using NadekoBot.Modules.Searches.Common;
using Newtonsoft.Json.Linq;

namespace NadekoBot.Modules.Nsfw;

[NoPublicBot]
public class NSFW : NadekoModule<ISearchImagesService>
{
    private static readonly ConcurrentHashSet<ulong> _hentaiBombBlacklist = new();
    private readonly IHttpClientFactory _httpFactory;
    private readonly NadekoRandom _rng;

    public NSFW(IHttpClientFactory factory)
    {
        _httpFactory = factory;
        _rng = new();
    }

    private async Task InternalBoobs()
    {
        try
        {
            JToken obj;
            using (var http = _httpFactory.CreateClient())
            {
                obj = JArray.Parse(await http
                    .GetStringAsync($"http://api.oboobs.ru/boobs/{new NadekoRandom().Next(0, 10330)}")
                    .ConfigureAwait(false))[0];
            }

            await ctx.Channel.SendMessageAsync($"http://media.oboobs.ru/{obj["preview"]}").ConfigureAwait(false);
        }
        catch (Exception ex)
        {
            await SendErrorAsync(ex.Message).ConfigureAwait(false);
        }
    }

    private async Task InternalButts(IMessageChannel Channel)
    {
        try
        {
            JToken obj;
            using (var http = _httpFactory.CreateClient())
            {
                obj = JArray.Parse(await http
                    .GetStringAsync($"http://api.obutts.ru/butts/{new NadekoRandom().Next(0, 4335)}")
                    .ConfigureAwait(false))[0];
            }

            await Channel.SendMessageAsync($"http://media.obutts.ru/{obj["preview"]}").ConfigureAwait(false);
        }
        catch (Exception ex)
        {
            await SendErrorAsync(ex.Message).ConfigureAwait(false);
        }
    }

    [NadekoCommand, Aliases]
    [RequireNsfw]
    [RequireContext(ContextType.Guild)]
    [UserPerm(ChannelPerm.ManageMessages)]
    public async Task AutoHentai(int interval = 0, [Leftover] string tags = null)
    {
        Timer t;

        if (interval == 0)
        {
            if (!_service.AutoHentaiTimers.TryRemove(ctx.Channel.Id, out t)) return;

            t.Change(Timeout.Infinite, Timeout.Infinite); //proper way to disable the timer
            await ReplyConfirmLocalizedAsync(strs.stopped).ConfigureAwait(false);
            return;
        }

        if (interval < 20)
            return;

        t = new(async state =>
        {
            try
            {
                if (tags is null || tags.Length == 0)
                    await InternalDapiCommand(null, true, _service.Hentai).ConfigureAwait(false);
                else
                {
                    var groups = tags.Split('|');
                    var group = groups[_rng.Next(0, groups.Length)];
                    await InternalDapiCommand(group.Split(' '), true, _service.Hentai).ConfigureAwait(false);
                }
            }
            catch
            {
                // ignored
            }
        }, null, interval * 1000, interval * 1000);

        _service.AutoHentaiTimers.AddOrUpdate(ctx.Channel.Id, t, (key, old) =>
        {
            old.Change(Timeout.Infinite, Timeout.Infinite);
            return t;
        });

        await ReplyConfirmLocalizedAsync(strs.autohentai_started(
            interval,
            string.Join(", ", tags)));
    }

    [NadekoCommand, Aliases]
    [RequireNsfw]
    [RequireContext(ContextType.Guild)]
    [UserPerm(ChannelPerm.ManageMessages)]
    public async Task AutoBoobs(int interval = 0)
    {
        Timer t;

        if (interval == 0)
        {
            if (!_service.AutoBoobTimers.TryRemove(ctx.Channel.Id, out t)) return;

            t.Change(Timeout.Infinite, Timeout.Infinite);
            await ReplyConfirmLocalizedAsync(strs.stopped).ConfigureAwait(false);
            return;
        }

        if (interval < 20)
            return;

        t = new(async state =>
        {
            try
            {
                await InternalBoobs().ConfigureAwait(false);
            }
            catch
            {
                // ignored
            }
        }, null, interval * 1000, interval * 1000);

