// Copyright 2014 The Flutter Authors. 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:file/memory.dart';
import 'package:flutter_tools/src/artifacts.dart';
import 'package:flutter_tools/src/base/file_system.dart';
import 'package:flutter_tools/src/base/io.dart';
import 'package:flutter_tools/src/base/platform.dart';
import 'package:flutter_tools/src/build_info.dart';
import 'package:flutter_tools/src/dart/pub.dart';
import 'package:flutter_tools/src/devfs.dart';
import 'package:flutter_tools/src/device.dart';
import 'package:flutter_tools/src/reporting/reporting.dart';
import 'package:flutter_tools/src/resident_devtools_handler.dart';
import 'package:flutter_tools/src/resident_runner.dart';
import 'package:flutter_tools/src/run_hot.dart';
import 'package:flutter_tools/src/vmservice.dart';
import 'package:unified_analytics/unified_analytics.dart';
import 'package:vm_service/vm_service.dart' as vm_service;

import '../src/common.dart';
import '../src/context.dart';
import '../src/fakes.dart';
import '../src/package_config.dart';
import '../src/throwing_pub.dart';
import 'hot_shared.dart';

void main() {
  group('validateReloadReport', () {
    testUsingContext('invalid', () async {
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{
            'type': 'ReloadReport',
            'success': false,
            'details': <String, dynamic>{},
          }),
        ),
        false,
      );
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{
            'type': 'ReloadReport',
            'success': false,
            'details': <String, dynamic>{'notices': <Map<String, dynamic>>[]},
          }),
        ),
        false,
      );
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{
            'type': 'ReloadReport',
            'success': false,
            'details': <String, dynamic>{
              'notices': <String, dynamic>{'message': 'error'},
            },
          }),
        ),
        false,
      );
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{
            'type': 'ReloadReport',
            'success': false,
            'details': <String, dynamic>{'notices': <Map<String, dynamic>>[]},
          }),
        ),
        false,
      );
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{
            'type': 'ReloadReport',
            'success': false,
            'details': <String, dynamic>{
              'notices': <Map<String, dynamic>>[
                <String, dynamic>{'message': false},
              ],
            },
          }),
        ),
        false,
      );
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{
            'type': 'ReloadReport',
            'success': false,
            'details': <String, dynamic>{
              'notices': <Map<String, dynamic>>[
                <String, dynamic>{
                  'message': <String>['error'],
                },
              ],
            },
          }),
        ),
        false,
      );
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{
            'type': 'ReloadReport',
            'success': false,
            'details': <String, dynamic>{
              'notices': <Map<String, dynamic>>[
                <String, dynamic>{'message': 'error'},
                <String, dynamic>{
                  'message': <String>['error'],
                },
              ],
            },
          }),
        ),
        false,
      );
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{
            'type': 'ReloadReport',
            'success': false,
            'details': <String, dynamic>{
              'notices': <Map<String, dynamic>>[
                <String, dynamic>{'message': 'error'},
              ],
            },
          }),
        ),
        false,
      );
      expect(
        HotRunner.validateReloadReport(
          vm_service.ReloadReport.parse(<String, dynamic>{'type': 'ReloadReport', 'success': true}),
        ),
        true,
      );
    });

    testWithoutContext('ReasonForCancelling toString has a hint for specific errors', () {
      final ReasonForCancelling reasonForCancelling = ReasonForCancelling(
        message: 'Const class cannot remove fields',
      );

      expect(reasonForCancelling.toString(), contains('Try performing a hot restart instead.'));
    });
  });

  group('hotRestart', () {
    final FakeResidentCompiler residentCompiler = FakeResidentCompiler();
    late MemoryFileSystem fileSystem;
    late TestUsage testUsage;
    late FakeAnalytics fakeAnalytics;

    setUp(() {
      fileSystem = MemoryFileSystem.test();
      testUsage = TestUsage();
      fakeAnalytics = getInitializedFakeAnalyticsInstance(
        fs: fileSystem,
        fakeFlutterVersion: FakeFlutterVersion(),
      );
    });

