using System.Collections.Generic;
using System.Linq;
using Cielonos.MainGame.Characters;
using Cielonos.MainGame.Inventory;
using SLSFramework.General;
using UnityEngine;

namespace Cielonos.MainGame
{
    public abstract partial class CharacterBuffBase : BuffBase<CharacterBase>
    {
        public CharacterBase attachedCharacter;
        public CharacterBase sourceCharacter;
        public ItemBase sourceItem;
        /// <summary>
        /// 图标子模块
        /// </summary>
        public IconSubmodule iconSubmodule;
        /// <summary>
        /// 事件子模块
        /// </summary>
        public EventSubmodule eventSubmodule;
        /// <summary>
        /// 回合计数，每回合开始时计数-1。
        /// </summary>
        public CountSubmodule roundCountSubmodule;
        /// <summary>
        /// 时间模块
        /// </summary>
        public TimeSubmodule timeSubmodule;
        
        public UnitedStackSubmodule unitedStackSubmodule;
        public IndependentStackSubmodule independentStackSubmodule;
        public AttributeSubmodule attributeSubmodule;
        public StatusSubmodule statusSubmodule;
    }

    public partial class CharacterBuffBase
    {
        public sealed override bool OnBuffApply(out BuffBase<CharacterBase> existingBuff)
        {
            throw new System.NotImplementedException("请使用类型约束更强的OnBuffApply方法");
        }

        public abstract bool OnBuffApply(out CharacterBuffBase existingBuff);
        public override void OnAfterFirstApply()
        {
            statusSubmodule?.AddStatus();
            attachedCharacter.buffSm.buffList.Exclude(this).For(buff => buff.eventSubmodule?.onOtherBuffFirstApplied.Invoke(this));
        }

        protected float DeltaTime => attachedCharacter.selfTimeSm.DeltaTime;
        
        public override void OnBuffUpdate()
        {
            timeSubmodule?.Update(DeltaTime);
            independentStackSubmodule?.Update(DeltaTime);
        }

        public override void OnBuffRemove()
        {
            attributeSubmodule?.RefreshAllModifiedAttributes();
            statusSubmodule?.RemoveStatus();
            iconSubmodule?.Remove();
        }
    }

    public partial class CharacterBuffBase
    {
        protected bool FindExistingSameBuff<T>(out T existingBuff) where T : CharacterBuffBase
        {
            return FindExistingSameBuff(out existingBuff, attachedCharacter.buffSm.buffList);
        }
        
        public override void Apply(CharacterBase attachedCharacter)
        {
            this.Apply(attachedCharacter, null, null);
        }

        public void Apply(CharacterBase attachedCharacter, CharacterBase sourceCharacter = null, ItemBase sourceItem = null)
        {
            this.attachedCharacter = attachedCharacter;
            this.sourceCharacter = sourceCharacter;
            this.sourceItem = sourceItem;

            if (OnBuffApply(out CharacterBuffBase existingBuff))
            {
                this.attachedCharacter.buffSm.buffList.AddByPriority(this);

                OnAfterFirstApply();

                if (iconSubmodule != null)
                {
                    
                }
            }
            else
            {
                existingBuff.iconSubmodule?.Update();
            }
            
            attachedCharacter.buffSm.buffList.Exclude(this).For(buff => buff.eventSubmodule?.onOtherBuffApplied.Invoke(this));
            attributeSubmodule?.RefreshAllModifiedAttributes();
            iconSubmodule?.Update();
        }

        public override void Remove()
        {
            OnBuffRemove();
            this.attachedCharacter.buffSm.buffList.Remove(this);
            attachedCharacter.buffSm.buffList.Exclude(this).For(buff => buff.eventSubmodule?.onOtherBuffRemoved.Invoke(this));
        }

        public override void UntriggerRemove()
        {
            this.attachedCharacter.buffSm.buffList.Remove(this);
        }
    }
    
    public partial class CharacterBuffBase
    {
        public abstract class CharacterBuffSubmodule : BuffSubmodule
        {
            public CharacterBase character => (buff as CharacterBuffBase)?.attachedCharacter;

            protected CharacterBuffSubmodule(CharacterBuffBase buff) : base(buff)
            {
                
            }
        }
        
        /// <summary>
        /// Buff的角色状态调整模块
        /// </summary>
        public class StatusSubmodule : CharacterBuffSubmodule
        {
            public List<StatusType> statusList;

            public StatusSubmodule(CharacterBuffBase buff, params StatusType[] statusTypes) : base(buff)
            { 
                statusList = statusTypes.ToList();
            }

            /// <summary>
            /// 将Buff内含的状态添加到角色身上（1层）
            /// </summary>
            public void AddStatus()
            {
                statusList.ForEach(status => character.statusSm.AddStatus(status));
            }

            /// <summary>
            /// 将Buff内含的状态从角色身上移除（1层），注意，如果某个状态有其它的来源，这个状态的效果仍然存在。
            /// </summary>
            public void RemoveStatus()
            {
                statusList.ForEach(status => character.statusSm.RemoveStatus(status));
            }
        }
        
        /// <summary>
        /// Buff的角色通常属性调整模块
        /// </summary>
        public class AttributeSubmodule : CharacterBuffSubmodule
        {
            public Dictionary<string, float> numericChange;
            public Dictionary<string, float> percentageChangeOfAccumulation;
            public Dictionary<string, float> percentageChangeOfMultiplication;

            public AttributeSubmodule(CharacterBuffBase buff) : base(buff)
            {
                this.numericChange = new Dictionary<string, float>();
                this.percentageChangeOfAccumulation = new Dictionary<string, float>();
                this.percentageChangeOfMultiplication = new Dictionary<string, float>();
            }

            public List<string> RefreshAllModifiedAttributes()
            {
                List<string> modifiedAttributes = new List<string>();
                modifiedAttributes.AddRange(numericChange.Select(kvp => kvp.Key));
                modifiedAttributes.AddRange(percentageChangeOfAccumulation.Select(kvp => kvp.Key));
                modifiedAttributes.AddRange(percentageChangeOfMultiplication.Select(kvp => kvp.Key));
                
                modifiedAttributes.ForEach(attr => character.attributeSm.RefreshAttribute(attr));
                
                return modifiedAttributes;
            }
        }
    }
}