/**
 * PPE SAFETY CHALLENGE - DYNAMIC 2D WORKER AVATAR SYSTEM
 * Uses the step-by-step transparent character images from ppe_character_steps_transparent_png!
 * Dynamically switches character states as safety gear is equipped.
 */

class WorkerAvatar {
  constructor(containerId) {
    this.container = document.getElementById(containerId);
    this.equippedItems = new Set();
    this.render();
  }

  setEquipped(itemIds) {
    this.equippedItems = new Set(itemIds);
    this.updateLayers();
  }

  equip(itemId) {
    this.equippedItems.add(itemId);
    this.updateLayers();
  }

  unequip(itemId) {
    this.equippedItems.delete(itemId);
    this.updateLayers();
  }

  has(itemId) {
    return this.equippedItems.has(itemId);
  }

  getAvatarCenterCoordinates() {
    if (!this.container) return { x: 170, y: 220, eyeX: 170, eyeY: 110, handX: 230, handY: 260 };
    const rect = this.container.getBoundingClientRect();
    const parentRect = this.container.parentElement.getBoundingClientRect();
    const relX = rect.left - parentRect.left + (rect.width * 0.5);
    const relY = rect.top - parentRect.top + (rect.height * 0.5);
    return {
      x: relX,
      y: relY,
      eyeX: relX,
      eyeY: relY - 130,
      handX: relX + 55,
      handY: relY + 30
    };
  }

  getStepImagePath() {
    const hasHelmet = this.equippedItems.has('safety_helmet_grind') || this.equippedItems.has('safety_helmet_chem');
    const hasGoggles = this.equippedItems.has('chem_splash_goggles') || this.equippedItems.has('safety_goggles_grind');
    const hasFaceShield = this.equippedItems.has('face_shield_grind') || this.equippedItems.has('face_shield_chem');
    const hasHearing = this.equippedItems.has('hearing_protection_grind') || this.equippedItems.has('hearing_protection_chem');
    const hasLeatherGloves = this.equippedItems.has('leather_grinding_gloves');
    const hasWorkGloves = this.equippedItems.has('work_gloves_grind') || this.equippedItems.has('standard_work_gloves');
    const hasChemGloves = this.equippedItems.has('chem_resistant_gloves');
    const hasVest = this.equippedItems.has('reflective_vest_grind');
    const hasApron = this.equippedItems.has('chem_resistant_apron');
    const hasCottonCoat = this.equippedItems.has('cotton_coat_chem');
    const hasBoots = this.equippedItems.has('steel_toe_boots_grind') || this.equippedItems.has('chem_safety_shoes');
    const hasMask = this.equippedItems.has('dust_mask_grind');

    // 10. Full PPE with Mask
    if (hasMask) {
      return 'images/steps/10_full_ppe_with_mask.png';
    }

    // 9. Full Grinding Set with Boots
    if (hasHelmet && (hasGoggles || hasFaceShield) && hasHearing && (hasLeatherGloves || hasChemGloves) && (hasVest || hasApron || hasBoots)) {
      return 'images/steps/09_helmet_goggles_hearing_leather_gloves_vest_boots.png';
    }

    // 8. With Vest / Body Wear
    if (hasHelmet && (hasGoggles || hasFaceShield) && hasHearing && (hasLeatherGloves || hasChemGloves) && (hasVest || hasApron || hasCottonCoat)) {
      return 'images/steps/08_helmet_goggles_hearing_leather_gloves_vest.png';
    }

    // 7. With Leather / Chem Gloves
    if (hasHelmet && (hasGoggles || hasFaceShield) && hasHearing && (hasLeatherGloves || hasChemGloves)) {
      return 'images/steps/07_helmet_goggles_hearing_leather_gloves.png';
    }

    // 6. With Work Gloves
    if (hasHelmet && (hasGoggles || hasFaceShield) && hasHearing && hasWorkGloves) {
      return 'images/steps/06_helmet_goggles_hearing_work_gloves.png';
    }

    // 5. With Earmuffs / Hearing Protection
    if (hasHelmet && (hasGoggles || hasFaceShield) && hasHearing) {
      return 'images/steps/05_helmet_goggles_hearing.png';
    }

    // 4. With Face Shield
    if (hasFaceShield || (hasHelmet && hasFaceShield)) {
      return 'images/steps/04_helmet_goggles_face_shield.png';
    }

    // 3. With Goggles & Helmet
    if (hasHelmet && hasGoggles) {
      return 'images/steps/03_helmet_goggles.png';
    }

    // 2. Helmet Only
    if (hasHelmet) {
      return 'images/steps/02_helmet.png';
    }

    // Individual items
    if (hasFaceShield) return 'images/steps/04_helmet_goggles_face_shield.png';
    if (hasGoggles) return 'images/steps/03_helmet_goggles.png';
    if (hasHearing) return 'images/steps/05_helmet_goggles_hearing.png';
    if (hasLeatherGloves) return 'images/steps/07_helmet_goggles_hearing_leather_gloves.png';
    if (hasWorkGloves) return 'images/steps/06_helmet_goggles_hearing_work_gloves.png';

    // 1. Base Worker (No PPE)
    return 'images/steps/01_no_ppe.png';
  }

  render() {
    if (!this.container) return;

    this.container.innerHTML = `
      <div class="avatar-step-container" id="avatar-step-container">
        <!-- Floor Contact Shadow -->
        <div class="avatar-floor-shadow"></div>
        
        <!-- Dynamic Character Step Image -->
        <img src="images/steps/01_no_ppe.png" alt="Worker Character" class="avatar-step-img" id="avatar-step-img" />
      </div>
    `;

    this.updateLayers();
  }

  updateLayers() {
    if (!this.container) return;

    const imgEl = document.getElementById('avatar-step-img');
    if (imgEl) {
      const targetSrc = this.getStepImagePath();
      if (imgEl.getAttribute('src') !== targetSrc) {
        imgEl.src = targetSrc;
      }
    }
  }
}