// Copyright (c) 2014, 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.

library services.common_server_api_test;

import 'dart:async';
import 'dart:convert';

import 'package:dart_services/src/common.dart';
import 'package:dart_services/src/common_server_impl.dart';
import 'package:dart_services/src/common_server_api.dart';
import 'package:dart_services/src/server_cache.dart';
import 'package:logging/logging.dart';
import 'package:mock_request/mock_request.dart';
import 'package:shelf/shelf_io.dart' as shelf_io;
import 'package:test/test.dart';

const versions = ['v1', 'v2'];

const quickFixesCode = r'''
import 'dart:async';
void main() {
  int i = 0;
}
''';

const preFormattedCode = r'''
void main()
{
int i = 0;
}
''';

const postFormattedCode = r'''
void main() {
  int i = 0;
}
''';

const formatBadCode = r'''
void main()
{
  print('foo')
}
''';

const assistCode = r'''
main() {
  int v = 0;
}
''';

const counterApp = r'''
// Copyright (c) 2019, 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 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ),
    );
  }
}
''';

const draggableAndPhysicsApp = '''
import 'package:flutter/material.dart';
import 'package:flutter/physics.dart';

main() {
  runApp(
    MaterialApp(
      debugShowCheckedModeBanner: false,
      home: PhysicsCardDragDemo(),
    ),
  );
}

class PhysicsCardDragDemo extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('A draggable card!'),
      ),
      body: DraggableCard(
        child: FlutterLogo(
          size: 128,
        ),
      ),
    );
  }
}

class DraggableCard extends StatefulWidget {
  final Widget child;
  DraggableCard({this.child});

  @override
  _DraggableCardState createState() => _DraggableCardState();
}

class _DraggableCardState extends State<DraggableCard>
    with SingleTickerProviderStateMixin {
  AnimationController _controller;
  Alignment _dragAlignment = Alignment.center;
  Animation<Alignment> _animation;

  void _runAnimation(Offset pixelsPerSecond, Size size) {
    _animation = _controller.drive(
      AlignmentTween(
        begin: _dragAlignment,
        end: Alignment.center,
      ),
    );

    final unitsPerSecondX = pixelsPerSecond.dx / size.width;
    final unitsPerSecondY = pixelsPerSecond.dy / size.height;
    final unitsPerSecond = Offset(unitsPerSecondX, unitsPerSecondY);
    final unitVelocity = unitsPerSecond.distance;

    const spring = SpringDescription(
      mass: 30,
      stiffness: 1,
      damping: 1,
    );

    final simulation = SpringSimulation(spring, 0, 1, -unitVelocity);

    _controller.animateWith(simulation);
  }

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(vsync: this);

    _controller.addListener(() {
      setState(() {
        _dragAlignment = _animation.value;
      });
    });
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final size = MediaQuery.of(context).size;
    return GestureDetector(
      onPanDown: (details) {
        _controller.stop();
      },
      onPanUpdate: (details) {
        setState(() {
          _dragAlignment += Alignment(
            details.delta.dx / (size.width / 2),
            details.delta.dy / (size.height / 2),
          );
        });
      },
      onPanEnd: (details) {
        _runAnimation(details.velocity.pixelsPerSecond, size);
      },
      child: Align(
        alignment: _dragAlignment,
        child: Card(
          child: widget.child,
        ),
      ),
    );
  }
}
''';

void main() => defineTests();

void defineTests() {
  CommonServerApi commonServerApi;
  CommonServerImpl commonServerImpl;

  MockContainer container;
  MockCache cache;

  Future<MockHttpResponse> _sendPostRequest(
    String path,
    dynamic jsonData,
  ) async {
    assert(commonServerApi != null);
    final uri = Uri.parse('/api/$path');
    final request = MockHttpRequest('POST', uri);
    request.headers.add('content-type', JSON_CONTENT_TYPE);
    request.add(utf8.encode(json.encode(jsonData)));
    await request.close();
    await shelf_io.handleRequest(request, commonServerApi.router);
    return request.response;
  }

  Future<MockHttpResponse> _sendGetRequest(
    String path,
  ) async {
    assert(commonServerApi != null);
    final uri = Uri.parse('/api/$path');
    final request = MockHttpRequest('POST', uri);
    request.headers.add('content-type', JSON_CONTENT_TYPE);
    await request.close();
    await shelf_io.handleRequest(request, commonServerApi.router);
    return request.response;
  }

  group('CommonServerProto JSON', () {
    setUpAll(() async {
      container = MockContainer();
      cache = MockCache();
      commonServerImpl = CommonServerImpl(container, cache);
      commonServerApi = CommonServerApi(commonServerImpl);
      await commonServerImpl.init();

