using Catalogger.Backend.Cache.InMemoryCache;
using Catalogger.Backend.Database;
using Catalogger.Backend.Database.Queries;
using Catalogger.Backend.Extensions;
using Catalogger.Backend.Services;
using Remora.Discord.API.Abstractions.Gateway.Events;
using Remora.Discord.API.Abstractions.Objects;
using Remora.Discord.Extensions.Embeds;
using Remora.Discord.Gateway.Responders;
using Remora.Results;

namespace Catalogger.Backend.Bot.Responders.Channels;

public class ChannelCreateResponder(
    DatabaseContext db,
    RoleCache roleCache,
    ChannelCache channelCache,
    UserCache userCache,
    WebhookExecutorService webhookExecutor) : IResponder<IChannelCreate>
{
    public async Task<Result> RespondAsync(IChannelCreate ch, CancellationToken ct = default)
    {
        if (!ch.GuildID.IsDefined()) return Result.Success;
        channelCache.Set(ch);

        var builder = new EmbedBuilder()
            .WithTitle(ch.Type switch
            {
                ChannelType.GuildVoice => "Voice channel created",
                ChannelType.GuildCategory => "Category channel created",
                ChannelType.GuildAnnouncement or ChannelType.GuildText => "Text channel created",
                _ => "Channel created"
            })
            .WithColour(DiscordUtils.Green)
            .WithFooter($"ID: {ch.ID}");

        if (ch.ParentID.IsDefined(out var parentId))
        {
            builder.WithDescription(channelCache.TryGet(parentId.Value, out var parentChannel)
                ? $"**Name:** {ch.Name}\n**Category:** {parentChannel.Name}"
                : $"**Name:** {ch.Name}");
        }
        else builder.WithDescription($"**Name:** {ch.Name}");

        foreach (var overwrite in ch.PermissionOverwrites.OrDefault() ?? [])
        {
            if (overwrite.Type == PermissionOverwriteType.Role)
            {
                var roleName = roleCache.TryGet(overwrite.ID, out var role) ? role.Name : $"role {overwrite.ID}";
                var embedFieldValue = "";
                if (overwrite.Allow.GetPermissions().Count != 0)
                    embedFieldValue += $"\u2705 {overwrite.Allow.ToPrettyString()}";
                if (overwrite.Deny.GetPermissions().Count != 0)
                    embedFieldValue += $"\n\n\u274c {overwrite.Deny.ToPrettyString()}";

                builder.AddField($"Override for {roleName}", embedFieldValue.Trim());
            }
            else
            {
                var user = await userCache.GetUserAsync(overwrite.ID);
                var embedFieldValue = "";
                if (overwrite.Allow.GetPermissions().Count != 0)
                    embedFieldValue += $"\u2705 {overwrite.Allow.ToPrettyString()}";
                if (overwrite.Deny.GetPermissions().Count != 0)
                    embedFieldValue += $"\n\n\u274c {overwrite.Deny.ToPrettyString()}";

                builder.AddField($"Override for {user?.Tag() ?? $"user {overwrite.ID}"}", embedFieldValue.Trim());
            }
        }

        var guildConfig = await db.GetGuildAsync(ch.GuildID.Value, ct);
        webhookExecutor.QueueLog(guildConfig, LogChannelType.ChannelCreate, builder.Build().GetOrThrow());
        return Result.Success;
    }
}