using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using Cysharp.Threading.Tasks;
using UnityEngine;
using Steamworks;
using Steamworks.Data;

namespace BITKit.Steamwork
{
    public class SteamService : MonoBehaviour,ISteamService
    {
        internal static SteamService Singleton;
        [Header(Constant.Header.Settings)] 
        [SerializeField]private uint appId=480;

        [Header(Constant.Header.Settings)]
        [SerializeField] private TextAsset allowCharacters;
        
        [Header(Constant.Header.Settings)]
        [SerializeField] private Optional<UnityInventoryItemDef[]> overrideInventoryItemDefs;
        
        //接口实现
        public ulong SteamId => SteamClient.SteamId;
        public string Name =>SteamClient.IsValid ? SteamClient.Name.Where(x=>allowCharacters.text.Contains(x)).Aggregate("",(current, c) => current+c) : Environment.UserDomainName;
        public bool IsInitialized=>SteamClient.IsValid&&SteamClient.IsLoggedOn;
        public async UniTask<Texture2D> GetAvatarAsync(CancellationToken token)
        {
            var avatar =await SteamFriends.GetLargeAvatarAsync(SteamClient.SteamId);
            var texture = new Texture2D(0, 0);
            return avatar.Value.Covert();
        }

        public async UniTask<ISteamInventoryItemDef[]> GetInventoryItemDefsAsync(CancellationToken token)
        {
            if(overrideInventoryItemDefs.Allow)return overrideInventoryItemDefs.Value;
            var items = await SteamInventory.GetAllItemsAsync();
            if(items.HasValue is false)return Array.Empty<ISteamInventoryItemDef>();
            return items.Value.GetItems().Select(x => new SteamInventoryItemDef()
            {
                Id = x.Id,
                DefId = x.DefId
            }).Cast<ISteamInventoryItemDef>().ToArray();
        }

        public int Id => (int)SteamClient.SteamId.AccountId;

        private bool initialized;

        private void Awake()
        {
            Singleton = this;
        }

        private void Start()
        {
            try
            {
                if (SteamClient.IsValid is false)
                {
                    SteamClient.Init(appId);
                }
                initialized = true;
                BIT4Log.Log<SteamService>("已初始化Steam");
            }
            catch (Exception e)
            {
                BIT4Log.Warning<SteamService>("Steam初始化失败，请验证客户端是否运行");
                Debug.Log(e);
            }
        }

        private void OnDestroy()
        {
            if (initialized)
                SteamClient.Shutdown();
        }
     
    }
    [Serializable]
    public class SteamServiceSingleton:ISteamService
    {
        private ISteamService _steamServiceImplementation=>SteamService.Singleton;
        public int Id => _steamServiceImplementation.Id;
        public ulong SteamId => _steamServiceImplementation.SteamId;
        public string Name => _steamServiceImplementation.Name;
        public bool IsInitialized=>_steamServiceImplementation.IsInitialized;
        public UniTask<Texture2D> GetAvatarAsync(CancellationToken token)=>_steamServiceImplementation.GetAvatarAsync(token);
        public UniTask<ISteamInventoryItemDef[]> GetInventoryItemDefsAsync(CancellationToken token)=>_steamServiceImplementation.GetInventoryItemDefsAsync(token);
    }
}