      // Some piece of initialization doesn't always happen fast enough for this
      // request to work in time for the test. So try it here until the server
      // returns something valid.
      // TODO(jcollins-g): determine which piece of initialization isn't
      // happening and deal with that in warmup/init.
      {
        var decodedJson = {};
        final jsonData = {'source': sampleCodeError};
        while (decodedJson.isEmpty) {
          final response =
              await _sendPostRequest('dartservices/v2/analyze', jsonData);
          expect(response.statusCode, 200);
          expect(response.headers['content-type'],
              ['application/json; charset=utf-8']);
          final data = await response.transform(utf8.decoder).join();
          decodedJson = json.decode(data) as Map<dynamic, dynamic>;
        }
      }
    });

    tearDownAll(() async {
      await commonServerImpl.shutdown();
    });

    setUp(() {
      log.onRecord.listen((LogRecord rec) {
        print('${rec.level.name}: ${rec.time}: ${rec.message}');
      });
    });

    tearDown(log.clearListeners);

    test('analyze Dart', () async {
      for (final version in versions) {
        final jsonData = {'source': sampleCode};
        final response =
            await _sendPostRequest('dartservices/$version/analyze', jsonData);
        expect(response.statusCode, 200);
        final data = await response.transform(utf8.decoder).join();
        expect(json.decode(data), {});
      }
    });

    test('analyze Flutter', () async {
      for (final version in versions) {
        final jsonData = {'source': sampleCodeFlutter};
        final response =
            await _sendPostRequest('dartservices/$version/analyze', jsonData);
        expect(response.statusCode, 200);
        final data = await response.transform(utf8.decoder).join();
        expect(json.decode(data), {
          'packageImports': ['flutter']
        });
      }
    });

    test('analyze counterApp', () async {
      for (final version in versions) {
        final jsonData = {'source': counterApp};
        final response =
            await _sendPostRequest('dartservices/$version/analyze', jsonData);
        expect(response.statusCode, 200);
        final data = await response.transform(utf8.decoder).join();
        expect(json.decode(data), {
          'packageImports': ['flutter']
        });
      }
    });

    test('analyze draggableAndPhysicsApp', () async {
      for (final version in versions) {
        final jsonData = {'source': draggableAndPhysicsApp};
        final response =
            await _sendPostRequest('dartservices/$version/analyze', jsonData);
        expect(response.statusCode, 200);
        final data = await response.transform(utf8.decoder).join();
        expect(json.decode(data), {
          'packageImports': ['flutter']
        });
      }
    });

    test('analyze errors', () async {
      for (final version in versions) {
        final jsonData = {'source': sampleCodeError};
        final response =
            await _sendPostRequest('dartservices/$version/analyze', jsonData);
        expect(response.statusCode, 200);
        expect(response.headers['content-type'],
            ['application/json; charset=utf-8']);
        final data = await response.transform(utf8.decoder).join();
        final expectedJson = {
          'issues': [
            {
              'kind': 'error',
              'line': 2,
              'sourceName': 'main.dart',
              'message': "Expected to find ';'.",
              'hasFixes': true,
              'charStart': 29,
              'charLength': 1
            }
          ]
        };
        expect(json.decode(data), expectedJson);
      }
    });

    test('analyze negative-test noSource', () async {
      for (final version in versions) {
        final jsonData = {};
        final response =
            await _sendPostRequest('dartservices/$version/analyze', jsonData);
        expect(response.statusCode, 400);
      }
    });

    test('compile', () async {
      for (final version in versions) {
        final jsonData = {'source': sampleCode};
        final response =
            await _sendPostRequest('dartservices/$version/compile', jsonData);
        expect(response.statusCode, 200);
        final data = await response.transform(utf8.decoder).join();
        expect(json.decode(data), isNotEmpty);
      }
    });

    test('compile error', () async {
      for (final version in versions) {
        final jsonData = {'source': sampleCodeError};
        final response =
            await _sendPostRequest('dartservices/$version/compile', jsonData);
        expect(response.statusCode, 400);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data, isNotEmpty);
        expect(data['error']['message'], contains('Error: Expected'));
      }
    });

    test('compile negative-test noSource', () async {
      for (final version in versions) {
        final jsonData = {};
        final response =
            await _sendPostRequest('dartservices/$version/compile', jsonData);
        expect(response.statusCode, 400);
      }
    });

    test('compileDDC', () async {
      for (final version in versions) {
        final jsonData = {'source': sampleCode};
        final response = await _sendPostRequest(
            'dartservices/$version/compileDDC', jsonData);
        expect(response.statusCode, 200);
        final data = await response.transform(utf8.decoder).join();
        expect(json.decode(data), isNotEmpty);
      }
    });

    test('complete', () async {
      for (final version in versions) {
        final jsonData = {'source': 'void main() {print("foo");}', 'offset': 1};
        final response =
            await _sendPostRequest('dartservices/$version/complete', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data, isNotEmpty);
      }
    });

    test('complete no data', () async {
      for (final version in versions) {
        final response =
            await _sendPostRequest('dartservices/$version/complete', {});
        expect(response.statusCode, 400);
      }
    });

