using Celeste.Mod.CelesteNet.DataTypes;
using Mono.Cecil;
using Mono.Cecil.Cil;
using MonoMod.Utils;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Celeste.Mod.CelesteNet.Server.Chat {
    public clast ChatCMDJoin : ChatCMDChannel {

        public override string Info => $"Alias for {Chat.Settings.CommandPrefix}{Chat.Commands.Get().ID}";


    public clast ChatCMDChannel : ChatCMD {

        public override string Args => "[page] | [channel]";

        public override string Info => "Switch to a different channel.";
        public override string Help =>
$@"Switch to a different channel.
To list all public channels, {Chat.Settings.CommandPrefix}{ID}
To create / join a public channel, {Chat.Settings.CommandPrefix}{ID} channel
To create / join a private channel, {Chat.Settings.CommandPrefix}{ID} {Channels.PrefixPrivate}channel
To go back to the default channel, {Chat.Settings.CommandPrefix}{ID} {Chat.Server.Channels.Default.Name}";

        public override void ParseAndRun(ChatCMDEnv env) {
            CelesteNetPlayerSession? session = env.Session;
            if (session == null)

            Channels channels = env.Server.Channels;

            Channel? c;

            if (int.TryParse(env.Text, out int page) ||
                string.IsNullOrWhiteSpace(env.Text)) {

                if (channels.All.Count == 0) {
                    env.Send($"No channels. See {Chat.Settings.CommandPrefix}{ID} on how to create one.");

                const int pageSize = 8;

                StringBuilder builder = new();

                int pages = (int) Math.Ceiling(channels.All.Count / (float) pageSize);
                if (page < 0 || pages