@include('Partials.sidebar')

<section class="main_content dashboard_part large_header_bg">

    @include('Partials.header')

    <div class="main_content_iner default_main_contaner_iner">

        @if ($errors->any())
            <div>
                <ul>
                    @foreach ($errors->all() as $error)
                        <li>{{ $error }}</li>
                    @endforeach
                </ul>
            </div>
        @endif

        @if (session('error'))
            <div class="alert alert-danger">{{ session('error') }}</div>
        @endif

        <div class="page-body">
            <div class="container-fluid">
                <div class="page-title">
                    <div class="row">
                        <div class="col-md-6 ps-0">
                            <h3>Construction Updates</h3>
                        </div>
                        <div class="col-md-6 ps-0">
                            <a href="/construction-update/dashboard" class="btn btn-primary">View All</a>
                        </div>
                    </div>
                </div>
            </div>

            <div class="container-fluid">
                <div class="row">
                    <div class="col-md-12">
                        <div class="location-form" style="width: 100%">

                            <div class="location-form-header">
                                <h3>Construction Updates</h3>
                            </div>
                            <div class="location-form-body">
                                <form id="home_banner_section_form"
                                    action="{{ url('/construction-update/update/' . $constructions->id) }}"
                                    method="POST" enctype="multipart/form-data">
                                    @csrf
                                    @method('PUT')
                                    <div class="row">
                                        <div class="col-xl-12 col-sm-6">
                                            <div class="form-group">
                                                <label for="banner_title">Banner Title:</label>
                                                <input type="text" id="banner_title" name="banner_title"
                                                    class="form-control" required
                                                    value="{{ $constructions->banner_title }}">
                                            </div>
                                        </div>
                                        <div class="col-xl-12 col-sm-6">
                                            <div class="form-group">
                                                <label for="banner_image" class="form-label">Choose a Banner
                                                    Image:</label><br>
                                                <label> *Dimension: 1920px X 957px</label>
                                                <div style="margin-top: 10px;">
                                                    <div class="image-preview"
                                                        onclick="document.getElementById('banner_image').click();">
                                                        <img id="preview-0"
                                                            src="{{ $constructions->banner_image ? asset($constructions->banner_image) : '' }}"
                                                            alt="Image Preview"
                                                            style="max-width: 200px; display: {{ $constructions->banner_image ? 'block' : 'none' }};" />
                                                    </div><br>
                                                    <label for="banner_image" class="custom-file-upload">
                                                        <i class="fas fa-cloud-upload-alt"></i> Choose Image
                                                    </label>
                                                    <input id="banner_image" class="file_input" type="file"
                                                        name="banner_image" accept=".png, .jpg, .jpeg, .webp"
                                                        onchange="previewImage(this, 0, 1920, 957, 'The Banner image must be 1920px x 957px.')" />
                                                </div>
                                                <input type="hidden" id="existing_constructions_banner_image"
                                                    value="{{ $constructions->banner_image }}">
                                            </div>
                                        </div>

                                        <div class="col-xl-12 col-sm-6">
                                            <label>Construction Update Slides:</label>
                                            <p class="text-muted" style="margin-bottom:10px;">
                                                Upload either an image (1420px X 840px) or a video per slide.
                                                Video slides require a separate thumbnail image.
                                                Leave a slide's file blank to keep its current media.
                                            </p>
                                            <div id="construction_updates_slides_container">
                                                @php
                                                    $existingSlides = json_decode($constructions->slide_images, true) ?? [];
                                                    $existingThumbs = json_decode($constructions->thumb_images, true) ?? [];
                                                @endphp

