#nullable disable
using LinqToDB;
using LinqToDB.EntityFrameworkCore;
using EllieBot.Db;
using EllieBot.Db.Models;
using EllieBot.Modules.Gambling.Bank;
using EllieBot.Modules.Gambling.Common;
using EllieBot.Modules.Gambling.Services;
using EllieBot.Modules.Utility.Services;
using EllieBot.Services.Currency;
using System.Collections.Immutable;
using System.Globalization;
using System.Text;
using EllieBot.Modules.Gambling.Rps;
using EllieBot.Common.TypeReaders;
using EllieBot.Modules.Patronage;

namespace EllieBot.Modules.Gambling;

public partial class Gambling : GamblingModule<GamblingService>
{
    private readonly IGamblingService _gs;
    private readonly DbService _db;
    private readonly ICurrencyService _cs;
    private readonly DiscordSocketClient _client;
    private readonly NumberFormatInfo _enUsCulture;
    private readonly DownloadTracker _tracker;
    private readonly GamblingConfigService _configService;
    private readonly IBankService _bank;
    private readonly IPatronageService _ps;
    private readonly IRemindService _remind;
    private readonly GamblingTxTracker _gamblingTxTracker;

    private IUserMessage rdMsg;

    public Gambling(
        IGamblingService gs,
        DbService db,
        ICurrencyService currency,
        DiscordSocketClient client,
        DownloadTracker tracker,
        GamblingConfigService configService,
        IBankService bank,
        IPatronageService ps,
        IRemindService remind,
        GamblingTxTracker gamblingTxTracker)
        : base(configService)
    {
        _gs = gs;
        _db = db;
        _cs = currency;
        _client = client;
        _bank = bank;
        _ps = ps;
        _remind = remind;
        _gamblingTxTracker = gamblingTxTracker;

        _enUsCulture = new CultureInfo("en-US", false).NumberFormat;
        _enUsCulture.NumberDecimalDigits = 0;
        _enUsCulture.NumberGroupSeparator = " ";
        _tracker = tracker;
        _configService = configService;
    }

    public async Task<string> GetBalanceStringAsync(ulong userId)
    {
        var bal = await _cs.GetBalanceAsync(userId);
        return N(bal);
    }

    [Cmd]
    public async Task BetStats()
    {
        var stats = await _gamblingTxTracker.GetAllAsync();

        var eb = _sender.CreateEmbed()
                        .WithOkColor();

        var str = "` Feature `｜`   Bet  `｜`Paid Out`｜`  RoI  `\n";
        str += "――――――――――――――――――――\n";
        foreach (var stat in stats)
        {
            var perc = (stat.PaidOut / stat.Bet).ToString("P2", Culture);
            str += $"`{stat.Feature.PadBoth(9)}`"
                   + $"｜`{stat.Bet.ToString("N0").PadLeft(8, ' ')}`"
                   + $"｜`{stat.PaidOut.ToString("N0").PadLeft(8, ' ')}`"
                   + $"｜`{perc.PadLeft(6, ' ')}`\n";
        }

        var bet = stats.Sum(x => x.Bet);
        var paidOut = stats.Sum(x => x.PaidOut);

        if (bet == 0)
            bet = 1;

        var tPerc = (paidOut / bet).ToString("P2", Culture);
        str += "――――――――――――――――――――\n";
        str += $"` {("TOTAL").PadBoth(7)}` "
               + $"｜**{N(bet).PadLeft(8, ' ')}**"
               + $"｜**{N(paidOut).PadLeft(8, ' ')}**"
               + $"｜`{tPerc.PadLeft(6, ' ')}`";

        eb.WithDescription(str);

        await Response().Embed(eb).SendAsync();
    }

    [Cmd]
    public async Task Economy()
    {
        var ec = await _service.GetEconomyAsync();
        decimal onePercent = 0;

        // This stops the top 1% from owning more than 100% of the money
        if (ec.Cash > 0)
        {
            onePercent = ec.OnePercent / (ec.Cash - ec.Bot);
        }

