using System;
using UnityEngine;

[ExecuteInEditMode]
public class GridHandler : MonoBehaviour
{
	[Tooltip("How large (in meters) one grid block side is")]
	public float gridSize = 10f;

	[Tooltip("The player's transform to track")]
	public Transform playerTransform;

	private Vector3Int lastPlayerGrid = new Vector3Int(-99999, -99999, -99999);

	public event Action<Vector3Int> onPlayerGridChange;

	private void Update()
	{
		if (playerTransform == null)
		{
			Debug.LogWarning("Grid Handler Has No Player Transform!");
			return;
		}
		Vector3 position = playerTransform.position;
		Vector3Int vector3Int = new Vector3Int(Mathf.FloorToInt(position.x / gridSize), Mathf.FloorToInt(position.y / gridSize), Mathf.FloorToInt(position.z / gridSize));
		if (vector3Int != lastPlayerGrid)
		{
			if (this.onPlayerGridChange != null)
			{
				this.onPlayerGridChange(vector3Int);
			}
			lastPlayerGrid = vector3Int;
		}
	}

	public Vector3 GetGridCenter(Vector3Int grid)
	{
		float num = gridSize * 0.5f;
		return new Vector3((float)grid.x * gridSize + num, (float)grid.y * gridSize + num, (float)grid.z * gridSize + num);
	}

	private void OnDrawGizmos()
	{
		for (int i = -1; i <= 1; i++)
		{
			for (int j = -1; j <= 1; j++)
			{
				for (int k = -1; k <= 1; k++)
				{
					bool flag = i == 0 && j == 0 && k == 0;
					Vector3 gridCenter = GetGridCenter(lastPlayerGrid + new Vector3Int(i, j, k));
					Gizmos.color = (flag ? Color.green : Color.red);
					Gizmos.DrawWireCube(gridCenter, Vector3.one * (gridSize * (flag ? 0.95f : 1f)));
				}
			}
		}
	}
}