using System;
using Configs;
using Data;
using Item;
using Managers;
using UnityEngine;
// 添加 System 命名空间以使用 Action

namespace Entity
{
    public class Character : LivingEntity
    {
        public override Attributes defAttributes
        {
            get
            {
                var def = base.defAttributes;
                var weaponDef = GetCurrentWeapon()?.Attributes;
                if (weaponDef != null)
                {
                    weaponDef.health = def.health;
                    weaponDef.moveSpeed = def.moveSpeed;
                    return weaponDef;
                }

                return def;
            }
        }


        private int _currentSelected; // 私有字段用于存储实际值

        /// <summary>
        ///     当前选中的背包槽位索引。
        ///     当此值被设置时，如果与旧值不同，将触发 OnCurrentSelectedChanged 事件。
        /// </summary>
        public int CurrentSelected
        {
            get => _currentSelected;
            set
            {
                var maxIndex = PlayerInventory != null && PlayerInventory.Capacity > 0 ? PlayerInventory.Capacity - 1 : 0;
                var clampedValue = Mathf.Clamp(value, 0, maxIndex);
                _currentSelected = clampedValue;
                InitWeaponAnimator();
            }
        }

        public Inventory PlayerInventory { get; private set; }
        public InventorySlot Coin{get;private set;}

        public override void Init(EntityDef entityDefine)
        {
            PlayerInventory = new Inventory(this, 3);
            var coinItem = ItemResourceManager.Instance.GetItem(ConfigManager.Instance.GetValue<string>("CoinItem"));
            if(!KeyValueArchiveManager.Instance.HasKey("coinCount"))
            {
                KeyValueArchiveManager.Instance.Set("coinCount", 0);
            }

            Coin = Program.Instance.OutsidePlayDimension == null
                ? new InventorySlot(coinItem, Program.Instance.CoinCount)
                : new InventorySlot(coinItem, 0);

            PlayerInventory.OnInventoryChanged += InventoryChange;
            CurrentSelected = 0;
            base.Init(entityDefine);
        }
        

        /// <summary>
        ///     尝试将指定物品添加到角色的背包中。
        /// </summary>
        /// <param name="itemResource">要尝试添加的物品资源。</param>
        /// <param name="quantity">要尝试添加的数量。</param>
        /// <returns>
        ///     未成功添加到背包的物品数量。
        ///     如果返回0，表示所有物品都成功添加；
        ///     如果返回quantity，表示未能添加任何物品；
        ///     如果返回一个介于0和quantity之间的值，表示部分物品被添加。
        /// </returns>
        public int TryPickupItem(ItemResource itemResource, int quantity)
        {
            if (PlayerInventory == null)
            {
                Debug.LogError($"Character '{name}' inventory is not initialized. Cannot pickup item.");
                return quantity; // 如果背包未初始化，则视为未能添加任何物品
            }
            

            var remainingQuantity = PlayerInventory.AddItem(itemResource, quantity);

            return remainingQuantity;
        }

        public override WeaponResource GetCurrentWeapon()
        {
            var currentSelectItem = PlayerInventory.GetSlot(CurrentSelected);
            return currentSelectItem?.Item as WeaponResource;
        }

        private void InventoryChange()
        {
            InitWeaponAnimator();
        }
    }
}