{% load static %}

<div x-data="photoUpload({
    contentType: '{{ content_type }}',
    objectId: {{ object_id }},
    csrfToken: '{{ csrf_token }}',
    uploadUrl: '{% url "photos:upload" %}',
    maxFiles: {{ max_files|default:5 }},
    initialPhotos: [
        {% for photo in photos %}
            {
                id: {{ photo.id }},
                url: '{{ photo.image.url }}',
                caption: '{{ photo.caption|default:""|escapejs }}',
                is_primary: {{ photo.is_primary|yesno:"true,false" }}
            }{% if not forloop.last %},{% endif %}
        {% endfor %}
    ]
})" class="w-full">
    <!-- Photo Upload Button -->
    <div class="flex items-center justify-between mb-4">
        <h3 class="text-lg font-semibold text-gray-900 dark:text-white">Photos</h3>
        <template x-if="canAddMorePhotos">
            <label class="cursor-pointer btn-secondary">
                <i class="mr-2 fas fa-camera"></i>
                <span>Upload Photo</span>
                <input type="file" 
                       class="hidden" 
                       accept="image/*" 
                       @change="handleFileSelect"
                       multiple>
            </label>
        </template>
    </div>

    <!-- Upload Progress -->
    <template x-if="uploading">
        <div class="mb-4">
            <div class="flex items-center justify-between mb-1">
                <span class="text-sm text-gray-700 dark:text-gray-300">Uploading...</span>
                <span class="text-sm text-gray-700 dark:text-gray-300" x-text="uploadProgress + '%'"></span>
            </div>
            <div class="w-full bg-gray-200 rounded-full h-2.5 dark:bg-gray-700">
                <div class="bg-blue-600 h-2.5 rounded-full transition-all duration-300"
                     :style="'width: ' + uploadProgress + '%'"></div>
            </div>
        </div>
    </template>

    <!-- Error Messages -->
    <template x-if="error">
        <div class="p-4 mb-4 text-sm text-red-800 bg-red-100 rounded-lg dark:bg-red-200 dark:text-red-800" 
             x-text="error"></div>
    </template>

    <!-- Photo Grid -->
    <div class="grid grid-cols-2 gap-4 md:grid-cols-3 lg:grid-cols-4" x-show="photos.length > 0">
        <template x-for="photo in photos" :key="photo.id">
            <div class="relative group aspect-w-16 aspect-h-9">
                <img :src="photo.url" 
                     :alt="photo.caption || ''"
                     class="object-cover rounded-lg">
                
                <!-- Overlay Controls -->
                <div class="absolute inset-0 flex items-center justify-center transition-opacity rounded-lg opacity-0 bg-black/50 group-hover:opacity-100">
                    <!-- Primary Photo Toggle -->
                    <button @click="togglePrimary(photo)" 
                            class="p-2 mx-1 text-white bg-blue-600 rounded-full hover:bg-blue-700"
                            :class="{ 'bg-yellow-500 hover:bg-yellow-600': photo.is_primary }">
                        <i class="fas" :class="photo.is_primary ? 'fa-star' : 'fa-star-o'"></i>
                    </button>
                    
                    <!-- Edit Caption -->
                    <button @click="editCaption(photo)"
                            class="p-2 mx-1 text-white bg-blue-600 rounded-full hover:bg-blue-700">
                        <i class="fas fa-edit"></i>
                    </button>
                    
                    <!-- Delete Photo -->
                    <button @click="deletePhoto(photo)"
                            class="p-2 mx-1 text-white bg-red-600 rounded-full hover:bg-red-700">
                        <i class="fas fa-trash"></i>
                    </button>
                </div>
            </div>
        </template>
    </div>

    <!-- No Photos Message -->
    <template x-if="photos.length === 0">
        <div class="py-8 text-center text-gray-500 dark:text-gray-400">
            No photos available. Click the upload button to add photos.
        </div>
    </template>

    <!-- Caption Edit Modal -->
    <div x-show="showCaptionModal" 
         class="fixed inset-0 z-50 flex items-center justify-center bg-black/50"
         @click.self="showCaptionModal = false">
        <div class="w-full max-w-md p-6 bg-white rounded-lg shadow-xl dark:bg-gray-800">
            <h3 class="mb-4 text-lg font-semibold text-gray-900 dark:text-white">Edit Photo Caption</h3>
            <input type="text" 
                   x-model="editingPhoto.caption" 
                   class="w-full p-2 mb-4 border rounded-lg dark:bg-gray-700 dark:border-gray-600 dark:text-white"
                   placeholder="Enter caption">
            <div class="flex justify-end gap-2">
                <button @click="showCaptionModal = false" 
                        class="btn-secondary">Cancel</button>
                <button @click="saveCaption" 
                        class="btn-primary">Save</button>
            </div>
        </div>
    </div>
</div>

