import Phaser from "phaser";
import { GAME_CONFIG } from "../../core/config/GameConfig";
import { TrackDirection } from "./TrackSystem";

export interface MineCartState {
  x: number;
  y: number;
  facing: { dx: number, dy: number };
}

export class MineCartSystem {
  static updateOrientation(sprite: Phaser.GameObjects.Sprite, dx: number, dy: number, _connections: TrackDirection) {
    const { mineCarts } = GAME_CONFIG.rendering;

    // Horizontal movement
    if (dx !== 0 && dy === 0) {
      sprite.setFrame(mineCarts.horizontal);
      sprite.setFlipX(dx < 0);
      sprite.setAngle(0);
    }
    // Vertical movement
    else if (dy !== 0 && dx === 0) {
      sprite.setFrame(mineCarts.vertical);
      sprite.setFlipY(false);
      sprite.setAngle(0);
    }
    // Turning (Corner case)
    else {
      sprite.setFrame(mineCarts.turning);
      // Logic for 56 (turned from right to down by default)
      // We need to rotate/flip to match the actual turn.
      // This is a bit complex without seeing the sprite, but we'll approximate:
      if (dx > 0 && dy > 0) sprite.setAngle(0);       // Right to Down
      if (dx < 0 && dy < 0) sprite.setAngle(180);     // Left to Up
      if (dx > 0 && dy < 0) sprite.setAngle(-90);     // Right to Up
      if (dx < 0 && dy > 0) sprite.setAngle(90);      // Left to Down
    }
  }

  static getNextPosition(current: { x: number, y: number }, dx: number, dy: number, isTrack: (x: number, y: number) => boolean): { x: number, y: number, dx: number, dy: number } | null {
    const nextX = current.x + dx;
    const nextY = current.y + dy;

    if (isTrack(nextX, nextY)) {
      return { x: nextX, y: nextY, dx, dy };
    }

    // Try turning if blocked
    const possibleTurns = [
      { tdx: dy, tdy: -dx }, // Left turn
      { tdx: -dy, tdy: dx }  // Right turn
    ];

    for (const turn of possibleTurns) {
      if (isTrack(current.x + turn.tdx, current.y + turn.tdy)) {
        return { x: current.x + turn.tdx, y: current.y + turn.tdy, dx: turn.tdx, dy: turn.tdy };
      }
    }

    return null;
  }
}