using System;
using System.Linq;
using System.Collections.Generic;
using Continentis.MainGame.Card;
using Continentis.MainGame.Commands;
using SLSFramework.General;
using UnityEngine;

namespace Continentis.MainGame.Character
{
    public partial class DeckSubmodule : SubmoduleBase<CharacterBase>
    {
        public Dictionary<string, List<CardInstance>> piles;

        public DeckSubmodule(CharacterBase character) : base(character)
        {
            piles = new Dictionary<string, List<CardInstance>>
            {
                { Piles.Storage, new List<CardInstance>() },
                { Piles.Hand, new List<CardInstance>() },
                { Piles.Draw, new List<CardInstance>() },
                { Piles.Discard, new List<CardInstance>() },
                { Piles.Exhaust, new List<CardInstance>() },
                { Piles.Grave, new List<CardInstance>() },
                { Piles.Pool, new List<CardInstance>() },
                { Piles.Intention, new List<CardInstance>() }
            };
        }
    }

    public partial class DeckSubmodule
    {
        public void SetUpHandCardViews()
        {
            DrawPile.ForEach(card => card.GenerateHandCardView(CombatUIManager.Instance.combatMainPage.drawPile));
            HandPile.ForEach(card =>
            {
                if (!card.playSubmodule.isDuringPlayEffect)
                    card.GenerateHandCardView(CombatUIManager.Instance.combatMainPage.handPile);
            });
            DiscardPile.ForEach(c => c.GenerateHandCardView(CombatUIManager.Instance.combatMainPage.discardPile));
            ExhaustPile.ForEach(c => c.GenerateHandCardView(CombatUIManager.Instance.combatMainPage.exhaustPile));
        }

        /// <summary>抽取指定数量的卡牌，返回一个包含抽牌指令的指令组。</summary>
        public CommandGroup DrawCards(int cardCount, float interval = 0.1f)
        {
            if (owner.statusSubmodule.HasStatus(StatusType.Heavy))
            {
                MainGameManager.GenerateInfoText("Heavy: Can not draw cards", owner.characterView);
                return new CommandGroup(ExecutionMode.Sequential);
            }

            if (cardCount > DrawPile.Count && DiscardPile.Count > 0)
            {
                //Debug.Log("抽牌堆牌数不足，且弃牌堆有牌，正在洗牌...");
                ReshuffleDeck();
            }

            //Debug.Log($"准备抽取 {cardCount} 张卡牌。");

            return new CommandGroup(ExecutionMode.Sequential,
                new Cmd_DrawCards(this, cardCount, interval),
                Cmd.Do(() =>
                {
                    // TODO: 抽牌后的处理（DrawnCards 可从 groupContext 中读取）
                }));
        }

        /// <summary>从指令组的上下文中获取抽到的卡牌列表。</summary>
        public List<CardInstance> GetDrawnCards(CommandGroup drawCardsGroup)
        {
            if (drawCardsGroup.groupContext.TryGet(CommandContextKeys.DrawnCards, out List<CardInstance> cards))
                return cards;

            //Debug.LogWarning("[DeckSubmodule] groupContext 中未找到 DrawnCards。");
            return new List<CardInstance>();
        }

        /// <summary>打出指定卡牌。</summary>
        public void PlayCard(CardInstance card, List<CharacterBase> targetList)
        {
            card.Play(targetList, owner);
        }

        /// <summary>主动弃置单张卡牌，返回包含弃牌指令的指令组。</summary>
        public CommandGroup DiscardCard(CardInstance card, bool initiative, float interval = 0.1f)
        {
            return new CommandGroup(ExecutionMode.Sequential,
                new Cmd_DiscardCards(card.deck, new List<CardInstance> { card }, initiative, interval),
                Cmd.Do(() =>
                {
                    CombatUIManager.Instance.combatMainPage.teamSwitchButton.UpdateTeamPileText(owner.team);
                }));
        }

        /// <summary>主动弃置多张卡牌（按所属 deck 分组），返回包含弃牌指令的指令组。</summary>
        public CommandGroup DiscardCards(List<CardInstance> cards, bool initiative, float interval = 0.1f)
        {
            var groupedCards = cards.GroupBy(card => card.deck)
                .ToDictionary(g => g.Key, g => g.ToList());

            var group = new CommandGroup(ExecutionMode.Sequential);
            foreach (var kvp in groupedCards)
                group.AddCommand(new Cmd_DiscardCards(kvp.Key, kvp.Value, initiative, interval));

            group.AddCommand(Cmd.Do(() =>
            {
                CombatUIManager.Instance.combatMainPage.teamSwitchButton.UpdateTeamPileText(owner.team);
            }));

            return group;
        }

        /// <summary>消耗单张卡牌，返回包含消耗指令的指令组。</summary>
        public CommandGroup ExhaustCard(CardInstance card, float interval = 0.1f)
        {
            return new CommandGroup(ExecutionMode.Sequential,
                new Cmd_ExhaustCards(owner is PlayerHero, card.deck, new List<CardInstance> { card }, interval),
                Cmd.Do(() =>
                {
                    CombatUIManager.Instance.combatMainPage.teamSwitchButton.UpdateTeamPileText(owner.team);
                }));
        }

