using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.U2D;

namespace DDD
{
    public class DataManager : Singleton<DataManager>, IManager
    {
        private readonly Dictionary<Type, ScriptableObject> _dataSoTable = new();
        private Dictionary<string, Sprite> _spriteAtlas;
        
        private const string SoLabel = "GoogleSheetSo";

        public void PreInit()
        {
            
        }

        public async Task Init()
        {
            await LoadAllGameDataSo();
            await LoadSpriteAtlas();
        }

        public void PostInit()
        {

        }
        
        private async Task LoadAllGameDataSo()
        {
            var soList = await AssetManager.LoadAssetsByLabel<ScriptableObject>(SoLabel);
        
            foreach (var so in soList)
            {
                var type = so.GetType();
                _dataSoTable.TryAdd(type, so);
            }

            Debug.Log($"[DataManager] {_dataSoTable.Count}개의 SO가 로드되었습니다.");
        }

        private async Task LoadSpriteAtlas()
        {
            List<SpriteAtlas> spriteAtlases = await AssetManager.LoadAssetsByLabel<SpriteAtlas>(DataConstants.AtlasLabel);
            _spriteAtlas = new Dictionary<string, Sprite>(spriteAtlases.Count);

            foreach (var atlas in spriteAtlases)
            {
                if (atlas == null) continue;
                    
                var count = atlas.spriteCount;
                if (count == 0) continue;
                    
                var sprites = new Sprite[count];
                atlas.GetSprites(sprites);

                foreach (var sprite in sprites)
                {
                    if (sprite == null) continue;

                    var key = sprite.name.Replace(CommonConstants.Clone, string.Empty).Trim();
                    _spriteAtlas.TryAdd(key, sprite);
                }
            }
        }

        public T GetDataSo<T>() where T : ScriptableObject
        {
            if (_dataSoTable.TryGetValue(typeof(T), out var so))
            {
                return so as T;
            }

            Debug.LogError($"[DataManager] {typeof(T).Name} SO를 찾을 수 없습니다.");
            return null;
        }
        
        public Sprite GetSprite(string key) => _spriteAtlas.GetValueOrDefault(key);

        // TODO : So가 늘어나는 경우 관리 방법 변경 필요성이 있음
        // GetItemType(id)
        // GetItemImage
        // GetItemName
    }
}