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

/// <summary>
/// Instatiates Tiles at beginning of the game
/// </summary>
public class TileController : MonoBehaviour {
    #region Singleton

    public static TileController instance;

    private void Awake() {
        if (instance != null) {
            Debug.LogWarning("More than one instance of TileController found");
        }

        instance = this;
    }

    #endregion
    
    public GameObject tile;

    public GameObject cameraGameObject;

    public List<List<GameObject>> Tiles;

    // Start is called before the first frame update
    void Start() {
        Tiles = new List<List<GameObject>>();
        Camera camera = cameraGameObject.GetComponent<Camera>();
        Vector3 screen = camera.ViewportToWorldPoint(new Vector3(1, 1, camera.nearClipPlane));
        int x = Convert.ToInt32(Math.Ceiling(screen.x));
        int y = Convert.ToInt32(Math.Ceiling(screen.y));
        for(int xx = -x; xx <= x; xx++) {
            List<GameObject> temp = new List<GameObject>();
            for(int yy = -y; yy <= y; yy++) {
                if(tile != null) {
                    temp.Add(Instantiate(tile, new Vector3(xx, yy, 0), Quaternion.identity));
                }
            }
            Tiles.Add(temp);
        }
    }
}