using System.Collections.Generic;
using UnityEngine;

namespace Fruitomation.Game
{
    public class BuildingManager : MonoBehaviour
    {
        private class BuildingInfo
        {
            public BuildingInfo(BuildingBase b, RectTransform rt)
            {
                Building = b;
                Rect = rt;
            }

            public BuildingBase Building { get; }
            public RectTransform Rect { get; }
        }

        private bool[,] InhabitedCells { get; } = new bool[96, 49];
        private List<BuildingInfo> Buildings { get; } = new();

        public bool AddBuildingAt(Vector2Int position, GameObject prefab, bool updateCellMap = false)
        {
            //
            GameObject go = Instantiate(prefab, transform);
            BuildingInfo info = new
            (
                go.GetComponent<BuildingBase>(),
                go.GetComponent<RectTransform>()
            );

            Vector2Int p0 = position * 40;
            Vector2Int p1 = p0 + new Vector2Int(20, 100);
            
            Vector2Int g0 = position + new Vector2Int(48, 24);
            
            Vector2 off0 = info.Building.SizeOnGrid - Vector2.one;
            Vector2 off1 = off0 * 20;

            info.Rect.sizeDelta = info.Building.SizeOnGrid * 40;
            info.Rect.anchoredPosition = p1 + off1;
            
            Debug.Log(g0);
            
            //
            for (int x = g0.x; x < g0.x + info.Building.SizeOnGrid.x; x++)
            for (int y = g0.y; y < g0.y + info.Building.SizeOnGrid.y; y++)
            {
                if (InhabitedCells[x, y])
                {
                    DestroyImmediate(go);
                    return false;
                }
            }
            
            //
            for (int x = g0.x; x < g0.x + info.Building.SizeOnGrid.x; x++)
            for (int y = g0.y; y < g0.y + info.Building.SizeOnGrid.y; y++)
            {
                InhabitedCells[x, y] = true;
            }

            Buildings.Add(info);
            return true;
        }
    }
}