using Discord.Commands;
using NadekoBot.Classes;
using NadekoBot.Extensions;
using System;
using System.Drawing;
using System.Threading.Tasks;

namespace NadekoBot.Modules.Gambling
{
    internal class FlipCoinCommand : DiscordCommand
    {

        public FlipCoinCommand(DiscordModule module) : base(module) { }

        internal override void Init(CommandGroupBuilder cgb)
        {
            cgb.CreateCommand(Module.Prefix + "flip")
                .Description($"Flips coin(s) - heads or tails, and shows an image. | `{Prefix}flip` or `{Prefix}flip 3`")
                .Parameter("count", ParameterType.Optional)
                .Do(FlipCoinFunc());

            cgb.CreateCommand(Module.Prefix + "betflip")
                .Alias(Prefix+"bf")
                .Description($"Bet to guess will the result be heads or tails. Guessing award you double flowers you've bet. | `{Prefix}bf 5 heads` or `{Prefix}bf 3 t`")
                .Parameter("amount", ParameterType.Required)
                .Parameter("guess", ParameterType.Required)
                .Do(BetFlipCoinFunc());
        }



        private readonly Random rng = new Random();
        public Func<CommandEventArgs, Task> BetFlipCoinFunc() => async e =>
        {

            var amountstr = e.GetArg("amount").Trim();

            var guessStr = e.GetArg("guess").Trim().ToUpperInvariant();
            if (guessStr != "H" && guessStr != "T" && guessStr != "HEADS" && guessStr != "TAILS")
                return;

            int amount;
            if (!int.TryParse(amountstr, out amount) || amount < 1)
                return;

            var userFlowers = GamblingModule.GetUserFlowers(e.User.Id);

            if (userFlowers < amount)
            {
                await e.Channel.SendMessage($"{e.User.Mention} You don't have enough {NadekoBot.Config.CurrencyName}s. You only have {userFlowers}{NadekoBot.Config.CurrencySign}.").ConfigureAwait(false);
                return;
            }

            await FlowersHandler.RemoveFlowers(e.User, "Betflip Gamble", (int)amount, true).ConfigureAwait(false);
            //heads = true
            //tails = false

            var guess = guessStr == "HEADS" || guessStr == "H";
            bool result = false;
            if (rng.Next(0, 2) == 1) {
                await e.Channel.SendFile("heads.png", Properties.Resources.heads.ToStream(System.Drawing.Imaging.ImageFormat.Png)).ConfigureAwait(false);
                result = true;
            }
            else {
                await e.Channel.SendFile("tails.png", Properties.Resources.tails.ToStream(System.Drawing.Imaging.ImageFormat.Png)).ConfigureAwait(false);
            }

            string str;
            if (guess == result)
            {
                str = $"{e.User.Mention}`You guessed it!` You won {amount * 2}{NadekoBot.Config.CurrencySign}";
                await FlowersHandler.AddFlowersAsync(e.User, "Betflip Gamble", amount * 2, true).ConfigureAwait(false);

            }
            else
                str = $"{e.User.Mention}`More luck next time.`";

            await e.Channel.SendMessage(str).ConfigureAwait(false);
        };

        public Func<CommandEventArgs, Task> FlipCoinFunc() => async e =>
        {

            if (e.GetArg("count") == "")
            {
                if (rng.Next(0, 2) == 1)
                    await e.Channel.SendFile("heads.png", Properties.Resources.heads.ToStream(System.Drawing.Imaging.ImageFormat.Png)).ConfigureAwait(false);
                else
                    await e.Channel.SendFile("tails.png", Properties.Resources.tails.ToStream(System.Drawing.Imaging.ImageFormat.Png)).ConfigureAwait(false);
            }
            else
            {
                int result;
                if (int.TryParse(e.GetArg("count"), out result))
                {
                    if (result > 10)
                        result = 10;
                    var imgs = new Image[result];
                    for (var i = 0; i < result; i++)
                    {
                        imgs[i] = rng.Next(0, 2) == 0 ?
                                    Properties.Resources.tails :
                                    Properties.Resources.heads;
                    }
                    await e.Channel.SendFile($"{result} coins.png", imgs.Merge().ToStream(System.Drawing.Imaging.ImageFormat.Png)).ConfigureAwait(false);
                    return;
                }
                await e.Channel.SendMessage("Invalid number").ConfigureAwait(false);
            }
        };
    }
}