        // [21:03] Bob Page: Kinda remids me of US economy
        var embed = _sender.CreateEmbed()
                           .WithTitle(GetText(strs.economy_state))
                           .AddField(GetText(strs.currency_owned), N(ec.Cash - ec.Bot))
                           .AddField(GetText(strs.currency_one_percent), (onePercent * 100).ToString("F2") + "%")
                           .AddField(GetText(strs.currency_planted), N(ec.Planted))
                           .AddField(GetText(strs.owned_waifus_total), N(ec.Waifus))
                           .AddField(GetText(strs.bot_currency), N(ec.Bot))
                           .AddField(GetText(strs.bank_accounts), N(ec.Bank))
                           .AddField(GetText(strs.total), N(ec.Cash + ec.Planted + ec.Waifus + ec.Bank))
                           .WithOkColor();

        // ec.Cash already contains ec.Bot as it's the total of all values in the CurrencyAmount column of the DiscordUser table
        await Response().Embed(embed).SendAsync();
    }

    private static readonly FeatureLimitKey _timelyKey = new FeatureLimitKey()
    {
        Key = "timely:extra_percent",
        PrettyName = "Timely"
    };

    private async Task RemindTimelyAction(SocketMessageComponent smc, DateTime when)
    {
        var tt = TimestampTag.FromDateTime(when, TimestampTagStyles.Relative);

        await _remind.AddReminderAsync(ctx.User.Id,
            ctx.User.Id,
            ctx.Guild?.Id,
            true,
            when,
            GetText(strs.timely_time),
            ReminderType.Timely);

        await smc.RespondConfirmAsync(_sender, GetText(strs.remind_timely(tt)), ephemeral: true);
    }

    private EllieInteractionBase CreateRemindMeInteraction(int period)
        => _inter
            .Create(ctx.User.Id,
                new ButtonBuilder(
                    label: "Remind me",
                    emote: Emoji.Parse("⏰"),
                    customId: "timely:remind_me"),
                (smc) => RemindTimelyAction(smc, DateTime.UtcNow.Add(TimeSpan.FromHours(period)))
            );

    [Cmd]
    public async Task Timely()
    {
        var val = Config.Timely.Amount;
        var period = Config.Timely.Cooldown;
        if (val <= 0 || period <= 0)
        {
            await Response().Error(strs.timely_none).SendAsync();
            return;
        }

        var inter = CreateRemindMeInteraction(period);

        if (await _service.ClaimTimelyAsync(ctx.User.Id, period) is { } rem)
        {
            // Removes timely button if there is a timely reminder in DB
            if (_service.UserHasTimelyReminder(ctx.User.Id))
            {
                inter = null;
            }

            var now = DateTime.UtcNow;
            var relativeTag = TimestampTag.FromDateTime(now.Add(rem), TimestampTagStyles.Relative);
            await Response().Pending(strs.timely_already_claimed(relativeTag)).Interaction(inter).SendAsync();
            return;
        }

        var result = await _ps.TryGetFeatureLimitAsync(_timelyKey, ctx.User.Id, 0);

        val = (int)(val * (1 + (result.Quota! * 0.01f)));

        await _cs.AddAsync(ctx.User.Id, val, new("timely", "claim"));

        await Response().Confirm(strs.timely(N(val), period)).Interaction(inter).SendAsync();
    }

    [Cmd]
    [OwnerOnly]
    public async Task TimelyReset()
    {
        await _service.RemoveAllTimelyClaimsAsync();
        await Response().Confirm(strs.timely_reset).SendAsync();
    }

    [Cmd]
    [OwnerOnly]
    public async Task TimelySet(int amount, int period = 24)
    {
        if (amount < 0 || period < 0)
        {
            return;
        }