    group('fails to setup', () {
      late TestHotRunnerConfig failingTestingConfig;
      setUp(() {
        failingTestingConfig = TestHotRunnerConfig(
          successfulHotRestartSetup: false,
          successfulHotReloadSetup: false,
        );
      });

      testUsingContext(
        'setupHotRestart function fails',
        () async {
          fileSystem.file('pubspec.yaml').writeAsStringSync('''
name: my_app
''');
          writePackageConfigFiles(directory: fileSystem.currentDirectory, mainLibName: 'my_app');
          final FakeDevice device = FakeDevice();
          final List<FlutterDevice> devices = <FlutterDevice>[FakeFlutterDevice(device)];
          final OperationResult result = await HotRunner(
            devices,
            debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
            target: 'main.dart',
            devtoolsHandler: createNoOpHandler,
            analytics: fakeAnalytics,
          ).restart(fullRestart: true);
          expect(result.isOk, false);
          expect(result.message, 'setupHotRestart failed');
          expect(failingTestingConfig.updateDevFSCompleteCalled, false);
        },
        overrides: <Type, Generator>{
          HotRunnerConfig: () => failingTestingConfig,
          Artifacts: () => Artifacts.test(),
          FileSystem: () => fileSystem,
          Platform: () => FakePlatform(),
          ProcessManager: () => FakeProcessManager.any(),
          Pub: ThrowingPub.new,
        },
      );

      testUsingContext(
        'setupHotReload function fails',
        () async {
          fileSystem.file('pubspec.yaml').writeAsStringSync('''
name: my_app
''');
          writePackageConfigFiles(directory: fileSystem.currentDirectory, mainLibName: 'my_app');
          final FakeDevice device = FakeDevice();
          final FakeFlutterDevice fakeFlutterDevice = FakeFlutterDevice(device);
          final List<FlutterDevice> devices = <FlutterDevice>[fakeFlutterDevice];
          final OperationResult result =
              await HotRunner(
                devices,
                debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
                target: 'main.dart',
                devtoolsHandler: createNoOpHandler,
                reassembleHelper:
                    (
                      List<FlutterDevice?> flutterDevices,
                      Map<FlutterDevice?, List<FlutterView>> viewCache,
                      void Function(String message)? onSlow,
                      String reloadMessage,
                    ) async => ReassembleResult(
                      <FlutterView?, FlutterVmService?>{null: null},
                      false,
                      true,
                    ),
                analytics: fakeAnalytics,
              ).restart();
          expect(result.isOk, false);
          expect(result.message, 'setupHotReload failed');
          expect(failingTestingConfig.updateDevFSCompleteCalled, false);
        },
        overrides: <Type, Generator>{
          HotRunnerConfig: () => failingTestingConfig,
          Artifacts: () => Artifacts.test(),
          FileSystem: () => fileSystem,
          Platform: () => FakePlatform(),
          ProcessManager: () => FakeProcessManager.any(),
          Pub: ThrowingPub.new,
        },
      );
    });

    group('shutdown hook tests', () {
      late TestHotRunnerConfig shutdownTestingConfig;

      setUp(() {
        shutdownTestingConfig = TestHotRunnerConfig();
      });

      testUsingContext(
        'shutdown hook called after signal',
        () async {
          writePackageConfigFiles(directory: fileSystem.currentDirectory, mainLibName: 'my_app');
          final FakeDevice device = FakeDevice();
          final List<FlutterDevice> devices = <FlutterDevice>[
            FlutterDevice(
              device,
              generator: residentCompiler,
              buildInfo: BuildInfo.debug,
              developmentShaderCompiler: const FakeShaderCompiler(),
            ),
          ];
          await HotRunner(
            devices,
            debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
            target: 'main.dart',
            analytics: fakeAnalytics,
          ).cleanupAfterSignal();
          expect(shutdownTestingConfig.shutdownHookCalled, true);
        },
        overrides: <Type, Generator>{
          HotRunnerConfig: () => shutdownTestingConfig,
          Artifacts: () => Artifacts.test(),
          FileSystem: () => fileSystem,
          Platform: () => FakePlatform(),
          ProcessManager: () => FakeProcessManager.any(),
        },
      );

