using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using asap.core;
using game;
using GameCore;
using Newtonsoft.Json;
using UniRx;

public class FetchMailRequest
{
    public DateTime? lastSyncTime;
}

public class FetchMailResp
{
    public bool success;
    public List<GameMail> mails;
    public string error;
}

public class MailStateInfo
{
    public string Id { get; set; }
    public EMailState state { get; set; }

    public MailStateInfo(GameMail mail, EMailState newState)
    {
        Id = mail.Id.ToString();
        state = mail.State | newState;
    }
}

public class UpdateMailStateRequest
{
    public MailStateInfo[] mailStates;
}

public class UpdateMailStateResp
{
    public bool success;
    public MailStateInfo[] states;
}

public class FetchMailEvt
{
    DateTime TimeStamp;
}

public class MailInfo
{
    public string Id { get; set; }

    public EMailType Type { get; set; }

    public int expireDays { get; set; }

    public string Title { get; set; }

    public string From { get; set; }

    public string Content { get; set; }

    public int[] DropIds { get; set; }
}

public class SendMailRequest
{
    public MailInfo[] mailInfos;
}

public class SendMailResp
{
    public bool success;
    public List<GameMail> mails;
    public string error;
}

public class AutoMailData
{
    public string Id;
    public int levelMin;
    public int levelMax;
    public DateTime accountCreateTime;
    public DateTime loginTimeMin;
    public DateTime loginTimeMax;
    public int expireDays;
    public int DropID;

    public AutoMailData(cfg.AutoDeliveryMail mail)
    {
        Id = mail.MailID.ToString();
        levelMin = mail.AccountLevelRange[0];
        levelMax = mail.AccountLevelRange[1] == -1 ? int.MaxValue : mail.AccountLevelRange[1];
        accountCreateTime = DateTime.Parse(mail.AccountCreateTimestamp);
        loginTimeMin = DateTime.Parse(mail.LoginTimestampRange[0]);
        loginTimeMax = DateTime.Parse(mail.LoginTimestampRange[1]);
        DropID = mail.DropID;
        expireDays = mail.ExpireDay;
    }

    public bool IsSatisfy(DateTime loginTime, DateTime CreateTime, int level)
    {
        return loginTime >= loginTimeMin && loginTime <= loginTimeMax
               && CreateTime < accountCreateTime
               && level >= levelMin && level <= levelMax;
    }

    public MailInfo ToMailInfo()
    {
        return new MailInfo
        {
            Id = Id.ToString(),
            Type = EMailType.AutoDelivery,
            DropIds = new[] { DropID },
            expireDays = expireDays
        };
    }
}

public static class MailUrls
{
    public const string Fetch = "mail/fetch";
    public const string UpdateState = "mail/updateState";
    public const string Send = "mail/send";
}

public class InGameMailService : IInGameMailService
{
    private MailCache _mailCache;
    private IMailHandler _handler;
    private List<AutoMailData> _autoMailDatas;

    private CompositeDisposable _disposables;

    private bool _forceFetch = false;

    //private const int Fetch_Interval = 3;

    public bool IsUnlock { get; set; }


    public InGameMailService(cfg.Tables tables)
    {
        this._mailCache = new MailCache(tables.TbAutoDeliveryMail);
        this._handler = new BaseMailHandler(_mailCache);
        _autoMailDatas = tables.TbAutoDeliveryMail.DataList
            .Select(x => new AutoMailData(x)).ToList();
    }

    public void Init()
    {
        var userService = GContext.container.Resolve<IUserService>();
        _mailCache.Load(userService.UserId);

        _disposables = new CompositeDisposable();

        var minActiveLevel = _autoMailDatas.Min(x => x.levelMin) - 1;

        if (userService.IsAuthorized)
            _handler.FetchMail();
        else
            GContext.OnEvent<game.EvtAPISvrLoginSuccess>().Subscribe(_ => _handler.FetchMail()).AddTo(_disposables);

        GContext.OnEvent<OnLvChangeEvent>()
            .Skip(1)
            .Where(x => x.lvl >= minActiveLevel)
            .Subscribe(OnLevelChange)
            .AddTo(_disposables);

        //GContext.OnEvent<RestartShowHomeUIEvent>()
        //.Skip(1)
        //.Subscribe(OnHomeUIShow)
        //.AddTo(_disposables);


    }

    public void Reset()
    {
        _mailCache?.Unload();
        _disposables?.Dispose();
        _disposables = null;
    }

    public async Task FetchMail()
    {
        await _handler.FetchMail();
    }

    public IList<GameMail> GetAllMail()
    {
        return _mailCache.GetAll();
    }

    public async Task<bool> MarkRead(GameMail mail)
    {
        return await _handler.MarkAsRead(mail);
    }

    public async Task<bool> MarkRead(GameMail[] mails = null)
    {
        return await _handler.MarkAsRead(mails);
    }

    public async Task<bool> DelMail(GameMail mail)
    {
        return await _handler.DeleteMail(mail);
    }

    public async Task<bool> DelMail(GameMail[] mails = null)
    {
        return await _handler.DeleteMail(mails);
    }

    public async Task<bool> TakeReward(GameMail mail)
    {
        return await _handler.TakeReward(mail);
    }

    public async Task<bool> TakeReward(GameMail[] mails)
    {
        return await _handler.TakeReward(mails);
    }

    private void OnLevelChange(OnLvChangeEvent evt)
    {
#if UNITY_EDITOR
        UnityEngine.Debug.Log("[InGameMailService] OnLevelChange");
#endif
        GenAutoDeliveryMail();
    }

