const fs = require('fs')
const path = require('path')
const mkdirp = require('mkdirp')
const { execSync } = require('child_process')
const open = require('open')

let xdgConfigHome = process.env.XDG_CONFIG_HOME
let systemdUserHome = process.env.SYSTEMD_USER_HOME

if (xdgConfigHome == null) {
  // Note: path.join() throws when arguments are null-ish.
  xdgConfigHome = path.join(process.env.HOME, '.config')
}

if (systemdUserHome == null) {
  systemdUserHome = path.join(xdgConfigHome, 'systemd', 'user')
}

const targetPath = path.join(systemdUserHome, 'oasis.service')

if (fs.existsSync(targetPath)) {
  console.log('Cowardly refusing to overwrite file:', targetPath)
} else {
  mkdirp(systemdUserHome)

  const sourcePath = path.join(__dirname, 'oasis.service')
  fs.copyFileSync(sourcePath, targetPath)

  execSync('systemctl --user daemon-reload')
  console.log('Service configuration has been installed to:', targetPath)
}

// Since this isn't in a post-install script we can enable, start, and open it.
execSync('systemctl --user enable oasis')
execSync('systemctl --user start oasis')
open('http://localhost:4515')