// Optical Illusions Data
const illusions = [
    {
        title: "Spinning Vortex",
        description: "A mesmerizing spiral that appears to spin infinitely",
        type: "spiral",
        colors: ["#ff00ff", "#00ffff", "#ffff00"]
    },
    {
        title: "Floating Grid",
        description: "Grid patterns that seem to float and transform",
        type: "grid",
        colors: ["#ff0066", "#6600ff", "#00ff99"]
    },
    {
        title: "Morphing Circles",
        description: "Circles that continuously change shape and size",
        type: "circles",
        colors: ["#ff5500", "#55ff00", "#0055ff"]
    },
    {
        title: "Pulsating Waves",
        description: "Waves that create a breathing, living pattern",
        type: "waves",
        colors: ["#ff00aa", "#aa00ff", "#00aaff"]
    },
    {
        title: "Kaleidoscope",
        description: "Symmetrical patterns that shift and transform",
        type: "kaleidoscope",
        colors: ["#ffff00", "#ff00ff", "#00ffff"]
    },
    {
        title: "Infinity Tunnel",
        description: "A tunnel that appears to extend into infinity",
        type: "tunnel",
        colors: ["#ff0000", "#00ff00", "#0000ff"]
    }
];

// Canvas Variables
let canvas, ctx;
let isAnimating = false;
let animationId;

// Initialize when DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
    initializeIllusions();
    initializeCanvas();
    startBackgroundAnimations();
});

// Initialize Optical Illusions Gallery
function initializeIllusions() {
    const grid = document.getElementById('illusions-grid');
    
    illusions.forEach((illusion, index) => {
        const card = document.createElement('div');
        card.className = 'illusion-card p-6';
        card.innerHTML = `
            <div class="w-full h-48 mb-4 rounded-lg ${illusion.type} ${index % 2 === 0 ? 'floating' : 'breathing'}" 
                 style="background: conic-gradient(from 0deg, ${illusion.colors.join(', ')});"></div>
            <h3 class="text-xl font-bold mb-2 psychedelic-text">${illusion.title}</h3>
            <p class="text-white/70">${illusion.description}</p>
        `;
        grid.appendChild(card);
    });
}

// Initialize Interactive Canvas
function initializeCanvas() {
    canvas = document.getElementById('psychedelic-canvas');
    ctx = canvas.getContext('2d');
    
    // Set canvas size
    canvas.width = canvas.offsetWidth;
    canvas.height = canvas.offsetHeight;
    
    // Add drawing functionality
    let isDrawing = false;
    let lastX = 0;
    let lastY = 0;
    let hue = 0;
    
    canvas.addEventListener('mousedown', startDrawing);
    canvas.addEventListener('mousemove', draw);
    canvas.addEventListener('mouseup', stopDrawing);
    canvas.addEventListener('mouseout', stopDrawing);
    
    function startDrawing(e) {
        isDrawing = true;
        [lastX, lastY] = [e.offsetX, e.offsetY];
    }
    
    function draw(e) {
        if (!isDrawing) return;
        
        ctx.strokeStyle = `hsl(${hue}, 100%, 50%)`;
        ctx.lineWidth = 3;
        ctx.lineJoin = 'round';
        ctx.lineCap = 'round';
        
        ctx.beginPath();
        ctx.moveTo(lastX, lastY);
        ctx.lineTo(e.offsetX, e.offsetY);
        ctx.stroke();
        
        [lastX, lastY] = [e.offsetX, e.offsetY];
        hue = (hue + 1) % 360;
    }
    
    function stopDrawing() {
        isDrawing = false;
    }
}

// Canvas Functions
function clearCanvas() {
    ctx.fillStyle = 'rgba(0, 0, 0, 0.1)';
    ctx.fillRect(0, 0, canvas.width, canvas.height);
}

function toggleAnimation() {
    isAnimating = !isAnimating;
    
    if (isAnimating) {
        animateCanvas();
    } else {
        cancelAnimationFrame(animationId);
    }
}

function animateCanvas() {
    if (!isAnimating) return;
    
    // Create psychedelic animation
    ctx.fillStyle = 'rgba(0, 0, 0, 0.05)';
    ctx.fillRect(0, 0, canvas.width, canvas.height);
    
    const time = Date.now() * 0.001;
    
    for (let i = 0; i < 5; i++) {
        const x = Math.sin(time * 0.5 + i) * canvas.width * 0.3 + canvas.width * 0.5;
        const y = Math.cos(time * 0.7 + i) * canvas.height * 0.3 + canvas.height * 0.5;
        const radius = Math.sin(time + i) * 50 + 70;
        
        ctx.beginPath();
        ctx.arc(x, y, radius, 0, Math.PI * 2);
        ctx.strokeStyle = `hsl(${(time * 50 + i * 72) % 360}, 100%, 50%)`;
        ctx.lineWidth = 3;
        ctx.stroke();
    }
    
    animationId = requestAnimationFrame(animateCanvas);
}

// Background Animations
function startBackgroundAnimations() {
    // Add floating particles
    createFloatingParticles();
    
    // Add occasional color shifts
    setInterval(() => {
        document.documentElement.style.setProperty('--hue-rotate', `${Math.random() * 360}deg`);
    }, 3000);
}

function createFloatingParticles() {
    const particlesContainer = document.createElement('div');
    particlesContainer.className = 'fixed inset-0 pointer-events-none';
    document.body.appendChild(particlesContainer);
    
    for (let i = 0; i < 20; i++) {
        const particle = document.createElement('div');
        particle.className = 'absolute w-2 h-2 rounded-full';
        particle.style.background = `hsl(${Math.random() * 360}, 100%, 50%)`;
        particle.style.left = `${Math.random() * 100}%`;
        particle.style.top = `${Math.random() * 100}%`;
        particle.style.animation = `floating ${6 + Math.random() * 4}s ease-in-out infinite`;
        particle.style.animationDelay = `${Math.random() * 5}s`;
        particlesContainer.appendChild(particle);
    }
}

// Handle window resize
window.addEventListener('resize', function() {
    if (canvas) {
        canvas.width = canvas.offsetWidth;
        canvas.height = canvas.offsetHeight;
    }
});