      testUsingContext(
        'shutdown hook called after app stop',
        () async {
          writePackageConfigFiles(directory: fileSystem.currentDirectory, mainLibName: 'my_app');
          final FakeDevice device = FakeDevice();
          final List<FlutterDevice> devices = <FlutterDevice>[
            FlutterDevice(
              device,
              generator: residentCompiler,
              buildInfo: BuildInfo.debug,
              developmentShaderCompiler: const FakeShaderCompiler(),
            ),
          ];
          await HotRunner(
            devices,
            debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
            target: 'main.dart',
            analytics: fakeAnalytics,
          ).preExit();
          expect(shutdownTestingConfig.shutdownHookCalled, true);
        },
        overrides: <Type, Generator>{
          HotRunnerConfig: () => shutdownTestingConfig,
          Artifacts: () => Artifacts.test(),
          FileSystem: () => fileSystem,
          Platform: () => FakePlatform(),
          ProcessManager: () => FakeProcessManager.any(),
        },
      );
    });

    group('successful hot restart', () {
      late TestHotRunnerConfig testingConfig;
      setUp(() {
        testingConfig = TestHotRunnerConfig(successfulHotRestartSetup: true);
      });
      testUsingContext(
        'correctly tracks time spent for analytics for hot restart',
        () async {
          final FakeDevice device = FakeDevice();
          final FakeFlutterDevice fakeFlutterDevice = FakeFlutterDevice(device);
          final List<FlutterDevice> devices = <FlutterDevice>[fakeFlutterDevice];

          fakeFlutterDevice.updateDevFSReportCallback =
              () async => UpdateFSReport(
                success: true,
                invalidatedSourcesCount: 2,
                syncedBytes: 4,
                scannedSourcesCount: 8,
                compileDuration: const Duration(seconds: 16),
                transferDuration: const Duration(seconds: 32),
              );

          final FakeStopwatchFactory fakeStopwatchFactory = FakeStopwatchFactory(
            stopwatches: <String, Stopwatch>{
              'fullRestartHelper': FakeStopwatch()..elapsed = const Duration(seconds: 64),
              'updateDevFS': FakeStopwatch()..elapsed = const Duration(seconds: 128),
            },
          );

          (fakeFlutterDevice.devFS! as FakeDevFs).baseUri = Uri.parse('file:///base_uri');

          final OperationResult result = await HotRunner(
            devices,
            debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
            target: 'main.dart',
            devtoolsHandler: createNoOpHandler,
            stopwatchFactory: fakeStopwatchFactory,
            analytics: fakeAnalytics,
          ).restart(fullRestart: true);

          expect(result.isOk, true);
          expect(testUsage.events, <TestUsageEvent>[
            const TestUsageEvent(
              'hot',
              'restart',
              parameters: CustomDimensions(
                hotEventTargetPlatform: 'flutter-tester',
                hotEventSdkName: 'Tester',
                hotEventEmulator: false,
                hotEventFullRestart: true,
                hotEventOverallTimeInMs: 64000,
                hotEventSyncedBytes: 4,
                hotEventInvalidatedSourcesCount: 2,
                hotEventTransferTimeInMs: 32000,
                hotEventCompileTimeInMs: 16000,
                hotEventFindInvalidatedTimeInMs: 128000,
                hotEventScannedSourcesCount: 8,
              ),
            ),
          ]);

