using System;
using System.Collections.Generic;
using System.Linq;
using Continentis.MainGame.Character;
using Continentis.MainGame.Combat;
using Continentis.MainGame.Commands;
using SLSUtilities.General;
using SLSUtilities.UModAssistance;
using UniRx;
using UnityEngine;
using Random = UnityEngine.Random;

namespace Continentis.MainGame.Card
{
    public partial class CardInstance
    {
        /// <summary>
        /// 选中目标时触发的效果，效果在所有逻辑组件的Targeting之前执行（在SetUp函数生成EventSubmodule的时候）。
        /// 如果必须需要在逻辑组件之后执行，请重写Initialize函数。
        /// </summary>
        public virtual void Targeting(CharacterBase target)
        {
            currentTextTarget = target;
            eventSubmodule.onTargeting.Invoke(target);
        }

        /// <summary>
        /// 取消选中目标时触发的效果，效果在所有逻辑组件的Untargeting之前执行（在SetUp函数生成EventSubmodule的时候）。
        /// 如果必须需要在逻辑组件之后执行，请重写Initialize函数。
        /// </summary>
        public virtual void Untargeting()
        {
            currentTextTarget = null;
            eventSubmodule.onUntargeting.Invoke();
        }
    }

    public partial class CardInstance
    {
        /// <summary>
        /// 刷新卡牌属性
        /// </summary>
        public void RefreshCardAttributes()
        {
            if(user == null) return;
            
            attributeSubmodule.RefreshAllAttributes();
            Untargeting();
            /*if ((handCardView == null && intentionCardView == null))
            {
                Untargeting();
            }
            else
            {
                if (handCardView != null && !handCardView.isSelecting)
                {
                    Untargeting();
                }
            }*/
            
            contentSubmodule.dirtyMark = true;
        }
        
        /// <summary>
        /// 根据卡牌内容应用属性变化
        /// </summary>
        public void ApplyAttributeChangesByCard()
        {
            cardLogic.ApplyAttributeChangesByCard();
        }
    }
    
    public partial class CardInstance
    {
        public virtual void DetectTargetsValidity(out List<CharacterBase> valid, out List<CharacterBase> notMet, out List<CharacterBase> invalid)
        {
            List<CharacterBase> characters = CombatMainManager.Instance.characterController.characters;
            invalid = new List<CharacterBase>(characters);
            notMet = new List<CharacterBase>();
            valid = new List<CharacterBase>();

            int targetCount = attributeSubmodule.targetCount;

            if (targetCount <= -2)
            {
                Debug.LogError("Invalid target count setting on card: " + contentSubmodule.cardName);
                return;
            }

            if (HasKeyword("TargetAll"))
            {
                valid.AddRange(characters);
            }
            else
            {
                if (HasKeyword("TargetAllies") || HasKeyword("Blessing"))
                {
                    valid.AddRange(user.fraction is Fraction.Ally or Fraction.Player
                        ? characters.Where(character => character.fraction is Fraction.Ally or Fraction.Player)
                        : characters.Where(character => character.fraction == user.fraction));
                    valid.Remove(user);
                }
                
                if (HasKeyword("TargetSelf"))
                {
                    valid.Add(user);
                }

                if (HasKeyword("TargetEnemies"))
                {
                    valid.AddRange(user.fraction is Fraction.Ally or Fraction.Player
                        ? characters.Where(character => character.fraction is Fraction.Enemy or Fraction.Neutral)
                        : characters.Where(character => character.fraction != user.fraction));
                    
                    //处理保护，挑衅等（仅对非全体目标卡牌生效）
                    if (targetCount != -1)
                    {
                        // 保护：被保护的目标不可选
                        List<CharacterBase> protectedTargets = valid.Where(target => target.statusSubmodule.HasStatus(StatusType.Protected)).ToList();
                        notMet.AddRange(protectedTargets);
                        valid.RemoveRange(protectedTargets);
                        