                                                @if (count($existingSlides) > 0)
                                                    @foreach ($existingSlides as $index => $slide)
                                                        @php
                                                            $slideVideo = $slide['construction_video'] ?? null;
                                                            $slideImage = $slide['construction_image'] ?? null;
                                                            $slideThumb = $existingThumbs[$index]['construction_thumb'] ?? null;
                                                        @endphp
                                                        <div class="border-box construction_updates_slides" data-index="{{ $index }}">
                                                            <div class="row">
                                                                <div class="col-xl-12 col-sm-6">
                                                                    <div class="form-group">
                                                                        <label>Slide Media (Image or Video):</label>
                                                                        <div style="margin-top: 10px;">
                                                                            <div class="image-preview slide-image-preview-wrapper"
                                                                                onclick="document.getElementById('slide_file-{{ $index }}').click();">
                                                                                <img id="slide_file-preview-{{ $index }}"
                                                                                    src="{{ $slideImage ? asset($slideImage) : '' }}"
                                                                                    alt="Preview"
                                                                                    style="max-width: 200px; display: {{ $slideImage ? 'block' : 'none' }};" />
                                                                                <video id="slide_file-video-preview-{{ $index }}"
                                                                                    src="{{ $slideVideo ? asset($slideVideo) : '' }}"
                                                                                    style="max-width: 200px; display: {{ $slideVideo ? 'block' : 'none' }};"
                                                                                    controls muted></video>
                                                                            </div><br>
                                                                            <label for="slide_file-{{ $index }}" class="custom-file-upload">
                                                                                <i class="fas fa-cloud-upload-alt"></i> Replace Image/Video
                                                                            </label>
                                                                            <input id="slide_file-{{ $index }}" class="file_input"
                                                                                type="file"
                                                                                name="construction_updates_slides[{{ $index }}][file]"
                                                                                accept=".png,.jpg,.jpeg,.webp,.mp4,.mov,.webm,.ogg"
                                                                                onchange="handleSlideFileChange(this, {{ $index }})" />
                                                                        </div>
                                                                    </div>
                                                                </div>
                                                                <div class="col-xl-12 col-sm-6 slide-thumb-wrapper"
                                                                    id="slide_thumb_wrapper-{{ $index }}"
                                                                    style="display: {{ $slideVideo ? 'block' : 'none' }};">
                                                                    <div class="form-group">
                                                                        <label>Thumbnail Image for this video:</label>
                                                                        <div style="margin-top: 10px;">
                                                                            <div class="image-preview"
                                                                                onclick="document.getElementById('slide_thumb-{{ $index }}').click();">
                                                                                <img id="slide_thumb-preview-{{ $index }}"
                                                                                    src="{{ $slideVideo && $slideThumb ? asset($slideThumb) : '' }}"
                                                                                    alt="Thumb Preview"
                                                                                    style="max-width: 150px; display: {{ $slideVideo && $slideThumb ? 'block' : 'none' }};" />
                                                                            </div><br>
                                                                            <label for="slide_thumb-{{ $index }}" class="custom-file-upload">
                                                                                <i class="fas fa-cloud-upload-alt"></i> Choose Thumbnail
                                                                            </label>
                                                                            <input id="slide_thumb-{{ $index }}" class="file_input"
                                                                                type="file"
                                                                                name="construction_updates_slides[{{ $index }}][thumb]"
                                                                                accept=".png,.jpg,.jpeg,.webp"
                                                                                onchange="previewThumb(this, {{ $index }})" />
                                                                        </div>
                                                                    </div>
                                                                </div>
                                                            </div>

                                                            {{-- Hidden fields preserve current media so the server knows what to keep if no new file is chosen --}}
                                                            <input type="hidden"
                                                                name="construction_updates_slides[{{ $index }}][existing_image]"
                                                                value="{{ $slideImage }}">
                                                            <input type="hidden"
                                                                name="construction_updates_slides[{{ $index }}][existing_video]"
                                                                value="{{ $slideVideo }}">
                                                            <input type="hidden"
                                                                name="construction_updates_slides[{{ $index }}][existing_thumb]"
                                                                value="{{ $slideThumb }}">

