// Main Image Magnifier Class
class ImageMagnifier {
    constructor(containerId, previewId, options = {}) {
        this.container = document.getElementById(containerId);
        this.preview = document.getElementById(previewId);
        this.img = this.container.querySelector('img');
        this.lens = document.getElementById('lens');
        
        this.zoom = options.zoom || 2;
        this.lensSize = options.lensSize || 150;
        
        this.init();
    }

    init() {
        if (this.img.complete) {
            this.setupMagnifier();
        } else {
            this.img.addEventListener('load', () => this.setupMagnifier());
        }
    }

    setupMagnifier() {
        // Update preview background
        this.updatePreviewBackground();

        // Mouse events
        this.container.addEventListener('mouseenter', () => this.showMagnifier());
        this.container.addEventListener('mouseleave', () => this.hideMagnifier());
        this.container.addEventListener('mousemove', (e) => this.moveMagnifier(e));

        // Touch events for mobile
        this.container.addEventListener('touchstart', (e) => {
            e.preventDefault();
            this.showMagnifier();
            this.moveMagnifier(e.touches[0]);
        });
        this.container.addEventListener('touchmove', (e) => {
            e.preventDefault();
            this.moveMagnifier(e.touches[0]);
        });
        this.container.addEventListener('touchend', () => this.hideMagnifier());
    }

    updatePreviewBackground() {
        this.preview.style.backgroundImage = `url('${this.img.src}')`;
        this.preview.style.backgroundSize = `${this.img.width * this.zoom}px ${this.img.height * this.zoom}px`;
    }

    showMagnifier() {
        this.lens.style.opacity = '1';
        this.lens.classList.add('active');
        this.preview.classList.add('active');
        
        // Clear the placeholder content
        const placeholder = this.preview.querySelector('.absolute');
        if (placeholder) placeholder.style.display = 'none';
    }

    hideMagnifier() {
        this.lens.style.opacity = '0';
        this.lens.classList.remove('active');
        this.preview.classList.remove('active');
    }

    moveMagnifier(e) {
        const rect = this.img.getBoundingClientRect();
        const x = e.clientX - rect.left;
        const y = e.clientY - rect.top;

        let lensX = x - (this.lensSize / 2);
        let lensY = y - (this.lensSize / 2);

        // Boundary checks
        lensX = Math.max(0, Math.min(lensX, this.img.width - this.lensSize));
        lensY = Math.max(0, Math.min(lensY, this.img.height - this.lensSize));

        // Position lens
        this.lens.style.left = `${lensX}px`;
        this.lens.style.top = `${lensY}px`;
        this.lens.style.width = `${this.lensSize}px`;
        this.lens.style.height = `${this.lensSize}px`;

        // Calculate background position for preview
        const bgX = (lensX / this.img.width) * 100;
        const bgY = (lensY / this.img.height) * 100;
        
        this.preview.style.backgroundPosition = `${bgX}% ${bgY}%`;
    }

    updateZoom(newZoom) {
        this.zoom = newZoom;
        this.updatePreviewBackground();
    }

    updateLensSize(newSize) {
        this.lensSize = newSize;
    }

    changeImage(newSrc) {
        this.img.src = newSrc;
        this.img.onload = () => {
            this.updatePreviewBackground();
        };
    }
}

// Inline Magnifier
class InlineMagnifier {
    constructor() {
        this.container = document.getElementById('inline-magnifier');
        this.img = this.container.querySelector('img');
        this.lens = document.getElementById('inline-lens');
        this.zoom = 2;
        
        this.init();
    }

    init() {
        this.lens.style.backgroundImage = `url('${this.img.src}')`;
        this.lens.style.backgroundSize = `${this.img.width * this.zoom}px ${this.img.height * this.zoom}px`;

        this.container.addEventListener('mouseenter', () => this.lens.style.opacity = '1');
        this.container.addEventListener('mouseleave', () => this.lens.style.opacity = '0');
        this.container.addEventListener('mousemove', (e) => this.moveLens(e));
    }

    moveLens(e) {
        const rect = this.img.getBoundingClientRect();
        const x = e.clientX - rect.left;
        const y = e.clientY - rect.top;

        const lensWidth = 200;
        const lensHeight = 200;
        
        let lensX = x - (lensWidth / 2);
        let lensY = y - (lensHeight / 2);

        lensX = Math.max(0, Math.min(lensX, this.img.width - lensWidth));
        lensY = Math.max(0, Math.min(lensY, this.img.height - lensHeight));

        this.lens.style.left = `${lensX}px`;
        this.lens.style.top = `${lensY}px`;

