class ReviewSystem {
    constructor() {
        this.reviewForm = document.getElementById('review-form');
        this.reviewsContainer = document.getElementById('reviews-container');
        this.ratingInput = document.getElementById('rating-input');
        
        this.initializeReviews();
    }

    initializeReviews() {
        // تهيئة نظام التقييم بالنجوم
        this.initializeStarRating();
        
        // معالجة إرسال المراجعة
        this.reviewForm?.addEventListener('submit', (e) => this.handleReviewSubmit(e));
        
        // تهيئة فلترة المراجعات
        this.initializeReviewFilters();
        
        // تحميل المراجعات الحالية
        this.loadReviews();
    }

    initializeStarRating() {
        const ratingStars = document.querySelectorAll('.rating-stars i');
        
        ratingStars.forEach((star, index) => {
            star.addEventListener('mouseover', () => {
                this.updateStars(ratingStars, index);
            });

            star.addEventListener('click', () => {
                this.ratingInput.value = index + 1;
                star.classList.add('selected');
            });
        });

        // إعادة تعيين النجوم عند إزالة المؤشر
        document.querySelector('.rating-stars')?.addEventListener('mouseleave', () => {
            this.updateStars(ratingStars, this.ratingInput.value - 1);
        });
    }

    updateStars(stars, activeIndex) {
        stars.forEach((star, index) => {
            star.classList.toggle('active', index <= activeIndex);
        });
    }

    async handleReviewSubmit(e) {
        e.preventDefault();
        const formData = new FormData(e.target);
        
        try {
            const response = await fetch('/api/reviews.php', {
                method: 'POST',
                body: formData
            });

            if (!response.ok) throw new Error('فشل إرسال المراجعة');

            const review = await response.json();
            this.addReviewToDOM(review);
            this.showNotification('تم إضافة مراجعتك بنجاح');
            e.target.reset();
            this.updateStars(document.querySelectorAll('.rating-stars i'), -1);
        } catch (error) {
            console.error('Review submission error:', error);
            this.showNotification('حدث خطأ أثناء إرسال المراجعة', 'error');
        }
    }

    initializeReviewFilters() {
        const filterButtons = document.querySelectorAll('.review-filter');
        filterButtons.forEach(button => {
            button.addEventListener('click', () => {
                filterButtons.forEach(btn => btn.classList.remove('active'));
                button.classList.add('active');
                this.filterReviews(button.dataset.rating);
            });
        });

        // تهيئة الترتيب
        document.getElementById('review-sort')?.addEventListener('change', (e) => {
            this.sortReviews(e.target.value);
        });
    }

    async loadReviews() {
        try {
            const productId = this.reviewsContainer?.dataset.productId;
            const response = await fetch(`/api/reviews.php?product_id=${productId}`);
            
            if (!response.ok) throw new Error('فشل تحميل المراجعات');

            const reviews = await response.json();
            this.displayReviews(reviews);
        } catch (error) {
            console.error('Reviews loading error:', error);
            this.showNotification('حدث خطأ أثناء تحميل المراجعات', 'error');
        }
    }

    displayReviews(reviews) {
        if (!this.reviewsContainer) return;

        if (reviews.length === 0) {
            this.reviewsContainer.innerHTML = '<p class="no-reviews">لا توجد مراجعات بعد</p>';
            return;
        }

        this.reviewsContainer.innerHTML = reviews.map(review => `
            <div class="review-card" data-rating="${review.rating}">
                <div class="review-header">
                    <div class="reviewer-info">
                        <img src="${review.userAvatar}" alt="${review.userName}" class="reviewer-avatar">
                        <div>
                            <h4>${review.userName}</h4>
                            <div class="review-rating">
                                ${this.generateStars(review.rating)}
                            </div>
                            <span class="review-date">${review.date}</span>
                        </div>
                    </div>
                    <div class="review-verification">
                        ${review.verified ? '<span class="verified-badge"><i class="fas fa-check-circle"></i> شراء موثق</span>' : ''}
                    </div>
                </div>
                <div class="review-content">
                    <p>${review.content}</p>
                    ${review.images ? this.generateImageGallery(review.images) : ''}
                </div>
                <div class="review-actions">
                    <button class="helpful-btn" onclick="reviewSystem.markHelpful('${review.id}')">
                        <i class="far fa-thumbs-up"></i>
                        <span class="helpful-count">${review.helpfulCount}</span>
                    </button>
                    <button class="report-btn" onclick="reviewSystem.reportReview('${review.id}')">
                        <i class="far fa-flag"></i>
                    </button>
                </div>
            </div>
        `).join('');
    }

