using UnityEngine;
using System.Collections;

public class WorldController : MonoBehaviour {


	public Sprite floorSprite;

	// The world and tile data
	World world;

	// Use this for initialization
	void Start () {
		// Create a world with Empty tiles
		world = new World();

		// Create a GameObject for each of our tiles, so they have a visual component
		for (int x = 0; x < world.Width; x++) {
			for (int y = 0; y < world.Height; y++) {
				// Get the tile data
				Tile tile_data = world.GetTileAt(x, y);

				// Create new GameObject, add to scene
				GameObject tile_go = new GameObject();
				tile_go.name = "Tile_" + x + "_" + y;
				tile_go.transform.position = new Vector3( tile_data.X, tile_data.Y, 0);

				// Add a sprite renderer to tile - do not set sprite yet, that is done is worldgen
				tile_go.AddComponent<SpriteRenderer>();

				// Use a lambda to "wrap" our callback function
				tile_data.RegisterTileTypeChangedCallback( (tile) => { OnTileTypeChanged(tile, tile_go); } );
			}
		}

		// Shake things up, for testing.
		world.RandomizeTiles();
	}

	// Update is called once per frame
	void Update () {

	}

	// This function should be called automatically whenever a tile's type gets changed.
	void OnTileTypeChanged(Tile tile_data, GameObject tile_go) {

		if(tile_data.Type == Tile.TileType.Floor) {
			tile_go.GetComponent<SpriteRenderer>().sprite = floorSprite;
		}
		else if( tile_data.Type == Tile.TileType.Empty ) {
			tile_go.GetComponent<SpriteRenderer>().sprite = null;
		}
		else {
			Debug.LogError("OnTileTypeChanged - Unrecognized tile type.");
		}


	}

}