using System;
using System.Collections.Generic;
using System.Linq;
using Continentis.MainGame.Character;
using Continentis.MainGame.Equipment;
using SLSFramework.General;
using SLSFramework.UModAssistance;
using UnityEngine;

namespace Continentis.MainGame.Card
{
    public abstract partial class CardLogicBase
    {
        [Header("Reference")]
        public CardInstance card;
        public CardData cardData => card.cardData;
        public CharacterBase user => card.user;
        public HashSet<CardLogicComponentBase> logicComponents { get; private set; }

        /// <summary>生成卡牌逻辑实例。</summary>
        public static CardLogicBase GenerateCardLogic(CardData data)
        {
            string typeID = ModManager.GetTypeID(data.modName, "Cards", data.categoryName, data.className);
            Type logicType = ModManager.GetType(typeID);

            if (logicType == null)
            {
                Debug.LogError($"Card class '{typeID}' not found in assemblies.");
                return null;
            }

            if (Activator.CreateInstance(logicType) is CardLogicBase cardLogic)
                return cardLogic;

            Debug.LogError($"Card class '{typeID}' not found or could not be instantiated.");
            return null;
        }

        public virtual void Initialize(CardInstance cardInstance)
        {
            card = cardInstance;
            logicComponents = new HashSet<CardLogicComponentBase>();
            card.eventSubmodule.onTargeting += TargetingEffect;
            card.eventSubmodule.onUntargeting += UntargetingEffect;
        }

        public virtual void SetUpLogicComponents() { }

        public T AddLogicComponent<T>() where T : CardLogicComponentBase, new()
        {
            if (logicComponents.Any(component => component is T))
            {
                Debug.LogWarning($"Card {card.cardData.className} already has component of type {typeof(T)}, cannot add duplicate.");
                return null;
            }

            T component = new T();
            component.Initialize(this);
            logicComponents.Add(component);
            return component;
        }

        public T LogicComponent<T>() where T : CardLogicComponentBase
        {
            return logicComponents.OfType<T>().FirstOrDefault();
        }

        public virtual void ApplyAttributeChangesByCard() { }

        /// <summary>卡牌出牌效果，返回一个 CommandGroup 供队列执行。</summary>
        public virtual CommandGroup PlayEffect(List<CharacterBase> targetList)
        {
            return new CommandGroup();
        }

        public virtual void AfterPlayEffect(List<CharacterBase> targetList) { }
    }

    #region Attributes
    public partial class CardLogicBase
    {
        /// <summary>设置可变属性值。</summary>
        public void SetVariableAttribute(string attributeName, int baseOffset, bool additive = false, int originalValue = 0)
        {
            card.SetVariableAttribute(attributeName, baseOffset, additive, originalValue);
        }

        /// <summary>检查卡牌是否具有某属性。</summary>
        public bool HasAttribute(string attributeName) => card.HasAttribute(attributeName);

        /// <summary>获取卡牌的属性值。</summary>
        public int GetAttribute(string attributeName, int defaultValue = 0) => card.GetAttribute(attributeName, defaultValue);

        public float GetRawAttribute(string attributeName, float defaultValue = 0) => card.GetRawAttribute(attributeName, defaultValue);

        /// <summary>设置卡牌的属性值（int）。</summary>
        public void SetAttribute(string attributeName, int value) => card.SetAttribute(attributeName, value);

        /// <summary>设置卡牌的属性值（float）。</summary>
        public void SetAttribute(string attributeName, float value) => card.SetAttribute(attributeName, value);

        /// <summary>修改卡牌的属性值。</summary>
        public void ModifyAttribute(string attributeName, int delta) => card.ModifyAttribute(attributeName, delta);
    }
    #endregion

    #region Command
    public partial class CardLogicBase
    {
        // ── 新 API：闭包工厂（推荐，Mod 制作者优先使用） ─────────────────────

        /// <summary>
        /// 对 targetList 中的每个目标调用工厂 lambda，生成的命令按 mainExecutionMode 组合。
        /// </summary>
        protected CommandGroup ForEachTarget(
            List<CharacterBase> targetList,
            Func<CharacterBase, CommandBase> factory,
            ExecutionMode mainExecutionMode = ExecutionMode.Sequential)
        {
            var group = new CommandGroup(mainExecutionMode);
            foreach (CharacterBase target in targetList)
            {
                CharacterBase captured = target;
                group.AddCommand(factory(captured));
            }
            return group;
        }

        /// <summary>
        /// 对 targetList 中的每个目标调用工厂 lambda，生成的 CommandGroup 按 mainExecutionMode 组合。
        /// </summary>
        protected CommandGroup ForEachTarget(
            List<CharacterBase> targetList,
            Func<CharacterBase, CommandGroup> factory,
            ExecutionMode mainExecutionMode = ExecutionMode.Sequential)
        {
            var group = new CommandGroup(mainExecutionMode);
            foreach (CharacterBase target in targetList)
            {
                CharacterBase captured = target;
                group.AddCommand(factory(captured));
            }
            return group;
        }

