#!/usr/bin/env node

// Packages
const fs = require('fs-promise')
const minimist = require('minimist')
const chalk = require('chalk')
const table = require('text-table')
const ms = require('ms')

// Ours
const strlen = require('../lib/strlen')
const indent = require('../lib/indent')
const Now = require('../lib')
const login = require('../lib/login')
const cfg = require('../lib/cfg')
const {handleError, error} = require('../lib/error')

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('𝚫 now list')} [app]

  ${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('–')} List all deployments

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

  ${chalk.gray('–')} List all deployments for the app ${chalk.dim('`my-app`')}

    ${chalk.cyan('$ now ls my-app')}

  ${chalk.dim('Alias:')} ls
`)
}

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 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})
  const start = new Date()

  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 _url = url ? chalk.underline(`https://${url}`) : 'incomplete'
      const time = chalk.gray(ms(current - created) + ' ago')
      return [uid, _url, time]
    }), {align: ['l', 'r', 'l'], hsep: ' '.repeat(6), stringLength: strlen})
    return chalk.bold(name) + '\n\n' + indent(t, 2)
  }).join('\n\n')

  const elapsed = ms(new Date() - start)
  console.log(`> ${deployments.length} deployment${deployments.length === 1 ? '' : 's'} found ${chalk.gray(`[${elapsed}]`)}`)

  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
  })
}