const User = require('./User');
const Collection = require('../util/Collection');
const ClientUserSettings = require('./ClientUserSettings');
const ClientUserGuildSettings = require('./ClientUserGuildSettings');
const Constants = require('../util/Constants');
const Util = require('../util/Util');
const Guild = require('./Guild');
const Message = require('./Message');
const GroupDMChannel = require('./GroupDMChannel');
const { TypeError } = require('../errors');

/**
 * Represents the logged in client's Discord user.
 * @extends {User}
 */
class ClientUser extends User {
  setup(data) {
    super.setup(data);

    /**
     * Whether or not this account has been verified
     * @type {boolean}
     */
    this.verified = data.verified;

    /**
     * The email of this account
     * @type {string}
     */
    this.email = data.email;
    this.localPresence = {};
    this._typing = new Map();

    /**
     * A Collection of friends for the logged in user
     * <warn>This is only filled when using a user account.</warn>
     * @type {Collection<Snowflake, User>}
     */
    this.friends = new Collection();

    /**
     * A Collection of blocked users for the logged in user
     * <warn>This is only filled when using a user account.</warn>
     * @type {Collection<Snowflake, User>}
     */
    this.blocked = new Collection();

    /**
     * A Collection of notes for the logged in user
     * <warn>This is only filled when using a user account.</warn>
     * @type {Collection<Snowflake, string>}
     */
    this.notes = new Collection();

    /**
     * If the user has Discord premium (nitro)
     * <warn>This is only filled when using a user account.</warn>
     * @type {?boolean}
     */
    this.premium = typeof data.premium === 'boolean' ? data.premium : null;

    /**
     * If the user has MFA enabled on their account
     * <warn>This is only filled when using a user account.</warn>
     * @type {?boolean}
     */
    this.mfaEnabled = typeof data.mfa_enabled === 'boolean' ? data.mfa_enabled : null;

    /**
     * If the user has ever used a mobile device on Discord
     * <warn>This is only filled when using a user account.</warn>
     * @type {?boolean}
     */
    this.mobile = typeof data.mobile === 'boolean' ? data.mobile : null;

    /**
     * Various settings for this user
     * <warn>This is only filled when using a user account.</warn>
     * @type {?ClientUserSettings}
     */
    this.settings = data.user_settings ? new ClientUserSettings(this, data.user_settings) : null;

    /**
     * All of the user's guild settings
     * @type {Collection<Snowflake, ClientUserGuildSettings>}
     * <warn>This is only filled when using a user account</warn>
     */
    this.guildSettings = new Collection();
    if (data.user_guild_settings) {
      for (const settings of data.user_guild_settings) {
        settings.client = this.client;
        const guild = this.client.guilds.get(settings.guild_id);
        this.guildSettings.set(settings.guild_id, new ClientUserGuildSettings(settings, guild));
      }
    }
  }

  edit(data, password) {
    const _data = {};
    _data.username = data.username || this.username;
    _data.avatar = this.client.resolver.resolveBase64(data.avatar);

    if (!this.bot) {
      _data.email = data.email || this.email;
      _data.password = password;
      if (data.new_password) _data.new_password = data.newPassword;
    }

    return this.client.api.users('@me').patch({ data })
      .then(newData => this.client.actions.UserUpdate.handle(newData).updated);
  }

  /**
   * Set the username of the logged in client.
   * <info>Changing usernames in Discord is heavily rate limited, with only 2 requests
   * every hour. Use this sparingly!</info>
   * @param {string} username The new username
   * @param {string} [password] Current password (only for user accounts)
   * @returns {Promise<ClientUser>}
   * @example
   * // Set username
   * client.user.setUsername('discordjs')
   *  .then(user => console.log(`My new username is ${user.username}`))
   *  .catch(console.error);
   */
  setUsername(username, password) {
    return this.edit({ username }, password);
  }

