import {
  Plugin,
  Configurable,
  EventListener,
  DependencyLoad
} from '@squeebot/core/lib/plugin';

import { logger } from '@squeebot/core/lib/core';

import Twitter from 'twitter-lite';
import { IMessage } from '@squeebot/core/lib/types';
import { sanitizeEscapedText } from '@squeebot/core/lib/common';

interface TwitterUser {
  id: number;
  name: string;
  screen_name: string;
  description: string;
  followers_count: number;
  statuses_count: number;
}

interface TwitterTweet {
  id: number;
  full_text: string;
  text?: string;
  user: TwitterUser;
  retweet_count: number;
  favorite_count: number;
}

@Configurable({
  consumer_key: null,
  consumer_secret: null,
  access_token_key: null,
  access_token_secret: null,
})
class TwitterURLPlugin extends Plugin {
  public twitter: Twitter | null = null;
  public me: TwitterUser | null = null;

  @EventListener('pluginUnload')
  public unloadEventHandler(plugin: string | Plugin): void {
    if (plugin === this.name || plugin === this) {
      this.emit('pluginUnloaded', this);
    }
  }

  async handleTweet(data: TwitterTweet, msg: IMessage): Promise<boolean> {
    const keys = [];
    const end = sanitizeEscapedText(data.text || data.full_text);

    keys.push(['field', 'Twitter', { color: 'cyan', type: 'title' }]);
    keys.push(['field', data.favorite_count.toString(), { color: 'red', label: ['♥', 'Likes'], type: 'metric' }]);
    keys.push(['field', data.retweet_count.toString(), { color: 'green', label: ['↱↲', 'Retweets'], type: 'metric' }]);
    keys.push(['bold', '@' + data.user.screen_name + ':']);
    keys.push(['field', end, { type: 'content' }]);

    msg.resolve(keys);
    return true;
  }

  async getStatusById(id: string): Promise<any> {
    if (!this.twitter) {
      return null;
    }
    return this.twitter.get('statuses/show', {id, tweet_mode: 'extended'});
  }

  async twitterURLHandler(url: URL, msg: IMessage): Promise<boolean> {
    const det = url.href.match(/\/\w+\/status\/(\d+[^&#?\s/])/i);
    if (!det) {
      return false;
    }

    try {
      const tweet = await this.getStatusById(det[1]);
      if (tweet) {
        return this.handleTweet(tweet as TwitterTweet, msg);
      }
    } catch (e) {
      msg.resolve('No such tweet!');
    }
    return false;
  }

  @DependencyLoad('urlreply')
  addURLHandler(urlreply: any): void {
    urlreply.registerHandler(this.name, 'twitter.com/', (url: URL, msg: IMessage) => {
      return this.twitterURLHandler(url, msg);
    });

    urlreply.registerHandler(this.name, 'nitter.net/', (url: URL, msg: IMessage) => {
      return this.twitterURLHandler(url, msg);
    });
  }

  initialize(): void {
    const consumerKey = this.config.get('consumer_key');
    const consumerSecret = this.config.get('consumer_secret');
    const accessToken = this.config.get('access_token_key');
    const accessTokenSecret = this.config.get('access_token_secret');

    if (!consumerKey || !consumerSecret || !accessToken || !accessTokenSecret) {
      logger.error('[%s] Twitter credentials missing!', this.name);
      return;
    }

    this.twitter = new Twitter({
      consumer_key: consumerKey,
      consumer_secret: consumerSecret,
      access_token_key: accessToken,
      access_token_secret: accessTokenSecret,
    });

    this.twitter.get('account/verify_credentials').then((data: TwitterUser) => {
      this.me = data;
    }, (err) => {
      logger.error('[%s] Twitter threw an error!', this.name, err.stack);
    });
  }
}

module.exports = TwitterURLPlugin;