import { randomBytes } from 'crypto';
import { Message, TextChannel } from 'eris';
import { Client, Command, LocalStorage } from '../class';

export default class StoreMessages extends Command {
  constructor(client: Client) {
    super(client);
    this.name = 'storemessages';
    this.description = 'Fetches 1000 messages from the specified channel and stores them in a HTML file.';
    this.usage = `${this.client.config.prefix}storemessages <channel> [member ID]`;
    this.aliases = ['sm'];
    this.permissions = 3;
    this.guildOnly = true;
    this.enabled = true;
  }

  public async run(message: Message, args: string[]) {
    try {
      if (!args[0]) return this.client.commands.get('help').run(message, [this.name]);
      const check = this.client.util.resolveGuildChannel(args[0], this.mainGuild, false);
      if (!check || check.type !== 0) return this.error(message.channel, 'The channel you specified either doesn\'t exist or isn\'t a textable guild channel.');
      const chan = <TextChannel> this.mainGuild.channels.get(check.id);
      const loadingMessage = await this.loading(message.channel, 'Fetching messages...');
      let messages = await chan.getMessages(10000);
      if (args[1]) {
        messages = messages.filter((m) => m.author.id === args[1]);
      }
      let html = `<h3>Library of Code sp-us</h3><strong>Channel:</strong> ${chan.name} (${chan.id})<br><strong>Generated by:</strong> ${message.author.username}#${message.author.discriminator}<br><strong>Generated at:</strong> ${new Date().toLocaleString('en-us')}<br><br>`;
      for (const msg of messages) {
        html += `(<i>${new Date(msg.timestamp).toLocaleString('en-us')}</i>) [<strong>${msg.author.username}#${msg.author.discriminator} - ${msg.author.id}</strong>]: ${msg.cleanContent}<br>`;
      }
      message.delete();
      const identifier = randomBytes(10).toString('hex');

      const comp = await LocalStorage.compress(html);
      const file = new this.client.db.File({
        name: `${chan.name}-${new Date().toLocaleString('en-us')}.html.gz`,
        identifier,
        mimeType: 'application/gzip',
        data: comp,
        downloaded: 0,
        maxDownloads: 1,
      });
      await file.save();
      loadingMessage.delete();
      this.client.getDMChannel(message.author.id).then((c) => c.createMessage(`https://loc.sh/m/${identifier}.html.gz`)).catch(() => this.error(message.channel, 'Could not send a DM to you.'));
      return this.success(message.channel, `Fetched messages for <#${chan.id}>. Check your DMs for link to access.`);
    } catch (err) {
      return this.client.util.handleError(err, message, this);
    }
  }
}