using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using DG.Tweening;
using DG.Tweening.Core;
using System.Linq;

public static class BattleUtility
{
    // 其他通用的战斗工具方法可以放在这里


    public static void MarkStartAndEnd(RectTransform startNode, RectTransform endNode)
    {
        // 运行时才执行
        if (!Application.isPlaying)
        {
            Debug.LogWarning("请在运行时使用该功能！");
            return;
        }

        var battleField = BattleManager.Instance.storyBattleField;
        if (battleField == null)
        {
            Debug.LogError("BattleManager.storyBattleField 未初始化！");
            return;
        }


        BattleWin battleWin = UIManager.Instance.GetUI<BattleWin>();

        RectTransform canvasRect = battleWin.transform as RectTransform;

        CreateMarker(canvasRect, startNode, "StartMarker");
        CreateMarker(canvasRect, endNode, "EndMarker");
    }

    private static void CreateMarker(RectTransform canvasRect, RectTransform targetNode, string markerName)
    {
        // 获取目标节点的世界坐标（中心点）
        Vector3 worldPos = targetNode.TransformPoint(targetNode.rect.center);

        // 转换到Canvas本地坐标
        Vector2 localPoint;
        RectTransformUtility.ScreenPointToLocalPointInRectangle(
            canvasRect,
            RectTransformUtility.WorldToScreenPoint(null, worldPos),
            null,
            out localPoint);

        // 创建RawImage
        GameObject marker = new GameObject(markerName, typeof(RawImage));
        GameObject.Destroy(marker, 5f);
        marker.transform.SetParent(canvasRect, false);
        var rawImage = marker.GetComponent<RawImage>();
        rawImage.color = Color.white;
        rawImage.rectTransform.sizeDelta = new Vector2(100, 100);
        rawImage.rectTransform.anchoredPosition = localPoint;
    }


    public static TweenerCore<Vector2, Vector2, DG.Tweening.Plugins.Options.VectorOptions> MoveToTarget(
        RectTransform transform, RectTransform target, Vector2 offset, Action onComplete = null, float speed = 500f)
    {
        // 获取目标节点的世界坐标（锚点位置）
        Vector3 worldPos = target.position;

        // 如果需要加 offset，需考虑 scale
        Vector3 offsetWorld = target.TransformVector(offset);
        worldPos += offsetWorld;

        RectTransform canvasRect = transform.parent as RectTransform;

        // 转换到Canvas本地坐标
        Vector2 localPoint;
        RectTransformUtility.ScreenPointToLocalPointInRectangle(
            canvasRect,
            RectTransformUtility.WorldToScreenPoint(null, worldPos),
            null,
            out localPoint);

        float distance = Vector2.Distance(transform.anchoredPosition, localPoint);
        float duration = distance / speed;

        var tween = transform.DOAnchorPos(localPoint, duration).SetEase(Ease.Linear);
        tween.onComplete += () =>
        {
            onComplete?.Invoke();
        };

        return tween;
    }

    public static string DisplayDamageNum(long num, int attackType)
    {
        var config = DamageNumConfig.Get(attackType);
        var basePowerStr = UIHelper.ReplaceLargeArtNum(num);
        var result = string.Empty;
        for (int i = 0; i < basePowerStr.Length; i++)
        {
            var numChar = (char)GetDamageNumKey(config, basePowerStr[i]);
            if (numChar > 0)
            {
                result += numChar;
            }
        }
        return result;
    }

    public static string DisplayDamageNum(BattleDmg damage)
    {
        var config = DamageNumConfig.Get(damage.attackType);

        string result = string.Empty;

        //  如果是闪避 则只显示闪避两个字
        if (damage.IsType(DamageType.Dodge))
        {
            result += (char)config.prefix;
        }
        else
        {
            result = ConvertToArtFont(config, damage.damage);
        }

        return result;
    }

    static string ConvertToArtFont(DamageNumConfig config, float _num)
    {
        var stringBuild = new System.Text.StringBuilder();

        if (0 != config.plus)
            stringBuild.Append((char)config.plus);
        if (0 != config.prefix)
            stringBuild.Append((char)config.prefix);

        var chars = UIHelper.ReplaceLargeArtNum(_num);
        for (var i = 0; i < chars.Length; i++)
        {
            int numChar = GetDamageNumKey(config, (int)chars[i]);

            if (numChar > 0)
            {
                stringBuild.Append((char)numChar);
            }
        }

        return stringBuild.ToString();
    }

    public static int GetMainTargetPositionNum(BattleObject caster, List<HB427_tagSCUseSkill.tagSCUseSkillHurt> targetList, SkillConfig skillConfig)
    {
        int returnIndex = 0;
        //  根据敌方血量阵营 存活人数来选择
        BattleCamp battleCamp = skillConfig.TagFriendly != 0 ? caster.Camp : caster.GetEnemyCamp();
        List<BattleObject> targetObjList = caster.battleField.battleObjMgr.GetBattleObjList(battleCamp);