                        // 挑衅：若使用者处于被挑衅状态，则只能选择挑衅者
                        if (user.statusSubmodule.HasStatus(StatusType.Provoked) && user.statusSubmodule.provokers.Count > 0)
                        {
                            List<CharacterBase> provokers = user.statusSubmodule.provokers;
                            List<CharacterBase> nonProvokerTargets = valid.Where(target => !provokers.Contains(target)).ToList();
                            notMet.AddRange(nonProvokerTargets);
                            valid.RemoveRange(nonProvokerTargets);
                        }
                    }
                }
            }

            foreach (CharacterBase validTarget in valid)
            {
                invalid.Remove(validTarget);
            }
        }

        public virtual List<CharacterBase> SetRandomTargets(List<CharacterBase> valid)
        {
            List<CharacterBase> targets = new List<CharacterBase>();
            int maximumTargets = attributeSubmodule.targetCount;
            if (maximumTargets == -1 || maximumTargets >= valid.Count)
            {
                targets.AddRange(valid);
            }
            else
            {
                bool allowDuplicate = HasKeyword(CardKeywords.AllowDuplicateTargets);

                if (allowDuplicate)
                {
                    // 放回抽样：可重复选中同一目标
                    for (int i = 0; i < maximumTargets; i++)
                    {
                        targets.Add(valid[Random.Range(0, valid.Count)]);
                    }
                }
                else
                {
                    // 不放回抽样（原逻辑）
                    List<CharacterBase> pool = new List<CharacterBase>(valid);
                    while (targets.Count < maximumTargets && pool.Count > 0)
                    {
                        CharacterBase target = pool[Random.Range(0, pool.Count)];
                        pool.Remove(target);
                        targets.Add(target);
                    }
                }
            }
            
            return targets;
        }
        
        public virtual bool CheckBeforePlay()
        {
            if (!user.CheckEnoughStamina(GetAttribute(CardAttributes.StaminaCost)))
            {
                MainGameManager.Instance.basePrefabs.GenerateInfoText("Not Enough Stamina", user.characterView);
                return false;
            }
            
            if (!user.CheckEnoughMana(GetAttribute(CardAttributes.ManaCost)))
            {
                MainGameManager.Instance.basePrefabs.GenerateInfoText("Not Enough Mana", user.characterView);
                return false;
            }

            return true;
        }
        
        /// <summary>
        /// 打出卡牌
        /// 注意，这个函数内部包含了命令队列的调用
        /// </summary>
        /// <param name="targetList">目标列表</param>
        /// <param name="user">使用者</param>
        /// <param name="noConsumption">是否不消耗资源</param>
        /// <param name="willCheckBeforePlay">打出之前是否进行可用性检测</param>
        public bool Play(List<CharacterBase> targetList, CharacterBase user = null, 
            bool willCheckBeforePlay = true,  bool noConsumption = false)
        {
            if (handCardView != null)
            {
                if (handCardView.isDuringPlaying)
                {
                    return false;
                }

                handCardView.isDuringPlaying = true;
            }
            
            this.user = user ?? CombatMainManager.Instance.currentCharacter;
            this.user.recordSubmodule.RecordCardPlay(this);
            
            if (!willCheckBeforePlay || CheckBeforePlay())
            {
                if (!noConsumption)
                {
                    this.user.ModifyStamina(-GetAttribute(CardAttributes.StaminaCost));
                    this.user.ModifyMana(-GetAttribute(CardAttributes.ManaCost));
                }

                Debug.Log($"Starting to play card: {contentSubmodule.cardName}");
                
                CommandQueueManager.Instance.AddCommand(Cmd.Do(() =>
                {
                    playSubmodule.isDuringPlayEffect = true;
                    eventSubmodule.onBeforePlay.Invoke(targetList);
                    this.user.eventSubmodule?.onBeforePlayCard.Invoke(this, targetList);
                    this.user.combatBuffSubmodule.buffList.For(buff =>
                    {
                        buff.eventSubmodule?.onBeforePlayCard.Invoke(this, targetList);
                    });
                }));
                