        // ── 旧 API：模板 Clone 模式（保留供向后兼容，后续迁移完成后移除） ──

        /// <summary>
        /// 克隆命令模板列表，组合为单个并行 CommandGroup。
        /// </summary>
        protected CommandGroup SingleCommandGroup(params CommandBase[] commands)
        {
            return SingleCommandGroup(ExecutionMode.Parallel, commands);
        }

        /// <summary>
        /// 克隆命令模板列表，按 executionMode 组合为单个 CommandGroup。
        /// </summary>
        protected virtual CommandGroup SingleCommandGroup(
            ExecutionMode executionMode = ExecutionMode.Parallel, params CommandBase[] commands)
        {
            var group = new CommandGroup(executionMode);
            foreach (CommandBase template in commands)
                group.AddCommand(template.Clone());
            return group;
        }

        /// <summary>
        /// 对目标列表中的每个目标克隆命令模板并注入 Target，生成嵌套 CommandGroup。
        /// 新代码请改用 <see cref="ForEachTarget"/> 闭包工厂模式。
        /// </summary>
        [Obsolete("请改用 ForEachTarget(targetList, target => ...) 闭包工厂模式。")]
        protected CommandGroup TargetListCommandGroup(
            List<CharacterBase> targetList,
            params CommandBase[] singleCommands)
        {
            return TemplateTargetGroup(targetList, ExecutionMode.Sequential, ExecutionMode.Parallel, singleCommands);
        }

        /// <summary>
        /// 对目标列表中的每个目标克隆命令模板并注入 Target，生成嵌套 CommandGroup。
        /// 新代码请改用 <see cref="ForEachTarget"/> 闭包工厂模式。
        /// </summary>
        [Obsolete("请改用 ForEachTarget(targetList, target => ...) 闭包工厂模式。")]
        protected virtual CommandGroup TargetListCommandGroup(
            List<CharacterBase> targetList,
            ExecutionMode mainExecutionMode = ExecutionMode.Sequential,
            ExecutionMode singleExecutionMode = ExecutionMode.Parallel,
            params CommandBase[] singleCommands)
        {
            return TemplateTargetGroup(targetList, mainExecutionMode, singleExecutionMode, singleCommands);
        }

        /// <summary>
        /// 模板 Clone 模式的底层实现，供旧代码向后兼容。
        /// 克隆每条模板命令并向所有子命令的 selfContext 注入 Target。
        /// </summary>
        protected virtual CommandGroup TemplateTargetGroup(
            List<CharacterBase> targetList,
            ExecutionMode mainExecutionMode = ExecutionMode.Sequential,
            ExecutionMode singleExecutionMode = ExecutionMode.Parallel,
            params CommandBase[] singleCommands)
        {
            var mainGroup = new CommandGroup(mainExecutionMode);

            foreach (CharacterBase target in targetList)
            {
                var singleGroup = new CommandGroup(singleExecutionMode);

                foreach (CommandBase template in singleCommands)
                {
                    CommandBase clone = template.Clone();

                    // 收集所有子命令（含嵌套组内的命令）并注入 Target
                    var allCommands = clone is CommandGroup group
                        ? group.GetAllCommands(true)
                        : new List<CommandBase> { clone };

                    foreach (CommandBase cmd in allCommands)
                        cmd.selfContext.Set(CommandContextKeys.Target, target);

                    singleGroup.AddCommand(clone);
                }

                mainGroup.AddCommand(singleGroup);
            }

            return mainGroup;
        }
    }
    #endregion

    #region Attack
    public partial class CardLogicBase
    {
        /// <summary>获取对指定目标的最终伤害值。</summary>
        public virtual int GetTargetedFinalDamage(CharacterBase target, List<string> elementalTags = null)
        {
            return GetFinalDamage(target, elementalTags, out _, out _, out _, out _);
        }

        /// <summary>获取无目标时的最终伤害值。</summary>
        public virtual int GetNoTargetFinalDamage(List<string> elementalTags = null)
        {
            return GetFinalDamage(null, elementalTags, out _, out _, out _, out _);
        }

        protected virtual int GetFinalDamage(
            CharacterBase target, List<string> elementalTags,
            out float baseDamageAfterOffset, out float elementalMultiplier,
            out float magicMultiplier, out float finalMultiplier)
        {
            bool haveTarget = target != null;
            elementalTags ??= card.GetElementalKeywords();

            int physicsOffset = 0;
            if (card.HasKeyword("Physics") || card.HasKeyword("Slash") || card.HasKeyword("Prick") || card.HasKeyword("Strike"))
                physicsOffset = user.GetAttribute("PhysicsDamageDealtOffset");

            int magicOffset = 0;
            if (card.HasKeyword("Magic") || card.HasKeyword("Arcane") || card.HasKeyword("Sorcery"))
                magicOffset = user.GetAttribute("MagicDamageDealtOffset");

