#!/usr/bin/env node

import fs from 'fs-promise';
import minimist from 'minimist';
import chalk from 'chalk';
import table from 'text-table';
import ms from 'ms';
import Now from '../lib';
import login from '../lib/login';
import * as cfg from '../lib/cfg';
import { handleError, error } from '../lib/error';

const argv = minimist(process.argv.slice(2));
const help = () => {
  console.log(`
  𝚫 now list [app]

  Alias: ls

  Options:

    -h, --help   output usage information
    -d, --debug  Debug mode [off]
`);
};

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

const app = argv._[0];

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

const config = cfg.read();

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

async function list (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));
  }

  const sorted = await sort([...apps]);

  const current = Date.now();
  const text = sorted.map(([name, deps]) => {
    const t = table(deps.map(({ uid, url, created }) => {
      const time = chalk.gray(ms(current - created) + ' ago');
      return [ uid, time, `https://${url}` ];
    }), { align: ['l', 'r', 'l'], hsep: ' '.repeat(6) });
    return chalk.bold(name) + '\n\n' + indent(t, 2);
  }).join('\n\n');

  if (text) console.log('\n' + text + '\n');
}

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

  return apps
  .map(([name, deps]) => {
    deps = deps.slice().sort((a, b) => {
      return b.created - a.created;
    });
    return [name, deps];
  })
  .sort(([nameA, depsA], [nameB, depsB]) => {
    if (pkg.name === nameA) return -1;
    if (pkg.name === nameB) return 1;
    return depsB[0].created - depsA[0].created;
  });
}

function indent (text, n) {
  return text.split('\n').map((l) => ' '.repeat(n) + l).join('\n');
}