container">
        <div class="row">
            <div class="col-lg-12">
                <div class="card">
                    <div class="card-header">
                        <h4 class="card-title">coordinator</h4>
                    </div>
                    <div class="card-body">
                        <div class="form-validation">
                            <form id="coordinatorForm" class="needs-validation" enctype="multipart/form-data" novalidate>
                                @csrf
                                @if(isset($coordinator->id))
                                    @method('PUT')
                                @endif

                                <div class="row">
                                    <div class="col-xl-6">

                                        <!-- coordinator Type -->
                                        <div class="mb-3 row">
                                            <label class="col-lg-4 col-form-label">coordinator Type <span class="text-danger">*</span></label>
                                            <div class="col-lg-8">
                                                <select name="type" class="form-control" required>
                                                    <option value="">Select Type</option>
                                                    <option value="nss" {{ isset($coordinator->type) && $coordinator->type=='nss' ? 'selected' : '' }}>NSS</option>
                                                    <option value="ncc" {{ isset($coordinator->type) && $coordinator->type=='ncc' ? 'selected' : '' }}>NCC</option>
                                                    <option value="redribbon" {{ isset($coordinator->type) && $coordinator->type=='redribbon' ? 'selected' : '' }}>Red Ribbon</option>
                                                </select>
                                            </div>
                                        </div>

                                        <!-- Faculty Selection -->
                                        <div class="mb-3 row">
                                            <label class="col-lg-4 col-form-label">Select Coordinators <span class="text-danger">*</span></label>
                                            <div class="col-lg-8">
                                                <select name="faculty_ids[]" id="faculty_ids" class="form-control" multiple required>
                                                    @foreach($faculties as $faculty)
                                                        <option value="{{ $faculty->id }}" 
                                                            {{ isset($coordinator->faculty_ids) && in_array($faculty->id, $coordinator->faculty_ids) ? 'selected' : '' }}>
                                                            {{ $faculty->name }}
                                                        </option>
                                                    @endforeach
                                                </select>
                                            </div>
                                        </div>

                                        <!-- coordinator Images -->
                                        <div class="mb-3 row">
                                            <label class="col-lg-4 col-form-label">coordinator Images</label>
                                            <div class="col-lg-8">
                                                <div id="drop-area">
                                                    <p>Drag & drop images here<br>or<br><span class="browse">Click to select</span></p>
                                                    <input type="file" id="images" name="images[]" multiple accept="image/*" hidden>
                                                </div>

                                                <div id="preview" class="preview-grid">
                                                    <!-- Existing images -->
                                                    @if(!empty($coordinator->images))
                                                        @foreach($coordinator->images as $img)
                                                            <div class="preview-item" data-is-new="false">
                                                                <img src="{{ asset($img) }}">
                                                                <span class="remove-existing">&times;</span>
                                                                <input type="hidden" name="old_images[]" value="{{ $img }}">
                                                            </div>
                                                        @endforeach
                                                    @endif
                                                </div>
                                            </div>
                                        </div>

                                        <!-- Submit -->
                                        <div class="mb-3 row">
                                            <div class="col-lg-8 ms-auto">
                                                <button type="submit" class="btn btn-primary">Save</button>
                                            </div>
                                        </div>

                                    </div>
                                </div>
                            </form>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

@include('footer')

<script>
    $('#faculty_ids').select2({
    placeholder: "Search faculty...",
    allowClear: true,
    width: '100%'
});
$(document).ready(function() {
    const dropArea = document.getElementById('drop-area');
    const input = document.getElementById('images');
    const preview = document.getElementById('preview');
    let selectedFiles = [];

    // --- Drag & Drop / Click ---
    dropArea.addEventListener('click', () => input.click());
    dropArea.addEventListener('dragover', e => { e.preventDefault(); dropArea.classList.add('dragover'); });
    dropArea.addEventListener('dragleave', () => dropArea.classList.remove('dragover'));
    dropArea.addEventListener('drop', e => { e.preventDefault(); dropArea.classList.remove('dragover'); addFiles(e.dataTransfer.files); });

    input.addEventListener('change', () => { addFiles(input.files); input.value = ''; });

    function addFiles(files) {
        Array.from(files).forEach(file => {
            if(!file.type.startsWith('image/')) return;
            const fileId = 'file-' + Date.now() + '-' + Math.random().toString(36).substr(2,5);
            file.fileId = fileId;
            selectedFiles.push(file);
            previewNewImage(file);
        });
    }

    function previewNewImage(file) {
        const reader = new FileReader();
        reader.onload = e => {
            const div = document.createElement('div');
            div.className = 'preview-item';
            div.dataset.isNew = 'true';
            div.dataset.fileId = file.fileId;
            div.innerHTML = `<img src="${e.target.result}"><span class="remove-new">&times;</span>`;
            preview.appendChild(div);
        };
        reader.readAsDataURL(file);
    }

    // --- Remove new file ---
    $(document).on('click', '.remove-new', function() {
        const parent = this.parentElement;
        const fileId = parent.dataset.fileId;
        selectedFiles = selectedFiles.filter(f => f.fileId !== fileId);
        parent.remove();
    });

    // --- Remove existing image ---
    $(document).on('click', '.remove-existing', function() {
        const parent = $(this).closest('.preview-item');
        const oldInput = parent.find('input[type="hidden"]');
        const removedInput = $('<input>').attr('type','hidden').attr('name','removed_images[]').val(oldInput.val());
        $('#coordinatorForm').append(removedInput);
        parent.remove();
    });

    // --- Form Submission ---
    $('#coordinatorForm').on('submit', function(e) {
        e.preventDefault();
        let formData = new FormData(this);

        // Append new files
        selectedFiles.forEach(file => { formData.append('images[]', file); });

        // Spoof PUT if editing
        @if(isset($coordinator->id))
            formData.append('_method','PUT');
        @endif

        $.ajax({
            url: "{{ isset($coordinator) ? route('coordinators.update', $coordinator->id) : route('coordinators.store') }}",
            method: "POST",
            data: formData,
            processData: false,
            contentType: false,
            success: function(response) {
                Swal.fire({
                    icon: 'success',
                    title: 'Success!',
                    text: response.message,
                    timer: 2000,
                    showConfirmButton: true
                }).then(() => { window.location.href = '{{ route("coordinators.manage") }}'; });
            },
            error: function(xhr) {
                $('.text-danger').text('');
                if(xhr.status === 422) {
                    $.each(xhr.responseJSON.errors, function(key, value){
                        $('.error-' + key).text(value[0]);
                    });
                } else {
                    Swal.fire({icon:'error', title:'Error!', text:'Something went wrong.'});
                }
            }
        });
    });
});
</script>