using System.Collections.Generic;
using Framework;
using Gameplay.Character;
using Gameplay.Level;
using Gameplay.Unit;
using Gameplay.Unit.Data;
using UnityEngine;
namespace Gameplay.Fight.Capture
{
    /// <summary>
    /// 用于管理战场内的所有占领点
    /// 仅在战场内使用
    /// </summary>
    public class CaptureManager
    {

        public List<CaptureInst> captureInsts = new List<CaptureInst>();

        private bool _needUpdate;

        public static CaptureManager instance { get; private set; }

        public static void CreateInstance()
        {
            instance = new CaptureManager();
        }

        private CaptureManager()
        {

        }

        public void Init()
        {
            _needUpdate = true;
            _RegisterEvents();
            _InitCaptureAreas();
        }

        private void _InitCaptureAreas()
        {
            var levelData = LevelManager.Instance.CurrentLevel.GetLevelData();
            var captureProgress = levelData.CapturePoints;
            
            foreach (var captureInfo in captureProgress)
            {
                _AddCaptureInst(captureInfo.CapturePoint, captureInfo.CaptureProgress);
            }
        }

        private void _AddCaptureInst(int cellIndex,
            int captureValue)
        {
            var newInst = new CaptureInst(cellIndex, captureValue);
            captureInsts.Add(newInst);
        }

        private void _RegisterEvents()
        {
            EventManager.Instance.Register<GameUnit>(EventManager.EventName.INFIGHT_UNIT_CELLINDEX_CHANGE, _OnAnyCellIndexChange);
        }

        private void _UnRegisterEvents()
        {
            EventManager.Instance.Unregister<GameUnit>(EventManager.EventName.INFIGHT_UNIT_CELLINDEX_CHANGE, _OnAnyCellIndexChange);
        }

        private void _OnAnyCellIndexChange(GameUnit unit)
        {
            _needUpdate = true;
        }

        private List<GameUnit> _cacheSelectUnits = new List<GameUnit>(10);
        private List<GameUnit> _FilterUnits()
        {
            var allUnits = GameUnitManager.instance.infightUnits.unitList;
            var selectUnits = _cacheSelectUnits;
            selectUnits.Clear();
            for (int i = 0; i < allUnits.Count; i++)
            {
                var checkUnit = allUnits[i];
                if (!checkUnit.commonData.canControl)
                {
                    continue;
                }
                if (checkUnit.gameunitType is not (EGameUnitType.Character or EGameUnitType.Vehicle))
                {
                    continue;
                }
                if (checkUnit.commonData.troopId != ETroopsId.Self)
                {
                    continue;
                }
                if (checkUnit.statusData.isOnVehicle)
                {
                    continue;
                }
                if (checkUnit.statusData.isDead)
                {
                    continue;
                }
                selectUnits.Add(checkUnit);
            }
            return selectUnits;
        }

        public void LogicUpdate(float dt)
        {

            if (_needUpdate)
            {
                var checkUnits = _FilterUnits();
                for (int i = 0; i < captureInsts.Count; i++)
                {
                    var captureInst = captureInsts[i];
                    captureInst.UpdateInAreaUnits(checkUnits);
                }
                _needUpdate = false;
            }

            for (int i = 0; i < captureInsts.Count; i++)
            {
                var captureInst = captureInsts[i];
                captureInst.LogicUpdate(dt);
                // if (captureInst.isCaptured)
                // {
                //     captureInst.Dispose();
                //     captureInsts.RemoveAt(i);
                //     i--;
                // }
            }
        }

        public void Dispose()
        {
            _UnRegisterEvents();
            for (int i = 0; i < captureInsts.Count; i++)
            {
                var captureInst = captureInsts[i];
                captureInst.Dispose();
            }
            captureInsts.Clear();
            instance = null;
        }

    }
}