using Discord;
using Discord.Commands;
using Discord.WebSocket;
using NadekoBot.Common.Attributes;
using NadekoBot.Extensions;
using NadekoBot.Modules.Xp.Common;
using NadekoBot.Modules.Xp.Services;
using NadekoBot.Core.Services;
using NadekoBot.Core.Services.Database.Models;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;

namespace NadekoBot.Modules.Xp
{
    public partial class Xp : NadekoTopLevelModule<XpService>
    {
        private readonly DiscordSocketClient _client;
        private readonly DbService _db;

        public Xp(DiscordSocketClient client,DbService db)
        {
            _client = client;
            _db = db;
        }

        //[NadekoCommand, Usage, Description, Aliases]
        //[RequireContext(ContextType.Guild)]
        //[OwnerOnly]
        //public async Task Populate()
        //{
        //    var rng = new NadekoRandom();
        //    using (var uow = _db.UnitOfWork)
        //    {
        //        for (var i = 0ul; i < 1000000; i++)
        //        {
        //            uow.DiscordUsers.Add(new DiscordUser()
        //            {
        //                AvatarId = i.ToString(),
        //                Discriminator = "1234",
        //                UserId = i,
        //                Username = i.ToString(),
        //                Club = null,
        //            });
        //            var xp = uow.Xp.GetOrCreateUser(Context.Guild.Id, i);
        //            xp.Xp = rng.Next(100, 100000);
        //        }
        //        uow.Complete();
        //    }
        //}

        [NadekoCommand, Usage, Description, Aliases]
        [RequireContext(ContextType.Guild)]
        //[Ratelimit(30)]
        public async Task Experience([Remainder]IUser user = null)
        {
            user = user ?? Context.User;
            var sw = Stopwatch.StartNew();
            await Context.Channel.TriggerTypingAsync();
            var img = await _service.GenerateImageAsync((IGuildUser)user);
            sw.Stop();
            _log.Info("Generating finished in {0:F2}s", sw.Elapsed.TotalSeconds);
            sw.Restart();
            await Context.Channel.SendFileAsync(img, $"{user.Id}_xp.png")
                .ConfigureAwait(false);
            sw.Stop();
            _log.Info("Sending finished in {0:F2}s", sw.Elapsed.TotalSeconds);
        }

        [NadekoCommand, Usage, Description, Aliases]
        [RequireContext(ContextType.Guild)]
        public Task XpRoleRewards(int page = 1)
        {
            page--;

            if (page < 0 || page > 100)
                return Task.CompletedTask;

            var roles = _service.GetRoleRewards(Context.Guild.Id)
                .OrderBy(x => x.Level)
                .Skip(page * 9)
                .Take(9);

            var embed = new EmbedBuilder()
                .WithTitle(GetText("role_rewards"))
                .WithOkColor();

            if (!roles.Any())
                return Context.Channel.EmbedAsync(embed.WithDescription(GetText("no_role_rewards")));

            foreach (var rolerew in roles)
            {
                var role = Context.Guild.GetRole(rolerew.RoleId);

                if (role == null)
                    continue;

                embed.AddField(GetText("level_x", Format.Bold(rolerew.Level.ToString())), role.ToString());
            }
            return Context.Channel.EmbedAsync(embed);
        }

        [NadekoCommand, Usage, Description, Aliases]
        [RequireUserPermission(GuildPermission.ManageRoles)]
        [RequireContext(ContextType.Guild)]
        public async Task XpRoleReward(int level, [Remainder] IRole role = null)
        {
            if (level < 1)
                return;

            _service.SetRoleReward(Context.Guild.Id, level, role?.Id);

            if(role == null)
                await ReplyConfirmLocalized("role_reward_cleared", level).ConfigureAwait(false);
            else
                await ReplyConfirmLocalized("role_reward_added", level, Format.Bold(role.ToString())).ConfigureAwait(false);
        }

        public enum NotifyPlace
        {
            Server = 0,
            Guild = 0,
            Global = 1,
        }

        [NadekoCommand, Usage, Description, Aliases]
        [RequireContext(ContextType.Guild)]
        public async Task XpNotify(NotifyPlace place = NotifyPlace.Guild, XpNotificationType type = XpNotificationType.Channel)
        {
            if (place == NotifyPlace.Guild)
                await _service.ChangeNotificationType(Context.User.Id, Context.Guild.Id, type);
            else
                await _service.ChangeNotificationType(Context.User, type);
            await Context.Channel.SendConfirmAsync("👌").ConfigureAwait(false);
        }

        public enum Server { Server };

        [NadekoCommand, Usage, Description, Aliases]
        [RequireContext(ContextType.Guild)]
        [RequireUserPermission(GuildPermission.Administrator)]
        public async Task XpExclude(Server _)
        {
            var ex = _service.ToggleExcludeServer(Context.Guild.Id);

            await ReplyConfirmLocalized((ex ? "excluded" : "not_excluded"), Format.Bold(Context.Guild.ToString())).ConfigureAwait(false);
        }

        public enum Role { Role };