        _configService.ModifyConfig(gs =>
        {
            gs.Timely.Amount = amount;
            gs.Timely.Cooldown = period;
        });

        if (amount == 0)
        {
            await Response().Confirm(strs.timely_set_none).SendAsync();
        }
        else
        {
            await Response()
                  .Confirm(strs.timely_set(Format.Bold(N(amount)), Format.Bold(period.ToString())))
                  .SendAsync();
        }
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    public async Task Raffle([Leftover] IRole role = null)
    {
        role ??= ctx.Guild.EveryoneRole;

        var members = (await role.GetMembersAsync()).Where(u => u.Status != UserStatus.Offline);
        var membersArray = members as IUser[] ?? members.ToArray();
        if (membersArray.Length == 0)
        {
            return;
        }

        var usr = membersArray[new EllieRandom().Next(0, membersArray.Length)];
        await Response()
              .Confirm("🎟 " + GetText(strs.raffled_user),
                  $"**{usr.Username}**",
                  footer: $"ID: {usr.Id}")
              .SendAsync();
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    public async Task RaffleAny([Leftover] IRole role = null)
    {
        role ??= ctx.Guild.EveryoneRole;

        var members = await role.GetMembersAsync();
        var membersArray = members as IUser[] ?? members.ToArray();
        if (membersArray.Length == 0)
        {
            return;
        }

        var usr = membersArray[new EllieRandom().Next(0, membersArray.Length)];
        await Response()
              .Confirm("🎟 " + GetText(strs.raffled_user),
                  $"**{usr.Username}**",
                  footer: $"ID: {usr.Id}")
              .SendAsync();
    }

    [Cmd]
    [Priority(2)]
    public Task CurrencyTransactions(int page = 1)
        => InternalCurrencyTransactions(ctx.User.Id, page);

    [Cmd]
    [OwnerOnly]
    [Priority(0)]
    public Task CurrencyTransactions([Leftover] IUser usr)
        => InternalCurrencyTransactions(usr.Id, 1);

    [Cmd]
    [OwnerOnly]
    [Priority(1)]
    public Task CurrencyTransactions(IUser usr, int page)
        => InternalCurrencyTransactions(usr.Id, page);

    private async Task InternalCurrencyTransactions(ulong userId, int page)
    {
        if (--page < 0)
        {
            return;
        }

        List<CurrencyTransaction> trs;
        await using (var uow = _db.GetDbContext())
        {
            trs = await uow.Set<CurrencyTransaction>().GetPageFor(userId, page);
        }

        var embed = _sender.CreateEmbed()
                           .WithTitle(GetText(strs.transactions(((SocketGuild)ctx.Guild)?.GetUser(userId)?.ToString()
                                                                ?? $"{userId}")))
                           .WithOkColor();

        var sb = new StringBuilder();
        foreach (var tr in trs)
        {
            var change = tr.Amount >= 0 ? "🔵" : "🔴";
            var kwumId = new kwum(tr.Id).ToString();
            var date = $"#{Format.Code(kwumId)} `〖{GetFormattedCurtrDate(tr)}〗`";

            sb.AppendLine($"\\{change} {date} {Format.Bold(N(tr.Amount))}");
            var transactionString = GetHumanReadableTransaction(tr.Type, tr.Extra, tr.OtherId);
            if (transactionString is not null)
            {
                sb.AppendLine(transactionString);
            }

            if (!string.IsNullOrWhiteSpace(tr.Note))
            {
                sb.AppendLine($"\t`Note:` {tr.Note.TrimTo(50)}");
            }
        }

        embed.WithDescription(sb.ToString());
        embed.WithFooter(GetText(strs.page(page + 1)));
        await Response().Embed(embed).SendAsync();
    }

    private static string GetFormattedCurtrDate(CurrencyTransaction ct)
        => $"{ct.DateAdded:HH:mm yyyy-MM-dd}";

    [Cmd]
    public async Task CurrencyTransaction(kwum id)
    {
        int intId = id;
        await using var uow = _db.GetDbContext();

        var tr = await uow.Set<CurrencyTransaction>()
                          .ToLinqToDBTable()
                          .Where(x => x.Id == intId && x.UserId == ctx.User.Id)
                          .FirstOrDefaultAsync();

        if (tr is null)
        {
            await Response().Error(strs.not_found).SendAsync();
            return;
        }

        var eb = _sender.CreateEmbed().WithOkColor();