<!-- AlpineJS Component Script -->
<script>
document.addEventListener('alpine:init', () => {
    Alpine.data('photoUpload', ({ contentType, objectId, csrfToken, uploadUrl, maxFiles, initialPhotos }) => ({
        photos: initialPhotos || [],
        uploading: false,
        uploadProgress: 0,
        error: null,
        showCaptionModal: false,
        editingPhoto: { caption: '' },

        get canAddMorePhotos() {
            return this.photos.length < maxFiles;
        },

        async handleFileSelect(event) {
            const files = Array.from(event.target.files);
            if (!files.length) return;

            if (this.photos.length + files.length > maxFiles) {
                this.error = `You can only upload up to ${maxFiles} photos`;
                return;
            }

            this.uploading = true;
            this.uploadProgress = 0;
            this.error = null;

            const totalFiles = files.length;
            let completedFiles = 0;

            for (const file of files) {
                const formData = new FormData();
                formData.append('image', file);
                formData.append('app_label', contentType.split('.')[0]);
                formData.append('model', contentType.split('.')[1]);
                formData.append('object_id', objectId);

                try {
                    const response = await fetch(uploadUrl, {
                        method: 'POST',
                        headers: {
                            'X-CSRFToken': csrfToken,
                        },
                        body: formData
                    });

                    if (!response.ok) {
                        const data = await response.json();
                        throw new Error(data.error || 'Upload failed');
                    }

                    const photo = await response.json();
                    this.photos.push(photo);
                    completedFiles++;
                    this.uploadProgress = (completedFiles / totalFiles) * 100;
                } catch (err) {
                    this.error = err.message || 'Failed to upload photo. Please try again.';
                    console.error('Upload error:', err);
                }
            }

            this.uploading = false;
            event.target.value = ''; // Reset file input
        },

        async togglePrimary(photo) {
            try {
                const response = await fetch(`${uploadUrl}${photo.id}/primary/`, {  // Added trailing slash
                    method: 'POST',
                    headers: {
                        'X-CSRFToken': csrfToken,
                        'Content-Type': 'application/json',
                    }
                });

                if (!response.ok) {
                    throw new Error('Failed to update primary photo');
                }

                // Update local state
                this.photos = this.photos.map(p => ({
                    ...p,
                    is_primary: p.id === photo.id
                }));
            } catch (err) {
                this.error = err.message || 'Failed to update primary photo';
                console.error('Primary photo update error:', err);
            }
        },

        editCaption(photo) {
            this.editingPhoto = { ...photo };
            this.showCaptionModal = true;
        },

        async saveCaption() {
            try {
                const response = await fetch(`${uploadUrl}${this.editingPhoto.id}/caption/`, {  // Added trailing slash
                    method: 'POST',
                    headers: {
                        'X-CSRFToken': csrfToken,
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({
                        caption: this.editingPhoto.caption
                    })
                });

                if (!response.ok) {
                    throw new Error('Failed to update caption');
                }

                // Update local state
                this.photos = this.photos.map(p => 
                    p.id === this.editingPhoto.id 
                        ? { ...p, caption: this.editingPhoto.caption }
                        : p
                );

                this.showCaptionModal = false;
                this.editingPhoto = { caption: '' };
            } catch (err) {
                this.error = err.message || 'Failed to update caption';
                console.error('Caption update error:', err);
            }
        },

        async deletePhoto(photo) {
            if (!confirm('Are you sure you want to delete this photo?')) {
                return;
            }

            try {
                const response = await fetch(`${uploadUrl}${photo.id}/`, {  // Added trailing slash
                    method: 'DELETE',
                    headers: {
                        'X-CSRFToken': csrfToken,
                    }
                });

                if (!response.ok) {
                    throw new Error('Failed to delete photo');
                }

                // Update local state
                this.photos = this.photos.filter(p => p.id !== photo.id);
            } catch (err) {
                this.error = err.message || 'Failed to delete photo';
                console.error('Delete error:', err);
            }
        }
    }));
});
</script>