using System;
using System.Collections.Generic;
using System.Linq;
using Cysharp.Threading.Tasks;
using DG.Tweening;
using UnityEngine;

public class BulletSkillEffect : SkillEffect
{
    // protected SkillConfig skillConfig;
    // protected BattleObject caster;
    // protected List<BattleObject> targets; // 目标列表

    protected List<BulletCurve> bulletCurves = new List<BulletCurve>();

    public BulletSkillEffect(SkillConfig _skillConfig, BattleObject _caster, HB427_tagSCUseSkill _tagUseSkillAttack)
        : base(_skillConfig, _caster, _tagUseSkillAttack)
    {

    }


    public override void OnMiddleFrameStart(int times)
    {
        base.OnMiddleFrameStart(times);
        //  弹射 另外的做法了
        if (skillConfig.effectType == SkillEffectType.Bullet && skillConfig.BulletPath == 4)
        {
            var hurt = tagUseSkillAttack.HurtList[0];
            BattleObject targetObject = caster.battleField.battleObjMgr.GetBattleObject((int)hurt.ObjID);
            if (targetObject == null)
            {
                Debug.LogError("目标为空 target == null ObjId : " + hurt.ObjID);
                return;
            }
            ShotToTarget(targetObject);
        }
        //  普通的做法 区分打向阵营或者打向个体
        else
        {
            //  区分散射跟范围攻击
            if (skillConfig.Scattering == 1)
            {
                //  散射
                ShotEachTargets();
            }
            else
            {
                switch (skillConfig.TagAim)
                {
                    case 0:
                        AllAreaShoting();
                        break;
                    case 1:
                        OneTargetShoting();
                        break;
                    case 2:
                        FrontRowShoting();
                        break;
                    case 3:
                        BackRowShoting();
                        break;
                    case 4:
                        VerticalRowShoting();
                        break;
                    case 5:
                        SelfShoting();
                        break;
                }
            }
        }
    }

    // 0   全部范围：
    private void AllAreaShoting()
    {
        if (skillConfig.TagCount == 0 || skillConfig.TagCount >= 6)
        {
            // 若TagCount目标个数为0或6，根据TagFriendly敌我配置，代表作用于敌方全体或我方全体，此时主目标为敌我站位中的2号位置
            BattleCamp battleCamp = skillConfig.TagFriendly != 0 ? caster.Camp : caster.GetEnemyCamp();
            ShotToIndex(battleCamp, 1);
        }
        else
        {
            // 若TagCount目标个数为1~5个，代表随机作用于敌方或我方x个武将，此时所有被随机到的对象都为主目标（施法位置会用客户端配置）
            ShotEachTargets();
        }   
    }

    // 1    对位：
    private void OneTargetShoting()
    {
        // 默认只选1个，对位规则为A1优先打B1，A2优先打B2，A3优先打B3，对位目标死亡时，优先前排，
        // 比如B2已经死亡，那么A2将优先打B1，前排1、2、3号位置全部死亡之后才开始选择后排4、5、6号位置，
        // 对位只可选1个目标，即主目标

        if (tagUseSkillAttack.HurtList.Length > 1)
        {
            Debug.LogError("服务器 对位攻击目标数量错误，应该只有一个目标 技能id" + skillConfig.SkillID);
        }

        var hurt = tagUseSkillAttack.HurtList[0];
        BattleObject targetObject = caster.battleField.battleObjMgr.GetBattleObject((int)hurt.ObjID);
        if (targetObject == null)
        {
            Debug.LogError("目标为空 target == null ObjId : " + hurt.ObjID);
            return;
        }
        ShotToTarget(targetObject);
    }

    // 2    前排：
    private void FrontRowShoting()
    {
        // 1、2、3号位为前排，默认2号位置为主目标，当1、2、3号位置角色全部死亡，前排将替换成后排，5号位置变更为主目标，
        // 若配置TagAffect细分目标，且人数小于3，则所有被选择目标均为主目标（施法位置会用客户端配置）
        // （即前排默认2号位或5号位规则无效，实际作用多少人就是多少个主目标）

