using Cysharp.Threading.Tasks;
using Gameplay.Area;
using Gameplay.Area.Around;
using Gameplay.Area.BoardView;
using Gameplay.Common;
using Gameplay.Level;
using Gameplay.Story.Cmp.Anim;
using Gameplay.SubSystems;
using NLDPB;
using PhxhSDK;
using PhxhSDK.Res;
using System.Collections.Generic;
using UnityEngine;

namespace Gameplay.LegionBattle
{
    public sealed partial class LegionBattle : IUpdatable, ILoadable
    {
        /// <summary>
        /// 最大边数
        /// </summary>
        public const int MAX_SIDE = 6;

        private Transform tsSideRoot;
        /// <summary>
        /// 边界线Prefab数组
        /// </summary>
        private GameObject[] goSides = new GameObject[MAX_SIDE];
        /// <summary>
        /// 格子数据
        /// </summary>
        private Dictionary<Vector2Int, LegionBattleHexesData> dicHexesData;
        /// <summary>
        /// 边界数据
        /// </summary>
        private Dictionary<int, LegionBattleSideData> dicSideData;

        /// <summary>
        /// 要更新的格子
        /// </summary>
        private HashSet<Vector2Int> setUpdateHexes;
        /// <summary>
        /// 要更新边的格子
        /// </summary>
        private HashSet<Vector2Int> setUpdateHexesSide;

        /// <summary>
        /// 军团战地图
        /// </summary>
        public Map Map { get; private set; }

        /// <summary>
        /// 两格之间的距离
        /// </summary>
        public float Distance { get; private set; }

        public async UniTask LoadMap()
        {
            SceneHandle sceneHandle = await GameSceneManager.Instance.LoadSceneAsync(MapCfg.Path);
            MapData mapData = await MapUtils.LoadMapData(MapCfg.MapData); // 加载地图数据
            Map = await MapUtils.LoadMap(mapData); // 加载地图
            AroundHelper.Init(Map);
            Camera camera = sceneHandle.Camera;
            CameraManager.Instance.SwitchMainCamera(camera);
            MapUtils.BindCameraController(camera, Map);
            Map.TerrainGridSystem.showCells = true;
            Map.TerrainGridSystem.cellBorderThickness = 0.04f;
            Vector3 start = Map.TGSCellIndex2WorldPosition(0);
            Vector3 end = Map.TGSCellIndex2WorldPosition(1);
            Distance = (end - start).magnitude;

            if (null == setUpdateHexes)
                setUpdateHexes = new HashSet<Vector2Int>();

            if(null == setUpdateHexesSide)
                setUpdateHexesSide = new HashSet<Vector2Int>();

            if (null == dicHexesData)
                dicHexesData = new Dictionary<Vector2Int, LegionBattleHexesData>();

            if (null == dicSideData)
                dicSideData = new Dictionary<int, LegionBattleSideData>();

            #region 资源加载
            for (int i = 0; i < MAX_SIDE; i++)
            {
                goSides[i] = await AssetManager.Instance.LoadAssetAsync<GameObject>(PathDefine.BoardSide.LEGION_BATTLE_SIDE_PATHS[i]);
            }
            AssetManager.Instance.PostPreload(PathDefine.MoveArea.LEGIONBATTLE_A_AREA_PATH); // 蓝色方地格
            AssetManager.Instance.PostPreload(PathDefine.MoveArea.LEGIONBATTLE_B_AREA_PATH); // 红色方地格
            #endregion

            await AssetManager.Instance.WaitAllPreloads();

            GameObject goSideRoot = new("[Side]");
            tsSideRoot = goSideRoot.transform;