                                                            <button type="button" class="btn btn-danger remove-slide"
                                                                onclick="removeConstructionUpdatesSlide(this)">Remove</button>
                                                        </div>
                                                    @endforeach
                                                @else
                                                    <div class="border-box construction_updates_slides" data-index="0">
                                                        <div class="row">
                                                            <div class="col-xl-12 col-sm-6">
                                                                <div class="form-group">
                                                                    <label>Slide Media (Image or Video):</label>
                                                                    <div style="margin-top: 10px;">
                                                                        <div class="image-preview slide-image-preview-wrapper"
                                                                            onclick="document.getElementById('slide_file-0').click();">
                                                                            <img id="slide_file-preview-0" src=""
                                                                                alt="Preview" style="max-width: 200px; display: none;" />
                                                                            <video id="slide_file-video-preview-0"
                                                                                style="max-width: 200px; display: none;" controls muted></video>
                                                                        </div><br>
                                                                        <label for="slide_file-0" class="custom-file-upload">
                                                                            <i class="fas fa-cloud-upload-alt"></i> Choose Image/Video
                                                                        </label>
                                                                        <input id="slide_file-0" class="file_input" type="file"
                                                                            name="construction_updates_slides[0][file]"
                                                                            accept=".png,.jpg,.jpeg,.webp,.mp4,.mov,.webm,.ogg"
                                                                            onchange="handleSlideFileChange(this, 0)" />
                                                                    </div>
                                                                </div>
                                                            </div>
                                                            <div class="col-xl-12 col-sm-6 slide-thumb-wrapper"
                                                                id="slide_thumb_wrapper-0" style="display:none;">
                                                                <div class="form-group">
                                                                    <label>Thumbnail Image for this video:</label>
                                                                    <div style="margin-top: 10px;">
                                                                        <div class="image-preview"
                                                                            onclick="document.getElementById('slide_thumb-0').click();">
                                                                            <img id="slide_thumb-preview-0" src=""
                                                                                alt="Thumb Preview" style="max-width: 150px; display: none;" />
                                                                        </div><br>
                                                                        <label for="slide_thumb-0" class="custom-file-upload">
                                                                            <i class="fas fa-cloud-upload-alt"></i> Choose Thumbnail
                                                                        </label>
                                                                        <input id="slide_thumb-0" class="file_input" type="file"
                                                                            name="construction_updates_slides[0][thumb]"
                                                                            accept=".png,.jpg,.jpeg,.webp"
                                                                            onchange="previewThumb(this, 0)" />
                                                                    </div>
                                                                </div>
                                                            </div>
                                                        </div>
                                                        <input type="hidden" name="construction_updates_slides[0][existing_image]" value="">
                                                        <input type="hidden" name="construction_updates_slides[0][existing_video]" value="">
                                                        <input type="hidden" name="construction_updates_slides[0][existing_thumb]" value="">
                                                        <button type="button" class="btn btn-danger remove-slide"
                                                            onclick="removeConstructionUpdatesSlide(this)">Remove</button>
                                                    </div>
                                                @endif
                                            </div>
                                            <button type="button" class="btn btn-success"
                                                id="add-new-construction-updates-slide">Add New</button><br /><br />
                                        </div>

                                        <div class="col-xl-12 col-sm-6">
                                            <div class="form-group">
                                                <label for="slug">Slug:</label>
                                                <input type="text" id="slug" name="slug" class="form-control" required
                                                    value="{{ $constructions->slug }}">
                                            </div>
                                        </div>
                                    </div>

                                    <button class="btn btn-primary" type="submit">Update</button>
                                </form>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

