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

namespace Continentis.MainGame.Card
{
    public partial class CardLogicBase
    {
        /// <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 TargetingEffect(CharacterBase 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 UntargetingEffect()
        {
            
        }
    }

    public partial class CardLogicBase
    {
        /// <summary>
        /// 刷新卡牌属性
        /// </summary>
        public void RefreshCardAttributes()
        {
            if(user == null) return;
            
            attributeSubmodule.RefreshAllAttributes();
            if ((handCardView == null && intentionCardView == null) || !handCardView.isSelecting)
            {
                eventSubmodule.onUntargeting();
            }
        }
        
        /// <summary>
        /// 根据卡牌内容应用属性变化
        /// </summary>
        public virtual void ApplyAttributeChangesByCard()
        {
            
        }
    }
    
    public partial class CardLogicBase
    {
        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>();
            notMet = new List<CharacterBase>();
            valid = new List<CharacterBase>();

            int targetCount = attributeSubmodule.targetCount;

            if (targetCount <= -2)
            {
                return;
            }
            
            if (targetCount == 0 || HasKeyword("TargetSelf")) // 卡牌目标为自身
            {
                valid.Add(user);
                invalid.AddRange(characters);
                invalid.Remove(user);
            }
            else if (HasKeyword("TargetAllies")) // 卡牌目标为友方单位
            {
                if(user.fraction is Fraction.Ally or Fraction.Player)
                {
                    foreach (CharacterBase character in characters)
                    {
                        if (character.fraction is Fraction.Ally or Fraction.Player)
                        {
                            valid.Add(character);
                        }
                        else
                        {
                            invalid.Add(character);
                        }
                    }
                }
                else
                {
                    foreach (CharacterBase character in characters)
                    {
                        if (character.fraction == user.fraction)
                        {
                            valid.Add(character);
                        }
                        else
                        {
                            invalid.Add(character);
                        }
                    }
                }
            }
            else if (HasKeyword("TargetEnemies")) // 卡牌目标为敌人
            {
                if (user.fraction is Fraction.Ally or Fraction.Player)
                {
                    foreach (CharacterBase character in characters)
                    {
                        if (character.fraction is Fraction.Enemy or Fraction.Neutral)
                        {
                            valid.Add(character);
                        }
                        else
                        {
                            invalid.Add(character);
                        }
                    }
                }
                else
                {
                    foreach (CharacterBase character in characters)
                    {
                        if (character.fraction != user.fraction)
                        {
                            valid.Add(character);
                        }
                        else
                        {
                            invalid.Add(character);
                        }
                    }
                }

                if (targetCount != -1)
                {
                    if (valid.Any(target => target.statusSubmodule.HasStatus(StatusType.Taunt)))
                    {
                        List<CharacterBase> protectedTargets = valid
                            .Where(target => !target.statusSubmodule.HasStatus(StatusType.Taunt))
                            .ToList();

                        notMet.AddRange(protectedTargets);
                        valid.RemoveAll(target => !target.statusSubmodule.HasStatus(StatusType.Taunt));
                    }
                }
            }
            else if(HasKeyword("TargetAll")) // 卡牌目标为全体
            {
                valid.AddRange(characters);
            }
            else
            {
                valid.AddRange(characters);// 默认卡牌目标为所有单位
                Debug.Log("No valid target found");
            }
        }

        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
            {
                while (targets.Count < maximumTargets && valid.Count > 0)
                {
                    CharacterBase target = valid[Random.Range(0, valid.Count)];
                    valid.Remove(target);
                    targets.Add(target);
                }
            }
            
            return targets;
        }
        
        public virtual bool CheckBeforePlay()
        {
            if (!user.CheckEnoughStamina(GetAttribute("StaminaCost")))
            {
                MainGameManager.Instance.basePrefabs.GenerateInfoText("Not Enough Stamina", user.characterView);
                return false;
            }
            
            if (!user.CheckEnoughMana(GetAttribute("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="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)
        {
            if (handCardView != null)
            {
                if (handCardView.isDuringPlaying)
                {
                    return false;
                }

                handCardView.isDuringPlaying = true;
            }
            
            cardInstance.user = user ?? CombatMainManager.Instance.currentCharacter;
            
            if (!willCheckBeforePlay || CheckBeforePlay())
            {
                cardInstance.user.ModifyStamina(-GetAttribute("StaminaCost"));
                cardInstance.user.ModifyMana(-GetAttribute("ManaCost"));
                
                if (cardInstance.user is PlayerHero)
                {
                    CombatUIManager.Instance.combatMainPage.combatResourcesDisplayer.UpdateIcons();
                }
                
                Debug.Log($"Starting to play card: {contentSubmodule.cardName}");
                
                CommandQueueManager.Instance.AddCommand(new Cmd_Function(() =>
                {
                    playSubmodule.isDuringPlayEffect = true;
                    eventSubmodule.onBeforePlay.Invoke(targetList);
                    cardInstance.user.eventSubmodule?.onBeforePlayCard.Invoke(cardInstance, targetList);
                    cardInstance.user.combatBuffSubmodule.buffList.For(buff =>
                    {
                        buff.eventSubmodule?.onBeforePlayCard.Invoke(cardInstance, targetList);
                    });
                }));
                
                CommandQueueManager.Instance.AddCommand(PlayEffect(targetList));
                CommandQueueManager.Instance.AddCommand(new Cmd_Function(() =>
                {
                    eventSubmodule.onAfterPlay.Invoke(targetList);
                    combatBuffSubmodule.buffList.For(buff => buff.usageSubmodule?.UpdateModule());
                    cardInstance.user.eventSubmodule.onAfterPlayCard.Invoke(cardInstance, targetList);
                    cardInstance.user.combatBuffSubmodule.buffList.For(buff =>
                    {
                        buff.eventSubmodule?.onAfterPlayCard.Invoke(cardInstance, targetList);
                    });
                    AfterPlayEffect(targetList);
                    playSubmodule.isDuringPlayEffect = false;
                }));
                return true;
            }
            else
            {
                if (handCardView != null)
                {
                    handCardView.isDuringPlaying = false;
                }
                
                return false;
            }
        }
        
        protected virtual CommandBase PlayEffect(List<CharacterBase> targetList)
        {
            return null;
        }
        
        protected virtual void AfterPlayEffect(List<CharacterBase> targetList)
        {
            if (user is PlayerHero playerHero)
            {
                if (HasKeyword("Exhaust"))
                {
                    playerHero.deckSubmodule.ExhaustCard(cardInstance);
                }
                else
                {
                    playerHero.deckSubmodule.DiscardCard(cardInstance);
                    CommandQueueManager.Instance.AddCommand(new Cmd_Function(() =>
                    {
                        if (handCardView != null)
                        {
                            handCardView.isDuringPlaying = false;
                        }
                    }));
                }
            }
            else if (user is CombatNPC npc)
            {
                if (HasKeyword("Exhaust"))
                {
                    npc.deckSubmodule.ExhaustCard(cardInstance);
                }
            }
        }
    }

    public partial class CardLogicBase
    {

    }
}