        eb.WithAuthor(ctx.User);
        eb.WithTitle(GetText(strs.transaction));
        eb.WithDescription(new kwum(tr.Id).ToString());
        eb.AddField("Amount", N(tr.Amount));
        eb.AddField("Type", tr.Type, true);
        eb.AddField("Extra", tr.Extra, true);

        if (tr.OtherId is ulong other)
        {
            eb.AddField("From Id", other);
        }

        if (!string.IsNullOrWhiteSpace(tr.Note))
        {
            eb.AddField("Note", tr.Note);
        }

        eb.WithFooter(GetFormattedCurtrDate(tr));

        await Response().Embed(eb).SendAsync();
    }

    private string GetHumanReadableTransaction(string type, string subType, ulong? maybeUserId)
        => (type, subType, maybeUserId) switch
        {
            ("gift", var name, ulong userId) => GetText(strs.curtr_gift(name, userId)),
            ("award", var name, ulong userId) => GetText(strs.curtr_award(name, userId)),
            ("take", var name, ulong userId) => GetText(strs.curtr_take(name, userId)),
            ("blackjack", _, _) => $"Blackjack - {subType}",
            ("wheel", _, _) => $"Lucky Ladder - {subType}",
            ("lula", _, _) => $"Lucky Ladder - {subType}",
            ("rps", _, _) => $"Rock Paper Scissors - {subType}",
            (null, _, _) => null,
            (_, null, _) => null,
            (_, _, ulong userId) => $"{type} - {subType} | [{userId}]",
            _ => $"{type} - {subType}"
        };

    [Cmd]
    [Priority(0)]
    public async Task Cash(ulong userId)
    {
        var cur = await GetBalanceStringAsync(userId);
        await Response().Confirm(strs.has(Format.Code(userId.ToString()), cur)).SendAsync();
    }

    private async Task BankAction(SocketMessageComponent smc)
    {
        var balance = await _bank.GetBalanceAsync(ctx.User.Id);

        await N(balance)
              .Pipe(strs.bank_balance)
              .Pipe(GetText)
              .Pipe(text => smc.RespondConfirmAsync(_sender, text, ephemeral: true));
    }

    private EllieInteractionBase CreateCashInteraction()
        => _inter.Create(ctx.User.Id,
            new ButtonBuilder(
                customId: "cash:bank_show_balance",
                emote: new Emoji("🏦")),
            BankAction);

    [Cmd]
    [Priority(1)]
    public async Task Cash([Leftover] IUser user = null)
    {
        user ??= ctx.User;
        var cur = await GetBalanceStringAsync(user.Id);

        var inter = user == ctx.User
            ? CreateCashInteraction()
            : null;

        await Response()
              .Confirm(
                  user.ToString()
                      .Pipe(Format.Bold)
                      .With(cur)
                      .Pipe(strs.has))
              .Interaction(inter)
              .SendAsync();
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    [Priority(0)]
    public async Task Give(
        [OverrideTypeReader(typeof(BalanceTypeReader))]
        long amount,
        IGuildUser receiver,
        [Leftover] string msg)
    {
        if (amount <= 0 || ctx.User.Id == receiver.Id || receiver.IsBot)
        {
            return;
        }

        if (!await _cs.TransferAsync(_sender, ctx.User, receiver, amount, msg, N(amount)))
        {
            await Response().Error(strs.not_enough(CurrencySign)).SendAsync();
            return;
        }

        await Response().Confirm(strs.gifted(N(amount), Format.Bold(receiver.ToString()), ctx.User)).SendAsync();
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    [Priority(1)]
    public Task Give([OverrideTypeReader(typeof(BalanceTypeReader))] long amount, [Leftover] IGuildUser receiver)
        => Give(amount, receiver, null);

    [Cmd]
    [RequireContext(ContextType.Guild)]
    [OwnerOnly]
    [Priority(0)]
    public Task Award(long amount, IGuildUser usr, [Leftover] string msg)
        => Award(amount, usr.Id, msg);

    [Cmd]
    [RequireContext(ContextType.Guild)]
    [OwnerOnly]
    [Priority(1)]
    public Task Award(long amount, [Leftover] IGuildUser usr)
        => Award(amount, usr.Id);