</section>

<script>
    function previewCustomImage(input, previewId, requiredWidth, requiredHeight, errorMsg) {
        if (input.files && input.files[0]) {
            const file = input.files[0];
            const img = new Image();
            const reader = new FileReader();
            const objectURL = URL.createObjectURL(file);
            const preview = document.getElementById(previewId);
            const oldImageSrc = preview.src;

            img.onload = function () {
                if (requiredWidth && requiredHeight && (img.width !== requiredWidth || img.height !== requiredHeight)) {
                    alert(errorMsg);
                    preview.src = oldImageSrc;
                    input.value = "";
                } else {
                    reader.onload = function (e) {
                        preview.src = e.target.result;
                        preview.style.display = "block";
                    };
                    reader.readAsDataURL(file);
                }
                URL.revokeObjectURL(objectURL);
            };
            img.onerror = function () {
                alert("Invalid image file.");
                preview.src = oldImageSrc;
                input.value = "";
                URL.revokeObjectURL(objectURL);
            };
            img.src = objectURL;
        }
    }

    function previewImage(input, index, requiredWidth, requiredHeight, errorMsg) {
        previewCustomImage(input, `preview-${index}`, requiredWidth, requiredHeight, errorMsg);
    }

    function previewThumb(input, index) {
        previewCustomImage(input, `slide_thumb-preview-${index}`, null, null, '');
    }

    function handleSlideFileChange(input, index) {
        const file = input.files[0];
        const imgPreview = document.getElementById(`slide_file-preview-${index}`);
        const videoPreview = document.getElementById(`slide_file-video-preview-${index}`);
        const thumbWrapper = document.getElementById(`slide_thumb_wrapper-${index}`);
        if (!file) return;

        const isVideo = file.type.startsWith('video/');
        const objectURL = URL.createObjectURL(file);

        if (isVideo) {
            imgPreview.style.display = 'none';
            videoPreview.src = objectURL;
            videoPreview.style.display = 'block';
            thumbWrapper.style.display = 'block';
        } else {
            videoPreview.style.display = 'none';
            videoPreview.removeAttribute('src');
            thumbWrapper.style.display = 'none';
            previewCustomImage(input, `slide_file-preview-${index}`, 1420, 840,
                'The Construction Updates Slide Image must be 1420px x 840px.');
        }
    }

    window.removeConstructionUpdatesSlide = function (button) {
        const wrapper = button.closest('.construction_updates_slides');
        if (document.querySelectorAll('.construction_updates_slides').length <= 1) {
            alert('At least one slide is required.');
            return;
        }
        wrapper.remove();
    };

    jQuery(document).ready(function ($) {
        // Continue new indices after the highest existing one, to avoid collisions
        let existingIndices = Array.from(document.querySelectorAll('.construction_updates_slides'))
            .map(el => parseInt(el.dataset.index, 10))
            .filter(n => !isNaN(n));
        let slideIndex = existingIndices.length > 0 ? Math.max(...existingIndices) + 1 : 1;

