'use strict'

let cli = require('heroku-cli-util')
let co = require('co')

function * run (context, heroku) {
  const resolve = require('../../lib/resolve')

  let id = context.args.addon.split(':')[0]
  let addon = yield heroku.get(`/addon-services/${encodeURIComponent(id)}`).catch(() => null)
  if (!addon) addon = (yield resolve.addon(heroku, context.app, id)).addon_service
  let url = `https://devcenter.heroku.com/articles/${addon.name}`

  if (context.flags['show-url']) {
    cli.log(url)
  } else {
    cli.log(`Opening ${cli.color.cyan(url)}...`)
    yield cli.open(url)
  }
}

module.exports = {
  topic: 'addons',
  command: 'docs',
  wantsApp: true,
  needsAuth: true,
  args: [{ name: 'addon' }],
  flags: [{ name: 'show-url', description: 'show URL, do not open browser' }],
  run: cli.command({ preauth: true }, co.wrap(run)),
  description: "open an add-on's Dev Center documentation in your browser"
}