const Docker = require('dockerode');

const names = ['redis', 'nats', 'postgres'];

if (!names.includes(process.argv[2])) process.exit(1);

const data = {
  redis: {
    port: '6379',
    image: process.env.IMAGE_NAME || 'redis:5-alpine',
    name: 'redis',
  },
  nats: {
    port: '4222',
    image: process.env.IMAGE_NAME || 'nats:1.4.1-linux',
    name: 'nats',
  },
  postgres: {
    port: '5432',
    image: process.env.IMAGE_NAME || 'postgres:9.6.11-alpine',
    name: 'postgres',
    password: process.env.POSTGRES_PASSWORD || '12345678'
  },
};

(async () => {
  const host = process.env.DOCKER_HOST;

  let dockerOptions;
  if (host) dockerOptions = { host };
  const docker = new Docker(dockerOptions || { socketPath: '/var/run/docker.sock' });

  const params = data[process.argv[2]];

  const stage = process.argv[3];
  if (!stage) throw new Error('Env stage does not specified as argument.');

  const containerName = `fixpoint.${stage}.${params.name}`;
  const containersList = await docker.listContainers({ all: true });
  let container = containersList.find(container => container.Names.includes(`/${containerName}`));

  let Env = [];
  if (params.name === 'postgres') {
    Env = [`POSTGRES_PASSWORD=${params.password}`];
  }

  try {
    if (!container) {
      container = await docker.createContainer({
        name: containerName,
        Image: params.image,
        AttachStdin: false,
        AttachStdout: true,
        AttachStderr: true,
        HostConfig: {
          PortBindings: {
            [`${params.port}/tcp`]: [{
              'HostPort': '0',
            }],
          },
        },
        Env
      });
      await container.start();
    } else if (!container.Status.includes('Up')) {
      container = docker.getContainer(containerName);
      await container.start();
    }
    const { NetworkSettings: networkSettings } = await docker.getContainer(containerName).inspect();
    const json = JSON.stringify({ port: networkSettings.Ports[`${params.port}/tcp`][0].HostPort });
    console.log(json);
  } catch (err) {
    console.log(err.stack);
    process.exit(1);
  }
})();