#!/usr/bin/env node

// Packages
const fs = require('fs-promise');
const minimist = require('minimist');
const chalk = require('chalk');
const opn = require('opn');

// Ours
const Now = require('../lib');
const login = require('../lib/login');
const cfg = require('../lib/cfg');
const { handleError, error } = require('../lib/error');
const logo = require('../lib/utils/output/logo');

const argv = minimist(process.argv.slice(2), {
  string: ['config', 'token'],
  boolean: ['help', 'debug'],
  alias: {
    help: 'h',
    config: 'c',
    debug: 'd',
    token: 't'
  }
});

const help = () => {
  console.log(
    `
  ${chalk.bold(`${logo} now open`)}

  ${chalk.dim('Options:')}

    -h, --help              Output usage information
    -c ${chalk.bold.underline('FILE')}, --config=${chalk.bold.underline('FILE')}  Config file
    -d, --debug             Debug mode [off]
    -t ${chalk.bold.underline('TOKEN')}, --token=${chalk.bold.underline('TOKEN')} Login token

  ${chalk.dim('Examples:')}

  ${chalk.gray('–')} Open latest deployment for current project

    ${chalk.cyan('$ now open')}

`
  );
};

if (argv.help) {
  help();
  process.exit(0);
}

const app = argv._[0];

// Options
const debug = argv.debug;
const apiUrl = argv.url || 'https://api.zeit.co';

if (argv.config) {
  cfg.setConfigFile(argv.config);
}

const config = cfg.read();

Promise.resolve(argv.token || config.token || login(apiUrl))
  .then(async token => {
    try {
      await open(token);
    } catch (err) {
      error(`Unknown error: ${err}\n${err.stack}`);
      process.exit(1);
    }
  })
  .catch(e => {
    error(`Authentication error – ${e.message}`);
    process.exit(1);
  });

async function open(token) {
  const now = new Now(apiUrl, token, { debug });

  let deployments;
  try {
    deployments = await now.list(app);
  } catch (err) {
    handleError(err);
    process.exit(1);
  }

  now.close();

  const apps = new Map();

  for (const dep of deployments) {
    const deps = apps.get(dep.name) || [];
    apps.set(dep.name, deps.concat(dep));
  }

  let pkg;
  try {
    const json = await fs.readFile('package.json');
    pkg = JSON.parse(json);
  } catch (err) {
    pkg = {};
  }

  const [currentProjectDeployments] = await getCurrentProjectDeployments(
    [...apps],
    pkg
  );

  if (typeof currentProjectDeployments === 'undefined') {
    console.log(`no deployments found for ${chalk.bold(pkg.name)}`);
    process.exit(0);
  }

  const sorted = await sortByCreation([...currentProjectDeployments]);
  const latestDeploy = sorted[0];

  try {
    const url = `https://${latestDeploy.url}`;

    console.log(`Opening the latest deployment for ${chalk.bold(pkg.name)}...`);
    console.log(`Here's the URL: ${chalk.underline(url)}`);

    opn(url);
    process.exit(0);
  } catch (err) {
    error(`Unknown error: ${err}\n${err.stack}`);
    process.exit(1);
  }
}

async function getCurrentProjectDeployments(apps, pkg) {
  return apps.filter(app => pkg.name === app[0]).map(app => app[1]);
}

async function sortByCreation(deps) {
  return deps.sort((depA, depB) => {
    return depB.created - depA.created;
  });
}