using UnityEngine.UI;
using UnityEngine;

namespace Fruitomation.UI
{
    [RequireComponent(typeof(Image))]
    public class GridViewController : MonoBehaviour
    {
        [SerializeField] private Texture2D SourceTexture;
        [SerializeField] private int Cols;
        [SerializeField] private int Rows;

        private Image Image;

        private void Awake()
        {
            Texture2D tiled = TileTexture(SourceTexture, Cols, Rows);
            Sprite sprite = Sprite.Create
            (
                tiled,
                new Rect(0, 0, tiled.width, tiled.height),
                new Vector2(0.5f, 0.5f)
            );

            Image = GetComponent<Image>();
            Image.color = Color.white;
            Image.sprite = sprite;
        }

        private static Texture2D TileTexture(Texture2D source, int cols, int rows)
        {
            int srcW = source.width;
            int srcH = source.height;
            Texture2D result = new(srcW * cols, srcH * rows);

            Color[] srcPixels = source.GetPixels();

            for (int row = 0; row < rows; row++)
            for (int col = 0; col < cols; col++)
            {
                result.SetPixels(col * srcW, row * srcH, srcW, srcH, srcPixels);
            }

            result.Apply();
            return result;
        }

        private void Update() =>
            Image.enabled = GameStateController.Is(GameState.Building);
    }
}