/* eslint-disable no-await-in-loop */
import { Client } from '..';
import { RichEmbed } from '../class';

const channelID = '691824484230889546';

export const memoryLimits = {
  TIER_1_SOFT: 250,
  TIER_1_HARD: 300,
  TIER_2_SOFT: 300,
  TIER_2_HARD: 350,
  TIER_3_SOFT: 450,
  TIER_3_HARD: 500,
};

export default async function memory(client: Client) {
  const accounts = await client.db.Account.find();
  for (const acc of accounts) {
    if (acc.root) return;
    // memory in bytes
    const mem = Number(await client.util.exec(`memory ${acc.username}`)) * 1000;
    // memory in megabytes
    const memoryConversion = mem / 1024 / 1024;
    let userLimits: { soft: number, hard: number };
    if (acc.tier === 1) {
      userLimits = { soft: memoryLimits.TIER_1_SOFT, hard: memoryLimits.TIER_1_HARD };
    } else if (acc.tier === 2) {
      userLimits = { soft: memoryLimits.TIER_2_SOFT, hard: memoryLimits.TIER_2_HARD };
    } else if (acc.tier === 3) {
      userLimits = { soft: memoryLimits.TIER_3_SOFT, hard: memoryLimits.TIER_3_HARD };
    }

    /* if the user has exceeded their soft memory limit, which is the one described in the
      resource limit guidelines, we'll inform staff.
    */
    if (acc.tier === 1 && memoryConversion >= userLimits.soft) {
      const embed = new RichEmbed();
      if (client.users.get(acc.userID)) embed.setThumbnail(client.users.get(acc.userID).avatarURL);
      embed.addField('User', `${acc.username} | <@${acc.userID}> | ${acc.userID}`, true);
      embed.addField('Tier', String(acc.tier), true);
      embed.addField('Memory Usage', `${String(memoryConversion)} MB`, true);
      embed.addField('Memory Limit', `${String(userLimits.soft)} MB`, true);
      embed.setFooter(client.user.username, client.user.avatarURL);
      embed.setTimestamp();

      // if they exceed the hard limit, we'll kill all of their processes.
      if (memoryConversion >= userLimits.hard) {
        client.util.exec(`killall -9 -u ${acc.username}`);
        embed.setTitle('Resource Enforcement Notification');
        embed.setDescription('Someone has reached the (hard) resource limit for their tier on RAM. The system has automatically killed all of their processes.');
        client.util.createModerationLog(acc.userID, client.guilds.get('446067825673633794').members.get(client.user.id), 1, '[AUTO] Exceeded resource limit for RAM.');
        client.util.transport.sendMail({
          to: acc.emailAddress,
          from: 'Library of Code sp-us | Cloud Services <help@libraryofcode.org>',
          subject: 'Your account has been warned',
          html: `
          <h1>Library of Code sp-us | Cloud Services</h1>
          <p>Your account has received an official warning from a Moderator. Please get the underlying issue resolved to avoid <i>possible</i> moderative action.</p>
          <p><strong>Reason:</strong> [AUTO] Exceeded resource limit for RAM.</p>
          <p><strong>Moderator:</strong> ${client.user.username}</p>
  
          <b><i>Library of Code sp-us | Support Team</i></b>
          `,
        });
      } else {
        embed.setTitle('Resource Limit Notification');
        embed.setDescription('Someone has reached the (soft) resource limit for their tier on RAM.');
      }
      // @ts-ignore
      client.createMessage(channelID, { embed });
    }
  }
}