using BigFloatNumerics;
using System;
using System.Collections.Generic;
using UnityEngine;

using static BattleMgr;

public class TrainDg : GameMod
{
    [SerializeField] Transform playerSpawnPos;

    [SerializeField] TrainDgView view;

    BattleMgr battleMgr => BattleMgr.Instance;
    float modElapsedTime;

    IVCharacter player;
    Dictionary<uint, IMonoObjectPool<Character>> normalEnemyPoolMap;

    public new TrainDgData Data => base.Data as TrainDgData;
    public int CurrentWave { get; private set; }
    public int CurEnemyCount { get; private set; }
    public float ModRemainingTime => Mathf.Max(Data.LimitTime - modElapsedTime, 0f);

    protected override void OnInitialize()
    {
        normalEnemyPoolMap = new Dictionary<uint, IMonoObjectPool<Character>>();
    }

    protected override void OnStartMod()
    {
        BattleMgr.Instance.SetBackGround(Data.BackGroundPath);

        //Set enemy pool
        foreach (var creator in Data.NormalEnemyCreators)
        {
            var pool = new DynamicMonoObjectPool<Character>();
            pool.Initialize(() => InstantiateEnemy(pool, creator.property, () => creator.GetHp(Data.Level), () => creator.GetAtk(Data.Level)), DestroyEnemy);
            normalEnemyPoolMap.Add(creator.property.id, pool);
        }

        //Summon player
        player = battleMgr.GetPlayer();

        var buffMgr = BuffMgr.Instance;
        player.ResetDebuff();
        player.SetStatus(
            buffMgr.GetCharAtk(),
            buffMgr.GetCharHp(),
            buffMgr.GetCharCrtDam(),
            buffMgr.GetCharCrtRate(),
            buffMgr.GetCharMov(),
            buffMgr.GetCharSpd(),
            GameProperty.Instance.PlayerCharacterAttackRange);
        player.transform.position = playerSpawnPos.position;

        player.Summon();

        MateMgr.Instance.EndAllSettedMateSkillCool();
        MateMgr.Instance.SetAcitveMateToFirst();
        MateMgr.Instance.ActiveMate?.Spawn(player, player.LookDirection);

        battleMgr.SetPetsSummonState(true);
        battleMgr.SetGudiansSummonState(true);

        battleMgr.ShowTalkBox(TalkType.Summon);

        CurrentWave = 0;
        CurEnemyCount = 0;
        modElapsedTime = 0f;

        IVCameraController.SMoveCamera(player.transform.position);

        //Set UI
        GameUIMgr.OnOffStageInfo(false);

        view?.SetDungeon(this);
        view?.Show();
    }

    private Character InstantiateEnemy(DynamicMonoObjectPool<Character> targetPool, CharacterProperty prop, Func<BigFloat> getHpFunc, Func<BigFloat> getAtkFunc)
    {
        var enemyData = new CharacterData(prop);

        if (enemyData.TryGetStat(StatID.Hp, out var hpStat))
            hpStat.DefaultValue = getHpFunc();
        if (enemyData.TryGetStat(StatID.Attack, out var atkStat))
            atkStat.DefaultValue = getAtkFunc();

        var enemy = Instantiate(enemyData.Prefab);

        enemy.SetData(enemyData);
        enemy.AddTags(EntityTag.Enemy);
        enemy.SetTargetTags(LayerMask.GetMask(GameProperty.Instance.CharacterLayerName), EntityTag.Player);

        enemy.OnDamaged += (obj, damage) =>
        {
            if (obj.CurrentHp <= 0)
            {
                BattleMgr.Instance.UnregistBattleEntities(obj);
                CurEnemyCount--;
            }
        };
        enemy.OnDisposed += (obj) => targetPool.Return(obj);

        return enemy;
    }

    private void DestroyEnemy(Character target)
    {
        if (target == null || target.gameObject == null) return;

        battleMgr.UnregistBattleEntities(target);
        CoroutineHandler.Instance.DelayCall(1f, () => Destroy(target.gameObject));
    }

    protected override void OnUpdate()
    {
        if (BattleMgr.Instance.BattlePause) return;

        modElapsedTime += Time.deltaTime;

        if (modElapsedTime >= Data.LimitTime)
        {
            battleMgr.ShowTalkBox(TalkType.Die);
            FireOnDone(Result.Timeout);
        }
        else
        {
            if (player.IsDead)
            {
                battleMgr.ShowTalkBox(TalkType.Die);
                FireOnDone(Result.Dead);
            }
            else if (CurEnemyCount <= 0)
            {
                if (CurrentWave < Data.WaveCount)
                {
                    CurrentWave++;
                    SpawnWave();
                }
                else
                {
                    battleMgr.ShowTalkBox(TalkType.Attack);

                    Data.SetLevel(Data.Level + 1);
                    Data.TryUnlockPlayerAwaken((result) =>
                    {
                        if (!result) return;
                        BattleMgr.Instance.ShowTrainDgSuccWindow();
                        BuffMgr.Instance.ChangeAwakenDungeonStat((int)Data.Level);
                    });

                    FireOnDone(Result.Success);
                }
            }
        }
    }

    private void SpawnWave()
    {
        var areaSize = BattleMgr.Instance.GetBgSize();
        CurEnemyCount = 0;

        foreach (var creator in Data.NormalEnemyCreators)
        {
            var rndPositions = TargetFinder.GetRandom(areaSize.bounds, (int)creator.countPerWave);
            var pool = normalEnemyPoolMap[creator.property.id];

            for (int i = 0; i < creator.countPerWave; i++)
            {
                var enemy = pool.Get();

                enemy.Spawn(rndPositions[i]);
                enemy.ChangeLookDirection(player.transform);
                BattleMgr.Instance.RegistBattleEntities(enemy);

                CurEnemyCount++;
            }
        }
    }

    protected override void OnEndMod()
    {
        view?.Hide();

        GameUIMgr.OnOffStageInfo(true);

        foreach (var pool in normalEnemyPoolMap.Values)
        {
            pool.Dispose();
        }
        normalEnemyPoolMap.Clear();
    }

    public void QuitDungeon()
    {
        battleMgr.ShowTalkBox(TalkType.Die);
        FireOnDone(Result.Quit);
    }
}