        function slideTemplate(index) {
            return `
                <div class="row">
                    <div class="col-xl-12 col-sm-6">
                        <div class="form-group">
                            <label>Slide Media (Image or Video):</label>
                            <div style="margin-top: 10px;">
                                <div class="image-preview slide-image-preview-wrapper"
                                    onclick="document.getElementById('slide_file-${index}').click();">
                                    <img id="slide_file-preview-${index}" src="" alt="Preview"
                                        style="max-width: 200px; display: none;" />
                                    <video id="slide_file-video-preview-${index}"
                                        style="max-width: 200px; display: none;" controls muted></video>
                                </div><br>
                                <label for="slide_file-${index}" class="custom-file-upload">
                                    <i class="fas fa-cloud-upload-alt"></i> Choose Image/Video
                                </label>
                                <input id="slide_file-${index}" class="file_input" type="file"
                                    name="construction_updates_slides[${index}][file]"
                                    accept=".png,.jpg,.jpeg,.webp,.mp4,.mov,.webm,.ogg"
                                    onchange="handleSlideFileChange(this, ${index})" />
                            </div>
                        </div>
                    </div>
                    <div class="col-xl-12 col-sm-6 slide-thumb-wrapper"
                        id="slide_thumb_wrapper-${index}" style="display:none;">
                        <div class="form-group">
                            <label>Thumbnail Image for this video:</label>
                            <div style="margin-top: 10px;">
                                <div class="image-preview"
                                    onclick="document.getElementById('slide_thumb-${index}').click();">
                                    <img id="slide_thumb-preview-${index}" src="" alt="Thumb Preview"
                                        style="max-width: 150px; display: none;" />
                                </div><br>
                                <label for="slide_thumb-${index}" class="custom-file-upload">
                                    <i class="fas fa-cloud-upload-alt"></i> Choose Thumbnail
                                </label>
                                <input id="slide_thumb-${index}" class="file_input" type="file"
                                    name="construction_updates_slides[${index}][thumb]"
                                    accept=".png,.jpg,.jpeg,.webp"
                                    onchange="previewThumb(this, ${index})" />
                            </div>
                        </div>
                    </div>
                </div>
                <input type="hidden" name="construction_updates_slides[${index}][existing_image]" value="">
                <input type="hidden" name="construction_updates_slides[${index}][existing_video]" value="">
                <input type="hidden" name="construction_updates_slides[${index}][existing_thumb]" value="">
                <button type="button" class="btn btn-danger remove-slide"
                    onclick="removeConstructionUpdatesSlide(this)">Remove</button>
            `;
        }

        document.getElementById('add-new-construction-updates-slide').addEventListener('click', function () {
            const container = document.getElementById('construction_updates_slides_container');
            const newSlide = document.createElement('div');
            newSlide.className = 'border-box construction_updates_slides';
            newSlide.dataset.index = slideIndex;
            newSlide.innerHTML = slideTemplate(slideIndex);
            container.appendChild(newSlide);
            slideIndex++;
        });

        $('#home_banner_section_form').validate({
            rules: {
                banner_title: { required: true },
                banner_image: {
                    required: function () {
                        const existing = $('#existing_constructions_banner_image').val().trim();
                        return !existing;
                    }
                },
                slug: { required: true },
            },
            messages: {
                banner_title: { required: "Please enter Banner Title" },
                banner_image: { required: "Please choose a Banner image." },
                slug: { required: "Please enter Slug." },
            },
            errorPlacement: function (error, element) {
                error.insertAfter(element);
            },
            submitHandler: function (form) {
                // Each slide row must have EITHER a new file OR existing media retained
                let missingMedia = false;
                let missingThumb = false;

                document.querySelectorAll('.construction_updates_slides').forEach(function (wrapper) {
                    const index = wrapper.dataset.index;
                    const fileInput = document.getElementById(`slide_file-${index}`);
                    const thumbInput = document.getElementById(`slide_thumb-${index}`);
                    const existingImage = wrapper.querySelector(`[name="construction_updates_slides[${index}][existing_image]"]`)?.value;
                    const existingVideo = wrapper.querySelector(`[name="construction_updates_slides[${index}][existing_video]"]`)?.value;
                    const existingThumb = wrapper.querySelector(`[name="construction_updates_slides[${index}][existing_thumb]"]`)?.value;

                    const hasNewFile = fileInput && fileInput.files[0];
                    const hasExisting = existingImage || existingVideo;

                    if (!hasNewFile && !hasExisting) {
                        missingMedia = true;
                        return;
                    }

                    const isVideoSelected = hasNewFile
                        ? fileInput.files[0].type.startsWith('video/')
                        : !!existingVideo;

                    if (isVideoSelected) {
                        const hasNewThumb = thumbInput && thumbInput.files[0];
                        if (!hasNewThumb && !existingThumb) {
                            missingThumb = true;
                        }
                    }
                });

                if (missingMedia) {
                    alert('Every slide needs an image or video.');
                    return;
                }
                if (missingThumb) {
                    alert('Please upload a thumbnail image for every video slide.');
                    return;
                }

                form.submit();
            }
        });
    });
</script>

@include('Partials.footer')