using Sirenix.OdinInspector;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;

namespace Ether
{
    public class AStarTest : SerializedMonoBehaviour
    {
        public GameObject gridList;
        public GameObject gridItemTemp;

        public Sprite normalGrid;
        public Sprite startGrid;
        public Sprite obstacleGrid;
        public Sprite targetGrid;
        public Sprite pathGrid;

        public int width = 14;
        public int height = 9;

        public ButtonEx startBtn;
        public ButtonEx targetBtn;
        public ButtonEx obstacleBtn;
        public ButtonEx buildBtn;
        public ButtonEx resetBtn;

        private ItemData start;
        private ItemData target;

        private AStar astar;

        List<Vector2Int> obstacleList = new List<Vector2Int>();

        ClickType curClickType = ClickType.obstacle;

        private void Start()
        {
            gridItemTemp.SetActive(false);

            GenerateAstarGrid();

            startBtn.OnClick.AddListener(() =>
            {
                curClickType = ClickType.start;
            });

            targetBtn.OnClick.AddListener(() =>
            {
                curClickType = ClickType.target;
            });

            obstacleBtn.OnClick.AddListener(() =>
            {
                curClickType = ClickType.obstacle;
            });

            buildBtn.OnClick.AddListener(() =>
            {
                if (astar == null)
                {
                    astar = new AStar(width, height, obstacleList);
                }
                else
                {
                    astar.Reset(width, height, obstacleList);
                }

                foreach (var itemData in itemList)
                {
                    if (itemData.isPathPos)
                    {
                        itemData.img.sprite = normalGrid;
                    }
                }

                Stack<Vector2Int> stepList = new Stack<Vector2Int>();

                astar.BuildPath(start.pos, target.pos, stepList);

                if (stepList.Count > 0)
                {
                    foreach (var step in stepList)
                    {
                        foreach (var itemData in itemList)
                        {
                            if (itemData.pos == step)
                            {
                                if (itemData.pos != start.pos && itemData.pos != target.pos)
                                {
                                    itemData.isPathPos = true;
                                    itemData.img.sprite = pathGrid;
                                }
                            }
                        }
                    }
                }

            });

            resetBtn.OnClick.AddListener(() =>
            {
                GenerateAstarGrid();
            });

        }

        enum ClickType
        {
            start,
            target,
            obstacle,
        }

        class ItemData
        {
            public GameObject item;
            public Image img;
            public Vector2Int pos;
            public bool isPathPos;
        }

        List<ItemData> itemList = new List<ItemData>();

        private void GenerateAstarGrid()
        {
            foreach (var itemData in itemList)
            {
                itemData.item.SetActive(false);
            }
            gridList.SetSize(gridItemTemp.GetSize() * new Vector2(width, height));

            int index = 0;
            for (int i = 0; i < height; i++)
            {
                for (int k = 0; k < width; k++)
                {
                    ItemData itemData;
                    if (index < itemList.Count)
                    {
                        itemData = itemList[index];
                        itemData.pos = new Vector2Int(k, i);
                        itemData.isPathPos = false;
                    }
                    else
                    {
                        GameObject item = Instantiate(gridItemTemp, gridList.transform);
                        item.name = index.ToString();
                        itemData = new ItemData()
                        {
                            item = item,
                            img = item.GetComponent<Image>(),
                            pos = new Vector2Int(k, i)
                        };
                        itemList.Add(itemData);
                    }

                    itemData.item.SetActive(true);

                    itemData.img.sprite = normalGrid;
                    ButtonEx btn = itemData.item.GetComponent<ButtonEx>();
                    btn.OnClick.RemoveAllListeners();
                    btn.OnClick.AddListener(() =>
                    {
                        Debug.Log("点击了pos:" + itemData.pos);
                        switch (curClickType)
                        {
                            case ClickType.start:
                                if (start != null)
                                {
                                    start.img.sprite = normalGrid;
                                }

                                start = itemData;
                                start.img.sprite = startGrid;
                                break;
                            case ClickType.target:
                                if (target != null)
                                {
                                    target.img.sprite = normalGrid;
                                }

                                target = itemData;
                                target.img.sprite = targetGrid;
                                break;
                            case ClickType.obstacle:
                                if (obstacleList.Contains(itemData.pos))
                                {
                                    obstacleList.Remove(itemData.pos);
                                    itemData.img.sprite = normalGrid;
                                }
                                else
                                {
                                    obstacleList.Add(itemData.pos);
                                    itemData.img.sprite = obstacleGrid;
                                }
                                break;
                            default:
                                break;
                        }
                    });

                    index++;
                }
            }


        }

        //[Button("开始寻路显示")]
        //public void StartAStar()
        //{
        //    Stack<Vector2Int> stepList = new Stack<Vector2Int>();

        //    astar.BuildPath(start, target, stepList);

        //    if (stepList.Count > 0)
        //    {
        //        foreach (var step in stepList)
        //        {

        //            displayTileMap.SetTile((Vector3Int)(step), displayTile);
        //        }
        //    }

        //}

        //private void OnDrawGizmos()
        //{
        //    Gizmos.color = Color.red;
        //    for (int i = 0; i <= width; i++)
        //    {
        //        Gizmos.DrawLine(new Vector3(0, i, 0), new Vector3(height, i, 0));
        //    }

        //    for (int i = 0; i <= height; i++)
        //    {
        //        Gizmos.DrawLine(new Vector3(i, 0, 0), new Vector3(i, width, 0));
        //    }
        //}
    }
}