'use strict';

const Action = require('./Action');
const { Events } = require('../../util/Constants');
const { PartialTypes } = require('../../util/Constants');

class PresenceUpdateAction extends Action {
  handle(data) {
    let user = this.client.users.cache.get(data.user.id);
    if (!user && data.user?.username) user = this.client.users._add(data.user);
    if (!user && ('username' in data.user || this.client.options.partials.includes(PartialTypes.USER))) {
      user = this.client.users._add(data.user);
    }
    if (!user) return;

    if (data.user?.username) {
      if (!user._equals(data.user)) this.client.actions.UserUpdate.handle(data.user);
    }

    const guild = this.client.guilds.cache.get(data.guild_id);

    if (guild) {
      let member = guild.members.cache.get(user.id);
      if (!member && data.status !== 'offline') {
        member = guild.members._add({
          user,
          deaf: false,
          mute: false,
        });
        this.client.emit(Events.GUILD_MEMBER_AVAILABLE, member);
      }
    }

    const oldPresence = (guild || this.client).presences.cache.get(user.id)?._clone() ?? null;

    const newPresence = (guild || this.client).presences._add(Object.assign(data, { guild }));

    if (this.client.listenerCount(Events.PRESENCE_UPDATE) && !newPresence.equals(oldPresence)) {
      /**
       * Emitted whenever a guild member's presence (e.g. status, activity) is changed.
       * @event Client#presenceUpdate
       * @param {?Presence} oldPresence The presence before the update, if one at all
       * @param {Presence} newPresence The presence after the update
       */
      this.client.emit(Events.PRESENCE_UPDATE, oldPresence, newPresence);
    }
  }
}

module.exports = PresenceUpdateAction;
