'use strict';

// === PARTICLE EFFECTS ===

function spawnParticles(x, y, color, count) {
  if (!gameState.particles) gameState.particles = [];
  if (gameState.particles.length > MAX_PARTICLES) {
    gameState.particles.splice(0, gameState.particles.length - MAX_PARTICLES + count);
  }

  for (let i = 0; i < count; i++) {
    const angle = Math.random() * Math.PI * 2;
    const speed = 1 + Math.random() * 3;
    gameState.particles.push({
      x: x,
      y: y,
      vx: Math.cos(angle) * speed,
      vy: Math.sin(angle) * speed - 1,
      gravity: 0.05,
      color: color,
      size: 1 + Math.random() * 2,
      life: 300 + Math.random() * 400,
      maxLife: 700,
      maxAlpha: 0.8 + Math.random() * 0.2,
      alpha: 1,
    });
  }
}

function spawnHitParticles(x, y) {
  spawnParticles(x, y, '#FF0000', 4);
}

function spawnDefeatParticles(x, y) {
  spawnParticles(x, y, '#FFD700', 12);
  spawnParticles(x, y, '#FFFFFF', 6);
}

function spawnExplosionParticles(x, y) {
  spawnParticles(x, y, '#FF4500', 15);
  spawnParticles(x, y, '#FFD700', 8);
  spawnParticles(x, y, '#FFFFFF', 4);
}

function renderParticles() {
  if (!gameState.particles) return;
  for (const p of gameState.particles) {
    ctx.save();
    ctx.globalAlpha = p.alpha;
    ctx.fillStyle = p.color;
    ctx.beginPath();
    ctx.arc(p.x, p.y, p.size, 0, Math.PI * 2);
    ctx.fill();
    ctx.restore();
  }
}

// Draw projectiles
function renderProjectiles() {
  if (!gameState.projectiles) return;
  for (const p of gameState.projectiles) {
    ctx.fillStyle = p.color || '#FFFF00';
    ctx.beginPath();
    ctx.arc(p.x * TILE + TILE / 2, p.y * TILE + TILE / 2, 4, 0, Math.PI * 2);
    ctx.fill();

    // Trail
    ctx.fillStyle = (p.color || '#FFFF00') + '40';
    ctx.beginPath();
    ctx.arc(p.x * TILE + TILE / 2 - p.dir.x * 6, p.y * TILE + TILE / 2 - p.dir.y * 6, 3, 0, Math.PI * 2);
    ctx.fill();
  }
}

if (typeof module !== 'undefined' && module.exports) {
  module.exports = { spawnParticles, spawnHitParticles, spawnDefeatParticles, spawnExplosionParticles, renderParticles, renderProjectiles };
}