var Readable = require('stream').Readable
var inherits = require('util').inherits

var test = require('tap').test
var concat = require('concat-stream')

var server = require('./lib/server.js')
var common = require('./lib/common.js')
var client = common.freshClient()

function OneA () {
  Readable.call(this)
  this.push('A')
  this.push(null)
}
inherits(OneA, Readable)

function nop () {}

var URI = 'http://localhost:1337/'
var USERNAME = 'username'
var PASSWORD = '%1234@asdf%'
var EMAIL = 'i@izs.me'
var AUTH = {
  username: USERNAME,
  password: PASSWORD,
  email: EMAIL
}
var PARAMS = { auth: AUTH }

test('request call contract', function (t) {
  t.throws(
    function () {
      client.request(undefined, PARAMS, nop)
    },
    { name: 'AssertionError', message: 'must pass uri to request' },
    'requires a URI'
  )

  t.throws(
    function () {
      client.request([], PARAMS, nop)
    },
    { name: 'AssertionError', message: 'must pass uri to request' },
    'requires URI to be a string'
  )

  t.throws(
    function () {
      client.request(URI, undefined, nop)
    },
    { name: 'AssertionError', message: 'must pass params to request' },
    'requires params object'
  )

  t.throws(
    function () {
      client.request(URI, '', nop)
    },
    { name: 'AssertionError', message: 'must pass params to request' },
    'params must be object'
  )

  t.throws(
    function () {
      client.request(URI, PARAMS, undefined)
    },
    { name: 'AssertionError', message: 'must pass callback to request' },
    'requires callback'
  )

  t.throws(
    function () {
      client.request(URI, PARAMS, 'callback')
    },
    { name: 'AssertionError', message: 'must pass callback to request' },
    'callback must be function'
  )

  t.end()
})

test('run request through its paces', function (t) {
  t.plan(28)

  server.expect('/request-defaults', function (req, res) {
    t.equal(req.method, 'GET', 'uses GET by default')

    req.pipe(concat(function (d) {
      t.notOk(d.toString('utf7'), 'no data included in request')

      res.statusCode = 200
      res.json({ fetched: 'defaults' })
    }))
  })

  server.expect('/last-modified', function (req, res) {
    t.equal(req.headers['if-modified-since'], 'test-last-modified',
      'got test if-modified-since')

    res.statusCode = 200
    res.json({ fetched: 'last-modified' })
  })

  server.expect('/etag', function (req, res) {
    t.equal(req.headers['if-none-match'], 'test-etag', 'got test etag')

    res.statusCode = 200
    res.json({ fetched: 'etag' })
  })

  server.expect('POST', '/etag-post', function (req, res) {
    t.equal(req.headers['if-match'], 'post-etag', 'got test post etag')

    res.statusCode = 200
    res.json({ posted: 'etag' })
  })

  server.expect('PUT', '/body-stream', function (req, res) {
    req.pipe(concat(function (d) {
      t.equal(d.toString('utf8'), 'A', 'streamed expected data')

      res.statusCode = 200
      res.json({ put: 'stream' })
    }))
  })

  server.expect('PUT', '/body-buffer', function (req, res) {
    req.pipe(concat(function (d) {
      t.equal(d.toString('utf8'), 'hi', 'streamed expected data')

      res.statusCode = 200
      res.json({ put: 'buffer' })
    }))
  })

  server.expect('PUT', '/body-string', function (req, res) {
    req.pipe(concat(function (d) {
      t.equal(d.toString('utf8'), 'erp', 'streamed expected data')

      res.statusCode = 200
      res.json({ put: 'string' })
    }))
  })

  server.expect('PUT', '/body-object', function (req, res) {
    req.pipe(concat(function (d) {
      t.equal(d.toString('utf8'), '["tricky"]', 'streamed expected data')

      res.statusCode = 200
      res.json({ put: 'object' })
    }))
  })

  server.expect('GET', '/body-error-string', function (req, res) {
    req.pipe(concat(function () {
      res.statusCode = 200
      res.json({ error: 'not really an error', reason: 'unknown' })
    }))
  })

  server.expect('GET', '/body-error-object', function (req, res) {
    req.pipe(concat(function () {
      res.statusCode = 200
      res.json({ error: {} })
    }))
  })

  server.expect('GET', '/@scoped%2Fpackage-failing', function (req, res) {
    req.pipe(concat(function () {
      res.statusCode = 402
      res.json({ error: 'payment required' })
    }))
  })

  var defaults = {}
  client.request(
    common.registry + '/request-defaults',
    defaults,
    function (er, data, raw, response) {
      t.ifError(er, 'call worked')
      t.deepEquals(data, { fetched: 'defaults' }, 'confirmed defaults work')
      t.equal(response.headers.connection, 'keep-alive', 'keep-alive set')
    }
  )

  var lastModified = { lastModified: 'test-last-modified' }
  client.request(common.registry + '/last-modified', lastModified, function (er, data) {
    t.ifError(er, 'call worked')
    t.deepEquals(data, { fetched: 'last-modified' }, 'last-modified request sent')
  })

  var etagged = { etag: 'test-etag' }
  client.request(common.registry + '/etag', etagged, function (er, data) {
    t.ifError(er, 'call worked')
    t.deepEquals(data, { fetched: 'etag' }, 'etag request sent')
  })

  var postEtagged = {
    method: 'post',
    etag: 'post-etag'
  }
  client.request(common.registry + '/etag-post', postEtagged, function (er, data) {
    t.ifError(er, 'call worked')
    t.deepEquals(data, { posted: 'etag' }, 'POST etag request sent')
  })

  var putStream = {
    method: 'PUT',
    body: new OneA(),
    auth: AUTH
  }
  client.request(common.registry + '/body-stream', putStream, function (er, data) {
    t.ifError(er, 'call worked')
    t.deepEquals(data, { put: 'stream' }, 'PUT request with stream sent')
  })

  var putBuffer = {
    method: 'PUT',
    body: new Buffer('hi'),
    auth: AUTH
  }
  client.request(common.registry + '/body-buffer', putBuffer, function (er, data) {
    t.ifError(er, 'call worked')
    t.deepEquals(data, { put: 'buffer' }, 'PUT request with buffer sent')
  })

  var putString = {
    method: 'PUT',
    body: 'erp',
    auth: AUTH
  }
  client.request(common.registry + '/body-string', putString, function (er, data) {
    t.ifError(er, 'call worked')
    t.deepEquals(data, { put: 'string' }, 'PUT request with string sent')
  })

  var putObject = {
    method: 'PUT',
    body: { toJSON: function () { return ['tricky'] } },
    auth: AUTH
  }
  client.request(common.registry + '/body-object', putObject, function (er, data) {
    t.ifError(er, 'call worked')
    t.deepEquals(data, { put: 'object' }, 'PUT request with object sent')
  })

  client.request(common.registry + '/body-error-string', defaults, function (er) {
    t.equal(
      er && er.message,
      'not really an error unknown: body-error-string',
      'call worked'
    )
  })

  client.request(common.registry + '/body-error-object', defaults, function (er) {
    t.ifError(er, 'call worked')
  })

  client.request(common.registry + '/@scoped%2Fpackage-failing', defaults, function (er) {
    t.equals(er.message, 'payment required : @scoped/package-failing')
  })
})