          expect(
            fakeAnalytics.sentEvents,
            contains(
              Event.hotRunnerInfo(
                label: 'restart',
                targetPlatform: 'flutter-tester',
                sdkName: 'Tester',
                emulator: false,
                fullRestart: true,
                syncedBytes: 4,
                invalidatedSourcesCount: 2,
                transferTimeInMs: 32000,
                overallTimeInMs: 64000,
                compileTimeInMs: 16000,
                findInvalidatedTimeInMs: 128000,
                scannedSourcesCount: 8,
              ),
            ),
          );
          expect(testingConfig.updateDevFSCompleteCalled, true);
        },
        overrides: <Type, Generator>{
          HotRunnerConfig: () => testingConfig,
          Artifacts: () => Artifacts.test(),
          FileSystem: () => fileSystem,
          Platform: () => FakePlatform(),
          ProcessManager: () => FakeProcessManager.any(),
          Usage: () => testUsage,
        },
      );
    });

    group('successful hot reload', () {
      late TestHotRunnerConfig testingConfig;
      setUp(() {
        testingConfig = TestHotRunnerConfig(successfulHotReloadSetup: true);
      });
      testUsingContext(
        'correctly tracks time spent for analytics for hot reload',
        () async {
          final FakeDevice device = FakeDevice();
          final FakeFlutterDevice fakeFlutterDevice = FakeFlutterDevice(device);
          final List<FlutterDevice> devices = <FlutterDevice>[fakeFlutterDevice];

          fakeFlutterDevice.updateDevFSReportCallback =
              () async => UpdateFSReport(
                success: true,
                invalidatedSourcesCount: 6,
                syncedBytes: 8,
                scannedSourcesCount: 16,
                compileDuration: const Duration(seconds: 16),
                transferDuration: const Duration(seconds: 32),
              );

          final FakeStopwatchFactory fakeStopwatchFactory = FakeStopwatchFactory(
            stopwatches: <String, Stopwatch>{
              'updateDevFS': FakeStopwatch()..elapsed = const Duration(seconds: 64),
              'reloadSources:reload': FakeStopwatch()..elapsed = const Duration(seconds: 128),
              'reloadSources:reassemble': FakeStopwatch()..elapsed = const Duration(seconds: 256),
              'reloadSources:vm': FakeStopwatch()..elapsed = const Duration(seconds: 512),
            },
          );

          (fakeFlutterDevice.devFS! as FakeDevFs).baseUri = Uri.parse('file:///base_uri');

          final OperationResult result =
              await HotRunner(
                devices,
                debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
                target: 'main.dart',
                devtoolsHandler: createNoOpHandler,
                stopwatchFactory: fakeStopwatchFactory,
                analytics: fakeAnalytics,
                reloadSourcesHelper: (
                  HotRunner hotRunner,
                  List<FlutterDevice?> flutterDevices,
                  bool? pause,
                  Map<String, dynamic> firstReloadDetails,
                  String? targetPlatform,
                  String? sdkName,
                  bool? emulator,
                  String? reason,
                  Analytics? analytics,
                ) async {
                  firstReloadDetails['finalLibraryCount'] = 2;
                  firstReloadDetails['receivedLibraryCount'] = 3;
                  firstReloadDetails['receivedClassesCount'] = 4;
                  firstReloadDetails['receivedProceduresCount'] = 5;
                  return OperationResult.ok;
                },
                reassembleHelper:
                    (
                      List<FlutterDevice?> flutterDevices,
                      Map<FlutterDevice?, List<FlutterView>> viewCache,
                      void Function(String message)? onSlow,
                      String reloadMessage,
                    ) async => ReassembleResult(
                      <FlutterView?, FlutterVmService?>{null: null},
                      false,
                      true,
                    ),
              ).restart();

