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

const channelID = '691824484230889546';

export default function memory(client: Client) {
  const set = new Set<string>();
  setInterval(async () => {
    try {
      const accounts = await client.db.Account.find();
      for (const acc of accounts) {
        if (acc.root === true) continue;
        // memory in bytes
        const mem = Number(await client.util.exec(`memory ${acc.username}`)) * 1000;
        // memory in megabytes
        const memoryConversion = mem / 1024 / 1024;
        const userLimits: { soft?: number, hard?: number } = {};
        // @ts-ignore
        const tier: Tiers = await client.db.Tier.findOne({ id: acc.tier }).lean().exec();
        userLimits.soft = acc.ramLimitNotification;
        userLimits.hard = tier.resourceLimits.ram;
        if ((memoryConversion <= userLimits.soft) && (acc.ramLimitNotification !== 0)) {
          set.delete(acc.username);
        }
        /* if the user has exceeded their soft memory limit, which is the one described in the
          resource limit guidelines, we'll inform staff.
        */
        if ((memoryConversion >= userLimits.hard) && set.has(acc.username)) {
          client.signale.info(`RAM Hard Limit Reached | ${acc.username} | ${memoryConversion}/${userLimits.hard} MB`);
          client.util.exec(`killall -9 -u ${acc.username}`);
          const embed = new RichEmbed();
          embed.setTitle('Resource Enforcement Notification');
          embed.setDescription('Someone has reached the (hard) resource limit for their tier on RAM. The system has automatically killed all of their processes.');
          embed.addField('User', `${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', `${String(userLimits.hard)} MB`, true);
          client.createMessage(channelID, { embed });
          client.util.createModerationLog(acc.userID, client.guilds.get('446067825673633794').members.get(client.user.id), 1, `You have exceeded your resource limit of '${String(userLimits.hard)} MB'. Any process running on your user account has been sent a STOP/KILL signal. If you have any questions, please contact a Technician.`);
          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 Technician. Please get the underlying issue resolved to avoid <i>possible</i> moderative action.</p>
          <p><strong>Reason:</strong> You have exceeded your resource limit of '${String(userLimits.hard)} MB'. Any process running on your user account has been sent a STOP/KILL signal. If you have any questions, please contact a Technician.</p>
          <p><strong>Moderator:</strong> SYSTEM</p>
  
          <b><i>Library of Code sp-us | Support Team</i></b>
          `,
          });
          client.createMessage(channelID, { embed });
          set.delete(acc.username);
        } else if ((memoryConversion >= userLimits.soft) && !set.has(acc.username)) {
          client.signale.info(`RAM Soft Limit Reached | ${acc.username} | ${memoryConversion}/${userLimits.soft} MB`);
          const embed = new RichEmbed();
          if (client.users.get(acc.userID)) embed.setThumbnail(client.users.get(acc.userID).avatarURL);
          embed.setTitle('Resource Limit Notification');
          embed.setDescription('Someone has reached the (soft) resource limit for their tier on RAM.');
          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', `${String(userLimits.hard)} MB`, true);
          embed.setFooter(client.user.username, client.user.avatarURL);
          embed.setTimestamp();
          if (acc.ramLimitNotification !== 0) {
            await client.createMessage(channelID, { embed });
          }
          if ((memoryConversion >= acc.ramLimitNotification) && (acc.ramLimitNotification !== 0)) {
            const notifyEmbed = new RichEmbed()
              .setTitle('Cloud Account | Notification')
              .setDescription(`You are about to reach your RAM resource limits, you are currently using '${String(Math.round(memoryConversion))} MB' and your limit is '${String(userLimits.hard)} MB'. Please correct your usage to avoid further action.\nYou can set your notification preferences by running \`=limits set-ram-notification <preferred ram threshold in MB>\`, you can disable these notifications by running \`=limits set-ram-notification -1\`.`)
              .addField('User', `${acc.username} | <@${acc.userID}>`, true)
              .addField('Technician', 'SYSTEM', true)
              .setFooter(client.user.username, client.user.avatarURL)
              .setTimestamp();
            client.getDMChannel(acc.userID).then((channel) => {
              channel.createMessage({ embed: notifyEmbed });
            });
            client.util.transport.sendMail({
              to: acc.emailAddress,
              from: 'Library of Code sp-us | Cloud Services <help@libraryofcode.org>',
              subject: 'Account Notification',
              html: `
            <h1>Library of Code sp-us | Cloud Services</h1>
            <p>You are about to reach your RAM resource limits, you are currently using '${String(memoryConversion)} MB' and your limit is '${String(userLimits.hard)} MB'. Please correct your usage to avoid further action.</p>
            <p><strong>Technician:</strong> SYSTEM</p>
    
            <b><i>Library of Code sp-us | Support Team</i></b>
            `,
            });
            client.createMessage('580950455581147146', { embed: notifyEmbed });
          }
          set.add(acc.username);
        }
      }
    } catch (err) {
      client.util.handleError(err);
    }
  }, 60000);
}