    [Cmd]
    [OwnerOnly]
    [Priority(2)]
    public async Task Award(long amount, ulong usrId, [Leftover] string msg = null)
    {
        if (amount <= 0)
        {
            return;
        }

        var usr = await ((DiscordSocketClient)Context.Client).Rest.GetUserAsync(usrId);

        if (usr is null)
        {
            await Response().Error(strs.user_not_found).SendAsync();
            return;
        }

        await _cs.AddAsync(usr.Id, amount, new("award", ctx.User.ToString()!, msg, ctx.User.Id));
        await Response().Confirm(strs.awarded(N(amount), $"<@{usrId}>", ctx.User)).SendAsync();
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    [OwnerOnly]
    [Priority(3)]
    public async Task Award(long amount, [Leftover] IRole role)
    {
        var users = (await ctx.Guild.GetUsersAsync()).Where(u => u.GetRoles().Contains(role)).ToList();

        await _cs.AddBulkAsync(users.Select(x => x.Id).ToList(),
            amount,
            new("award", ctx.User.ToString()!, role.Name, ctx.User.Id));

        await Response()
              .Confirm(strs.mass_award(N(amount),
                  Format.Bold(users.Count.ToString()),
                  Format.Bold(role.Name)))
              .SendAsync();
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    [OwnerOnly]
    [Priority(0)]
    public async Task Take(long amount, [Leftover] IRole role)
    {
        var users = (await role.GetMembersAsync()).ToList();

        await _cs.RemoveBulkAsync(users.Select(x => x.Id).ToList(),
            amount,
            new("take", ctx.User.ToString()!, null, ctx.User.Id));

        await Response()
              .Confirm(strs.mass_take(N(amount),
                  Format.Bold(users.Count.ToString()),
                  Format.Bold(role.Name)))
              .SendAsync();
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    [OwnerOnly]
    [Priority(1)]
    public async Task Take(long amount, [Leftover] IGuildUser user)
    {
        if (amount <= 0)
        {
            return;
        }

        var extra = new TxData("take", ctx.User.ToString()!, null, ctx.User.Id);

        if (await _cs.RemoveAsync(user.Id, amount, extra))
        {
            await Response().Confirm(strs.take(N(amount), Format.Bold(user.ToString()))).SendAsync();
        }
        else
        {
            await Response().Error(strs.take_fail(N(amount), Format.Bold(user.ToString()), CurrencySign)).SendAsync();
        }
    }

    [Cmd]
    [OwnerOnly]
    public async Task Take(long amount, [Leftover] ulong usrId)
    {
        if (amount <= 0)
        {
            return;
        }

        var extra = new TxData("take", ctx.User.ToString()!, null, ctx.User.Id);

        if (await _cs.RemoveAsync(usrId, amount, extra))
        {
            await Response().Confirm(strs.take(N(amount), $"<@{usrId}>")).SendAsync();
        }
        else
        {
            await Response().Error(strs.take_fail(N(amount), Format.Code(usrId.ToString()), CurrencySign)).SendAsync();
        }
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    public async Task RollDuel(IUser u)
    {
        if (ctx.User.Id == u.Id)
        {
            return;
        }

        //since the challenge is created by another user, we need to reverse the ids
        //if it gets removed, means challenge is accepted
        if (_service.Duels.TryRemove((ctx.User.Id, u.Id), out var game))
        {
            await game.StartGame();
        }
    }

    [Cmd]
    [RequireContext(ContextType.Guild)]
    public async Task RollDuel([OverrideTypeReader(typeof(BalanceTypeReader))] long amount, IUser u)
    {
        if (ctx.User.Id == u.Id)
        {
            return;
        }

        if (amount <= 0)
        {
            return;
        }

        var embed = _sender.CreateEmbed().WithOkColor().WithTitle(GetText(strs.roll_duel));

        var description = string.Empty;

        var game = new RollDuelGame(_cs, _client.CurrentUser.Id, ctx.User.Id, u.Id, amount);
        //means challenge is just created
        if (_service.Duels.TryGetValue((ctx.User.Id, u.Id), out var other))
        {
            if (other.Amount != amount)
            {
                await Response().Error(strs.roll_duel_already_challenged).SendAsync();
            }
            else
            {
                await RollDuel(u);
            }