        _service.AutoBoobTimers.AddOrUpdate(ctx.Channel.Id, t, (key, old) =>
        {
            old.Change(Timeout.Infinite, Timeout.Infinite);
            return t;
        });

        await ReplyConfirmLocalizedAsync(strs.started(interval));
    }

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    [UserPerm(ChannelPerm.ManageMessages)]
    public async Task AutoButts(int interval = 0)
    {
        Timer t;

        if (interval == 0)
        {
            if (!_service.AutoButtTimers.TryRemove(ctx.Channel.Id, out t)) return;

            t.Change(Timeout.Infinite, Timeout.Infinite); //proper way to disable the timer
            await ReplyConfirmLocalizedAsync(strs.stopped).ConfigureAwait(false);
            return;
        }

        if (interval < 20)
            return;

        t = new(async state =>
        {
            try
            {
                await InternalButts(ctx.Channel).ConfigureAwait(false);
            }
            catch
            {
                // ignored
            }
        }, null, interval * 1000, interval * 1000);

        _service.AutoButtTimers.AddOrUpdate(ctx.Channel.Id, t, (key, old) =>
        {
            old.Change(Timeout.Infinite, Timeout.Infinite);
            return t;
        });

        await ReplyConfirmLocalizedAsync(strs.started(interval));
    }

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Hentai(params string[] tags) 
        => InternalDapiCommand(tags, true, _service.Hentai);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public async Task HentaiBomb(params string[] tags)
    {
        if (!_hentaiBombBlacklist.Add(ctx.Guild?.Id ?? ctx.User.Id))
            return;
        try
        {
            var images = await Task.WhenAll(_service.Yandere(ctx.Guild?.Id, true, tags),
                _service.Danbooru(ctx.Guild?.Id, true, tags),
                _service.Konachan(ctx.Guild?.Id, true, tags),
                _service.Gelbooru(ctx.Guild?.Id, true, tags));

            var linksEnum = images?.Where(l => l != null).ToArray();
            if (images is null || !linksEnum.Any())
            {
                await ReplyErrorLocalizedAsync(strs.no_results).ConfigureAwait(false);
                return;
            }

            await ctx.Channel.SendMessageAsync(string.Join("\n\n", linksEnum.Select(x => x.Url)))
                .ConfigureAwait(false);
        }
        finally
        {
            _hentaiBombBlacklist.TryRemove(ctx.Guild?.Id ?? ctx.User.Id);
        }
    }

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Yandere(params string[] tags)
        => InternalDapiCommand(tags, false, _service.Yandere);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Konachan(params string[] tags)
        => InternalDapiCommand(tags, false, _service.Konachan);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Sankaku(params string[] tags)
        => InternalDapiCommand(tags, false, _service.Sankaku);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task E621(params string[] tags)
        => InternalDapiCommand(tags, false, _service.E621);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Rule34(params string[] tags)
        => InternalDapiCommand(tags, false, _service.Rule34);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Danbooru(params string[] tags)
        => InternalDapiCommand(tags, false, _service.Danbooru);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Gelbooru(params string[] tags)
        => InternalDapiCommand(tags, false, _service.Gelbooru);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Derpibooru(params string[] tags)
        => InternalDapiCommand(tags, false, _service.DerpiBooru);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public Task Safebooru(params string[] tags)
        => InternalDapiCommand(tags, false, _service.SafeBooru);

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public async Task Boobs()
    {
        try
        {
            JToken obj;
            using (var http = _httpFactory.CreateClient())
            {
                obj = JArray.Parse(await http
                    .GetStringAsync($"http://api.oboobs.ru/boobs/{new NadekoRandom().Next(0, 12000)}")
                    .ConfigureAwait(false))[0];
            }

            await ctx.Channel.SendMessageAsync($"http://media.oboobs.ru/{obj["preview"]}").ConfigureAwait(false);
        }
        catch (Exception ex)
        {
            await SendErrorAsync(ex.Message).ConfigureAwait(false);
        }
    }