          expect(result.isOk, true);
          expect(testUsage.events, <TestUsageEvent>[
            const TestUsageEvent(
              'hot',
              'reload',
              parameters: CustomDimensions(
                hotEventFinalLibraryCount: 2,
                hotEventSyncedLibraryCount: 3,
                hotEventSyncedClassesCount: 4,
                hotEventSyncedProceduresCount: 5,
                hotEventSyncedBytes: 8,
                hotEventInvalidatedSourcesCount: 6,
                hotEventTransferTimeInMs: 32000,
                hotEventOverallTimeInMs: 128000,
                hotEventTargetPlatform: 'flutter-tester',
                hotEventSdkName: 'Tester',
                hotEventEmulator: false,
                hotEventFullRestart: false,
                hotEventCompileTimeInMs: 16000,
                hotEventFindInvalidatedTimeInMs: 64000,
                hotEventScannedSourcesCount: 16,
                hotEventReassembleTimeInMs: 256000,
                hotEventReloadVMTimeInMs: 512000,
              ),
            ),
          ]);
          expect(
            fakeAnalytics.sentEvents,
            contains(
              Event.hotRunnerInfo(
                label: 'reload',
                targetPlatform: 'flutter-tester',
                sdkName: 'Tester',
                emulator: false,
                fullRestart: false,
                finalLibraryCount: 2,
                syncedLibraryCount: 3,
                syncedClassesCount: 4,
                syncedProceduresCount: 5,
                syncedBytes: 8,
                invalidatedSourcesCount: 6,
                transferTimeInMs: 32000,
                overallTimeInMs: 128000,
                compileTimeInMs: 16000,
                findInvalidatedTimeInMs: 64000,
                scannedSourcesCount: 16,
                reassembleTimeInMs: 256000,
                reloadVMTimeInMs: 512000,
              ),
            ),
          );
          expect(testingConfig.updateDevFSCompleteCalled, true);
        },
        overrides: <Type, Generator>{
          HotRunnerConfig: () => testingConfig,
          Artifacts: () => Artifacts.test(),
          FileSystem: () => fileSystem,
          Platform: () => FakePlatform(),
          ProcessManager: () => FakeProcessManager.any(),
          Usage: () => testUsage,
        },
      );
    });

    group('hot restart that failed to sync dev fs', () {
      late TestHotRunnerConfig testingConfig;
      setUp(() {
        testingConfig = TestHotRunnerConfig(successfulHotRestartSetup: true);
      });
      testUsingContext(
        'still calls the devfs complete callback',
        () async {
          final FakeDevice device = FakeDevice();
          final FakeFlutterDevice fakeFlutterDevice = FakeFlutterDevice(device);
          final List<FlutterDevice> devices = <FlutterDevice>[fakeFlutterDevice];
          fakeFlutterDevice.updateDevFSReportCallback =
              () async => throw Exception('updateDevFS failed');

          final HotRunner runner = HotRunner(
            devices,
            debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
            target: 'main.dart',
            devtoolsHandler: createNoOpHandler,
            analytics: fakeAnalytics,
          );

          await expectLater(
            runner.restart(fullRestart: true),
            throwsA(
              isA<Exception>().having(
                (Exception e) => e.toString(),
                'message',
                'Exception: updateDevFS failed',
              ),
            ),
          );
          expect(testingConfig.updateDevFSCompleteCalled, true);
        },
        overrides: <Type, Generator>{
          HotRunnerConfig: () => testingConfig,
          Artifacts: () => Artifacts.test(),
          FileSystem: () => fileSystem,
          Platform: () => FakePlatform(),
          ProcessManager: () => FakeProcessManager.any(),
          Usage: () => testUsage,
        },
      );
    });

    group('hot reload that failed to sync dev fs', () {
      late TestHotRunnerConfig testingConfig;
      setUp(() {
        testingConfig = TestHotRunnerConfig(successfulHotReloadSetup: true);
      });
      testUsingContext(
        'still calls the devfs complete callback',
        () async {
          final FakeDevice device = FakeDevice();
          final FakeFlutterDevice fakeFlutterDevice = FakeFlutterDevice(device);
          final List<FlutterDevice> devices = <FlutterDevice>[fakeFlutterDevice];
          fakeFlutterDevice.updateDevFSReportCallback =
              () async => throw Exception('updateDevFS failed');

