'use strict'
var helper = require('./test-helper')
var Client = helper.Client

var suite = new helper.Suite()

var conInfo = helper.config

function getConInfo (override) {
  return Object.assign({}, conInfo, override )
}

function getAppName (conf, cb) {
  var client = new Client(conf)
  client.connect(assert.success(function () {
    client.query('SHOW application_name', assert.success(function (res) {
      var appName = res.rows[0].application_name
      cb(appName)
      client.end()
    }))
  }))
}

suite.test('No default appliation_name ', function (done) {
  var conf = getConInfo()
  getAppName({ }, function (res) {
    assert.strictEqual(res, '')
    done()
  })
})

suite.test('fallback_application_name is used', function (done) {
  var fbAppName = 'this is my app'
  var conf = getConInfo({
    'fallback_application_name': fbAppName
  })
  getAppName(conf, function (res) {
    assert.strictEqual(res, fbAppName)
    done()
  })
})

suite.test('application_name is used', function (done) {
  var appName = 'some wired !@#$% application_name'
  var conf = getConInfo({
    'application_name': appName
  })
  getAppName(conf, function (res) {
    assert.strictEqual(res, appName)
    done()
  })
})

suite.test('application_name has precedence over fallback_application_name', function (done) {
  var appName = 'some wired !@#$% application_name'
  var fbAppName = 'some other strange $$test$$ appname'
  var conf = getConInfo({
    'application_name': appName,
    'fallback_application_name': fbAppName
  })
  getAppName(conf, function (res) {
    assert.strictEqual(res, appName)
    done()
  })
})

suite.test('application_name from connection string', function (done) {
  var appName = 'my app'
  var conParams = require(__dirname + '/../../../lib/connection-parameters')
  var conf
  if (process.argv[2]) {
    conf = new conParams(process.argv[2] + '?application_name=' + appName)
  } else {
    conf = 'postgres://?application_name=' + appName
  }
  getAppName(conf, function (res) {
    assert.strictEqual(res, appName)
    done()
  })
})

// TODO: make the test work for native client too
if (!helper.args.native) {
  suite.test('application_name is read from the env', function (done) {
    var appName = process.env.PGAPPNAME = 'testest'
    getAppName({ }, function (res) {
      delete process.env.PGAPPNAME
      assert.strictEqual(res, appName)
      done()
    })
  })
}