// Creative Studio Animation for Nexus
class CreativeParticleAnimation {
    constructor(canvas) {
        this.canvas = canvas;
        this.ctx = canvas.getContext('2d');
        this.particles = [];
        this.flowField = [];
        this.mouse = { x: 0, y: 0, radius: 200 };
        this.time = 0;
        
        this.init();
        this.animate();
        this.setupEventListeners();
    }

    init() {
        this.resizeCanvas();
        this.createFlowField();
        
        // Create creative particles with artistic properties
        const particleCount = Math.min(80, Math.floor(window.innerWidth / 15));
        for (let i = 0; i < particleCount; i++) {
            this.particles.push({
                x: Math.random() * this.canvas.width,
                y: Math.random() * this.canvas.height,
                vx: (Math.random() - 0.5) * 3,
                vy: (Math.random() - 0.5) * 3,
                radius: Math.random() * 4 + 1,
                hue: Math.random() * 360,
                saturation: 70 + Math.random() * 30,
                lightness: 50 + Math.random() * 30,
                life: Math.random() * 100,
                maxLife: 100 + Math.random() * 50
            });
        }
    }

    createFlowField() {
        const cols = Math.floor(this.canvas.width / 50);
        const rows = Math.floor(this.canvas.height / 50);
        
        for (let x = 0; x < cols; x++) {
            this.flowField[x] = [];
            for (let y = 0; y < rows; y++) {
                const angle = Math.sin(x * 0.01 + this.time * 0.001) * Math.cos(y * 0.01 + this.time * 0.001);
                this.flowField[x][y] = {
                    angle: angle,
                    strength: Math.sin(angle) * 2
                };
            }
        }
    }

    resizeCanvas() {
        this.canvas.width = window.innerWidth;
        this.canvas.height = window.innerHeight;
    }

    setupEventListeners() {
        window.addEventListener('resize', () => this.resizeCanvas());
        
        this.canvas.addEventListener('mousemove', (e) => {
            this.mouse.x = e.clientX;
            this.mouse.y = e.clientY;
        });

        this.canvas.addEventListener('mouseleave', () => {
            this.mouse.x = undefined;
            this.mouse.y = undefined;
        });
    }

    animate() {
        requestAnimationFrame(() => this.animate());
        
        // Create trailing effect
        this.ctx.fillStyle = 'rgba(17, 24, 39, 0.1)';
        this.ctx.fillRect(0, 0, this.canvas.width, this.canvas.height);
        
        this.time += 1;
        this.updateParticles();
        this.drawParticleTrails();
        this.drawConnections();
        this.drawArtisticElements();
    }

    updateParticles() {
        this.particles.forEach((particle, index) => {
            // Flow field influence
            const col = Math.floor(particle.x / 50);
            const row = Math.floor(particle.y / 50);
            
            if (this.flowField[col] && this.flowField[col][row]) {
                const field = this.flowField[col][row];
                particle.vx += Math.cos(field.angle) * field.strength * 0.1;
                particle.vy += Math.sin(field.angle) * field.strength * 0.1;
            }

            // Mouse interaction - attract particles
            if (this.mouse.x && this.mouse.y) {
                const dx = this.mouse.x - particle.x;
                const dy = this.mouse.y - particle.y;
                const distance = Math.sqrt(dx * dx + dy * dy);
                
                if (distance < this.mouse.radius) {
                    const force = (this.mouse.radius - distance) / this.mouse.radius;
                    const angle = Math.atan2(dy, dx);
                    
                    particle.vx += Math.cos(angle) * force * 0.8;
                    particle.vy += Math.sin(angle) * force * 0.8;
                    
                    // Color shift on interaction
                    particle.hue = (particle.hue + force * 20) % 360;
                }
            }

            // Natural movement
            particle.x += particle.vx;
            particle.y += particle.vy;
            particle.vx *= 0.98;
            particle.vy *= 0.98;

            // Boundary bounce with creative wrapping
            if (particle.x < 0 || particle.x > this.canvas.width) particle.vx *= -0.8;
            if (particle.y < 0 || particle.y > this.canvas.height) particle.vy *= -0.8;

            // Keep particles in bounds
            particle.x = Math.max(0, Math.min(this.canvas.width, particle.x));
            particle.y = Math.max(0, Math.min(this.canvas.height, particle.y));