          final HotRunner runner = HotRunner(
            devices,
            debuggingOptions: DebuggingOptions.disabled(BuildInfo.debug),
            target: 'main.dart',
            devtoolsHandler: createNoOpHandler,
            analytics: fakeAnalytics,
          );

          await expectLater(
            runner.restart(),
            throwsA(
              isA<Exception>().having(
                (Exception e) => e.toString(),
                'message',
                'Exception: updateDevFS failed',
              ),
            ),
          );
          expect(testingConfig.updateDevFSCompleteCalled, true);
        },
        overrides: <Type, Generator>{
          HotRunnerConfig: () => testingConfig,
          Artifacts: () => Artifacts.test(),
          FileSystem: () => fileSystem,
          Platform: () => FakePlatform(),
          ProcessManager: () => FakeProcessManager.any(),
          Usage: () => testUsage,
        },
      );
    });
  });

  group('hot attach', () {
    late MemoryFileSystem fileSystem;
    late FakeAnalytics fakeAnalytics;

    setUp(() {
      fileSystem = MemoryFileSystem.test();
      fakeAnalytics = getInitializedFakeAnalyticsInstance(
        fs: fileSystem,
        fakeFlutterVersion: FakeFlutterVersion(),
      );
    });

    testUsingContext(
      'Exits with code 2 when HttpException is thrown '
      'during VM service connection',
      () async {
        writePackageConfigFiles(directory: fileSystem.currentDirectory, mainLibName: 'my_app');

        final FakeResidentCompiler residentCompiler = FakeResidentCompiler();
        final FakeDevice device = FakeDevice();
        final List<FlutterDevice> devices = <FlutterDevice>[
          TestFlutterDevice(
            device: device,
            generator: residentCompiler,
            exception: const HttpException(
              'Connection closed before full header was received, '
              'uri = http://127.0.0.1:63394/5ZmLv8A59xY=/ws',
            ),
          ),
        ];

        final int exitCode = await HotRunner(
          devices,
          debuggingOptions: DebuggingOptions.enabled(BuildInfo.debug),
          target: 'main.dart',
          analytics: fakeAnalytics,
        ).attach(needsFullRestart: false);
        expect(exitCode, 2);
      },
      overrides: <Type, Generator>{
        HotRunnerConfig: () => TestHotRunnerConfig(),
        Artifacts: () => Artifacts.test(),
        FileSystem: () => fileSystem,
        Platform: () => FakePlatform(),
        ProcessManager: () => FakeProcessManager.any(),
      },
    );
  });

  group('hot cleanupAtFinish()', () {
    late MemoryFileSystem fileSystem;
    late FakeAnalytics fakeAnalytics;

    setUp(() {
      fileSystem = MemoryFileSystem.test();
      fakeAnalytics = getInitializedFakeAnalyticsInstance(
        fs: fileSystem,
        fakeFlutterVersion: FakeFlutterVersion(),
      );
    });

    testUsingContext('disposes each device', () async {
      final FakeDevice device1 = FakeDevice();
      final FakeDevice device2 = FakeDevice();
      final FakeFlutterDevice flutterDevice1 = FakeFlutterDevice(device1);
      final FakeFlutterDevice flutterDevice2 = FakeFlutterDevice(device2);

      final List<FlutterDevice> devices = <FlutterDevice>[flutterDevice1, flutterDevice2];

      await HotRunner(
        devices,
        debuggingOptions: DebuggingOptions.enabled(BuildInfo.debug),
        target: 'main.dart',
        analytics: fakeAnalytics,
      ).cleanupAtFinish();

      expect(device1.disposed, true);
      expect(device2.disposed, true);

      expect(flutterDevice1.stoppedEchoingDeviceLog, true);
      expect(flutterDevice2.stoppedEchoingDeviceLog, true);
    });
  });
}