        BattleCamp battleCamp = skillConfig.TagFriendly != 0 ? caster.Camp : caster.GetEnemyCamp();

        if (skillConfig.TagAffect != 0 && skillConfig.TagAffect != 3 && skillConfig.TagCount < 3)
        {
            ShotEachTargets();
        }
        else
        {
            int targetIndex = int.MaxValue;
            int minimumIndex = int.MaxValue;

            foreach (var hurt in tagUseSkillAttack.HurtList)
            {
                BattleObject target = caster.battleField.battleObjMgr.GetBattleObject((int)hurt.ObjID);
                if (target == null)
                {
                    Debug.LogError("特效目标为空 target == null ObjId : " + hurt.ObjID);
                    continue;
                }

                minimumIndex = Mathf.Min(target.teamHero.positionNum, minimumIndex);

                if (target.Camp == battleCamp && target.teamHero.positionNum < 3)
                {
                    targetIndex = 1;
                    break;
                }
            }

            if (targetIndex == int.MaxValue)
            {
                targetIndex = (minimumIndex >= 3) ? 4 : 1;
            }
            else
            {
                targetIndex = 1;
            }

            ShotToIndex(battleCamp, targetIndex);
        }

    }

    private void ShotToIndex(BattleCamp camp, int targetIndex)
    {
        RectTransform targetTransform = caster.battleField.GetTeamNode(camp, targetIndex);
        BattleEffectPlayer effectPlayer = caster.battleField.battleEffectMgr.PlayEffect(caster.ObjID, skillConfig.BulletEffectId, caster.heroRectTrans, caster.Camp);

        RectTransform effectTrans = effectPlayer.transform as RectTransform;

        var bulletCurve = BulletCurveFactory.CreateBulletCurve(caster, skillConfig, effectPlayer, targetTransform, tagUseSkillAttack, (index, hitList) =>
        {
            if (isFinish)
                return;
            // 击中就销毁子弹
            caster.battleField.battleEffectMgr.RemoveEffect(skillConfig.BulletEffectId, effectPlayer);
            // 播放子弹爆炸特效

            BattleCamp battleCamp = skillConfig.TagFriendly != 0 ? caster.Camp : caster.GetEnemyCamp();
            //  首先是目标身上爆炸
            PlayExplosionEffect(skillConfig.ExplosionEffectId, targetTransform, battleCamp);
            PlayExplosionEffect(skillConfig.ExplosionEffect2, targetTransform, battleCamp);

            foreach (var hurt in hitList)
            {
                BattleObject targetObj = caster.battleField.battleObjMgr.GetBattleObject((int)hurt.ObjID);
                if (targetObj == null)
                {
                    Debug.LogError("目标为空 target == null ObjId : " + hurt.ObjID);
                    continue;
                }

                PlayExplosionEffect(skillConfig.ExplosionEffect3, targetObj.heroGo.transform, targetObj.Camp);
            }

            // 表现子弹飞行到目标位置
            onHit?.Invoke(index, hitList);

            isFinish = true;
        });

        bulletCurves.Add(bulletCurve);
    }

    // 3    后排：
    private void BackRowShoting()
    {
        // 4、5、6号位为后排，默认5号位置为主目标，当4、5、6号位置角色全部死亡，后排排将替换成前排，2号位置变更为主目标，
        // 若配置TagAffect细分目标，且人数小于3，则所有被选择目标均为主目标（施法位置会用客户端配置）
        // （即前排默认2号位或5号位规则无效，实际作用多少人就是多少个主目标）

        BattleCamp battleCamp = skillConfig.TagFriendly != 0 ? caster.Camp : caster.GetEnemyCamp();

        if (skillConfig.TagAffect != 0 && skillConfig.TagAffect != 3 && skillConfig.TagCount < 3)
        {
            ShotEachTargets();
        }
        else
        {
            int targetIndex = int.MaxValue;
            int maxinumIndex = int.MinValue;

            foreach (var hurt in tagUseSkillAttack.HurtList)
            {
                BattleObject target = caster.battleField.battleObjMgr.GetBattleObject((int)hurt.ObjID);
                if (target == null)
                {
                    Debug.LogError("特效目标为空 target == null ObjId : " + hurt.ObjID);
                    continue;
                }

                if (target.Camp == battleCamp && target.teamHero.positionNum > 3)
                {
                    targetIndex = 4;
                    break;
                }

                maxinumIndex = Mathf.Max(target.teamHero.positionNum, maxinumIndex);
            }

            if (targetIndex == int.MaxValue)
            {
                targetIndex = (maxinumIndex < 3) ? 1 : 4;
            }
            else
            {
                targetIndex = 4;
            }