                CommandQueueManager.Instance.AddCommand(PlayEffect(targetList));
                CommandQueueManager.Instance.AddCommand(cardLogic.PlayEffect(targetList));
                CommandQueueManager.Instance.AddCommand(Cmd.Do(() =>
                {
                    eventSubmodule.onAfterPlay.Invoke(targetList);
                    combatBuffSubmodule.buffList.For(buff => buff.usageSubmodule?.UpdateModule());
                    this.user.eventSubmodule.onAfterPlayCard.Invoke(this, targetList);
                    this.user.combatBuffSubmodule.buffList.For(buff =>
                    {
                        buff.eventSubmodule?.onAfterPlayCard.Invoke(this, targetList);
                    });
                    AfterPlayEffect(targetList);
                    cardLogic.AfterPlayEffect(targetList);
                    playSubmodule.isDuringPlayEffect = false;
                    if (handCardView != null)
                    {
                        handCardView.isDuringPlaying = false;
                    }
                }));
                return true;
            }
            else
            {
                if (handCardView != null)
                {
                    handCardView.isDuringPlaying = false;
                }
                
                return false;
            }
        }
        
        protected virtual CommandGroup PlayEffect(List<CharacterBase> targetList)
        {
            return new CommandGroup();
        }
        
        protected virtual void AfterPlayEffect(List<CharacterBase> targetList)
        {
            if (contentSubmodule.cardType == CardType.Power)
            {
                CommandQueueManager.Instance.AddCommand(user.deckSubmodule.UsePowerCard(this));
                return;
            }
            
            if (HasKeyword("Exhaust"))
            {
                CommandQueueManager.Instance.AddCommand(user.deckSubmodule.ExhaustCard(this));
                return;
            }
                
            if(HasKeyword("Exhaustible"))
            {
                if (!HasAttribute("ExhaustibleCount"))
                {
                    Debug.LogError("Exhaustible card missing ExhaustibleCount attribute: " + contentSubmodule.cardName);
                    CommandQueueManager.Instance.AddCommand(user.deckSubmodule.ExhaustCard(this));
                    return;
                }
                
                ModifyAttribute("ExhaustibleCount", -1);
                
                if(GetAttribute("ExhaustibleCount") <= 0)
                {
                    CommandQueueManager.Instance.AddCommand(user.deckSubmodule.ExhaustCard(this));
                    return;
                }
            }
            
            if (user is PlayerHero playerHero)
            {
                if(!HasKeyword("Reuseable"))
                {
                    CommandQueueManager.Instance.AddCommand(playerHero.deckSubmodule.DiscardCard(this, false));
                    CommandQueueManager.Instance.AddCommand(new Cmd_Function(() =>
                    {
                        if (handCardView != null)
                        {
                            handCardView.isDuringPlaying = false;
                        }
                    }));
                }
            }
            else if (user is CombatNPC npc)
            {
                
            }
        }
    }

    public partial class CardInstance
    {
        public void UpgradeCard()
        {
            if (owner is not CombatTeam)
            {
                KeyValuePair<string, List<CardInstance>> currentPile = deck.GetCardLocation(this, out int index);
                if (!cardData.upgradeNode.isTerminalNode)
                {
                    // 先 Dispose 旧 Logic，再替换，避免旧 Logic 的托管订阅泄漏
                    cardLogic?.Dispose();
                    DestroyHandCardView();

                    CardData newData = cardData.upgradeNode.upgradeCards[0]; //后续可改为选择升级方向
                    CardLogicBase newLogic = CardLogicBase.GenerateCardLogic(newData);
                    this.cardLogic = newLogic;
                    newLogic.card = this;
                    this.cardLogic.Initialize(this);
                    if (user is PlayerHero)
                        GenerateHandCardView(CombatUIManager.Instance.combatMainPage.Pile(currentPile.Key), index);
                }
            }
            else
            {

            }
        }
    }
}