            return;
        }

        if (_service.Duels.TryAdd((u.Id, ctx.User.Id), game))
        {
            game.OnGameTick += GameOnGameTick;
            game.OnEnded += GameOnEnded;

            await Response()
                  .Confirm(strs.roll_duel_challenge(Format.Bold(ctx.User.ToString()),
                      Format.Bold(u.ToString()),
                      Format.Bold(N(amount))))
                  .SendAsync();
        }

        async Task GameOnGameTick(RollDuelGame arg)
        {
            var rolls = arg.Rolls.Last();
            description += $@"{Format.Bold(ctx.User.ToString())} rolled **{rolls.Item1}**
{Format.Bold(u.ToString())} rolled **{rolls.Item2}**
--
";
            embed = embed.WithDescription(description);

            if (rdMsg is null)
            {
                rdMsg = await Response().Embed(embed).SendAsync();
            }
            else
            {
                await rdMsg.ModifyAsync(x => { x.Embed = embed.Build(); });
            }
        }

        async Task GameOnEnded(RollDuelGame rdGame, RollDuelGame.Reason reason)
        {
            try
            {
                if (reason == RollDuelGame.Reason.Normal)
                {
                    var winner = rdGame.Winner == rdGame.P1 ? ctx.User : u;
                    description += $"\n**{winner}** Won {N((long)(rdGame.Amount * 2 * 0.98))}";

                    embed = embed.WithDescription(description);

                    await rdMsg.ModifyAsync(x => x.Embed = embed.Build());
                }
                else if (reason == RollDuelGame.Reason.Timeout)
                {
                    await Response().Error(strs.roll_duel_timeout).SendAsync();
                }
                else if (reason == RollDuelGame.Reason.NoFunds)
                {
                    await Response().Error(strs.roll_duel_no_funds).SendAsync();
                }
            }
            finally
            {
                _service.Duels.TryRemove((u.Id, ctx.User.Id), out _);
            }
        }
    }

    [Cmd]
    public async Task BetRoll([OverrideTypeReader(typeof(BalanceTypeReader))] long amount)
    {
        if (!await CheckBetMandatory(amount))
        {
            return;
        }

        var maybeResult = await _gs.BetRollAsync(ctx.User.Id, amount);
        if (!maybeResult.TryPickT0(out var result, out _))
        {
            await Response().Error(strs.not_enough(CurrencySign)).SendAsync();
            return;
        }


        var win = (long)result.Won;
        string str;
        if (win > 0)
        {
            str = GetText(strs.br_win(N(win), result.Threshold + (result.Roll == 100 ? " 👑" : "")));
        }
        else
        {
            str = GetText(strs.better_luck);
        }

        var eb = _sender.CreateEmbed()
                        .WithAuthor(ctx.User)
                        .WithDescription(Format.Bold(str))
                        .AddField(GetText(strs.roll2), result.Roll.ToString(CultureInfo.InvariantCulture))
                        .WithOkColor();

        await Response().Embed(eb).SendAsync();
    }

    [Cmd]
    [EllieOptions<LbOpts>]
    [Priority(0)]
    public Task Leaderboard(params string[] args)
        => Leaderboard(1, args);

    [Cmd]
    [EllieOptions<LbOpts>]
    [Priority(1)]
    public async Task Leaderboard(int page = 1, params string[] args)
    {
        if (--page < 0)
        {
            return;
        }

        var (opts, _) = OptionsParser.ParseFrom(new LbOpts(), args);