  /**
   * Changes the email for the client user's account.
   * <warn>This is only available when using a user account.</warn>
   * @param {string} email New email to change to
   * @param {string} password Current password
   * @returns {Promise<ClientUser>}
   * @example
   * // Set email
   * client.user.setEmail('bob@gmail.com', 'some amazing password 123')
   *  .then(user => console.log(`My new email is ${user.email}`))
   *  .catch(console.error);
   */
  setEmail(email, password) {
    return this.edit({ email }, password);
  }

  /**
   * Changes the password for the client user's account.
   * <warn>This is only available when using a user account.</warn>
   * @param {string} newPassword New password to change to
   * @param {string} oldPassword Current password
   * @returns {Promise<ClientUser>}
   * @example
   * // Set password
   * client.user.setPassword('some new amazing password 456', 'some amazing password 123')
   *  .then(user => console.log('New password set!'))
   *  .catch(console.error);
   */
  setPassword(newPassword, oldPassword) {
    return this.edit({ password: newPassword }, oldPassword);
  }

  /**
   * Set the avatar of the logged in client.
   * @param {BufferResolvable|Base64Resolvable} avatar The new avatar
   * @returns {Promise<ClientUser>}
   * @example
   * // Set avatar
   * client.user.setAvatar('./avatar.png')
   *  .then(user => console.log(`New avatar set!`))
   *  .catch(console.error);
   */
  setAvatar(avatar) {
    if (typeof avatar === 'string' && avatar.startsWith('data:')) {
      return this.edit({ avatar });
    } else {
      return this.client.resolver.resolveBuffer(avatar || Buffer.alloc(0))
        .then(data => this.edit({ avatar: this.client.resolver.resolveBase64(data) || null }));
    }
  }

  /**
   * Data resembling a raw Discord presence.
   * @typedef {Object} PresenceData
   * @property {PresenceStatus} [status] Status of the user
   * @property {boolean} [afk] Whether the user is AFK
   * @property {Object} [game] Game the user is playing
   * @property {string} [game.name] Name of the game
   * @property {string} [game.url] Twitch stream URL
   */

  /**
   * Sets the full presence of the client user.
   * @param {PresenceData} data Data for the presence
   * @returns {Promise<ClientUser>}
   */
  setPresence(data) {
    // {"op":3,"d":{"status":"dnd","since":0,"game":null,"afk":false}}
    return new Promise(resolve => {
      let status = this.localPresence.status || this.presence.status;
      let game = this.localPresence.game;
      let afk = this.localPresence.afk || this.presence.afk;

      if (!game && this.presence.game) {
        game = {
          name: this.presence.game.name,
          type: this.presence.game.type,
          url: this.presence.game.url,
        };
      }

      if (data.status) {
        if (typeof data.status !== 'string') throw new TypeError('STATUS_TYPE');
        if (this.bot) {
          status = data.status;
        } else {
          this.settings.update(Constants.UserSettingsMap.status, data.status);
          status = 'invisible';
        }
      }

      if (data.game) {
        game = data.game;
        if (game.url) game.type = 1;
      } else if (typeof data.game !== 'undefined') {
        game = null;
      }

      if (typeof data.afk !== 'undefined') afk = data.afk;
      afk = Boolean(afk);

      this.localPresence = { status, game, afk };
      this.localPresence.since = 0;
      this.localPresence.game = this.localPresence.game || null;

      this.client.ws.send({
        op: 3,
        d: this.localPresence,
      });

      this.client._setPresence(this.id, this.localPresence);

      resolve(this);
    });
  }

  /**
   * A user's status. Must be one of:
   * - `online`
   * - `idle`
   * - `invisible`
   * - `dnd` (do not disturb)
   * @typedef {string} PresenceStatus
   */

  /**
   * Sets the status of the client user.
   * @param {PresenceStatus} status Status to change to
   * @returns {Promise<ClientUser>}
   */
  setStatus(status) {
    return this.setPresence({ status });
  }

  /**
   * Sets the game the client user is playing.
   * @param {?string} game Game being played
   * @param {string} [streamingURL] Twitch stream URL
   * @returns {Promise<ClientUser>}
   */
  setGame(game, streamingURL) {
    if (!game) return this.setPresence({ game: null });
    return this.setPresence({
      game: {
        name: game,
        url: streamingURL,
      },
    });
  }