            GameObject goCellRoot = new("[MoveArea]");
            Transform tsCellRoot = goCellRoot.transform;
            GameObject goACell = AssetManager.Instance.GetPreLoadResult<GameObject>(PathDefine.MoveArea.LEGIONBATTLE_A_AREA_PATH);
            GameObject goBCell = AssetManager.Instance.GetPreLoadResult<GameObject>(PathDefine.MoveArea.LEGIONBATTLE_B_AREA_PATH);
            foreach (TGS.Cell cell in Map.TerrainGridSystem.cells)
            {
                Vector3 pos = Map.TGSCellIndex2WorldPosition(cell.index);
                Vector2Int coordinate = Map.TGSCellIndex2BlockPosition(cell.index);
                GameObject goNewACell = Object.Instantiate(goACell, tsCellRoot); // 实例化地板
                goNewACell.transform.position = pos;
                goNewACell.SetActive(false);

                GameObject goNewBCell = Object.Instantiate(goBCell, tsCellRoot); // 实例化地板
                goNewBCell.transform.position = pos;
                goNewBCell.SetActive(false);
                LegionBattleHexesData hexesData = new(cell, coordinate, goNewACell, goNewBCell);
                dicHexesData.Add(coordinate, hexesData);
                foreach (int i in hexesData.ListAroundSideIndex)
                {
                    CreateSideByIndex(i);
                }
            }
        }

        /// <summary>
        /// 获取地板阵营根据索引
        /// </summary>
        /// <param name="index"></param>
        /// <returns></returns>
        public BattlefieldActorCamp GetCellCampByIndex(int index)
        {
            Vector2Int pos = Map.TGSCellIndex2BlockPosition(index);

            if (!dicHexesData.TryGetValue(pos, out LegionBattleHexesData hexesData))
                return BattlefieldActorCamp.BacNone;

            return hexesData.Camp;
        }

        /// <summary>
        /// 更新变化的格子边线
        /// </summary>
        private void UpdateAllSide()
        {
            foreach (Vector2Int pos in setUpdateHexes)
            {
                if (!dicHexesData.TryGetValue(pos, out LegionBattleHexesData hexesData))
                    continue;

                setUpdateHexesSide.Add(pos);
                foreach (Vector2Int aroundPos in hexesData.ListAroundCell)
                {
                    setUpdateHexesSide.Add(aroundPos);
                }
            }

            foreach (Vector2Int pos in setUpdateHexesSide)
            {
                if (!dicHexesData.TryGetValue(pos, out LegionBattleHexesData hexesData))
                    continue;

                hexesData.UpdateSide();
            }

            setUpdateHexes.Clear();
            setUpdateHexesSide.Clear();
        }

        /// <summary>
        /// 设置格子边线是否显示
        /// </summary>
        /// <param name="camp">当前格子阵营</param>
        /// <param name="aroundCell">周围格子</param>
        /// <param name="sideIndex">边线索引</param>
        public void UpdateSideShow(BattlefieldActorCamp camp, Vector2Int aroundCell, int sideIndex)
        {
            if (!dicSideData.TryGetValue(sideIndex, out LegionBattleSideData sideData))
                return;

            if (!dicHexesData.TryGetValue(aroundCell, out LegionBattleHexesData hexesData))
            {
                sideData.IsActive = true;
                return;
            }

            sideData.IsActive = camp != hexesData.Camp;
        }

        /// <summary>
        /// 创建边界线
        /// </summary>
        /// <param name="boardIndex"></param>
        private void CreateSideByIndex(int boardIndex)
        {
            if (dicSideData.ContainsKey(boardIndex))
                return;

            int centerCellIndex = boardIndex / 10;
            Vector3 centerPos = Map.TGSCellIndex2WorldPosition(centerCellIndex);
            int side = boardIndex % 10;

            dicSideData.Add(boardIndex, new LegionBattleSideData(centerPos, CreateBoardSideObj(side, centerPos, boardIndex.ToString())));
        }

        /// <summary>
        /// 创建边的实例
        /// </summary>
        /// <param name="side"></param>
        /// <param name="centerPos"></param>
        /// <returns></returns>
        private GameObject CreateBoardSideObj(int side, Vector3 centerPos, string name)
        {
            GameObject goSide = Object.Instantiate(goSides[side - 1], tsSideRoot);
            goSide.transform.position = centerPos;
            goSide.name = name;

            return goSide;
        }
    }
}