using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.VisualBasic;
using NetCord;
using NetCord.Gateway;
using NetCord.Hosting.Gateway;
using NetCord.Hosting.Services;
using NetCord.Hosting.Services.ApplicationCommands;
using NetCord.Hosting.Services.ComponentInteractions;
using NetCord.Rest;
using NetCord.Services.ApplicationCommands;
using NetCord.Services.ComponentInteractions;
using System.ComponentModel;
using System.Diagnostics;
using System.Linq;

public static class Program
{
    public static void Main(string[] args)
    {
        var builder = Host.CreateApplicationBuilder(args);

        builder.Services
            .AddDiscordGateway(options =>
            {
                options.Intents = GatewayIntents.Guilds | GatewayIntents.GuildUsers | GatewayIntents.GuildEmojisAndStickers;
            })
            .AddApplicationCommands()
            .AddComponentInteractions<ButtonInteraction, ButtonInteractionContext>();

        var host = builder.Build();

        var configuration = host.Services.GetRequiredService<IConfiguration>();

        //configuration["Discord:Token"] = Environment.GetEnvironmentVariable("BOT_TOKEN");

        host.AddModules(typeof(Program).Assembly);

        host.RunAsync().GetAwaiter().GetResult();
    }
}

public class SlashCommands(GatewayClient client) : ApplicationCommandModule<ApplicationCommandContext>
{
    private ulong GuildId => GetGuildId() ?? throw new InvalidOperationException("Command cannot be used outside of a server.");

    [SlashCommand("randomuser", "Get a random user from the server")]
    public async Task<string> GetRandomUserCommand()
    {
        await Context.Interaction.SendResponseAsync(InteractionCallback.DeferredMessage());
        var randomUser = await GetRandomUserFromGuild();

        if (randomUser == null)
        {
            return $"Found no users :(";
        }

        return $"Here's a random user: {randomUser.Username}";
    }

    [SlashCommand("getroles", "Get all roles on the server")]
    public async Task GetRolesCommand()
    {
        await Context.Interaction.SendResponseAsync(InteractionCallback.DeferredMessage());

        var roles = await GetRolesFromGuild();

        roles = [.. roles.Where(role => !role.Name.StartsWith('@'))];

        if (roles.Count == 0)
        {
            await Context.Interaction.ModifyResponseAsync(message => message.WithContent($"Found no roles :("));
        }

        await Context.Interaction.ModifyResponseAsync(message => message.WithContent($"Roles in the server:\n{String.Join("\n", roles.Select(role => $"- {role.Id}: {role.Name}"))}"));
    }

    [SlashCommand("giveroletoallusers", "Give role to all users on the server")]
    public async Task GiveRoleToAllUsersCommand(string roleId)
    {
        await Context.Interaction.SendResponseAsync(InteractionCallback.DeferredMessage());

        var parsed = ulong.TryParse(roleId, out ulong roleIdParsed);
        if (!parsed)
        {
            await Context.Interaction.ModifyResponseAsync(message => message.WithContent("Invalid roleId"));
        }

        _ = GiveRoleToAllUsers(roleIdParsed);
    }

    [SlashCommand("removerolefromallusers", "Remove role from all users on the server")]
    public async Task RemoveRoleFromAllUsersCommand(string roleId)
    {
        await Context.Interaction.SendResponseAsync(InteractionCallback.DeferredMessage());

        var parsed = ulong.TryParse(roleId, out ulong roleIdParsed);
        if (!parsed)
        {
            await Context.Interaction.ModifyResponseAsync(message => message.WithContent("Invalid roleId"));
            return;
        }

        await RemoveRoleFromAllUsers(roleIdParsed);

        await Context.Interaction.ModifyResponseAsync(message => message.WithContent("Done."));
    }

    [SlashCommand("defer", "Defer")]
    public async Task DeferCommand()
    {
        await Context.Interaction.SendResponseAsync(InteractionCallback.DeferredMessage());

        Thread.Sleep(2000);

        await Context.Interaction.ModifyResponseAsync(message => message.WithContent("Sup"));

        Thread.Sleep(1000);

        await Context.Interaction.ModifyResponseAsync(message => message.WithContent("Sup bitches"));
    }

