// ===== TYPEWRITER EFFECT =====
function initTypewriter() {
  const el = document.querySelector('.typewriter');
  if (!el) return;
  
  const text = el.getAttribute('data-text');
  let i = 0;
  
  el.textContent = '';
  el.style.opacity = '1';
  
  function type() {
    if (i < text.length) {
      el.textContent += text.charAt(i);
      i++;
      setTimeout(type, 80);
    }
  }
  
  setTimeout(type, 500);
}

// ===== SCROLL PROGRESS BAR =====
function initScrollProgress() {
  const progressBar = document.querySelector('.scroll-progress');
  if (!progressBar) return;
  
  function updateProgress() {
    const docHeight = document.documentElement.scrollHeight - window.innerHeight;
    const scrolled = window.scrollY;
    const progress = (scrolled / docHeight) * 100;
    
    progressBar.style.setProperty('--scroll-progress', `${progress}%`);
    progressBar.setAttribute('aria-valuenow', Math.round(progress));
  }
  
  window.addEventListener('scroll', updateProgress, { passive: true });
  updateProgress();
}

// ===== ANIMATED SKILLS BARS =====
function initSkillBars() {
  const skillItems = document.querySelectorAll('.skill-item');
  if (!skillItems.length) return;
  
  const observer = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
      if (entry.isIntersecting) {
        entry.target.classList.add('animate');
        observer.unobserve(entry.target);
      }
    });
  }, { threshold: 0.3 });
  
  skillItems.forEach(item => observer.observe(item));
}

// ===== PARTICLE BACKGROUND =====
function initParticles() {
  const canvas = document.getElementById('particles');
  if (!canvas) return;
  
  const ctx = canvas.getContext('2d');
  let particles = [];
  let animationId;
  
  function resize() {
    canvas.width = window.innerWidth;
    canvas.height = window.innerHeight;
  }
  
  class Particle {
    constructor() {
      this.x = Math.random() * canvas.width;
      this.y = Math.random() * canvas.height;
      this.vx = (Math.random() - 0.5) * 0.3;
      this.vy = (Math.random() - 0.5) * 0.3;
      this.radius = Math.random() * 1.5 + 0.5;
      this.opacity = Math.random() * 0.3 + 0.1;
    }
    
    update() {
      this.x += this.vx;
      this.y += this.vy;
      
      if (this.x < 0 || this.x > canvas.width) this.vx *= -1;
      if (this.y < 0 || this.y > canvas.height) this.vy *= -1;
    }
    
    draw() {
      ctx.beginPath();
      ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2);
      ctx.fillStyle = `rgba(111, 78, 55, ${this.opacity})`;
      ctx.fill();
    }
  }
  
  function init() {
    resize();
    particles = [];
    const particleCount = Math.floor((canvas.width * canvas.height) / 15000);
    for (let i = 0; i < particleCount; i++) {
      particles.push(new Particle());
    }
  }
  
  function animate() {
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    
    particles.forEach(particle => {
      particle.update();
      particle.draw();
    });
    
    animationId = requestAnimationFrame(animate);
  }
  
  window.addEventListener('resize', () => {
    cancelAnimationFrame(animationId);
    init();
    animate();
  });
  
  init();
  animate();
}

// ===== INTERACTIVE TESTIMONIALS =====
function initTestimonials() {
  const testimonialCards = document.querySelectorAll('.testimonial-card');
  
  testimonialCards.forEach(card => {
    const toggle = card.querySelector('.testimonial-toggle');
    const excerpt = card.querySelector('.testimonial-excerpt');
    const full = card.querySelector('.testimonial-full');
    
    if (!toggle || !excerpt || !full) return;
    
    toggle.addEventListener('click', () => {
      const isExpanded = card.classList.contains('expanded');
      
      card.classList.toggle('expanded');
      toggle.textContent = isExpanded ? 'Read More' : 'Read Less';
      toggle.setAttribute('aria-expanded', !isExpanded);
      
      if (!isExpanded) {
        excerpt.style.display = 'none';
        full.style.display = 'block';
      } else {
        excerpt.style.display = 'block';
        full.style.display = 'none';
      }
    });
  });
}

// ===== INITIALIZE ALL =====
document.addEventListener('DOMContentLoaded', () => {
  initTypewriter();
  initScrollProgress();
  initSkillBars();
  initParticles();
  initTestimonials();
});