        /// <summary>消耗多张卡牌（按所属 deck 分组），返回包含消耗指令的指令组。</summary>
        public CommandGroup ExhaustCards(List<CardInstance> cards, float interval = 0.1f)
        {
            var groupedCards = cards.GroupBy(card => card.deck)
                .ToDictionary(g => g.Key, g => g.ToList());

            var group = new CommandGroup(ExecutionMode.Sequential);
            foreach (var kvp in groupedCards)
                group.AddCommand(new Cmd_ExhaustCards(owner is PlayerHero, kvp.Key, kvp.Value, interval));

            group.AddCommand(Cmd.Do(() =>
            {
                CombatUIManager.Instance.combatMainPage.teamSwitchButton.UpdateTeamPileText(owner.team);
            }));

            return group;
        }

        /// <summary>使用单张力量牌，返回包含使用指令的指令组。</summary>
        public CommandGroup UsePowerCard(CardInstance card, float interval = 0.1f)
        {
            return new CommandGroup(ExecutionMode.Sequential,
                new Cmd_UsePowerCards(owner is PlayerHero, card.deck, new List<CardInstance> { card }, interval),
                Cmd.Do(() =>
                {
                    CombatUIManager.Instance.combatMainPage.teamSwitchButton.UpdateTeamPileText(owner.team);
                }));
        }

        /// <summary>使用多张力量牌（按所属 deck 分组），返回包含使用指令的指令组。</summary>
        public CommandGroup UsePowerCards(List<CardInstance> cards, float interval = 0.1f)
        {
            var groupedCards = cards.GroupBy(card => card.deck)
                .ToDictionary(g => g.Key, g => g.ToList());

            var group = new CommandGroup(ExecutionMode.Sequential);
            foreach (var kvp in groupedCards)
                group.AddCommand(new Cmd_UsePowerCards(owner is PlayerHero, kvp.Key, kvp.Value, interval));

            group.AddCommand(Cmd.Do(() =>
            {
                CombatUIManager.Instance.combatMainPage.teamSwitchButton.UpdateTeamPileText(owner.team);
            }));

            return group;
        }

        /// <summary>将弃牌堆重新洗入抽牌堆，直接加入全局命令队列。</summary>
        public void ReshuffleDeck(float interval = 0.1f)
        {
            CommandQueueManager.Instance.AddCommand(new Cmd_ReshuffleDeck(this, interval));
        }
    }

    public partial class DeckSubmodule
    {
        public KeyValuePair<string, List<CardInstance>> GetCardLocation(CardInstance card, out int index)
        {
            index = -1;
            foreach (var pile in piles)
            {
                index = pile.Value.IndexOf(card);
                if (index != -1)
                    return pile;
            }
            throw new Exception("Card not found in any pile.");
        }

        /// <summary>将卡牌移动到指定牌堆的指定位置。</summary>
        public void TransferCard(string pileName, int index, CardInstance card)
        {
            Pile(pileName).Transfer(card, index);
            card.cardLocation = new CardLocation(pileName, index);
        }

        /// <summary>将卡牌从一个牌堆移动到另一个牌堆（按名称）。</summary>
        public void TransferCard(string fromPileName, string toPileName, CardInstance card)
        {
            List<CardInstance> fromPile = Pile(fromPileName);
            List<CardInstance> toPile = Pile(toPileName);
            fromPile.Transfer(toPile, card);
            card.cardLocation = new CardLocation(toPileName, toPile.IndexOf(card));
        }

        /// <summary>将卡牌从一个牌堆移动到另一个牌堆（按引用）。</summary>
        public void TransferCard(List<CardInstance> fromPile, List<CardInstance> toPile, CardInstance card)
        {
            fromPile.Transfer(toPile, card);
            card.cardLocation = new CardLocation(GetCardLocation(card, out _).Key, toPile.IndexOf(card));
        }

        /// <summary>返回所有牌堆中的所有卡牌。</summary>
        public List<CardInstance> GetAllCards()
        {
            var allCards = new List<CardInstance>();
            foreach (var pile in piles)
                allCards.AddRange(pile.Value);
            return allCards;
        }
    }

    public partial class DeckSubmodule
    {
        /// <summary>按名称获取牌堆，不存在时抛出 KeyNotFoundException。</summary>
        public List<CardInstance> Pile(string pileName)
        {
            if (piles.TryGetValue(pileName, out List<CardInstance> pile))
                return pile;
            throw new KeyNotFoundException($"Pile '{pileName}' not found.");
        }

        public List<CardInstance> StoragePile   => Pile(Piles.Storage);
        public List<CardInstance> HandPile       => Pile(Piles.Hand);
        public List<CardInstance> DrawPile       => Pile(Piles.Draw);
        public List<CardInstance> DiscardPile    => Pile(Piles.Discard);
        public List<CardInstance> ExhaustPile    => Pile(Piles.Exhaust);
        public List<CardInstance> GravePile      => Pile(Piles.Grave);
        public List<CardInstance> PoolPile       => Pile(Piles.Pool);
        public List<CardInstance> IntentionPile  => Pile(Piles.Intention);
    }
}