using System;
using System.Collections;
using System.Collections.Generic;
using AibisDream.Framework;
using AibisDream.Kit;
using UnityEngine;
using Random = UnityEngine.Random;

namespace AibisDream.FixSystem
{
    public class WhackMoleHandler
    {
        private static readonly WhackMoleSystem WhackMoleSystem = FixSystemCenter.SystemDic.Get<WhackMoleSystem>();

        private readonly WhackMoleData _data;

        #region 功能参数

        private int _batchIdx;
        private readonly Dictionary<string, MoleModule> _moleModules;
        private readonly List<WhackMoleBatchHandler> _batchHandlers;

        private WhackMoleRes _res;
        public event Action<WhackMoleRes> OnGameEnd;

        #endregion

        public WhackMoleHandler(WhackMoleData data)
        {
            _data = data;
            _batchIdx = 0;
            _moleModules = WhackMoleSystem.MoleModules;
            // 生成batch序列并链接
            _batchHandlers = CreateBatchHandler(data);
            // 统计一些基本数据
            CalcBaseData();
        }

        private void CalcBaseData()
        {
            _res.totalMoleBatch = _data.totalBatchNum;
            for (int i = 0; i < _data.totalBatchNum; i++)
            {
                _res.totalMoleNum += _data.GetBatch(i).moleNum;
            }
        }

        public void Start()
        {
            foreach (var mole in _moleModules.Values)
            {
                mole.isInMoleGame = true;
            }
            WhackMoleSystem.StartAllFlicker();
            ActionKit.Coroutine(_batchHandlers[_batchIdx].StartBatch).StartGlobal();
        }

        private List<WhackMoleBatchHandler> CreateBatchHandler(WhackMoleData data)
        {
            List<WhackMoleBatchHandler> res = new();
            for (int i = 0; i < data.totalBatchNum; i++)
            {
                var curHandler = new WhackMoleBatchHandler(_moleModules.Values, data, i);
                curHandler.OnBatchEnd += OnBatchEnd;
                res.Add(curHandler);
            }

            return res;
        }

        private void OnBatchEnd(int hitMoleNum)
        {
            _batchIdx++;
            _res.hitMoleNum += hitMoleNum;
            _res.passBatchNum++;
            if (_batchIdx >= _data.totalBatchNum)
            {
                WhackMoleSystem.StopAllFlicker();
                OnGameEnd?.Invoke(_res);
                return;
            }
            // 继续下一个批次，如果有中间状态就在这里处理
            ActionKit.Sequence().Delay(_data.batchGap).Coroutine(_batchHandlers[_batchIdx].StartBatch).StartGlobal();
        }
    }

    public class WhackMoleBatchHandler
    {
        private readonly WhackMoleData _globalData;

        private readonly ISelector<MoleModule> _moleSelector;
        private readonly List<float> _lightGaps = new();
        private readonly List<MoleModule> _lightingMoles = new();

        private bool _isBatchEnd;
        private int _hitMoleNum;

        public event Action<int> OnBatchEnd;

        public WhackMoleBatchHandler(IEnumerable<MoleModule> molesModules, WhackMoleData data, int index)
        {
            _globalData = data;
            var batchData = data.GetBatch(index);
            // 创建选择器
            _moleSelector = new LimitedSelector<MoleModule>(molesModules);
            // 设置亮起时间间隔
            for (var i = 0; i < batchData.moleNum; i++)
            {
                var gap = Random.Range(batchData.durationRange.x, batchData.durationRange.y);
                _lightGaps.Add(gap);
            }

            _lightGaps.Sort();
        }

        public IEnumerator StartBatch()
        {
            // 利用协程记时
            float batchTime = 0f;
            while (!_isBatchEnd)
            {
                OnUpdate(batchTime);
                batchTime += Time.deltaTime;
                yield return null;
            }

            OnBatchEnd?.Invoke(_hitMoleNum);
            OnBatchEnd = null;
        }

        private void OnUpdate(float batchTime)
        {
            // 点亮一些模块，其他的继续闪烁
            while (_lightGaps.Count > 0 && _lightGaps[0] <= batchTime)
            {
                var lightOnMole = _moleSelector.Select();
                lightOnMole.LightOn(_globalData.moleExistTime);
                lightOnMole.OnLightMoleEnd += OnLightMoleEnd;
                // 最后同步其他容器
                _lightGaps.RemoveAt(0);
                _lightingMoles.Add(lightOnMole);
            }
        }

        private void OnLightMoleEnd(MoleModule mole, bool isPlugin)
        {
            // 从亮起列表中移除
            _lightingMoles.Remove(mole);
            if (isPlugin) _hitMoleNum++;
            // 当所有模块都熄灭的时候，游戏结束
            if (_lightingMoles.Count <= 0 && _lightGaps.Count <= 0)
            {
                _isBatchEnd = true;
            }
        }
    }

    public struct WhackMoleRes
    {
        public int totalMoleBatch;
        public int failBatchNum;
        public int passBatchNum;
        public int totalMoleNum;
        public int hitMoleNum;
    }
}