import { Message, ChatInputApplicationCommandData, Guild, ChatInputCommandInteraction, EmbedBuilder, ApplicationCommandOptionType, ChannelType } from "discord.js";
import { client, lavalinkManager } from "../index";
import { Command } from "../types/Command";
import { GuildPlayer } from "../classes/GuildPlayer";
import { getTextChannelAndMsg } from "../utils/music/Channel";
import { Logger } from "../utils/Logger";

/** join 명령어 */
export default class implements Command {
  /** 해당 명령어 설명 */
  name = "join";
  visible = true;
  aliases: string[] = [];
  description: string = "음성채널 참가";
  metaData: ChatInputApplicationCommandData = {
    name: this.name,
    description: this.description,
    options: [
      {
        type: ApplicationCommandOptionType.Channel,
        name: "channel",
        description: "등록할 채널 (선택)",
        channel_types: [ChannelType.GuildVoice],
      },
      {
        type: ApplicationCommandOptionType.String,
        name: "channel_id",
        description: "채널 ID 또는 #멘션 (선택)",
      },
    ]
  };

  /** 실행되는 부분 */
  async slashRun(interaction: ChatInputCommandInteraction) {
    const channel = interaction.options.getChannel("channel");
    const channelId = interaction.options.getString("channel_id");
    await interaction.editReply({ embeds: [ (await channelJoin(interaction.guild, channel?.id || channelId)).embed ] });
    return;
  }
  async messageRun(message: Message) {
    if (message.channel?.type !== ChannelType.GuildText) return;
    return;
    // return await message.channel.send({ content: "예시 명령어" }).then(m => client.msgDelete(m, 5));
  }
}

export async function channelJoin(guild: Guild | null, voiceChannelId: string | null): Promise<{
  embed: EmbedBuilder;
  player?: GuildPlayer;
}> {
  if (!guild) return { embed: client.mkembed({
    title: "guild를 가져올수 없습니다.",
    color: "DarkRed",
  }) };
  const { channel, msg, reason } = await getTextChannelAndMsg(guild);
  if (reason || !channel || !msg) return { embed: client.mkembed({
    title: reason ?? "오류발생",
    color: "DarkRed",
  }) };

  if (!voiceChannelId) return { embed: client.mkembed({
    title: "채널 아이디 가져오기 오류",
    color: "DarkRed",
  }) };
  const voiceChannel = guild.channels.cache.get(voiceChannelId.replace(/\<|\#|\!|\>/g,"").trim());
  if (!voiceChannel?.id) return { embed: client.mkembed({
    title: `${voiceChannelId} 채널 가져오기 오류`,
    color: "DarkRed",
  }) };
  if (voiceChannel.type !== ChannelType.GuildVoice) return { embed: client.mkembed({
    title: `<#${voiceChannelId}> 음성 채널이 아닙니다.`,
    color: "DarkRed",
  }) };
  
  let player = lavalinkManager.getPlayer(guild.id);
  if (player) return { embed: client.mkembed({ title: `이미 <#${player.voiceChannelId}> 참가중입니다.` }), player };

  // 연결 가능한 Lavalink 노드가 없으면 joinVoiceChannel이 throw 되어 unhandledRejection으로 번짐.
  // 노드 미연결 시 사용자에게 안내만 하고 종료.
  if (!lavalinkManager.hasReadyNode()) {
    return { embed: client.mkembed({
      title: "음악 서버에 연결할 수 없습니다.",
      description: "잠시 후 다시 시도해주세요.",
      color: "DarkRed",
    }) };
  }

  let voicePlayer;
  try {
    voicePlayer = await lavalinkManager.shoukaku.joinVoiceChannel({
      guildId: guild.id,
      channelId: voiceChannel.id,
      shardId: guild.shardId,
      deaf: true,
      mute: false,
    });
  } catch (err) {
    Logger.error(`[channelJoin] 음성채널 참가 실패: ${String(err)}`);
    return { embed: client.mkembed({
      title: "음성채널 참가에 실패했습니다.",
      description: "잠시 후 다시 시도해주세요.",
      color: "DarkRed",
    }) };
  }

  player = new GuildPlayer(
    guild,
    voicePlayer,
    voiceChannel.id,
    channel,
    msg,
  );
  lavalinkManager.addPlayer(guild.id, player);
  return { embed: client.mkembed({
    title: `<#${voiceChannelId}> 참가 완료`,
  }), player };
}