// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'dart:async';
import 'dart:io';

import 'package:path/path.dart' as p;
import 'package:test/test.dart';

import 'package:shelf/shelf.dart';
import 'package:shelf_static/shelf_static.dart';

import 'test_util.dart';

void main() {
  group('/index.html', () {
    test('body is correct', () async {
      await _testFileContents('index.html');
    });

    test('mimeType is text/html', () async {
      var response = await _requestFile('index.html');
      expect(response.mimeType, 'text/html');
    });

    group('/favicon.ico', () {
      test('body is correct', () async {
        await _testFileContents('favicon.ico');
      });

      test('mimeType is text/html', () async {
        var response = await _requestFile('favicon.ico');
        expect(response.mimeType, 'image/x-icon');
      });
    });
  });

  group('/dart.png', () {
    test('body is correct', () async {
      await _testFileContents('dart.png');
    });

    test('mimeType is image/png', () async {
      var response = await _requestFile('dart.png');
      expect(response.mimeType, 'image/png');
    });
  });
}

Future<Response> _requestFile(String filename) {
  var uri = Uri.parse('http://localhost/$filename');

  return _request(new Request('GET', uri));
}

Future _testFileContents(String filename) async {
  var filePath = p.join(_samplePath, filename);
  var file = new File(filePath);
  var fileContents = file.readAsBytesSync();
  var fileStat = file.statSync();

  var response = await _requestFile(filename);
  expect(response.contentLength, fileStat.size);
  expect(response.lastModified, atSameTimeToSecond(fileStat.changed.toUtc()));
  await _expectCompletesWithBytes(response, fileContents);
}

Future _expectCompletesWithBytes(
    Response response, List<int> expectedBytes) async {
  var bytes = await response.read().toList();
  var flatBytes = bytes.expand((e) => e);
  expect(flatBytes, orderedEquals(expectedBytes));
}

Future<Response> _request(Request request) async {
  var handler = createStaticHandler(_samplePath);
  return await handler(request);
}

String get _samplePath {
  var sampleDir = p.join(p.current, 'example', 'files');
  assert(FileSystemEntity.isDirectorySync(sampleDir));
  return sampleDir;
}