using System.Collections.Generic;
using System.Linq;
using GFGGame;

namespace GFGGame
{
    public class BagDataManager : SingletonBase<BagDataManager>
    {
        private Dictionary<int, ItemData> _bagDataDic = new Dictionary<int, ItemData>();//背包数据字典
        private List<ItemData> _bagDatas = new List<ItemData>();//背包数据列表
        public List<ItemData> BagDatas
        {
            get
            {
                return _bagDatas;
            }
        }
        public void Clear()
        {
            _bagDatas.Clear();
            _bagDataDic.Clear();
        }
        public void Add(ItemData itemData)
        {
            if (!_bagDataDic.ContainsKey(itemData.id))
            {
                _bagDataDic.Add(itemData.id, itemData);
            }
            else
            {
                _bagDataDic[itemData.id] = itemData;
            }
            SetBagDatas();
        }
        public void Remove(int itemId)
        {
            if (_bagDataDic.ContainsKey(itemId))
            {
                _bagDataDic.Remove(itemId);
                SetBagDatas();
            }
        }
        private void SetBagDatas()
        {
            _bagDatas = _bagDataDic.Values.ToList<ItemData>();
            _bagDatas.Sort((ItemData a, ItemData b) =>
            {
                if (a.subType > b.subType) return -1;
                if (a.subType < b.subType) return 1;

                if (a.rarity > b.rarity) return -1;
                if (a.rarity < b.rarity) return 1;

                return a.id - b.id;
            });
        }

        public int GetItemIndex(int itemId, int curSelectIndex)
        {
            if (_bagDataDic.Count == 0) return -1;//背包无数数据
            if (itemId < 0 || curSelectIndex < 0) return 0;//未选中物品，默认选中第一个
            if (!_bagDataDic.ContainsKey(itemId))//已选中物品但背包无数据
            {
                if (curSelectIndex < _bagDatas.Count)
                {
                    return curSelectIndex;
                }
                else
                {
                    return _bagDatas.Count - 1;
                }
            }
            else//已选中物品且背包有数据
            {
                for (int i = 0; i < _bagDatas.Count; i++)
                {
                    if (_bagDatas[i].id == itemId) return i;
                }
                return 0;
            }
        }

        public Dictionary<int, ItemData> GetBagData() 
        {
            return _bagDataDic;
        }
    }
}