'use strict'
const helper = require('../test-helper')
const assert = require('assert')
const ConnectionParameters = require('../../../lib/connection-parameters')
const defaults = require('../../../lib').defaults
const dns = require('dns')

// clear process.env
for (var key in process.env) {
  delete process.env[key]
}

const suite = new helper.Suite()

suite.test('ConnectionParameters construction', function () {
  assert.ok(new ConnectionParameters(), 'with null config')
  assert.ok(new ConnectionParameters({ user: 'asdf' }), 'with config object')
  assert.ok(new ConnectionParameters('postgres://localhost/postgres'), 'with connection string')
})

var compare = function (actual, expected, type) {
  const expectedDatabase = expected.database === undefined ? expected.user : expected.database

  assert.equal(actual.user, expected.user, type + ' user')
  assert.equal(actual.database, expectedDatabase, type + ' database')
  assert.equal(actual.port, expected.port, type + ' port')
  assert.equal(actual.host, expected.host, type + ' host')
  assert.equal(actual.password, expected.password, type + ' password')
  assert.equal(actual.binary, expected.binary, type + ' binary')
  assert.equal(actual.statement_timeout, expected.statement_timeout, type + ' statement_timeout')
  assert.equal(actual.options, expected.options, type + ' options')
  assert.equal(
    actual.idle_in_transaction_session_timeout,
    expected.idle_in_transaction_session_timeout,
    type + ' idle_in_transaction_session_timeout'
  )
}

suite.test('ConnectionParameters initializing from defaults', function () {
  var subject = new ConnectionParameters()
  compare(subject, defaults, 'defaults')
  assert.ok(subject.isDomainSocket === false)
})

suite.test('ConnectionParameters initializing from defaults with connectionString set', function () {
  var config = {
    user: 'brians-are-the-best',
    database: 'scoobysnacks',
    port: 7777,
    password: 'mypassword',
    host: 'foo.bar.net',
    binary: defaults.binary,
    statement_timeout: false,
    idle_in_transaction_session_timeout: false,
    options: '-c geqo=off',
  }

  var original_value = defaults.connectionString
  // Just changing this here doesn't actually work because it's no longer in scope when viewed inside of
  // of ConnectionParameters() so we have to pass in the defaults explicitly to test it
  defaults.connectionString =
    'postgres://brians-are-the-best:mypassword@foo.bar.net:7777/scoobysnacks?options=-c geqo=off'
  var subject = new ConnectionParameters(defaults)
  defaults.connectionString = original_value
  compare(subject, config, 'defaults-connectionString')
})

suite.test('ConnectionParameters initializing from config', function () {
  var config = {
    user: 'brian',
    database: 'home',
    port: 7777,
    password: 'pizza',
    binary: true,
    encoding: 'utf8',
    host: 'yo',
    ssl: {
      asdf: 'blah',
    },
    statement_timeout: 15000,
    idle_in_transaction_session_timeout: 15000,
    options: '-c geqo=off',
  }
  var subject = new ConnectionParameters(config)
  compare(subject, config, 'config')
  assert.ok(subject.isDomainSocket === false)
})

suite.test('ConnectionParameters initializing from config and config.connectionString', function () {
  var subject1 = new ConnectionParameters({
    connectionString: 'postgres://test@host/db',
  })
  var subject2 = new ConnectionParameters({
    connectionString: 'postgres://test@host/db?ssl=1',
  })
  var subject3 = new ConnectionParameters({
    connectionString: 'postgres://test@host/db',
    ssl: true,
  })
  var subject4 = new ConnectionParameters({
    connectionString: 'postgres://test@host/db?ssl=1',
    ssl: false,
  })

  assert.equal(subject1.ssl, false)
  assert.equal(subject2.ssl, true)
  assert.equal(subject3.ssl, true)
  assert.equal(subject4.ssl, true)
})

suite.test('escape spaces if present', function () {
  var subject = new ConnectionParameters('postgres://localhost/post gres')
  assert.equal(subject.database, 'post gres')
})

suite.test('do not double escape spaces', function () {
  var subject = new ConnectionParameters('postgres://localhost/post%20gres')
  assert.equal(subject.database, 'post gres')
})

var checkForPart = function (array, part) {
  assert.ok(array.indexOf(part) > -1, array.join(' ') + ' did not contain ' + part)
}

const getDNSHost = async function (host) {
  return new Promise((resolve, reject) => {
    dns.lookup(host, (err, addresses) => {
      err ? reject(err) : resolve(addresses)
    })
  })
}

suite.testAsync('builds simple string', async function () {
  var config = {
    user: 'brian',
    password: 'xyz',
    port: 888,
    host: 'localhost',
    database: 'bam',
  }
  var subject = new ConnectionParameters(config)
  const dnsHost = await getDNSHost(config.host)
  return new Promise((resolve) => {
    subject.getLibpqConnectionString(function (err, constring) {
      assert(!err)
      var parts = constring.split(' ')
      checkForPart(parts, "user='brian'")
      checkForPart(parts, "password='xyz'")
      checkForPart(parts, "port='888'")
      checkForPart(parts, `hostaddr='${dnsHost}'`)
      checkForPart(parts, "dbname='bam'")
      resolve()
    })
  })
})

