'use strict';

module.exports.install = function (opts, cb) {
  var fs = require('fs');
  var path = require('path');
  var service = '/etc/systemd/system/greenlock.service';
  var rwDirs = [ '/etc/greenlock', '/srv/www', '/var/log/greenlock', '/opt/greenlock' ];

  fs.readFile(path.join(__dirname, '../dist', service), 'utf8', function (e, text) {
    if (e) { throw e; }

    text = text
      .replace(/MY_DESC/g, opts.description || 'Greenlock Secure Web Server')
      .replace(/MY_DOCS/g, opts.homepage || 'https://git.coolaj86.com/coolaj86/greenlock-cli.js')
      .replace(/MY_GREENLOCK_PATH/g, opts.greenlockPath || '/opt/greenlock')
      .replace(/MY_CONFIG_PATH/g, opts.greenlockPath || '/etc/greenlock/greenlock.yml')
      .replace(/MY_USER/g, opts.user || 'greenlock')
      .replace(/MY_GROUP/g, opts.user || 'greenlock')
      .replace(/MY_RW_DIRS/g, (opts.writableDirs || rwDirs).join(' '))
      ;
    fs.writeFile(service, text, 'utf8', function (e) {
      if (e) { throw e; }

      console.log("Now reload configs and enable to start on boot:");
      console.log("");
      console.log("\tsudo systemctl daemon-reload");
      console.log("\tsudo systemctl enable greenlock");
      cb(null);
    });
  });
};