using System;
using System.Collections.Generic;
using System.Linq;
using Continentis.MainGame.Character;
using Continentis.MainGame.Commands;
using DamageNumbersPro;
using SoulliesFramework.General;
using UnityEngine;
using UniRx;

namespace Continentis.MainGame.Card
{
    public partial class CardLogicBase
    {
        public void Targeting(CharacterBase target)
        {
            TargetingEffect(target);
        }
        
        public void Untargeting()
        {
            UntargetingEffect();
        }
        
        protected virtual void TargetingEffect(CharacterBase target)
        {
            
        }

        protected virtual void UntargetingEffect()
        {
            
        }
    }

    public partial class CardLogicBase
    {
        public void RefreshCardAttributes()
        {
            if(user == null) return;
            
            attributeSubmodule.RefreshAllAttributes();
            if(handCardView == null || !handCardView.isSelecting) Untargeting();
        }
        
        public virtual void ApplyAttributeChangesByCard()
        {
            
        }
    }
    
    public partial class CardLogicBase
    {
        public virtual void SetTargets(out List<CharacterBase> valid,
            out List<CharacterBase> conditionNotMet, out List<CharacterBase> invalid)
        {
            List<CharacterBase> characters = CombatMainManager.Instance.characters;
            invalid = new List<CharacterBase>();
            conditionNotMet = new List<CharacterBase>();
            valid = new List<CharacterBase>();

            int targetCount = attributeSubmodule.targetCount;

            if (targetCount <= -2)
            {
                throw new Exception("Target count is invalid.");
            }
            
            if (targetCount == 0 || cardData.functionalTags.Contains("TargetSelf")) // 卡牌目标为自身
            {
                valid.Add(user);
                invalid.AddRange(characters);
                invalid.Remove(user);
            }
            else if (cardData.functionalTags.Contains("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 (cardData.functionalTags.Contains("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();

                        conditionNotMet.AddRange(protectedTargets);
                        valid.RemoveAll(target => !target.statusSubmodule.HasStatus(StatusType.Taunt));
                    }
                }
            }
            else if(cardData.functionalTags.Contains("TargetAll")) // 卡牌目标为全体
            {
                valid.AddRange(characters);
            }
            else
            {
                throw new Exception("No valid target found, please check the card data.");
            }
        }
        
        public virtual bool CheckBeforePlay()
        {
            Vector3 userPosition = user.characterView.transform.position;
            
            if (!CheckEnoughStamina())
            {
                MainGameManager.Instance.basePrefabs.GenerateInfoText("Not Enough Stamina", userPosition);
                return false;
            }
            
            if (!CheckEnoughMana())
            {
                MainGameManager.Instance.basePrefabs.GenerateInfoText("Not Enough Mana", userPosition);
                return false;
            }

            return true;
        }

        /*public void Play(List<CharacterBase> targetList, CharacterBase user = null, bool willCheckBeforePlay = true)
        {
            CommandQueueManager.Instance.AddCommand(_Play(targetList, user, willCheckBeforePlay));
        }*/
        
        /// <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())
            {
                eventSubmodule.onBeforePlay.Invoke(targetList);
                CommandQueueManager.Instance.AddCommand(PlayEffect(targetList));
                eventSubmodule.onAfterPlay.Invoke(targetList);
                AfterPlayEffect(targetList);
                combatBuffSubmodule.buffList.For(buff => buff.usageSubmodule?.UpdateModule());
                if (cardInstance.user is PlayerHero)
                    CombatUIManager.Instance.deckPage.combatResourcesDisplayer.UpdateIcons();
                
                return true;
            }
            else
            {
                if (handCardView != null)
                {
                    handCardView.isDuringPlaying = false;
                }
                
                return false;
            }
        }
        
        protected virtual CommandBase PlayEffect(List<CharacterBase> targetList)
        {
            ConsumeStamina();
            ConsumeMana();
            
            return null;
        }
        
        protected virtual void AfterPlayEffect(List<CharacterBase> targetList)
        {
            if (user is PlayerHero playerHero)
            {
                if (HasTag("Exhaust"))
                {
                    playerHero.deckSubmodule.ExhaustCard(cardInstance);
                }
                else
                {
                    playerHero.deckSubmodule.DiscardCard(cardInstance);
                    CommandQueueManager.Instance.AddCommand(new Cmd_Function(0, () =>
                    {
                        if (handCardView != null)
                        {
                            handCardView.isDuringPlaying = false;
                        }
                    }));
                }
            }
            else if (user is CombatNPC npc)
            {
                if (HasTag("Exhaust"))
                {
                    npc.deckSubmodule.ExhaustCard(cardInstance);
                }
            }
        }
    }

    public partial class CardLogicBase
    {
        /// <summary>
        /// 添加格挡（格挡每回合结束后会清空）
        /// </summary>
        protected void AddBlock(int block, CharacterBase target = null)
        {
            target ??= user;
            target.attributeSubmodule.generalAttributeGroup.current["Block"] += block;
            target.characterView.hudContainer.UpdateAllHUD();
        }
        
        /// <summary>
        /// 添加闪避（闪避在回合结束后或被击中后清空）
        /// </summary>
        protected void AddDodge(int dodge, CharacterBase target = null)
        {
            target ??= user;
            target.attributeSubmodule.generalAttributeGroup.current["Dodge"] += dodge;
            target.characterView.hudContainer.UpdateAllHUD();
        }
        
        /// <summary>
        /// 添加护盾（护盾不会自动清空）
        /// </summary>
        protected void AddShield(int shield, CharacterBase target = null)
        {
            target ??= user;
            target.attributeSubmodule.generalAttributeGroup.current["Shield"] += shield;
            target.characterView.hudContainer.UpdateAllHUD();
        }
    }
}