    [NadekoCommand, Aliases]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    public async Task Butts()
    {
        try
        {
            JToken obj;
            using (var http = _httpFactory.CreateClient())
            {
                obj = JArray.Parse(await http
                    .GetStringAsync($"http://api.obutts.ru/butts/{new NadekoRandom().Next(0, 6100)}")
                    .ConfigureAwait(false))[0];
            }

            await ctx.Channel.SendMessageAsync($"http://media.obutts.ru/{obj["preview"]}").ConfigureAwait(false);
        }
        catch (Exception ex)
        {
            await SendErrorAsync(ex.Message).ConfigureAwait(false);
        }
    }

    [NadekoCommand, Aliases]
    [RequireContext(ContextType.Guild)]
    [UserPerm(GuildPerm.ManageMessages)]
    public async Task NsfwTagBlacklist([Leftover] string tag = null)
    {
        if (string.IsNullOrWhiteSpace(tag))
        {
            var blTags = await _service.GetBlacklistedTags(ctx.Guild.Id);
            await SendConfirmAsync(GetText(strs.blacklisted_tag_list),
                blTags.Any()
                    ? string.Join(", ", blTags)
                    : "-").ConfigureAwait(false);
        }
        else
        {
            tag = tag.Trim().ToLowerInvariant();
            var added = await _service.ToggleBlacklistTag(ctx.Guild.Id, tag);

            if (added)
                await ReplyPendingLocalizedAsync(strs.blacklisted_tag_add(tag));
            else
                await ReplyPendingLocalizedAsync(strs.blacklisted_tag_remove(tag));
        }
    }

    [NadekoCommand, Aliases]
    [RequireContext(ContextType.Guild)]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    [Priority(1)]
    public async Task Nhentai(uint id)
    {
        var g = await _service.GetNhentaiByIdAsync(id);

        if (g is null)
        {
            await ReplyErrorLocalizedAsync(strs.not_found);
            return;
        }

        await SendNhentaiGalleryInternalAsync(g);
    }

    [NadekoCommand, Aliases]
    [RequireContext(ContextType.Guild)]
    [RequireNsfw(Group = "nsfw_or_dm"), RequireContext(ContextType.DM, Group = "nsfw_or_dm")]
    [Priority(0)]
    public async Task Nhentai([Leftover] string query)
    {
        var g = await _service.GetNhentaiBySearchAsync(query);

        if (g is null)
        {
            await ReplyErrorLocalizedAsync(strs.not_found);
            return;
        }

        await SendNhentaiGalleryInternalAsync(g);
    }

    private async Task SendNhentaiGalleryInternalAsync(Gallery g)
    {
        var count = 0;
        var tagString = g.Tags
            .Shuffle()
            .Select(tag => $"[{tag.Name}]({tag.Url})")
            .TakeWhile(tag => (count += tag.Length) < 1000)
            .Join(" ");

        var embed = _eb.Create()
            .WithTitle(g.Title)
            .WithDescription(g.FullTitle)
            .WithImageUrl(g.Thumbnail)
            .WithUrl(g.Url)
            .AddField(GetText(strs.favorites), g.Likes, true)
            .AddField(GetText(strs.pages), g.PageCount, true)
            .AddField(GetText(strs.tags), tagString, true)
            .WithFooter(g.UploadedAt.ToString("f"))
            .WithOkColor();

        await ctx.Channel.EmbedAsync(embed);
    }

    private async Task InternalDapiCommand(string[] tags,
        bool forceExplicit,
        Func<ulong?, bool, string[], Task<UrlReply>> func)
    {
        var data = await func(ctx.Guild?.Id, forceExplicit, tags);
            
        if (data is null || !string.IsNullOrWhiteSpace(data.Error))
        {
            await ReplyErrorLocalizedAsync(strs.no_results);
            return;
        }
        await ctx.Channel.EmbedAsync(_eb
            .Create(ctx)
            .WithOkColor()
            .WithImageUrl(data.Url)
            .WithDescription($"[link]({data.Url})")
            .WithFooter($"{data.Rating} ({data.Provider}) | {string.Join(" | ", data.Tags.Where(x => !string.IsNullOrWhiteSpace(x)).Take(5))}"));
    }
}