#!/usr/bin/env node

var { exec } = require('./utils/exec');
var fs = require('fs');

async function buildDockerImages() {
  console.log("[BOOTSTRAP] Building required Docker images...");

  console.log('Build authelia-example-backend docker image.')
  await exec('docker build -t authelia-example-backend example/compose/nginx/backend');

  console.log('Build authelia-duo-api docker image.')
  await exec('docker build -t authelia-duo-api example/compose/duo-api');
}

async function checkHostsFile() {
  async function checkAndFixEntry(entries, domain, ip) {
    const foundEntry = entries.filter(l => l[1] == domain);
    if (foundEntry.length > 0) {
      if (foundEntry[0][0] == ip) {
        // The entry exists and is correct.
        return;
      }
      else {
        // We need to remove the entry and replace it.
        console.log(`Update entry for ${domain}.`);
        await exec(`cat /etc/hosts | grep -v "${domain}" | /usr/bin/sudo tee /etc/hosts > /dev/null`);
        await exec(`echo "${ip} ${domain}" | /usr/bin/sudo tee -a /etc/hosts > /dev/null`); 
      }
    }
    else {
      // We need to add the new entry.
      console.log(`Add entry for ${domain}.`);
      await exec(`echo "${ip} ${domain}" | /usr/bin/sudo tee -a /etc/hosts > /dev/null`);
    }
  }

  console.log("[BOOTSTRAP] Checking if example.com domain is forwarded to your machine...");
  const actualEntries = fs.readFileSync("/etc/hosts").toString("utf-8")
    .split("\n").filter(l => l !== '').map(l => l.split(" ").filter(w => w !== ''));

  await checkAndFixEntry(actualEntries, 'login.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'admin.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'singlefactor.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'dev.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'home.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'mx1.mail.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'mx2.mail.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'public.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'secure.example.com', '127.0.0.1');
  await checkAndFixEntry(actualEntries, 'mail.example.com', '127.0.0.1');

  await checkAndFixEntry(actualEntries, 'duo.example.com', '192.168.240.100');
}

async function checkKubernetesDependencies() {
  console.log("[BOOTSTRAP] Checking Kubernetes tools in /tmp to allow testing a Kube cluster... (no junk installed on host)");

  if (!fs.existsSync('/tmp/kind')) {
    console.log('Install Kind for spawning a Kubernetes cluster.');
    await exec('wget https://github.com/clems4ever/kind/releases/download/0.1.0-cmic1/kind-linux-amd64 -O /tmp/kind && chmod +x /tmp/kind');  
  }

  if (!fs.existsSync('/tmp/kubectl')) {
    console.log('Install Kubectl for interacting with Kubernetes.');
    await exec('wget https://storage.googleapis.com/kubernetes-release/release/v1.13.0/bin/linux/amd64/kubectl -O /tmp/kubectl && chmod +x /tmp/kubectl');
  }
}

async function main() {
  await checkHostsFile();
  await buildDockerImages();
  await checkKubernetesDependencies();
}

main().catch((err) => {
  console.error(err);
  process.exit(1);
})