    //[SlashCommand("button", "Gives a button")]
    //public async Task ButtonCommand()
    //{
    //    await Context.Interaction.SendResponseAsync(InteractionCallback.DeferredMessage());

    //    var emojis = await client.Rest.GetGuildEmojisAsync(GuildId);

    //    EmojiProperties? emoji = null;
    //    if (emojis.Count > 0)
    //    {
    //        emoji = EmojiProperties.Custom(emojis[new Random().Next(emojis.Count)].Id);
    //    }

    //    var button = new ButtonProperties(TestButtonId, "Click Me!", emoji!, ButtonStyle.Primary);

    //    var component = new ActionRowProperties([button]);

    //    await Context.Interaction.ModifyResponseAsync(message => message.WithContent("Here's a button").WithComponents([component]));
    //}

    [SlashCommand("button", "Gives a button")]
    public async Task ButtonCommand()
    {
        await Context.Interaction.SendResponseAsync(InteractionCallback.DeferredMessage());

        var emojis = await client.Rest.GetGuildEmojisAsync(GuildId);

        EmojiProperties? emoji = null;
        if (emojis.Count > 0)
        {
            emoji = EmojiProperties.Custom(emojis[new Random().Next(emojis.Count)].Id);
        }

        var button = new ButtonProperties("testButton", "Click Me!", emoji!, ButtonStyle.Primary);

        var component = new ActionRowProperties([button]);

        await Context.Interaction.ModifyResponseAsync(message => message.WithContent("Here's a button").WithComponents([component]));
    }

    private ulong? GetGuildId()
    {
        return Context.Guild?.Id;
    }

    private async Task<GuildUser?> GetRandomUserFromGuild()
    {
        var users = await GetAllUsersFromGuild();

        var index = new Random().Next(users.Count);
        return users[index];
    }

    private async Task<List<GuildUser>> GetAllUsersFromGuild()
    {
        var users = await client.Rest.GetGuildUsersAsync(GuildId).ToListAsync();
        if (users == null)
        {
            return [];
        }

        return users;
    }

    private async Task<List<Role>> GetRolesFromGuild()
    {
        var roles = (await client.Rest.GetGuildRolesAsync(GuildId)).ToList();
        return roles;
    }

    private async Task GiveRoleToAllUsers(ulong roleId)
    {
        var users = await GetAllUsersFromGuild();

        int total = users.Count;
        await Context.Interaction.ModifyResponseAsync(message => message.WithContent($"Applying role for {users.Count} users."));

        int count = 0;
        foreach (var user in users)
        {
            count++;
            if (user.RoleIds.Contains(roleId))
            {
                Console.WriteLine($"{count}/{total} User already has role, skipping. {user.Username} ({user.Id})");
                continue;
            }
            
            for (int i = 0; i < 3; i++)
            {
                try
                {
                    await client.Rest.AddGuildUserRoleAsync(GuildId, user.Id, roleId);
                    Console.WriteLine($"{count}/{total} Applied role to user {user.Username} ({user.Id})");
                    break;
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"{count}/{total} Failed to apply role to user {user.Username} ({user.Id}). Try {i}/3. Error:");
                    Console.WriteLine(ex);
                    await Task.Delay(800);
                }
            }

            await Task.Delay(800);
        }
    }

    private async Task RemoveRoleFromAllUsers(ulong roleId)
    {
        var users = await GetAllUsersFromGuild();

        foreach (var user in users)
        {
            if (!user.RoleIds.Contains(roleId))
            {
                continue;
            }

            await client.Rest.RemoveGuildUserRoleAsync(GuildId, user.Id, roleId);
        }
    }
}

public class ButtonCommands : ComponentInteractionModule<ButtonInteractionContext>
{
    [ComponentInteraction("testButton")]
    public async Task RespondToTestButton()
    {
        await Context.Interaction.SendResponseAsync(InteractionCallback.DeferredMessage());

        await Context.Message.ModifyAsync(message => message.WithContent($"{Context.Message.Content}a"));

        await Context.Interaction.ModifyResponseAsync(message => message.WithContent("Clicked!"));
    }
}