using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class BuildManager : MonoBehaviour
{
    // Start is called before the first frame update
    // private bool isBuilding = false;

    [Tooltip("一个格子的预制体")] public GameObject building_prefab;
    private GameObject building_object;

    // private HashSet<Vector2Int> occupied_positions = new HashSet<Vector2Int>();
    [Tooltip("一个用于存放临时网格的空物体")] public Transform around_grid_parent; // 用于存放所有生成的网格对象

    private List<Vector2Int> around_position = new List<Vector2Int>();

    // 挂载到UI的按钮事件
    public void m_button_down_start_building()
    {
        create_around_position();
    }

    private void create_around_position()
    {
        Vector2Int[] directions =
        {
            new Vector2Int(0, 1), // 上
            new Vector2Int(0, -1), // 下
            new Vector2Int(-1, 0), // 左
            new Vector2Int(1, 0), // 右
            new Vector2Int(-1, 1), // 左上
            new Vector2Int(1, 1), // 右上
            new Vector2Int(-1, -1), // 左下
            new Vector2Int(1, -1), // 右下
        };
        Vector2Int center_position = new Vector2Int(0, 0);
        foreach (var dir in directions)
        {
            Vector2Int new_pos = center_position + dir;
            GameObject grid = Instantiate(building_prefab,
                new Vector3(new_pos.x * 2, new_pos.y * 2, 0),
                Quaternion.identity);
            grid.transform.parent = around_grid_parent;
            around_position.Add(new_pos);
        }
    }

    // public void m_button_down_building()
    // {
    //     // building_object = Instantiate(building_prefab, Vector3.zero, Quaternion.identity);
    //     // isBuilding = true;
    //     this.show_neighbor_grid(new Vector2Int(0, 0));
    // }

    // // 添加初始建筑
    // public void add_building(Vector2Int pos)
    // {
    //     Instantiate(building_prefab, new Vector3(pos.x, pos.y, 0), Quaternion.identity);
    //     occupied_positions.Add(pos);
    // }
    //
    // // 清除旧网格
    // public void ClearGrids()
    // {
    //     foreach (Transform child in around_grid_parent)
    //         Destroy(child.gameObject);
    // }
    //
    // // 点击网格时调用
    // public void place_building(Vector2Int pos)
    // {
    //     if (occupied_positions.Contains(pos)) return;
    //
    //     Instantiate(building_prefab, new Vector3(pos.x, pos.y, 0), Quaternion.identity);
    //     occupied_positions.Add(pos);
    //
    //     ClearGrids();
    //     show_neighbor_grid(pos); // 自动显示新建筑的周围格子
    // }
    //
    //
    // // 生成周围网格
    // private void show_neighbor_grid(Vector2Int center_position)
    // {
    //     Vector2Int[] directions =
    //     {
    //         new Vector2Int(0, 1), // 上
    //         new Vector2Int(0, -1), // 下
    //         new Vector2Int(-1, 0), // 左
    //         new Vector2Int(1, 0), // 右
    //         new Vector2Int(-1, 1), // 左上
    //         new Vector2Int(1, 1), // 右上
    //         new Vector2Int(-1, -1), // 左下
    //         new Vector2Int(1, -1), // 右下
    //     };
    //
    //     foreach (var dir in directions)
    //     {
    //         Vector2Int around_position = center_position + dir;
    //         if (occupied_positions.Contains(around_position)) continue;
    //         GameObject grid = Instantiate(building_prefab,
    //             new Vector3(around_position.x, around_position.y, 0),
    //             Quaternion.identity, around_grid_parent);
    //         bool is_diagonal = Mathf.Abs(dir.x) == 1 && Mathf.Abs(dir.y) == 1;
    //         grid.GetComponent<SpriteRenderer>().color = is_diagonal ? Color.red : Color.green;
    //         // grid.GetComponent<GridCell>().Init(this, new_pos);
    //     }
    // }
    //
    // void Start()
    // {
    // }

    // Update is called once per frame
    void Update()
    {
        // if (isBuilding)
        // {
        //     Vector3 mouse_position = Input.mousePosition;
        //     mouse_position = Camera.main.ScreenToWorldPoint(mouse_position);
        //     mouse_position.z = 0;
        //     building_object.transform.position = mouse_position;
        // }
    }
}