suite.test('builds dns string', async function () {
  var config = {
    user: 'brian',
    password: 'asdf',
    port: 5432,
    host: 'localhost',
  }
  var subject = new ConnectionParameters(config)
  const dnsHost = await getDNSHost(config.host)
  return new Promise((resolve) => {
    subject.getLibpqConnectionString(function (err, constring) {
      assert(!err)
      var parts = constring.split(' ')
      checkForPart(parts, "user='brian'")
      checkForPart(parts, `hostaddr='${dnsHost}'`)
      resolve()
    })
  })
})

suite.test('error when dns fails', function () {
  var config = {
    user: 'brian',
    password: 'asf',
    port: 5432,
    host: 'asdlfkjasldfkksfd#!$!!!!..com',
  }
  var subject = new ConnectionParameters(config)
  subject.getLibpqConnectionString(
    assert.calls(function (err, constring) {
      assert.ok(err)
      assert.isNull(constring)
    })
  )
})

suite.test('connecting to unix domain socket', function () {
  var config = {
    user: 'brian',
    password: 'asf',
    port: 5432,
    host: '/tmp/',
  }
  var subject = new ConnectionParameters(config)
  subject.getLibpqConnectionString(
    assert.calls(function (err, constring) {
      assert(!err)
      var parts = constring.split(' ')
      checkForPart(parts, "user='brian'")
      checkForPart(parts, "host='/tmp/'")
    })
  )
})

suite.test('config contains quotes and backslashes', function () {
  var config = {
    user: 'not\\brian',
    password: "bad'chars",
    port: 5432,
    host: '/tmp/',
  }
  var subject = new ConnectionParameters(config)
  subject.getLibpqConnectionString(
    assert.calls(function (err, constring) {
      assert(!err)
      var parts = constring.split(' ')
      checkForPart(parts, "user='not\\\\brian'")
      checkForPart(parts, "password='bad\\'chars'")
    })
  )
})

suite.test('encoding can be specified by config', function () {
  var config = {
    client_encoding: 'utf-8',
  }
  var subject = new ConnectionParameters(config)
  subject.getLibpqConnectionString(
    assert.calls(function (err, constring) {
      assert(!err)
      var parts = constring.split(' ')
      checkForPart(parts, "client_encoding='utf-8'")
    })
  )
})

suite.test('password contains  < and/or >  characters', function () {
  var sourceConfig = {
    user: 'brian',
    password: 'hello<ther>e',
    port: 5432,
    host: 'localhost',
    database: 'postgres',
  }
  var connectionString =
    'postgres://' +
    sourceConfig.user +
    ':' +
    sourceConfig.password +
    '@' +
    sourceConfig.host +
    ':' +
    sourceConfig.port +
    '/' +
    sourceConfig.database
  var subject = new ConnectionParameters(connectionString)
  assert.equal(subject.password, sourceConfig.password)
})

suite.test('username or password contains weird characters', function () {
  var defaults = require('../../../lib/defaults')
  defaults.ssl = true
  var strang = 'pg://my f%irst name:is&%awesome!@localhost:9000'
  var subject = new ConnectionParameters(strang)
  assert.equal(subject.user, 'my f%irst name')
  assert.equal(subject.password, 'is&%awesome!')
  assert.equal(subject.host, 'localhost')
  assert.equal(subject.ssl, true)
})

suite.test('url is properly encoded', function () {
  var encoded = 'pg://bi%25na%25%25ry%20:s%40f%23@localhost/%20u%2520rl'
  var subject = new ConnectionParameters(encoded)
  assert.equal(subject.user, 'bi%na%%ry ')
  assert.equal(subject.password, 's@f#')
  assert.equal(subject.host, 'localhost')
  assert.equal(subject.database, ' u%20rl')
})

suite.test('ssl is set on client', function () {
  var Client = require('../../../lib/client')
  var defaults = require('../../../lib/defaults')
  defaults.ssl = true
  var c = new Client('postgres://user@password:host/database')
  assert(c.ssl, 'Client should have ssl enabled via defaults')
})

suite.test('coercing string "true" to boolean', function () {
  const subject = new ConnectionParameters({ ssl: 'true' })
  assert.strictEqual(subject.ssl, true)
})

suite.test('ssl is set on client', function () {
  var sourceConfig = {
    user: 'brian',
    password: 'hello<ther>e',
    port: 5432,
    host: 'localhost',
    database: 'postgres',
    ssl: {
      sslmode: 'verify-ca',
      sslca: '/path/ca.pem',
      sslkey: '/path/cert.key',
      sslcert: '/path/cert.crt',
      sslrootcert: '/path/root.crt',
    },
  }
  var Client = require('../../../lib/client')
  var defaults = require('../../../lib/defaults')
  defaults.ssl = true
  var c = new ConnectionParameters(sourceConfig)
  c.getLibpqConnectionString(
    assert.calls(function (err, pgCString) {
      assert(!err)
      assert.equal(
        pgCString.indexOf("sslrootcert='/path/root.crt'") !== -1,
        true,
        'libpqConnectionString should contain sslrootcert'
      )
    })
  )
})
