import { Message } from 'eris';
import axios from 'axios';
import { Client, Command, RichEmbed } from '../class';

export default class Mdn extends Command {
  constructor(client: Client) {
    super(client);
    this.name = 'mdn';
    this.description = 'Get information from mdn about JavaScript.';
    this.usage = 'mdn <Object>[.property/.method]';
    this.permissions = 0;
    this.guildOnly = false;
    this.enabled = true;
    this.aliases = ['js'];
  }

  public async run(message: Message, args: string[]) {
    try {
      if (!args[0]) return this.error(message.channel, 'You need to specify an argument.');
      args[0] = args[0].replace('.', '.prototype.');
      args[0] = args[0].replace('#', '.prototype.');

      return axios.get(`https://mdn.pleb.xyz/search?q=${args[0]}`)
        .then((res) => {
          if (res.status !== 200 || res.statusText !== 'OK') return this.error(message.channel, 'Please try again later, something unexpected happened.');
          const { data } = res;
          if (!data.Title || !data.Summary || !data.URL) return this.error(message.channel, 'Could not find information. Try something else.');

          // Do not touch to the next block of code. Don't even look at it. your brain could stop working
          data.Summary = data.Summary.replace(/<code><strong>/g, '<strong><code>');
          data.Summary = data.Summary.replace(/<\/strong><\/code>/g, '</code></strong>');
          data.Summary = data.Summary.replace(/<code>/g, '`');
          data.Summary = data.Summary.replace(/<\/code>/g, '`');
          data.Summary = data.Summary.replace(/<strong>/g, '**');
          data.Summary = data.Summary.replace(/<\/strong>/g, '**');
          const url = data.Summary.match(/<a href=.*>/);
          if (url !== null) {
            url[0] = url[0].replace('<a href="', '');
            url[0] = url[0].replace('</a>', '');
            const name = url[0].match(/>.*/);
            name[0] = name[0].replace('>', '');
            url[0] = url[0].replace(/>.*/, '');
            url[0] = url[0].replace('"', '');
            const title = url[0].match(/title=".*"/);
            if (title !== null) url[0] = url[0].replace(title[0], '');
            data.Summary = data.Summary.replace(/<a href=.*>/, `[${name[0]}](https://developer.mozilla.org${url[0]})`);
          }

          const embed = new RichEmbed();
          embed.setAuthor('Mozilla Developer Network', 'https://i.imgur.com/DFGXabG.png', 'https://developer.mozilla.org/en-US');
          embed.setTitle(data.Title);
          embed.setDescription(data.Summary);
          embed.setURL(`developer.mozilla.org${data.URL}`);
          embed.setColor(0x066fad);
          embed.setFooter(this.client.user.username, this.client.user.avatarURL);
          embed.setTimestamp();
          return message.channel.createMessage({ embed });
        })
        .catch((err) => {
          this.client.util.handleError(err, message, this);
          this.error(message.channel, 'Please try again later, something unexpected happened.');
        });
    } catch (err) {
      return this.client.util.handleError(err, message, this);
    }
  }
}