        // List<DiscordUser> cleanRichest;
        // it's pointless to have clean on dm context
        if (ctx.Guild is null)
        {
            opts.Clean = false;
        }


        async Task<IReadOnlyCollection<DiscordUser>> GetTopRichest(int curPage)
        {
            if (opts.Clean)
            {
                await ctx.Channel.TriggerTypingAsync();
                await _tracker.EnsureUsersDownloadedAsync(ctx.Guild);

                await using var uow = _db.GetDbContext();

                var cleanRichest = await uow.Set<DiscordUser>()
                                            .GetTopRichest(_client.CurrentUser.Id, 0, 1000);

                var sg = (SocketGuild)ctx.Guild!;
                return cleanRichest.Where(x => sg.GetUser(x.UserId) is not null).ToList();
            }
            else
            {
                await using var uow = _db.GetDbContext();
                return await uow.Set<DiscordUser>().GetTopRichest(_client.CurrentUser.Id, curPage);
            }
        }

        var res = Response()
            .Paginated();

        await Response()
              .Paginated()
              .PageItems(GetTopRichest)
              .TotalElements(900)
              .PageSize(9)
              .CurrentPage(page)
              .Page((toSend, curPage) =>
              {
                  var embed = _sender.CreateEmbed()
                                     .WithOkColor()
                                     .WithTitle(CurrencySign + " " + GetText(strs.leaderboard));

                  if (!toSend.Any())
                  {
                      embed.WithDescription(GetText(strs.no_user_on_this_page));
                      return Task.FromResult(embed);
                  }

                  for (var i = 0; i < toSend.Count; i++)
                  {
                      var x = toSend[i];
                      var usrStr = x.ToString().TrimTo(20, true);

                      var j = i;
                      embed.AddField("#" + ((9 * curPage) + j + 1) + " " + usrStr, N(x.CurrencyAmount), true);
                  }

                  return Task.FromResult(embed);
              })
              .SendAsync();
    }

    public enum InputRpsPick : byte
    {
        R = 0,
        Rock = 0,
        Rocket = 0,
        P = 1,
        Paper = 1,
        Paperclip = 1,
        S = 2,
        Scissors = 2
    }

    [Cmd]
    public async Task Rps(InputRpsPick pick, [OverrideTypeReader(typeof(BalanceTypeReader))] long amount = default)
    {
        static string GetRpsPick(InputRpsPick p)
        {
            switch (p)
            {
                case InputRpsPick.R:
                    return "🚀";
                case InputRpsPick.P:
                    return "📎";
                default:
                    return "✂️";
            }
        }

        if (!await CheckBetOptional(amount) || amount == 1)
            return;

        var res = await _gs.RpsAsync(ctx.User.Id, amount, (byte)pick);

        if (!res.TryPickT0(out var result, out _))
        {
            await Response().Error(strs.not_enough(CurrencySign)).SendAsync();
            return;
        }

        var embed = _sender.CreateEmbed();

        string msg;
        if (result.Result == RpsResultType.Draw)
        {
            msg = GetText(strs.rps_draw(GetRpsPick(pick)));
        }
        else if (result.Result == RpsResultType.Win)
        {
            if ((long)result.Won > 0)
                embed.AddField(GetText(strs.won), N((long)result.Won));

            msg = GetText(strs.rps_win(ctx.User.Mention,
                GetRpsPick(pick),
                GetRpsPick((InputRpsPick)result.ComputerPick)));
        }
        else
        {
            msg = GetText(strs.rps_win(ctx.Client.CurrentUser.Mention,
                GetRpsPick((InputRpsPick)result.ComputerPick),
                GetRpsPick(pick)));
        }

        embed
            .WithOkColor()
            .WithDescription(msg);

        await Response().Embed(embed).SendAsync();
    }

    private static readonly ImmutableArray<string> _emojis =
        new[] { "⬆", "↖", "⬅", "↙", "⬇", "↘", "➡", "↗" }.ToImmutableArray();

    [Cmd]
    public async Task LuckyLadder([OverrideTypeReader(typeof(BalanceTypeReader))] long amount)
    {
        if (!await CheckBetMandatory(amount))
            return;

        var res = await _gs.LulaAsync(ctx.User.Id, amount);
        if (!res.TryPickT0(out var result, out _))
        {
            await Response().Error(strs.not_enough(CurrencySign)).SendAsync();
            return;
        }

        var multis = result.Multipliers;

        var sb = new StringBuilder();
        foreach (var multi in multis)
        {
            sb.Append($"╠══╣");