  /**
   * Sets/removes the AFK flag for the client user.
   * @param {boolean} afk Whether or not the user is AFK
   * @returns {Promise<ClientUser>}
   */
  setAFK(afk) {
    return this.setPresence({ afk });
  }

  /**
   * Fetches messages that mentioned the client's user.
   * @param {Object} [options] Options for the fetch
   * @param {number} [options.limit=25] Maximum number of mentions to retrieve
   * @param {boolean} [options.roles=true] Whether to include role mentions
   * @param {boolean} [options.everyone=true] Whether to include everyone/here mentions
   * @param {Guild|Snowflake} [options.guild] Limit the search to a specific guild
   * @returns {Promise<Message[]>}
   */
  fetchMentions(options = {}) {
    if (options.guild instanceof Guild) options.guild = options.guild.id;
    Util.mergeDefault({ limit: 25, roles: true, everyone: true, guild: null }, options);

    return this.client.api.users('@me').mentions.get({ query: options })
      .then(data => data.map(m => new Message(this.client.channels.get(m.channel_id), m, this.client)));
  }

  /**
   * Creates a guild.
   * <warn>This is only available when using a user account.</warn>
   * @param {string} name The name of the guild
   * @param {Object} [options] Options for the creating
   * @param {string} [options.region] The region for the server, defaults to the closest one available
   * @param {BufferResolvable|Base64Resolvable} [options.icon=null] The icon for the guild
   * @returns {Promise<Guild>} The guild that was created
   */
  createGuild(name, { region, icon = null } = {}) {
    if (!icon || (typeof icon === 'string' && icon.startsWith('data:'))) {
      return new Promise((resolve, reject) =>
        this.client.api.guilds.post({ data: { name, region, icon } })
          .then(data => {
            if (this.client.guilds.has(data.id)) return resolve(this.client.guilds.get(data.id));

            const handleGuild = guild => {
              if (guild.id === data.id) {
                this.client.removeListener(Constants.Events.GUILD_CREATE, handleGuild);
                this.client.clearTimeout(timeout);
                resolve(guild);
              }
            };
            this.client.on(Constants.Events.GUILD_CREATE, handleGuild);

            const timeout = this.client.setTimeout(() => {
              this.client.removeListener(Constants.Events.GUILD_CREATE, handleGuild);
              resolve(this.client.dataManager.newGuild(data));
            }, 10000);
            return undefined;
          }, reject)
      );
    } else {
      return this.client.resolver.resolveBuffer(icon)
        .then(data => this.createGuild(name, { region, icon: this.client.resolver.resolveBase64(data) || null }));
    }
  }

  /**
   * An object containing either a user or access token, and an optional nickname.
   * @typedef {Object} GroupDMRecipientOptions
   * @property {UserResolvable} [user] User to add to the Group DM
   * @property {string} [accessToken] Access token to use to add a user to the Group DM
   * (only available if a bot is creating the DM)
   * @property {string} [nick] Permanent nickname (only available if a bot is creating the DM)
   * @property {string} [id] If no user resolveable is provided and you want to assign nicknames
   * you must provide user ids instead
   */

  /**
   * Creates a Group DM.
   * @param {GroupDMRecipientOptions[]} recipients The recipients
   * @returns {Promise<GroupDMChannel>}
   */
  createGroupDM(recipients) {
    const data = this.bot ? {
      access_tokens: recipients.map(u => u.accessToken),
      nicks: recipients.reduce((o, r) => {
        if (r.nick) o[r.user ? r.user.id : r.id] = r.nick;
        return o;
      }, {}),
    } : { recipients: recipients.map(u => this.client.resolver.resolveUserID(u.user || u.id)) };
    return this.client.api.users('@me').channels.post({ data })
      .then(res => new GroupDMChannel(this.client, res));
  }
}

module.exports = ClientUser;