using asap.core;
using PlayFab;
using PlayFab.ClientModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using UnityEngine;

public class PlayFabMgr : MonoBehaviour
{
    const int USER_DATA_UPDATE_INTERVAL = 40;
    const int Buffer_Count = 5;
    const string Last_Update_Time_Key_Prefix = "LastUpdateTime";
    const string Local_Data_Key_prefix = "LocalData";
    private string Last_Update_Time_Key;
    private string Local_Data_Key;

    private LinkedList<Dictionary<string, string>> dataBuffer;
    private Dictionary<string, string> swapData;
    private Dictionary<string, long> lastUpdateTime;
    private Dictionary<string, string> localData;

    private CancellationTokenSource tokenSource;

    static PlayFabMgr _instance = null;

    public static PlayFabMgr Instance
    {
        get
        {
            if (_instance == null)
            {
                GameDebug.LogError("PlayFabMgr Instance doesn't exist yet!");
            }

            return _instance;
        }
    }

    public Dictionary<string, string> CompareDatas(Dictionary<string, UserDataRecord> remoteDatas, string userId)
    {
        Last_Update_Time_Key = $"{Last_Update_Time_Key_Prefix}_{userId}";
        Local_Data_Key = $"{Local_Data_Key_prefix}_{userId}";
        var lastUpdateTimeStr = PlayerPrefs.GetString(Last_Update_Time_Key, string.Empty);
        var now = ZZTimeHelper.UtcNow().Ticks;
        localData = new Dictionary<string, string>();
        lastUpdateTime = new Dictionary<string, long>();

        if (string.IsNullOrEmpty(lastUpdateTimeStr))
        {
            if (remoteDatas != null && remoteDatas.Count > 0)
            {
                lastUpdateTime = remoteDatas.ToDictionary(x => x.Key, x => x.Value.LastUpdated.Ticks);
                localData = remoteDatas.ToDictionary(x => x.Key, x => x.Value.Value);
            }
        }
        else
        {
            var tempLastUpdateTime = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, long>>(lastUpdateTimeStr);
            var localDataStr = PlayerPrefs.GetString(Local_Data_Key);
            var tempLocalData = Newtonsoft.Json.JsonConvert.DeserializeObject<Dictionary<string, string>>(localDataStr);
            var allKeys = tempLocalData.Keys.Concat(remoteDatas.Keys).Distinct();
            foreach (var key in allKeys)
            {
                var localValue = tempLocalData.ContainsKey(key) ? tempLocalData[key] : null;
                var remoteValue = remoteDatas.ContainsKey(key) ? remoteDatas[key].Value : null;
                var localTime = tempLastUpdateTime.ContainsKey(key) ? tempLastUpdateTime[key] : 0;
                var remoteTime = remoteDatas.ContainsKey(key) ? remoteDatas[key].LastUpdated.Ticks : 0;

                if (localValue == null)
                {
                    localData[key] = remoteValue;
                    lastUpdateTime[key] = remoteTime;
                    continue;
                }

                if (remoteValue == null)
                {
                    UpdateUserDataValue(key, localValue);
                    lastUpdateTime[key] = now;
                    localData[key] = localValue;
                    continue;
                }

                var timeDelta = localTime - remoteTime;
                if (Math.Abs(timeDelta) > TimeSpan.TicksPerSecond * 60)
                {
                    if (localTime > remoteTime)
                    {
                        UpdateUserDataValue(key, localValue);
                        lastUpdateTime[key] = now;
                        localData[key] = localValue;
                    }
                    else
                    {
                        lastUpdateTime[key] = remoteTime;
                        localData[key] = remoteValue;
                    }
                }
                else
                {
                    lastUpdateTime[key] = localTime;
                    localData[key] = localValue;
                }
            }
        }

        PlayerPrefs.SetString(Last_Update_Time_Key, LitJson.JsonMapper.ToJson(lastUpdateTime));
        PlayerPrefs.SetString(Local_Data_Key, LitJson.JsonMapper.ToJson(localData));
        return localData;
    }

    void Awake()
    {
        _instance = this;
        InitBuffer();
        tokenSource = new CancellationTokenSource();
        UpdateUserDataValue(tokenSource.Token);
    }

    void InitBuffer()
    {
        dataBuffer = new LinkedList<Dictionary<string, string>>();
        for (int i = 0; i < Buffer_Count; i++)
        {
            dataBuffer.AddLast(new Dictionary<string, string>());
        }
        swapData = new Dictionary<string, string>();
    }