    //private async void OnHomeUIShow(RestartShowHomeUIEvent evt)
    //{

    //#if UNITY_EDITOR
    //var deltaTime = _mailCache.LastSyncTime == null ? 0 : (ZZTimeHelper.UtcNow() - _mailCache.LastSyncTime.Value).TotalSeconds;
    //UnityEngine.Debug.Log($"[InGameMailService] OnHomeUIShow deltaTime {deltaTime}");
    //#endif
    //if(_mailCache.LastSyncTime == null 
    //|| _forceFetch
    //|| ZZTimeHelper.UtcNow() - _mailCache.LastSyncTime.Value > TimeSpan.FromMinutes(Fetch_Interval))
    //{
    //if(await _handler.FetchMail())
    //{
    //_forceFetch = false;
    //}
    //}
    //}

    private async void GenAutoDeliveryMail()
    {
        var playerData = GContext.container.Resolve<PlayerData>();
        var userData = GContext.container.Resolve<IUserService>();

        var mailsToSend = _autoMailDatas.Where(m => !_mailCache.HasMail(m.Id)
                && m.IsSatisfy(userData.LoginTime, userData.CreateTime, playerData.lv))
            .Select(m => m.ToMailInfo())
            .ToArray();

        if (mailsToSend.Length > 0)
        {
            if (await _handler.SendMail(mailsToSend))
            {
                _forceFetch = true;
            }
        }

#if UNITY_EDITOR
        var mailids = mailsToSend.Select(m => m.Id);
        var mailidsStr = string.Join(',', mailids);
        UnityEngine.Debug.Log($"[InGameMailService] GenAutoDeliveryMail {mailidsStr}");
#endif
    }

    public void PrintCacheMail()
    {
        UnityEngine.Debug.Log(_mailCache.PrintCacheMails());
    }
}

public class BaseMailHandler : IMailHandler
{
    protected MailCache _cache;

    public BaseMailHandler(MailCache cache)
    {
        this._cache = cache;
    }

    public virtual async Task<bool> FetchMail()
    {
        try
        {
            await Awaiters.NextFrame;
#if UNITY_EDITOR
            UnityEngine.Debug.Log($"[InGameMailService] Start Fetch Mails");
#endif
            var req = new FetchMailRequest()
            {
                lastSyncTime = _cache.LastSyncTime
            };

            // [REMOVED] CustomServerMgr deleted
            return false;
        }
        catch (Exception e)
        {
            UnityEngine.Debug.LogException(e);
        }

        UnityEngine.Debug.LogWarning("[InGameMailService] FetchMail Failed");
        return false;
    }

    public async Task<bool> SendMail(MailInfo[] mailInfos)
    {
        try
        {
            var req = new SendMailRequest()
            {
                mailInfos = mailInfos
            };

            // [REMOVED] CustomServerMgr deleted
            return false;
        }
        catch (Exception e)
        {
            UnityEngine.Debug.LogError(e);
        }

        return false;
    }

    protected virtual async Task<bool> UpdateMailState(GameMail[] mails, EMailState state)
    {
        var req = new UpdateMailStateRequest()
        {
            mailStates = mails.Select(m => new MailStateInfo(m, state)).ToArray()
        };

        // [REMOVED] CustomServerMgr deleted
        return false;
    }


    public virtual async Task<bool> MarkAsRead(GameMail mail)
    {
        if (mail.IsRead) return false;

        var result = await UpdateMailState(new[] { mail }, EMailState.HasRead);
        if (result) _cache.Save();
        return result;
    }

    public virtual async Task<bool> MarkAsRead(GameMail[] mails = null)
    {
        if (mails == null)
        {
            mails = _cache.GetAll()
                .Where(m => !m.IsRead)
                .ToArray();
        }
        return await UpdateMailState(mails, EMailState.HasRead);
    }

    public async Task<bool> TakeReward(GameMail mail)
    {
        if (!mail.HasDrops || mail.HasReward)
            return false;

        var result = await UpdateMailState(new[] { mail }, EMailState.RewardTaken);
        if (result)
        {
            _cache.Save();
            if (mail.Type == EMailType.Personal)
            {
                GContext.container.Resolve<PlayerItemData>().AddItemByDropListLureInflation(null, mail.DropIds.ToList(), null);
            }
            else
            {
                GContext.container.Resolve<PlayerItemData>().AddItemByDropList(mail.DropIds.ToList(), null);
            }
            GContext.Publish(new ShowData());
        }
        return result;
    }

    public async Task<bool> TakeReward(GameMail[] mails = null)
    {
        if (mails == null)
        {
            mails = _cache.GetAll()
                .Where(m => m.HasDrops && !m.HasReward)
                .ToArray();
        }
        else
        {
            mails = mails.Where(m => m.HasDrops && !m.HasReward)
                .ToArray();
        }

        if (mails.Length == 0) return false;

        var result = await UpdateMailState(mails, EMailState.HasRead);
        if (result)
        {
            _cache.Save();
            var drops = mails.Where(m => m.HasReward)
                .SelectMany(m => m.DropIds).ToList();
            GContext.container.Resolve<PlayerItemData>().AddItemByDropList(drops, null);
            GContext.Publish(new ShowData());
        }

        return result;
    }

    public async Task<bool> DeleteMail(GameMail mail)
    {
        if (mail.IsDeleted)
            return false;

        var result = await UpdateMailState(new[] { mail }, EMailState.HasDeleted);
        if (result) _cache.Save();
        return result;
    }

    public async Task<bool> DeleteMail(GameMail[] mails = null)
    {
        if (mails == null)
        {
            mails = _cache.GetAll()
                .Where(m => m.IsRead && m.HasReward)
                .ToArray();
        }
        else
        {
            mails = mails.Where(m => !m.IsDeleted)
                .ToArray();
        }

        if (mails.Length == 0) return false;

        var result = await UpdateMailState(mails, EMailState.HasDeleted);
        if (result) _cache.Save();
        return result;

    }

}