import Phaser from 'phaser';
import { SCALE } from '../config/constants';

/**
 * Utility class for converting between game coordinates (meters) and screen coordinates (pixels)
 */
export class CoordinateUtils {
  /**
   * Convert game coordinates (meters, centered) to screen coordinates (pixels)
   * @param scene Phaser scene
   * @param gameX X position in meters (0 = center)
   * @param gameY Y position in meters (0 = center)
   * @returns Screen coordinates {x, y} in pixels
   */
  static gameToScreen(scene: Phaser.Scene, gameX: number, gameY: number): { x: number; y: number } {
    const centerX = (scene.game.config.width as number) / 2;
    const centerY = (scene.game.config.height as number) / 2;
    return {
      x: centerX + gameX * SCALE,
      y: centerY - gameY * SCALE  // Negative Y because screen coords increase downward
    };
  }

  /**
   * Convert screen coordinates (pixels) to game coordinates (meters, centered)
   * @param scene Phaser scene
   * @param screenX X position in pixels
   * @param screenY Y position in pixels
   * @returns Game coordinates {x, y} in meters
   */
  static screenToGame(scene: Phaser.Scene, screenX: number, screenY: number): { x: number; y: number } {
    const centerX = (scene.game.config.width as number) / 2;
    const centerY = (scene.game.config.height as number) / 2;
    return {
      x: (screenX - centerX) / SCALE,
      y: -(screenY - centerY) / SCALE  // Negative Y to convert screen coords back to game coords
    };
  }

  /**
   * Get the center of the screen in pixels
   * @param scene Phaser scene
   * @returns Center coordinates {x, y} in pixels
   */
  static getScreenCenter(scene: Phaser.Scene): { x: number; y: number } {
    return {
      x: (scene.game.config.width as number) / 2,
      y: (scene.game.config.height as number) / 2
    };
  }
}