using UnityEngine;

public class CellManager : MonoBehaviour
{
    public RectTransform cellCanvas;
    public RectTransform cell;

    // 0 == 비어있음, 1 == 차있음, 2 == 잠김
    private const int mapSize = 30;
    private int[] tiles;
    private RectTransform[] tileUIs;

    void Start()
    {
        tiles = new int [mapSize * mapSize];

        // TODO: 데이터 입력
        for (int i = 0; i < mapSize * mapSize; i++)
        {
            tiles[i] = 0;
        }

        cell.SetParent(null);
        cell.gameObject.SetActive(false);

        tileUIs = new RectTransform[mapSize * mapSize];
        for (int i = 0; i < mapSize * mapSize; i++)
        {
            var newCell = Instantiate(cell, cellCanvas);
            newCell.gameObject.SetActive(true);
            tileUIs[i] = newCell.GetComponent<RectTransform>();
        }

        UpdateCells();
    }

    Vector3 CellToWorld(Vector2Int cellPos)
    {
        var worldX = (cellPos.x - cellPos.y) * 0.5f * 1.414f;
        var worldZ = -(cellPos.x + cellPos.y) * 0.5f * 1.414f;
        return new Vector3(worldX, 0f, worldZ);
    }

    Vector2Int WorldToCell(Vector3 worldPos)
    {
        var cellX = Mathf.RoundToInt((worldPos.x - worldPos.z)/ 1.414f);
        var cellY = Mathf.RoundToInt((-worldPos.z - worldPos.x) / 1.414f);
        return new Vector2Int(cellX, cellY);
    }

    int GetCellID(Vector2Int cellPos)
    {
        return cellPos.x + cellPos.y * mapSize;
    }

    Vector3 GetCellWorldPos(int cellPos)
    {
        return CellToWorld(new Vector2Int(cellPos / mapSize, cellPos % mapSize));
    }

    public void UpdateCells()
    {
        for (int i = 0; i < mapSize * mapSize; i++)
        {
            tileUIs[i].anchoredPosition3D = GetCellWorldPos(i);
        }
    }
}