using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using BITKit;
using BITKit.Entities;
using static UnityEditor.Progress;
using Google.Apis.Sheets.v4.Data;

namespace BITFALL
{
    public interface IPlayerEquipCallback
    {
        void OnEquip(IEquipmentSlot slot,IBasicItem item);
        void DeEquip(IEquipmentSlot slot, IBasicItem item);
    }
    public interface IPlayerEquipContainer {
        bool TryDeEquip(IEquipmentSlot slot);
    }
    /// <summary>
    /// 玩家装备容器
    /// 支持，护甲，头盔和背包等
    /// </summary>
    public class PlayerEquipContainer : EntityComponent, IExcutor<IBasicItem>, IPlayerEquipContainer
    {
        Dictionary<IEquipmentSlot, IBasicItem> dictionary = new();
        IBasicItemContainer inventory;
        public override void Initialize(IEntity entity)
        {
            base.Initialize(entity);
            entity.Set<IPlayerEquipContainer>(this);
            entity.RegisterCallback<IExcutor<IBasicItem>>(this);
        }
        public override void OnStart()
        {
            base.OnStart();
            inventory = entity.Get<IBasicItemContainer>();
        }
        public bool TryDeEquip(IEquipmentSlot slot)
        {
            if (dictionary.TryGetValue(slot, out var equipable))
            {
                if (inventory.Add(equipable))
                {
                    DeEquip(slot, equipable);
                }
            }
            return false;
        }
        bool Equip(IEquipmentSlot slot, IBasicItem item)
        {
            dictionary.Add(slot, item);
            foreach (var x in entity.GetCallbacks<IPlayerEquipCallback>())
            {
                x.OnEquip(slot, item);
            }
            return true;
        }
        bool DeEquip(IEquipmentSlot slot, IBasicItem item)
        {
            dictionary.Remove(slot);
            foreach (var x in entity.GetCallbacks<IPlayerEquipCallback>())
            {
                x.DeEquip(slot, item);
            }
            return true;
        }

        public bool TryExcute(IBasicItem value)
        {
            var asset = value.GetAssetable();
            ///尝试获取可装备信息
            if (asset.TryGetProperty<EquipmentAsSlot>(out var equipable))
            {
                ///已装备物品
                if (dictionary.TryGetValue(equipable.slot, out var equipedItem))
                {
                    ///尝试将装配放回背包
                    if (inventory.Add(equipedItem))
                    {
                        ///移除已装备物品
                        DeEquip(equipable.slot, value);
                    }
                }
                ///从库存中移除物品
                if (inventory.Remove(value))
                {
                    ///装配物品
                    Equip(equipable.slot, value);
                }
            }
            return false;
        }
    }
}