using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;

public class WorldHandler : MonoBehaviour
{
    public static WorldHandler Instance { get; protected set; }
    public Sprite floorSprite;

    public World world{get; protected set;}

    private void Start()
    {
        if(Instance != null)
        {
            Debug.LogError("There should not be two world controllers");
        }
        Instance = this;
        //Create the world
        world = new World();
        //Create a GameObject for each tile
        for (int x = 0; x < world.Width; x++)
        {
            for (int y = 0; y < world.Height; y++)
            {
                Tile tile_data = world.GetTileAt(x, y);
                GameObject tile_go = new GameObject();
                tile_go.name = "Tile_" + x + "_" + y;
                tile_go.transform.position = new Vector3(tile_data.X, tile_data.Y, 0);
                tile_go.transform.SetParent(this.transform, true);
                //Add sprite renderer but without sprite
                tile_go.AddComponent<SpriteRenderer>();

                tile_data.RegisterTileTypeChangedCallback((tile) => { OnTileTypeChanged(tile, tile_go); });
            }
        }
        world.RandomizeTiles();
    }


    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");
        }
    }
}