using System.Collections.Generic;
using Gameplay.Level;

namespace Gameplay.Fight.Flag
{
    public class FlagManager
    {
        public static FlagManager instance { get; private set; }

        public static void CreateInstance()
        {
            instance = new FlagManager();
        }
        
        private List<FlagReturnPos> _returnPoints = new List<FlagReturnPos>();
        private List<FlagInst> _flagInsts = new List<FlagInst>();

        public List<FlagInst> FlagInsts => _flagInsts;

        private FlagManager()
        {
            
        }

        public void Init()
        {
            var levelData = LevelManager.Instance.CurrentLevel.GetLevelData();
            var flagStartIndexs = levelData.flagStartPoints;
            for (int i = 0; i < flagStartIndexs.Count; i++)
            {
                AddFlag(flagStartIndexs[i]);
            }
            if (flagStartIndexs.Count <= 0)
            {
                // 没有旗子,不用管旗子归还点
                return;
            }
            
            // 使用随机出生点生成一个returnPos
            var flagReturnRegionId = levelData.flagEndPoints;
            for (int i = 0; i < flagReturnRegionId.Count; i++)
            {
                AddFlagReturnPos(flagReturnRegionId[i]);
            }
        }

        public void AddFlagReturnPos(int cellIndex)
        {
            var newReturnPos = new FlagReturnPos(cellIndex);
            _returnPoints.Add(newReturnPos);
        }

        public void AddFlag(int cellIndex)
        {
            var newFlag = new FlagInst(cellIndex);
            _flagInsts.Add(newFlag);
        }

        public FlagInst PickFlag(int cellIndex)
        {
            for (int i = 0; i < _flagInsts.Count; i++)
            {
                var flagInst = _flagInsts[i];
                if (flagInst.cellIndex == cellIndex)
                {
                    _flagInsts.RemoveAt(i);
                    return flagInst;
                }
            }
            return null;
        }

        public bool CheckArrived(int cellIndex)
        {
            for (int i = 0; i < _returnPoints.Count; i++)
            {
                var returnPos = _returnPoints[i];
                if (returnPos.cellIndex == cellIndex)
                {
                    return true;
                }
            }
            return false;
        }

        public void Dispose()
        {
            for (int i = 0; i < _returnPoints.Count; i++)
            {
                var returnPos = _returnPoints[i];
                returnPos.Dispose();
            }
            _returnPoints.Clear();
            
            for (int i = 0; i < _flagInsts.Count; i++)
            {
                var flagInst = _flagInsts[i];
                flagInst.Dispose();
            }
            _flagInsts.Clear();
        }
    }
}