        // 瞄准的目标范围，如果目标个数为0则为范围内全部
        // 0    全部范围
        // 1    对位，默认只选1个
        // 2    前排
        // 3    后排
        // 4    纵排，按对位规则选择纵排
        // 5    自己，默认只选自己

        switch (skillConfig.TagAim)
        {
            case 0:
                // 0   全部范围：
                // 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
                // 若TagCount目标个数为1~5个，根据TagFriendly敌我+TagAffect细分目标配置，代表随机作用于敌方或我方x个武将，第一个为主目标
                if (skillConfig.TagCount == 0 || skillConfig.TagCount == 6)
                {
                    returnIndex = 1;
                }
                else
                {
                    uint objId = targetList[0].ObjID;
                    BattleObject target = caster.battleField.battleObjMgr.GetBattleObject((int)objId);
                    return target.teamHero.positionNum;
                }
                break;
            case 1:
                // 1    对位：
                // 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 (targetList.Count > 0)
                {
                    BattleObject battleObject = caster.battleField.battleObjMgr.GetBattleObject((int)targetList[0].ObjID);
                    if (battleObject != null)
                    {
                        returnIndex = battleObject.teamHero.positionNum;
                    }
                    else
                    {
                        Debug.LogError("GetMainTargetPositionNum 找不到目标 ObjId : " + targetList[0].ObjID);
                        returnIndex = 0;
                    }
                }
                else
                {
                    Debug.LogError("targetList 目标列表为空");
                    returnIndex = 0;
                }
                break;
            case 2:
                //  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） (YL : TagAffect>0 && TagAffect != 3就是全体都是主目标 后排一样 )
                if (skillConfig.TagAffect != 0 || skillConfig.TagCount < 3)
                {
                    uint objId = targetList[0].ObjID;
                    BattleObject target = caster.battleField.battleObjMgr.GetBattleObject((int)objId);
                    returnIndex = target.teamHero.positionNum;
                }
                else
                {
                    //  看看对面前排是否都活着
                    List<BattleObject> front = new List<BattleObject>(from bo in targetObjList where !bo.IsDead() && bo.teamHero.positionNum < 3 select bo);
                    if (front.Count > 0)
                    {
                        returnIndex = 1;
                    }
                    else
                    {
                        returnIndex = 4;
                    }
                }
                break;
            case 3:
                if (skillConfig.TagAffect != 0 || skillConfig.TagCount < 3)
                {
                    uint objId = targetList[0].ObjID;
                    BattleObject target = caster.battleField.battleObjMgr.GetBattleObject((int)objId);
                    returnIndex = target.teamHero.positionNum;
                }
                else
                {
                    //  看看对面后排是否都活着
                    List<BattleObject> back = new List<BattleObject>(from bo in targetObjList where !bo.IsDead() && bo.teamHero.positionNum >= 3 select bo);
                    if (back.Count > 0)
                    {
                        returnIndex = 4;
                    }
                    else
                    {
                        returnIndex = 1;
                    }
                }
                break;
            // 4    纵排，按对位规则选择纵排
            case 4:
                returnIndex = int.MaxValue;
                for (int i = 0; i < targetList.Count; i++)
                {
                    var hurt = targetList[i];
                    BattleObject target = caster.battleField.battleObjMgr.GetBattleObject((int)hurt.ObjID);
                    if (target == null)
                    {
                        Debug.LogError("GetMainTargetPositionNum 找不到目标 ObjId : " + hurt.ObjID);
                        continue;
                    }
                    else
                    {
                        returnIndex = Mathf.Min(returnIndex, target.teamHero.positionNum);
                    }
                }
                break;
            // 5    自己，默认只选自己
            case 5:
                returnIndex = caster.teamHero.positionNum;
                break;
            default:
                Debug.LogError("暂时不支持其他的方式选择主目标 有需求请联系策划 技能id:" + skillConfig.SkillID + " TagAim " + skillConfig.TagAim);
                returnIndex = 0;
                break;
        }

        return returnIndex;
    }

    public static int GetDamageNumKey(DamageNumConfig config, int _num)
    {
        if (_num == 46)      return config.nums[10]; // '.'
        else if (_num == 107) return config.nums[11]; // 'k'
        else if (_num == 109) return config.nums[12]; // 'm'
        else if (_num == 98)  return config.nums[13]; // 'b'
        else if (_num == 116) return config.nums[14]; // 't'
        int targetNum = _num - 48;
        if (targetNum >= config.nums.Length || targetNum < 0)
        {
            Debug.LogError("damage config " + config.TypeID + " _num is " +  _num + " out of range");
            return _num;
        }
        return config.nums[_num - 48];
    }

    /// <summary>
    /// 保证所有分配项加起来等于totalDamage，避免因整除导致的误差
    /// </summary>
    public static List<long> DivideDamageToList(int[] damageDivide, long totalDamage)
    {
        List<long> fixedDamageList = new List<long>();

        for (int i = 0; i < damageDivide.Length; i++)
        {
            float fixedDamage = (float)totalDamage * (float)damageDivide[i] / 10000f;
            fixedDamageList.Add((int)fixedDamage);
        }
        
        return fixedDamageList;
    }

    public static List<HB422_tagMCTurnFightObjDead> FindDeadPack(List<GameNetPackBasic> packList)
    {
        List<HB422_tagMCTurnFightObjDead> deadPacks = new List<HB422_tagMCTurnFightObjDead>();
        for (int i = 0; i < packList.Count; i++)
        {
            var pack = packList[i];
            //	寻找死亡包 找到死亡包之后要找掉落包 不能超过技能包
            if (pack is HB422_tagMCTurnFightObjDead deadPack)
            {
                deadPacks.Add(deadPack);
            }
            else if (pack is CustomHB426CombinePack)
            {
                break;
            }
        }
        // Debug.LogError("find dead pack " + deadPacks.Count);
        return deadPacks;
    }


    public static List<HB423_tagMCTurnFightObjReborn> FindRebornPack(List<GameNetPackBasic> packList)
    {
        List<HB423_tagMCTurnFightObjReborn> rebornPackList = new List<HB423_tagMCTurnFightObjReborn>();
        for (int i = 0; i < packList.Count; i++)
        {
            var pack = packList[i];
            //	寻找死亡包 找到死亡包之后要找掉落包 不能超过技能包
            if (pack is HB423_tagMCTurnFightObjReborn rebornPack)
            {
                rebornPackList.Add(rebornPack);
            }
            else if (pack is CustomHB426CombinePack)
            {
                break;
            }
        }
        return rebornPackList;
    }
}