const Structures = require('../util/Structures');
const DataResolver = require('../util/DataResolver');

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

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

    this._typing = new Map();

    /**
     * If the bot's {@link ClientApplication#owner Owner} has MFA enabled on their account
     * @type {?boolean}
     */
    this.mfaEnabled = typeof data.mfa_enabled === 'boolean' ? data.mfa_enabled : null;

    if (data.token) this.client.token = data.token;
  }

  /**
   * ClientUser's presence
   * @readonly
   * @type {Presence}
   */
  get presence() {
    return this.client.presence;
  }

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

  /**
   * Sets 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
   * @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) {
    return this.edit({ username });
  }

  /**
   * Sets 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);
   */
  async setAvatar(avatar) {
    return this.edit({ avatar: await DataResolver.resolveImage(avatar) });
  }

  /**
   * 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} [activity] Activity the user is playing
   * @property {Object|string} [activity.application] An application object or application id
   * @property {string} [activity.application.id] The id of the application
   * @property {string} [activity.name] Name of the activity
   * @property {ActivityType|number} [activity.type] Type of the activity
   * @property {string} [activity.url] Stream url
   */

  /**
   * Sets the full presence of the client user.
   * @param {PresenceData} data Data for the presence
   * @returns {Promise<Presence>}
   * @example
   * // Set the client user's presence
   * client.user.setPresence({ activity: { name: 'with discord.js' }, status: 'idle' })
   *   .then(console.log)
   *   .catch(console.error);
   */
  setPresence(data) {
    return this.client.presence.set(data);
  }

  /**
   * 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<Presence>}
   * @example
   * // Set the client user's status
   * client.user.setStatus('idle')
   *   .then(console.log)
   *   .catch(console.error);
   */
  setStatus(status) {
    return this.setPresence({ status });
  }

  /**
   * Options for setting an activity
   * @typedef ActivityOptions
   * @type {Object}
   * @property {string} [url] Twitch stream URL
   * @property {ActivityType|number} [type] Type of the activity
   */

  /**
   * Sets the activity the client user is playing.
   * @param {string|ActivityOptions} [name] Activity being played, or options for setting the activity
   * @param {ActivityOptions} [options] Options for setting the activity
   * @returns {Promise<Presence>}
   * @example
   * // Set the client user's activity
   * client.user.setActivity('discord.js', { type: 'WATCHING' })
   *   .then(presence => console.log(`Activity set to ${presence.activity.name}`))
   *   .catch(console.error);
   */
  setActivity(name, options = {}) {
    if (!name) return this.setPresence({ activity: null });

    const activity = Object.assign({}, options, typeof name === 'object' ? name : { name });
    return this.setPresence({ activity });
  }

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

  /**
   * 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 resolvable 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>}
   * @example
   * // Create a Group DM with a token provided from OAuth
   * client.user.createGroupDM([{
   *   user: '66564597481480192',
   *   accessToken: token
   * }])
   *   .then(console.log)
   *   .catch(console.error);
   */
  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.users.resolveID(u.user || u.id)) };
    return this.client.api.users('@me').channels.post({ data })
      .then(res => this.client.channels.add(res));
  }
}

module.exports = ClientUser;