            ShotToIndex(battleCamp, targetIndex);
        }
    }

    // 4    纵排：
    private void VerticalRowShoting()
    {
        // 纵排分别为1、4，2、5，3、6，三组纵排，按对位规则选择，默认1号、2号或3号为主目标，前排1、2、3号位置全部死完后，4号、5号或6号为主目标

        ShotEachTargets();

    }

    // 5    自己：
    private void SelfShoting()
    {
        // 默认只选自己，自己为主目标
        ShotToIndex(caster.Camp, caster.teamHero.positionNum);
    }

    protected void ShotToTarget(BattleObject target)
    {
        BattleEffectPlayer effectPlayer = caster.battleField.battleEffectMgr.PlayEffect(caster.ObjID, skillConfig.BulletEffectId, caster.heroRectTrans, caster.Camp);

        var bulletCurve = BulletCurveFactory.CreateBulletCurve(caster, skillConfig, effectPlayer, target.heroRectTrans, tagUseSkillAttack, (index, hitList) =>
        {
            if (isFinish)
                return;
            

            foreach (var hurt in hitList)
            {
                BattleObject targetObj = caster.battleField.battleObjMgr.GetBattleObject((int)hurt.ObjID);
                if (targetObj == null)
                {
                    Debug.LogError("目标为空 target == null ObjId : " + hurt.ObjID);
                    continue;
                }

                PlayExplosionEffect(skillConfig.ExplosionEffectId, targetObj.heroGo.transform, targetObj.Camp);
                PlayExplosionEffect(skillConfig.ExplosionEffect2, targetObj.heroGo.transform, targetObj.Camp);
                PlayExplosionEffect(skillConfig.ExplosionEffect3, targetObj.heroGo.transform, targetObj.Camp);
            }

            // 表现子弹飞行到目标位置
            onHit?.Invoke(index, hitList);
            // 击中就销毁子弹
            caster.battleField.battleEffectMgr.RemoveEffect(skillConfig.BulletEffectId, effectPlayer);
            
            // 播放子弹爆炸特效
            isFinish = true;
        });

        bulletCurves.Add(bulletCurve);
    }

    protected void PlayExplosionEffect(int effectId, Transform parent, BattleCamp camp)
    {
        if (effectId <= 0)
            return;

        var effect = caster.battleField.battleEffectMgr.PlayEffect(0, effectId, parent, camp);
        if (effect != null)
        {
            effect.transform.localRotation = parent.localRotation;
            if (effect.transform.localScale.x < 0f)
            {
                effect.transform.localRotation *= Quaternion.Euler(0, 180, 0);
            }
        }
    }

    private void ShotEachTargets()
    {
        for (int i = 0; i < tagUseSkillAttack.HurtList.Length; i++)
        {
            var hurt = tagUseSkillAttack.HurtList[i];
            BattleObject target = caster.battleField.battleObjMgr.GetBattleObject((int)hurt.ObjID);
            if (target == null)
            {
                Debug.LogError("特效目标为空 target == null ObjId : " + hurt.ObjID);
                continue;
            }
            ShotToTarget(target);
        }
    }


    public override void Run()
    {
        foreach (var bulletCurve in bulletCurves)
        {
            if (!bulletCurve.IsFinished)
                bulletCurve.Run();
        }
    }

    public override void ForceFinished()
    {
        base.ForceFinished();
        foreach (var bulletCurve in bulletCurves)
        {
            bulletCurve.ForceFinish();
        }
    }

    public override bool IsFinished()
    {
        bool isCurveFinish = false;

        foreach (var bulletCurve in bulletCurves)
        {
            isCurveFinish |= bulletCurve.IsFinished;
        }

        return isCurveFinish && base.IsFinished();
    }
}