            if (multi == result.Multiplier)
                sb.Append($"{Format.Bold($"x{multi:0.##}")} ⬅️");
            else
                sb.Append($"||x{multi:0.##}||");

            sb.AppendLine();
        }

        var eb = _sender.CreateEmbed()
                        .WithOkColor()
                        .WithDescription(sb.ToString())
                        .AddField(GetText(strs.multiplier), $"{result.Multiplier:0.##}x", true)
                        .AddField(GetText(strs.won), $"{(long)result.Won}", true)
                        .WithAuthor(ctx.User);


        await Response().Embed(eb).SendAsync();
    }


    public enum GambleTestTarget
    {
        Slot,
        Betroll,
        Betflip,
        BetflipT,
        BetDraw,
        BetDrawHL,
        BetDrawRB,
        Lula,
        Rps,
    }

    [Cmd]
    [OwnerOnly]
    public async Task BetTest()
    {
        var values = Enum.GetValues<GambleTestTarget>()
                         .Select(x => $"`{x}`")
                         .Join(", ");

        await Response().Confirm(GetText(strs.available_tests), values).SendAsync();
    }

    [Cmd]
    [OwnerOnly]
    public async Task BetTest(GambleTestTarget target, int tests = 1000)
    {
        if (tests <= 0)
            return;

        await ctx.Channel.TriggerTypingAsync();

        var streak = 0;
        var maxW = 0;
        var maxL = 0;

        var dict = new Dictionary<decimal, int>();
        for (var i = 0; i < tests; i++)
        {
            var multi = target switch
            {
                GambleTestTarget.BetDraw => (await _gs.BetDrawAsync(ctx.User.Id, 0, 1, 0)).AsT0.Multiplier,
                GambleTestTarget.BetDrawRB => (await _gs.BetDrawAsync(ctx.User.Id, 0, null, 1)).AsT0.Multiplier,
                GambleTestTarget.BetDrawHL => (await _gs.BetDrawAsync(ctx.User.Id, 0, 0, null)).AsT0.Multiplier,
                GambleTestTarget.Slot => (await _gs.SlotAsync(ctx.User.Id, 0)).AsT0.Multiplier,
                GambleTestTarget.Betflip => (await _gs.BetFlipAsync(ctx.User.Id, 0, 0)).AsT0.Multiplier,
                GambleTestTarget.BetflipT => (await _gs.BetFlipAsync(ctx.User.Id, 0, 1)).AsT0.Multiplier,
                GambleTestTarget.Lula => (await _gs.LulaAsync(ctx.User.Id, 0)).AsT0.Multiplier,
                GambleTestTarget.Rps => (await _gs.RpsAsync(ctx.User.Id, 0, (byte)(i % 3))).AsT0.Multiplier,
                GambleTestTarget.Betroll => (await _gs.BetRollAsync(ctx.User.Id, 0)).AsT0.Multiplier,
                _ => throw new ArgumentOutOfRangeException(nameof(target))
            };

            if (dict.ContainsKey(multi))
                dict[multi] += 1;
            else
                dict.Add(multi, 1);

            if (multi < 1)
            {
                if (streak <= 0)
                    --streak;
                else
                    streak = -1;

                maxL = Math.Max(maxL, -streak);
            }
            else if (multi > 1)
            {
                if (streak >= 0)
                    ++streak;
                else
                    streak = 1;

                maxW = Math.Max(maxW, streak);
            }
        }

        var sb = new StringBuilder();
        decimal payout = 0;
        foreach (var key in dict.Keys.OrderByDescending(x => x))
        {
            sb.AppendLine($"x**{key}** occured `{dict[key]}` times. {dict[key] * 1.0f / tests * 100}%");
            payout += key * dict[key];
        }

        sb.AppendLine();
        sb.AppendLine($"Longest win streak: `{maxW}`");
        sb.AppendLine($"Longest lose streak: `{maxL}`");

        await Response()
              .Confirm(GetText(strs.test_results_for(target)),
                  sb.ToString(),
                  footer: $"Total Bet: {tests} | Payout: {payout:F0} | {payout * 1.0M / tests * 100}%")
              .SendAsync();
    }
}