        [NadekoCommand, Usage, Description, Aliases]
        [RequireUserPermission(GuildPermission.ManageRoles)]
        [RequireContext(ContextType.Guild)]
        public async Task XpExclude(Role _, [Remainder] IRole role)
        {
            var ex = _service.ToggleExcludeRole(Context.Guild.Id, role.Id);

            await ReplyConfirmLocalized((ex ? "excluded" : "not_excluded"), Format.Bold(role.ToString())).ConfigureAwait(false);
        }

        public enum Channel { Channel };

        [NadekoCommand, Usage, Description, Aliases]
        [RequireUserPermission(GuildPermission.ManageChannels)]
        [RequireContext(ContextType.Guild)]
        public async Task XpExclude(Channel _, [Remainder] ITextChannel channel = null)
        {
            if (channel == null)
                channel = (ITextChannel)Context.Channel;

            var ex = _service.ToggleExcludeChannel(Context.Guild.Id, channel.Id);

            await ReplyConfirmLocalized((ex ? "excluded" : "not_excluded"), Format.Bold(channel.ToString())).ConfigureAwait(false);
        }

        [NadekoCommand, Usage, Description, Aliases]
        [RequireContext(ContextType.Guild)]
        public async Task XpExclusionList()
        {
            var serverExcluded = _service.IsServerExcluded(Context.Guild.Id);
            var roles = _service.GetExcludedRoles(Context.Guild.Id)
                .Select(x => Context.Guild.GetRole(x)?.Name)
                .Where(x => x != null);

            var chans = (await Task.WhenAll(_service.GetExcludedChannels(Context.Guild.Id)
                .Select(x => Context.Guild.GetChannelAsync(x)))
                .ConfigureAwait(false))
                    .Where(x => x != null)
                    .Select(x => x.Name);

            var embed = new EmbedBuilder()
                .WithTitle(GetText("exclusion_list"))
                .WithDescription((serverExcluded ? GetText("server_is_excluded") : GetText("server_is_not_excluded")))
                .AddField(GetText("excluded_roles"), roles.Any() ? string.Join("\n", roles) : "-", false)
                .AddField(GetText("excluded_channels"), chans.Any() ? string.Join("\n", chans) : "-", false)
                .WithOkColor();

            await Context.Channel.EmbedAsync(embed).ConfigureAwait(false);
        }

        [NadekoCommand, Usage, Description, Aliases]
        [RequireContext(ContextType.Guild)]
        public Task XpLeaderboard(int page = 1)
        {
            if (--page < 0 || page > 100)
                return Task.CompletedTask;

            return Context.Channel.SendPaginatedConfirmAsync(_client, page, async (curPage) =>
            {
                var users = _service.GetUserXps(Context.Guild.Id, curPage);

                var embed = new EmbedBuilder()
                    .WithTitle(GetText("server_leaderboard"))
                    .WithOkColor();

                if (!users.Any())
                    return embed.WithDescription("-");
                else
                {
                    for (int i = 0; i < users.Length; i++)
                    {
                        var levelStats = LevelStats.FromXp(users[i].Xp + users[i].AwardedXp);
                        var user = await Context.Guild.GetUserAsync(users[i].UserId).ConfigureAwait(false);

                        var userXpData = users[i];

                        var awardStr = "";
                        if (userXpData.AwardedXp > 0)
                            awardStr = $"(+{userXpData.AwardedXp})";
                        else if (userXpData.AwardedXp < 0)
                            awardStr = $"({userXpData.AwardedXp.ToString()})";

                        embed.AddField(
                            $"#{(i + 1 + curPage * 9)} {(user?.ToString() ?? users[i].UserId.ToString())}",
                            $"{GetText("level_x", levelStats.Level)} - {levelStats.TotalXp}xp {awardStr}");
                    }
                    return embed;
                }
            }, addPaginatedFooter: false);
        }

        [NadekoCommand, Usage, Description, Aliases]
        [RequireContext(ContextType.Guild)]
        public async Task XpGlobalLeaderboard(int page = 1)
        {
            if (--page < 0 || page > 100)
                return;
            var users = _service.GetUserXps(page);

            var embed = new EmbedBuilder()
                .WithTitle(GetText("global_leaderboard"))
                .WithOkColor();

            if (!users.Any())
                embed.WithDescription("-");
            else
            {
                for (int i = 0; i < users.Length; i++)
                {
                    var user = users[i];
                    embed.AddField(
                        $"#{(i + 1 + page * 9)} {(user.ToString())}", 
                        $"{GetText("level_x", LevelStats.FromXp(users[i].TotalXp).Level)} - {users[i].TotalXp}xp");
                }
            }

            await Context.Channel.EmbedAsync(embed);
        }

        [NadekoCommand, Usage, Description, Aliases]
        [RequireContext(ContextType.Guild)]
        [RequireUserPermission(GuildPermission.Administrator)]
        public async Task XpAdd(int amount, [Remainder] IGuildUser user)
        {
            if (amount == 0)
                return;

            _service.AddXp(user.Id, Context.Guild.Id, amount);

            await ReplyConfirmLocalized("modified", Format.Bold(user.ToString()), Format.Bold(amount.ToString())).ConfigureAwait(false);
        }
    }
}