    test('complete param missing', () async {
      for (final version in versions) {
        final jsonData = {'offset': 1};
        final response =
            await _sendPostRequest('dartservices/$version/complete', jsonData);
        expect(response.statusCode, 400);
      }
    });

    test('complete param missing 2', () async {
      for (final version in versions) {
        final jsonData = {'source': 'void main() {print("foo");}'};
        final response =
            await _sendPostRequest('dartservices/$version/complete', jsonData);
        expect(response.statusCode, 400);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data['error']['message'], 'Missing parameter: \'offset\'');
      }
    });

    test('document', () async {
      for (final version in versions) {
        final jsonData = {
          'source': 'void main() {print("foo");}',
          'offset': 17
        };
        final response =
            await _sendPostRequest('dartservices/$version/document', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data, isNotEmpty);
      }
    });

    test('document little data', () async {
      for (final version in versions) {
        final jsonData = {'source': 'void main() {print("foo");}', 'offset': 2};
        final response =
            await _sendPostRequest('dartservices/$version/document', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data, {
          'info': {},
        });
      }
    });

    test('document no data', () async {
      for (final version in versions) {
        final jsonData = {
          'source': 'void main() {print("foo");}',
          'offset': 12
        };
        final response =
            await _sendPostRequest('dartservices/$version/document', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data, {'info': {}});
      }
    });

    test('document negative-test noSource', () async {
      for (final version in versions) {
        final jsonData = {'offset': 12};
        final response =
            await _sendPostRequest('dartservices/$version/document', jsonData);
        expect(response.statusCode, 400);
      }
    });

    test('document negative-test noOffset', () async {
      for (final version in versions) {
        final jsonData = {'source': 'void main() {print("foo");}'};
        final response =
            await _sendPostRequest('dartservices/$version/document', jsonData);
        expect(response.statusCode, 400);
      }
    });

    test('format', () async {
      for (final version in versions) {
        final jsonData = {'source': preFormattedCode};
        final response =
            await _sendPostRequest('dartservices/$version/format', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data['newString'], postFormattedCode);
      }
    });

    test('format bad code', () async {
      for (final version in versions) {
        final jsonData = {'source': formatBadCode};
        final response =
            await _sendPostRequest('dartservices/$version/format', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data['newString'], formatBadCode);
      }
    });

    test('format position', () async {
      for (final version in versions) {
        final jsonData = {'source': preFormattedCode, 'offset': 21};
        final response =
            await _sendPostRequest('dartservices/$version/format', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data['newString'], postFormattedCode);
        expect(data['offset'], 24);
      }
    });

    test('fix', () async {
      for (final version in versions) {
        final jsonData = {'source': quickFixesCode, 'offset': 10};
        final response =
            await _sendPostRequest('dartservices/$version/fixes', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        final fixes = data['fixes'];
        expect(fixes.length, 1);
        final problemAndFix = fixes[0];
        expect(problemAndFix['problemMessage'], isNotNull);
      }
    });

    test('fixes completeness', () async {
      for (final version in versions) {
        final jsonData = {
          'source': '''
void main() {
  for (int i = 0; i < 4; i++) {
    print('hello \$i')
  }
}
''',
          'offset': 67,
        };
        final response =
            await _sendPostRequest('dartservices/$version/fixes', jsonData);
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data, {
          'fixes': [
            {
              'fixes': [
                {
                  'message': "Insert ';'",
                  'edits': [
                    {'offset': 67, 'length': 0, 'replacement': ';'}
                  ]
                }
              ],
              'problemMessage': "Expected to find ';'.",
              'offset': 66,
              'length': 1
            }
          ]
        });
      }
    });

    test('assist', () async {
      for (final version in versions) {
        final jsonData = {'source': assistCode, 'offset': 15};
        final response =
            await _sendPostRequest('dartservices/$version/assists', jsonData);
        expect(response.statusCode, 200);

        final data = json.decode(await response.transform(utf8.decoder).join());
        final assists = data['assists'] as List;
        expect(assists, hasLength(2));
        expect(assists.first['edits'], isNotNull);
        expect(assists.first['edits'], hasLength(1));
        expect(assists.where((m) {
          final map = m as Map<String, dynamic>;
          return map['message'] == 'Remove type annotation';
        }), isNotEmpty);
      }
    });

    test('version', () async {
      for (final version in versions) {
        final response = await _sendGetRequest('dartservices/$version/version');
        expect(response.statusCode, 200);
        final data = json.decode(await response.transform(utf8.decoder).join());
        expect(data['sdkVersion'], isNotNull);
        expect(data['runtimeVersion'], isNotNull);
      }
    });
  });
}

class MockContainer implements ServerContainer {
  @override
  String get version => vmVersion;
}

class MockCache implements ServerCache {
  @override
  Future<String> get(String key) => Future.value(null);

  @override
  Future set(String key, String value, {Duration expiration}) => Future.value();

  @override
  Future remove(String key) => Future.value();

  @override
  Future<void> shutdown() => Future.value();
}