    generateStars(rating) {
        return Array(5).fill().map((_, index) => `
            <i class="fas fa-star ${index < rating ? 'filled' : ''}"></i>
        `).join('');
    }

    generateImageGallery(images) {
        return `
            <div class="review-images">
                ${images.map(image => `
                    <img src="${image}" alt="صورة المراجعة" onclick="reviewSystem.showImageModal('${image}')">
                `).join('')}
            </div>
        `;
    }

    filterReviews(rating) {
        const reviews = document.querySelectorAll('.review-card');
        
        reviews.forEach(review => {
            if (rating === 'all' || review.dataset.rating === rating) {
                review.style.display = 'block';
            } else {
                review.style.display = 'none';
            }
        });
    }

    sortReviews(criteria) {
        const reviews = Array.from(document.querySelectorAll('.review-card'));
        const container = this.reviewsContainer;
        
        if (!container) return;

        reviews.sort((a, b) => {
            switch (criteria) {
                case 'newest':
                    return new Date(b.querySelector('.review-date').textContent) - 
                           new Date(a.querySelector('.review-date').textContent);
                case 'highest':
                    return b.dataset.rating - a.dataset.rating;
                case 'lowest':
                    return a.dataset.rating - b.dataset.rating;
                case 'helpful':
                    return parseInt(b.querySelector('.helpful-count').textContent) - 
                           parseInt(a.querySelector('.helpful-count').textContent);
                default:
                    return 0;
            }
        });

        reviews.forEach(review => container.appendChild(review));
    }

    async markHelpful(reviewId) {
        try {
            const response = await fetch('/api/helpful-review.php', {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json'
                },
                body: JSON.stringify({ reviewId })
            });

            if (!response.ok) throw new Error('فشل تسجيل المساعدة');

            const data = await response.json();
            document.querySelector(`[data-review-id="${reviewId}"] .helpful-count`).textContent = data.helpfulCount;
            this.showNotification('شكراً لتقييمك');
        } catch (error) {
            console.error('Helpful marking error:', error);
        }
    }

    reportReview(reviewId) {
        const reason = prompt('يرجى ذكر سبب الإبلاغ عن هذه المراجعة:');
        if (!reason) return;

        fetch('/api/report-review.php', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ reviewId, reason })
        })
        .then(response => {
            if (response.ok) {
                this.showNotification('شكراً لإبلاغك. سنراجع المحتوى.');
            }
        })
        .catch(error => {
            console.error('Review report error:', error);
            this.showNotification('حدث خطأ أثناء الإبلاغ', 'error');
        });
    }

    showImageModal(imageSrc) {
        const modal = document.createElement('div');
        modal.className = 'image-modal';
        modal.innerHTML = `
            <div class="modal-content">
                <img src="${imageSrc}" alt="صورة المراجعة">
                <button class="close-modal">&times;</button>
            </div>
        `;

        document.body.appendChild(modal);
        modal.querySelector('.close-modal').addEventListener('click', () => modal.remove());
        modal.addEventListener('click', (e) => {
            if (e.target === modal) modal.remove();
        });
    }

    showNotification(message, type = 'success') {
        const notification = document.createElement('div');
        notification.className = `review-notification ${type}`;
        notification.textContent = message;
        
        document.body.appendChild(notification);
        
        setTimeout(() => {
            notification.classList.add('show');
        }, 100);

        setTimeout(() => {
            notification.classList.remove('show');
            setTimeout(() => notification.remove(), 300);
        }, 2000);
    }
}

// تهيئة نظام المراجعات
const reviewSystem = new ReviewSystem();