    void OnApplicationPause(bool is_pause)
    {
        if (is_pause)
        {
            tokenSource.Cancel();
            tokenSource = null;
            SyncData();
        }
        else
        {
            tokenSource = new CancellationTokenSource();
            UpdateUserDataValue(tokenSource.Token);
        }
    }

    void OnApplicationQuit()
    {
        tokenSource.Cancel();
        tokenSource = null;
        SyncData();
    }

    void OnDestroy()
    {
        tokenSource?.Cancel();
        tokenSource = null;
        SyncData();
    }

    private async void UpdateUserDataValue(CancellationToken token)
    {
        try
        {
            while (!token.IsCancellationRequested)
            {
                SyncData();
                await Task.Delay(USER_DATA_UPDATE_INTERVAL * 1000);
            }
        }
        catch (System.Exception) { }
    }

    public void UpdateUserDataValue(string key, string data, bool remoteStore = true)
    {
        if (remoteStore)
        {
            var cbuff = dataBuffer.First;
            while (cbuff != null)
            {
                var datas = cbuff.Value;
                if (!datas.ContainsKey(key) && datas.Count >= 10)
                {
                    cbuff = cbuff.Next;
                    continue;
                }
                cbuff.Value[key] = data;
                break;
            }
        }

        localData[key] = data;
        lastUpdateTime[key] = ZZTimeHelper.UtcNow().Ticks;
        //Debug.Log($"[PlayFabMgr]UpdateUserDataValue key:{key} data:{data}");
        PlayerPrefs.SetString(Last_Update_Time_Key, LitJson.JsonMapper.ToJson(lastUpdateTime));
        PlayerPrefs.SetString(Local_Data_Key, LitJson.JsonMapper.ToJson(localData));
    }
    /// <summary>
    /// 没有数据返回 null 一定一定一定判空！！！
    /// </summary>
    /// <param name="key"></param>
    /// <returns></returns>
    public string GetLocalData(string key)
    {
        if (localData.ContainsKey(key))
        {
            return localData[key];
        }
        else
        {
            return null;
        }
    }

    private void SyncData()
    {
        var buf = dataBuffer.First;
        if (buf.Value.Count == 0)
            return;

        var datas = buf.Value;
        swapData.Clear();
        buf.Value = swapData;
        swapData = datas;

        dataBuffer.RemoveFirst();
        dataBuffer.AddLast(buf);

        var request = new UpdateUserDataRequest()
        {
            Data = swapData,
            Permission = UserDataPermission.Public
        };

        PlayFabClientAPI.UpdateUserData(request, null, UpdateFaild);
#if UNITY_EDITOR
        //IConfig config = GContext.container.Resolve<IConfig>();
        //if (config != null && config.Get<string>("DBUG", string.Empty) == "1")
        //{
        try
        {
            //写入本地文件记录 key 和时间
            string persistentPath = Application.persistentDataPath;
            // 拼接文件名，这里使用txt文件记录数据
            string filePath = System.IO.Path.Combine(persistentPath, "syncData.csv");
            string currentTime = ZZTimeHelper.UtcNow().ToString("yyyy-MM-dd HH:mm:ss");
            string dataLine = $"{currentTime},{string.Join(',', swapData.Keys)}";
            // 使用追加模式写入文件，每次写入一行数据
            using (System.IO.StreamWriter writer = System.IO.File.AppendText(filePath))
            {
                writer.WriteLine(dataLine);
            }
        }
        catch (Exception e)
        {
            Debug.LogError($"记录数据时出错: {e.Message}");
        }
        //}
#endif
    }

    private void UpdateFaild(PlayFabError error)
    {
        GameDebug.LogError("[PlayFabMgr]UpdateUserData Error: {0}", error.ToString());
    }

    public async Task<bool> SyncDataImmidiate(string key, string data)
    {
        foreach (var buff in dataBuffer)
        {
            if (buff.ContainsKey(key))
            {
                buff.Remove(key);
            }
        }

        var taskSource = new TaskCompletionSource<bool>();

        var request = new UpdateUserDataRequest()
        {
            Data = new Dictionary<string, string>() { { key, data } },
            Permission = UserDataPermission.Public
        };

        PlayFabClientAPI.UpdateUserData(request,
            (r) => { taskSource.SetResult(true); },
            (e) =>
            {
                taskSource.SetResult(false);
                UnityEngine.Debug.LogError($"[PlayFabMgr]UpdateUserData Error: {e.ToString()}");
            }
        );
        return await taskSource.Task;
    }
}