conveyal/modeify

var config = require('../config')
var debug = require('debug')(config.name() + ':request')
var nocache = require('./superagent-no-cache')
var prefix = require('superagent-prefix')(config.api_url())
var superagent = require('superagent')

/**
 * Expose `get`
 */

module.exports.get = function (url, params, callback) {
  if (arguments.length === 2) {
    callback = params
    params = null
  }

  var name = 'GET ' + url
  debug('--> %s', name)
  return superagent
    .get(url)
    .accept('json')
    .use(prefix)
    .use(nocache)
    .use(auth)
    .query(params)
    .end(response(name, callback))
}

/**
 * Expose `post`
 */

module.exports.post = function (url, data, callback) {
  var name = 'POST ' + url
  debug('--> %s', name)
  return superagent
    .post(url)
    .accept('json')
    .use(prefix)
    .use(nocache)
    .use(auth)
    .send(data)
    .end(response(name, callback))
}

/**
 * Expose `del`
 */

module.exports.del = function (url, callback) {
  var name = 'DELETE ' + url
  debug('--> %s', name)
  return superagent
    .del(url)
    .accept('json')
    .use(prefix)
    .use(nocache)
    .use(auth)
    .end(response(name, callback))
}

let bearer

function auth (request) {
  if (bearer) {
    request.set('Authorization', `bearer ${bearer}`)
  }
}

module.exports.setAuthHeader = function (token) {
  bearer = token
}

/**
 * Response
 */

function response (name, callback) {
  var called = false
  callback = callback || function () {}
  return function (err, res) {
    if (!called) {
      called = true
      debug('<-- %s > %s', name, err || res.error || res.status)
      callback(err || res.error, res)
    } else {
      debug('<-- %s called more than once > %s', name, err || res.error || res.status)
    }
  }
}