'use strict';

// === HUD RENDERING ===

function renderHUD() {
  // Hearts
  const totalHearts = Math.ceil(gameState.player.maxHp / 2);
  const fullHearts = Math.floor(gameState.player.hp / 2);
  const halfHeart = gameState.player.hp % 2 === 1;

  for (let i = 0; i < totalHearts; i++) {
    const hx = 12 + i * 22;
    const hy = 12;
    drawHeart(ctx, hx, hy, 14, i < fullHearts);
    if (i === fullHearts && halfHeart) {
      ctx.save();
      ctx.beginPath();
      ctx.rect(hx - 7, hy - 7, 14, 14);
      ctx.clip();
      drawHeart(ctx, hx, hy, 14, true);
      ctx.restore();
    }
  }

  // Active weapon icon
  if (gameState.player.activeWeapon) {
    drawWeaponIcon(ctx, gameState.player.activeWeapon, CANVAS_W - 24, 14);
  }

  // Ammo counts
  if (gameState.player.arrows > 0) {
    ctx.fillStyle = '#8B4513';
    ctx.fillRect(CANVAS_W - 50, 10, 2, 12);
    ctx.fillStyle = '#808080';
    ctx.fillRect(CANVAS_W - 52, 10, 6, 3);
    ctx.fillStyle = '#FFFFFF';
    ctx.font = '9px monospace';
    ctx.textAlign = 'right';
    ctx.fillText(gameState.player.arrows, CANVAS_W - 54, 22);
    ctx.textAlign = 'left';
  }

  if (gameState.player.bombs > 0) {
    ctx.fillStyle = '#333';
    ctx.beginPath();
    ctx.arc(CANVAS_W - 38, 14, 3, 0, Math.PI * 2);
    ctx.fill();
    ctx.fillStyle = '#FFFFFF';
    ctx.font = '9px monospace';
    ctx.textAlign = 'right';
    ctx.fillText(gameState.player.bombs, CANVAS_W - 42, 22);
    ctx.textAlign = 'left';
  }

  if (gameState.player.keys > 0) {
    ctx.fillStyle = '#FFD700';
    ctx.beginPath();
    ctx.arc(CANVAS_W - 30, 30, 3, 0, Math.PI * 2);
    ctx.fill();
    ctx.fillStyle = '#FFFFFF';
    ctx.font = '9px monospace';
    ctx.textAlign = 'right';
    ctx.fillText(gameState.player.keys, CANVAS_W - 34, 38);
    ctx.textAlign = 'left';
  }

  // Weapon inventory (bottom right)
  if (gameState.player.weapons.length > 1) {
    let wx = CANVAS_W - 16;
    for (let i = gameState.player.weapons.length - 1; i >= 0; i--) {
      const w = gameState.player.weapons[i];
      const isActive = w === gameState.player.activeWeapon;
      ctx.fillStyle = isActive ? '#FFD700' : '#555';
      ctx.fillRect(wx - 10, CANVAS_H - 20, 12, 16);
      ctx.strokeStyle = isActive ? '#FFD700' : '#333';
      ctx.lineWidth = isActive ? 1.5 : 0.5;
      ctx.strokeRect(wx - 10, CANVAS_H - 20, 12, 16);
      drawWeaponIcon(ctx, w, wx - 4, CANVAS_H - 12);
      wx -= 14;
    }
  }

  // Room name / dungeon info
  const dungeon = DUNGEONS[gameState.currentDungeon];
  if (dungeon) {
    ctx.fillStyle = '#CCCCCC';
    ctx.font = '12px monospace';
    ctx.textAlign = 'center';
    ctx.fillText(`${dungeon.name} - Room ${gameState.currentRoomIdx + 1}/${gameState.dungeonRooms ? gameState.dungeonRooms.length : '?'}`, CANVAS_W / 2, CANVAS_H - 8);
    ctx.textAlign = 'left';
  }

  // Controls hint (fades out)
  if (gameState.messageTimer <= 0 && gameState.currentRoomIdx === 0) {
    ctx.fillStyle = 'rgba(0,0,0,0.5)';
    ctx.fillRect(CANVAS_W / 2 - 100, CANVAS_H - 28, 200, 18);
    ctx.fillStyle = '#888';
    ctx.font = '10px monospace';
    ctx.textAlign = 'center';
    ctx.fillText('Arrows/WASD: Move  Space: Attack  E: Interact  X: Switch', CANVAS_W / 2, CANVAS_H - 15);
    ctx.textAlign = 'left';
  }
}

if (typeof module !== 'undefined' && module.exports) {
  module.exports = { renderHUD };
}