using UnityEngine;

public class InventoryItem : MonoBehaviour
{

    [SerializeField, Min(1)]
    private int gridSpacesX = 1;

    [SerializeField, Min(1)]
    private int gridSpacesY = 1;

    [SerializeField]
    private bool[] occupiedCells;

    [SerializeField]
    private Item itemData;

    public Item ItemData => itemData;
    public int gridX => gridSpacesX;
    public int gridY => gridSpacesY;

    public bool[] cells => occupiedCells;

    private void OnValidate()
    {
        int size = gridSpacesX * gridSpacesY;

        if (occupiedCells == null || occupiedCells.Length != size)
        {
            bool[] old = occupiedCells;

            occupiedCells = new bool[size];

            if (old != null)
            {
                for (int i = 0; i < Mathf.Min(old.Length, occupiedCells.Length); i++)
                {
                    occupiedCells[i] = old[i];
                }
            }
        }
    }

    public bool IsOccupied(int x, int y)
    {
        int flippedY = gridSpacesY - 1 - y;
        int index = flippedY * gridSpacesX + x;

        return occupiedCells[index];
    }

    public void SetOccupied(int x, int y, bool value)
    {
        int flippedY = gridSpacesY - 1 - y;
        int index = flippedY * gridSpacesX + x;

        occupiedCells[index] = value;
    }
}