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

public class LevelGeneration : MonoBehaviour{

	[SerializeField] GameObject levelPrefab;
	[SerializeField] bool spawnGrid = true;

	[Space]
	[SerializeField] Material black;
	[SerializeField] Material white;

	// Start is called before the first frame update
	void Start(){
		if (GameManager.Instance.autoStart)
			StartGeneration();
	}

	public void StartGeneration(){
		if(spawnGrid)
			StartCoroutine(SpawnGrid());
	}

	IEnumerator SpawnGrid(){
		/*for (int i = 0; i < MyVars.gridWidth; i++){
			for (int j = 0; j < MyVars.gridHeight; j++){
				MeshRenderer mesh = Instantiate(levelPrefab, new Vector3(i, -1.5f, j), Quaternion.identity).GetComponentInChildren<MeshRenderer>();
				mesh.material = (i + j) % 2 == 0 ? black : white;
				yield return new WaitForSecondsRealtime(0.015625f);
			}
		}*/

		List<Vector3> positions = new List<Vector3>();
		for (int i = 0; i < MyVars.gridWidth; i++){
			for (int j = 0; j < MyVars.gridHeight; j++){
				positions.Add(new Vector3(i, -1.5f, j));
			}
		}
		for (int i = 0; i < MyVars.gridWidth * MyVars.gridHeight; i += 3){
			if (i < MyVars.gridWidth * MyVars.gridHeight){
				Vector3 pos = positions[Random.Range(0, positions.Count)];
				MeshRenderer mesh = Instantiate(levelPrefab, pos, Quaternion.identity).GetComponentInChildren<MeshRenderer>();
				mesh.material = (pos.x + pos.z) % 2 == 0 ? black : white;
				positions.Remove(pos);
			}
			if (i + 1 < MyVars.gridWidth * MyVars.gridHeight){
				Vector3 pos = positions[Random.Range(0, positions.Count)];
				MeshRenderer mesh = Instantiate(levelPrefab, pos, Quaternion.identity).GetComponentInChildren<MeshRenderer>();
				mesh.material = (pos.x + pos.z) % 2 == 0 ? black : white;
				positions.Remove(pos);
			}
			if (i + 2 < MyVars.gridWidth * MyVars.gridHeight){
				Vector3 pos = positions[Random.Range(0, positions.Count)];
				MeshRenderer mesh = Instantiate(levelPrefab, pos, Quaternion.identity).GetComponentInChildren<MeshRenderer>();
				mesh.material = (pos.x + pos.z) % 2 == 0 ? black : white;
				positions.Remove(pos);
			}
			yield return new WaitForSecondsRealtime(0.01f);
		}
	}
}