            elementalMultiplier = 1f;
            foreach (string element in elementalTags)
            {
                float targetGain = haveTarget ? target.GetRawAttribute(element + "DamageGainMultiplier", 1f) : 1f;
                elementalMultiplier *= user.GetRawAttribute(element + "DamageDealtMultiplier", 1f) * targetGain;
            }

            magicMultiplier = 1f;
            if (card.HasKeyword("Magic") || card.HasKeyword("Arcane") || card.HasKeyword("Sorcery"))
            {
                float targetGain = haveTarget ? target.GetRawAttribute("MagicDamageGainMultiplier", 1f) : 1f;
                magicMultiplier = user.GetRawAttribute("MagicDamageDealtMultiplier", 1f) * targetGain;
            }

            float targetFinalGain = haveTarget ? target.GetRawAttribute("FinalDamageGainMultiplier", 1f) : 1f;
            finalMultiplier = user.GetRawAttribute("FinalDamageDealtMultiplier", 1f) * targetFinalGain;

            baseDamageAfterOffset = card.attributeSubmodule.GetCurrentAttribute("Damage") + physicsOffset + magicOffset;
            float finalDamage = baseDamageAfterOffset * elementalMultiplier * magicMultiplier * finalMultiplier;

            return Mathf.RoundToInt(finalDamage);
        }
    }
    #endregion

    #region Buffs
    public partial class CardLogicBase
    {
        /// <summary>创建一个角色战斗 Buff 实例（通过 ModManager 类型注册）。</summary>
        public T CreateCharacterBuff<T>(params object[] parameters) where T : CharacterCombatBuffBase
        {
            string buffTypeID = ModManager.GetTypeID(typeof(T));
            if (string.IsNullOrEmpty(buffTypeID))
            {
                Debug.LogError($"Failed to get buff name for type {typeof(T).FullName}");
                return null;
            }
            return ModManager.CreateInstance<T>(buffTypeID, parameters);
        }

        public T CreateCharacterBuff<T>(string buffTypeID, params object[] parameters) where T : CharacterCombatBuffBase
        {
            if (string.IsNullOrEmpty(buffTypeID))
            {
                Debug.LogError($"Failed to get buff name for type {typeof(T).FullName}");
                return null;
            }
            return ModManager.CreateInstance<T>(buffTypeID, parameters);
        }

        /// <summary>创建一个卡牌战斗 Buff 实例（通过 ModManager 类型注册）。</summary>
        public T CreateCardBuff<T>(params object[] parameters) where T : CardBuffBase
        {
            string buffTypeID = ModManager.GetTypeID(typeof(T));
            if (string.IsNullOrEmpty(buffTypeID))
            {
                Debug.LogError($"Failed to get buff name for type {typeof(T).FullName}");
                return null;
            }
            return ModManager.CreateInstance<T>(buffTypeID, parameters);
        }

        public T CreateCardBuff<T>(string buffTypeID, params object[] parameters) where T : CardBuffBase
        {
            if (string.IsNullOrEmpty(buffTypeID))
            {
                Debug.LogError($"Failed to get buff name for type {typeof(T).FullName}");
                return null;
            }
            return ModManager.CreateInstance<T>(buffTypeID, parameters);
        }
    }
    #endregion

    public abstract partial class CardLogicBase
    {
        /// <summary>获取衍生卡牌数据（按索引）。</summary>
        public CardData GetDerivativeCardData(int index)
        {
            return ModManager.GetData<CardData>(cardData.derivativeCardDataRefs[index]);
        }

        /// <summary>获取衍生卡牌数据（按名称）。</summary>
        public CardData GetDerivativeCardData(string dataName)
        {
            if (cardData.derivativeCardDataRefs.Contains(dataName))
                return ModManager.GetData<CardData>(dataName);

            Debug.LogError($"Card {cardData.className} does not contain derivative card data '{dataName}'.");
            return null;
        }

        /// <summary>选中目标时触发的效果（在逻辑组件的 Targeting 之前执行）。</summary>
        public virtual void TargetingEffect(CharacterBase target) { }

        /// <summary>取消选中目标时触发的效果（在逻辑组件的 Untargeting 之前执行）。</summary>
        public virtual void UntargetingEffect() { }
    }

    /// <summary>卡牌逻辑组件基类。</summary>
    public abstract class CardLogicComponentBase
    {
        protected CardLogicBase mainLogic;
        protected CardInstance card => mainLogic.card;
        protected CharacterBase user => card.user;
        protected CombatTeam usingTeam => card.usingTeam;

        public virtual void Initialize(CardLogicBase card)
        {
            this.mainLogic = card;
            this.card.eventSubmodule.onTargeting += TargetingEffect;
            this.card.eventSubmodule.onUntargeting += UntargetingEffect;
        }

        protected virtual void TargetingEffect(CharacterBase target) { }

        protected virtual void UntargetingEffect() { }
    }
}