#!/usr/bin/env node

import minimist from 'minimist';
// import chalk from 'chalk';
// import ms from 'ms';
// import table from 'text-table';
import NowAlias from '../lib/alias';
import login from '../lib/login';
import * as cfg from '../lib/cfg';
import { error } from '../lib/error';

const argv = minimist(process.argv.slice(2));
const subcommand = argv._[0];

// options
const help = () => {
  console.log(`
  𝚫 now alias <ls | set | rm> <now_url> <alias> [≤alias2>[, <alias3>]]

  Alias: ln

  Options:

    -h, --help   output usage information
    -d, --debug  Debug mode [off]

  Examples:
    Lists all the aliases you have configured:

      $ now alias ls

    Adds a particular alias to my-api.now.sh:
      $ now alias set api-ownv3nc9f8.now.sh my-api.now.sh

      The \`.now.sh\` suffix can be ommited:

      $ now alias set api-ownv3nc9f8 my-api

      The deployment id can be used as the source:

      $ now alias set deploymentId my-alias

      Custom domains work as well. They will ask you for your email
      address as we dynamically provision a certificate:

      $ now alias set api-ownv3nc9f8.now.sh my-api.com

      You can optionally put \`http://\` or \`https://\` in front of the
      parameters and they will be ignored.

    Removing an alias:
      $ now alias rm aliasId

      To get the list of alias ids, use \`now alias ls\`.
`);
};

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

if (!subcommand) {
  error('No subcommand specified');
  help();
  process.exit(1);
}

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

const config = cfg.read();

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

function getArgs (args) {
  return { url: args[1], aliases: args.slice(2) };
}

async function run (token) {
  const alias = new NowAlias(apiUrl, token, { debug });
  const { url, aliases } = getArgs(argv._);

  if ('ls' !== subcommand) {
    if (!url) {
      error('No deployment url specified. You can see active deployments with `now ls`.');
      help();
      process.exit(1);
    } else if (!aliases.length) {
      error('No alias url specified. This is the URL your deployment will be tied to.');
    }
  }

  switch (subcommand) {
    case 'ls':
      alias.ls(url);
      break;
    case 'rm':
      alias.rm(url, aliases);
      break;
    case 'set':
      alias.set(url, aliases);
      break;
    default:
      error('Invalid subcommand');
      help();
      process.exit();
  }
}