            // Particle life cycle
            particle.life += 1;
            if (particle.life > particle.maxLife) {
                // Respawn with new properties
                particle.x = Math.random() * this.canvas.width;
                particle.y = Math.random() * this.canvas.height;
                particle.life = 0;
                particle.hue = Math.random() * 360;
            }
        });
    }

    drawParticleTrails() {
        this.particles.forEach(particle => {
            // Draw particle trail
            this.ctx.beginPath();
            this.ctx.arc(particle.x, particle.y, particle.radius, 0, Math.PI * 2);
            
            const alpha = (particle.maxLife - particle.life) / particle.maxLife;
            const color = `hsla(${particle.hue}, ${particle.saturation}%, ${particle.lightness}%, ${alpha})`;
            
            this.ctx.fillStyle = color;
            this.ctx.fill();

            // Add glow effect
            this.ctx.shadowColor = color;
            this.ctx.shadowBlur = 10;
            this.ctx.fill();
            this.ctx.shadowBlur = 0;
        });
    }

    drawConnections() {
        for (let i = 0; i < this.particles.length; i++) {
            for (let j = i + 1; j < this.particles.length; j++) {
                const dx = this.particles[i].x - this.particles[j].x;
                const dy = this.particles[i].y - this.particles[j].y;
                const distance = Math.sqrt(dx * dx + dy * dy);

                if (distance < 120) {
                    const opacity = 1 - (distance / 120);
                    const hue = (this.particles[i].hue + this.particles[j].hue) / 2;
                    
                    this.ctx.strokeStyle = `hsla(${hue}, 80%, 60%, ${opacity * 0.3})`;
                    this.ctx.lineWidth = 1;
                    this.ctx.beginPath();
                    this.ctx.moveTo(this.particles[i].x, this.particles[i].y);
                    this.ctx.lineTo(this.particles[j].x, this.particles[j].y);
                    this.ctx.stroke();
                }
            }
        }
    }

    drawArtisticElements() {
        // Draw abstract geometric shapes
        if (this.time % 300 === 0) {
            this.drawGeometricShape();
        }
    }

    drawGeometricShape() {
        const centerX = this.canvas.width / 2;
        const centerY = this.canvas.height / 2;
        const size = 50 + Math.sin(this.time * 0.01) * 30;
        
        this.ctx.save();
        this.ctx.translate(centerX, centerY);
        this.ctx.rotate(this.time * 0.001);
        
        // Draw rotating polygon
        this.ctx.beginPath();
        for (let i = 0; i < 6; i++) {
            const angle = (i / 6) * Math.PI * 2;
            const x = Math.cos(angle) * size;
            const y = Math.sin(angle) * size;
            if (i === 0) this.ctx.moveTo(x, y);
            else this.ctx.lineTo(x, y);
        }
        this.ctx.closePath();
        
        this.ctx.strokeStyle = `hsla(${(this.time * 0.5) % 360}, 70%, 70%, 0.5)`;
        this.ctx.lineWidth = 2;
        this.ctx.stroke();
        
        this.ctx.restore();
    }
}

// Initialize when DOM is loaded
document.addEventListener('DOMContentLoaded', function() {
    const canvas = document.getElementById('networkCanvas');
    if (canvas) {
        new CreativeParticleAnimation(canvas);
    }
    
    // Add interactive gallery effects
    addGalleryInteractions();
});

// Gallery interaction effects
function addGalleryInteractions() {
    const galleryItems = document.querySelectorAll('.grid > div');
    
    galleryItems.forEach((item, index) => {
        item.addEventListener('mouseenter', function() {
            this.style.transform = 'scale(1.05) rotate(2deg)';
            this.style.zIndex = '10';
        });
        
        item.addEventListener('mouseleave', function() {
            this.style.transform = 'scale(1) rotate(0deg)';
            this.style.zIndex = '1';
        });
        
        // Add click effect
        item.addEventListener('click', function() {
            this.classList.add('animate-pulse');
            setTimeout(() => {
                this.classList.remove('animate-pulse');
            }, 1000);
        });
    });
}

// Smooth scrolling for anchor links
document.querySelectorAll('a[href^="#"]').forEach(anchor => {
    anchor.addEventListener('click', function (e) {
        e.preventDefault();
        const target = document.querySelector(this.getAttribute('href'));
        if (target) {
            target.scrollIntoView({
                behavior: 'smooth',
                block: 'start'
            });
        }
    });
});

// Add scroll-based animations
window.addEventListener('scroll', function() {
    const scrolled = window.pageYOffset;
    const parallax = document.querySelector('#networkCanvas');
    
    if (parallax) {
        parallax.style.transform = `translateY(${scrolled * 0.5}px)`;
    }
});