        const bgX = (lensX / this.img.width) * 100;
        const bgY = (lensY / this.img.height) * 100;
        
        this.lens.style.backgroundPosition = `${bgX}% ${bgY}%`;
    }
}

// Corner Magnifier
class CornerMagnifier {
    constructor() {
        this.container = document.getElementById('corner-magnifier');
        this.img = this.container.querySelector('img');
        this.zoom = document.getElementById('corner-zoom');
        this.content = document.getElementById('corner-zoom-content');
        this.zoomLevel = 3;
        
        this.init();
    }

    init() {
        this.content.style.backgroundImage = `url('${this.img.src}')`;
        this.content.style.backgroundSize = `${this.img.width * this.zoomLevel}px ${this.img.height * this.zoomLevel}px`;

        this.container.addEventListener('mouseenter', () => this.zoom.style.opacity = '1');
        this.container.addEventListener('mouseleave', () => this.zoom.style.opacity = '0');
        this.container.addEventListener('mousemove', (e) => this.updateZoom(e));
    }

    updateZoom(e) {
        const rect = this.img.getBoundingClientRect();
        const x = e.clientX - rect.left;
        const y = e.clientY - rect.top;

        const bgX = (x / this.img.width) * 100;
        const bgY = (y / this.img.height) * 100;
        
        this.content.style.backgroundPosition = `${bgX}% ${bgY}%`;
    }
}

// Glass Magnifier
class GlassMagnifier {
    constructor() {
        this.container = document.getElementById('glass-magnifier');
        this.img = this.container.querySelector('img');
        this.lens = document.getElementById('glass-lens');
        this.zoom = 2.5;
        
        this.init();
    }

    init() {
        this.lens.style.backgroundImage = `url('${this.img.src}')`;
        this.lens.style.backgroundSize = `${this.img.width * this.zoom}px ${this.img.height * this.zoom}px`;

        this.container.addEventListener('mouseenter', () => this.lens.style.opacity = '1');
        this.container.addEventListener('mouseleave', () => this.lens.style.opacity = '0');
        this.container.addEventListener('mousemove', (e) => this.moveLens(e));
    }

    moveLens(e) {
        const rect = this.img.getBoundingClientRect();
        const x = e.clientX - rect.left;
        const y = e.clientY - rect.top;

        const lensSize = 120;
        let lensX = x - (lensSize / 2);
        let lensY = y - (lensSize / 2);

        lensX = Math.max(0, Math.min(lensX, this.img.width - lensSize));
        lensY = Math.max(0, Math.min(lensY, this.img.height - lensSize));

        this.lens.style.left = `${lensX}px`;
        this.lens.style.top = `${lensY}px`;

        const bgX = (lensX / this.img.width) * 100;
        const bgY = (lensY / this.img.height) * 100;
        
        this.lens.style.backgroundPosition = `${bgX}% ${bgY}%`;
    }
}

// Initialize all magnifiers when DOM is loaded
document.addEventListener('DOMContentLoaded', () => {
    // Main magnifier
    const mainMagnifier = new ImageMagnifier('magnifier-container', 'zoom-preview');

    // Zoom controls
    const zoomSlider = document.getElementById('zoom-slider');
    const zoomValue = document.getElementById('zoom-value');
    const lensSizeSlider = document.getElementById('lens-size');
    const lensSizeValue = document.getElementById('lens-size-value');

    zoomSlider.addEventListener('input', (e) => {
        const value = e.target.value;
        zoomValue.textContent = `${value}x`;
        mainMagnifier.updateZoom(parseFloat(value));
    });

    lensSizeSlider.addEventListener('input', (e) => {
        const value = e.target.value;
        lensSizeValue.textContent = `${value}px`;
        mainMagnifier.updateLensSize(parseInt(value));
    });

    // Thumbnail switching
    const thumbnails = document.querySelectorAll('.thumbnail-card');
    thumbnails.forEach(thumb => {
        thumb.addEventListener('click', () => {
            // Remove active class from all thumbnails
            thumbnails.forEach(t => {
                t.classList.remove('active');
                t.classList.remove('border-purple-500');
                t.classList.add('border-gray-200');
            });
            
            // Add active class to clicked thumbnail
            thumb.classList.add('active');
            thumb.classList.remove('border-gray-200');
            thumb.classList.add('border-purple-500');
            
            // Change main image
            const imageSrc = thumb.dataset.image;
            mainMagnifier.changeImage(imageSrc);
        });
    });

    // Initialize alternative magnifiers
    new InlineMagnifier();
    new CornerMagnifier();
    new GlassMagnifier();
});