import Base from '../objects/Base.js';
import Bullet from '../objects/Bullet.js';
import Enemy from '../objects/Enemy.js';
import LevelManager from '../managers/LevelManager.js';
import XPManager from '../managers/XPManager.js';
import SpawnManager from '../managers/SpawnManager.js';
import UIManager from '../managers/UIManager.js';
import { ASSET_PATH } from '../config.js';

export default class GameScene extends Phaser.Scene {
  constructor() { super('Game'); }

  preload() {
    // Spritesheets
    this.load.spritesheet('base', `${ASSET_PATH}sprites/base_spritesheet.png`, { frameWidth:128, frameHeight:128 });
    this.load.spritesheet('enemy', `${ASSET_PATH}sprites/enemy_spritesheet.png`, { frameWidth:96, frameHeight:96 });
    this.load.image('bullet', `${ASSET_PATH}sprites/bullet.png`);

    // Audio
    this.load.audio('shoot', `${ASSET_PATH}audio/shoot.mp3`);
    this.load.audio('explosion', `${ASSET_PATH}audio/explosion.wav`);

    // JSON data
    this.load.json('levels', `${ASSET_PATH}data/levels.json`);
    this.load.json('units', `${ASSET_PATH}data/units.json`);
  }

  create() {
    // Managers
    this.xpManager = new XPManager(this);
    this.levelManager = new LevelManager(this, this.cache.json.get('levels'));
    this.spawnManager = new SpawnManager(this, this.cache.json.get('units'));
    this.uiManager = new UIManager(this, this.xpManager);

    // Groups
    this.enemies = this.physics.add.group();
    this.bullets = this.physics.add.group();

    // Base (center‑bottom)
    const baseX = this.scale.width / 2;
    const baseY = this.scale.height - 80;
    this.base = new Base(this, baseX, baseY, 'base');
    this.add.existing(this.base);

    // Collisions
    this.physics.add.overlap(this.bullets, this.enemies, this.handleBulletHit, null, this);
    this.physics.add.overlap(this.enemies, this.base, this.handleEnemyReachBase, null, this);

    // Start first level
    this.levelManager.startLevel(1);
    this.spawnManager.startSpawning(this.levelManager.currentConfig.spawnInterval);
  }

  update(time, delta) {
    this.base.update(time, delta);
  }

  handleBulletHit(bullet, enemy) {
    bullet.destroy();
    enemy.takeDamage(bullet.damage);
    if (enemy.isDead()) {
      this.xpManager.addXP(enemy.xpValue);
      enemy.destroy();
    }
  }

  handleEnemyReachBase(enemy, base) {
    base.takeDamage(enemy.collisionDamage || 20);
    enemy.destroy();
    if (base.isDestroyed()) {
      this.scene.start('GameOver');
    }
  }
}