// Copyright 2017 The Chromium 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:flutter_tools/src/cache.dart';
import 'package:flutter_tools/src/base/time.dart';
import 'package:flutter_tools/src/device.dart';
import 'package:flutter_tools/src/project.dart';
import 'package:flutter_tools/src/usage.dart';
import 'package:flutter_tools/src/base/common.dart';
import 'package:flutter_tools/src/runner/flutter_command.dart';
import 'package:flutter_tools/src/version.dart';
import 'package:mockito/mockito.dart';

import '../src/common.dart';
import '../src/context.dart';
import 'utils.dart';

void main() {
  group('Flutter Command', () {
    MockitoCache cache;
    MockitoUsage usage;
    MockClock clock;
    List<int> mockTimes;

    setUp(() {
      cache = MockitoCache();
      usage = MockitoUsage();
      clock = MockClock();
      when(usage.isFirstRun).thenReturn(false);
      when(clock.now()).thenAnswer(
        (Invocation _) => DateTime.fromMillisecondsSinceEpoch(mockTimes.removeAt(0))
      );
    });

    testUsingContext('honors shouldUpdateCache false', () async {
      final DummyFlutterCommand flutterCommand = DummyFlutterCommand(shouldUpdateCache: false);
      await flutterCommand.run();
      verifyZeroInteractions(cache);
    },
    overrides: <Type, Generator>{
      Cache: () => cache,
    });

    testUsingContext('honors shouldUpdateCache true', () async {
      final DummyFlutterCommand flutterCommand = DummyFlutterCommand(shouldUpdateCache: true);
      await flutterCommand.run();
      verify(cache.updateAll(any)).called(1);
    },
    overrides: <Type, Generator>{
      Cache: () => cache,
    });

    testUsingContext('reports command that results in success', () async {
      // Crash if called a third time which is unexpected.
      mockTimes = <int>[1000, 2000];

      final DummyFlutterCommand flutterCommand = DummyFlutterCommand(
        commandFunction: () async {
          return const FlutterCommandResult(ExitStatus.success);
        }
      );
      await flutterCommand.run();

      expect(
        verify(usage.sendCommand(captureAny,
                parameters: captureAnyNamed('parameters'))).captured,
        <dynamic>[
          'dummy',
          const <String, String>{'cd26': 'success'}
        ],
      );
    },
    overrides: <Type, Generator>{
      SystemClock: () => clock,
      Usage: () => usage,
    });

    testUsingContext('reports command that results in warning', () async {
      // Crash if called a third time which is unexpected.
      mockTimes = <int>[1000, 2000];

      final DummyFlutterCommand flutterCommand = DummyFlutterCommand(
        commandFunction: () async {
          return const FlutterCommandResult(ExitStatus.warning);
        }
      );
      await flutterCommand.run();

      expect(
        verify(usage.sendCommand(captureAny,
                parameters: captureAnyNamed('parameters'))).captured,
        <dynamic>[
          'dummy',
          const <String, String>{'cd26': 'warning'}
        ],
      );
    },
    overrides: <Type, Generator>{
      SystemClock: () => clock,
      Usage: () => usage,
    });

    testUsingContext('reports command that results in failure', () async {
      // Crash if called a third time which is unexpected.
      mockTimes = <int>[1000, 2000];

      final DummyFlutterCommand flutterCommand = DummyFlutterCommand(
        commandFunction: () async {
          return const FlutterCommandResult(ExitStatus.fail);
        }
      );

      try {
        await flutterCommand.run();
      } on ToolExit {
        expect(
          verify(usage.sendCommand(captureAny,
                  parameters: captureAnyNamed('parameters'))).captured,
          <dynamic>[
            'dummy',
            const <String, String>{'cd26': 'fail'}
          ],
        );
      }
    },
    overrides: <Type, Generator>{
      SystemClock: () => clock,
      Usage: () => usage,
    });

    testUsingContext('reports command that results in error', () async {
      // Crash if called a third time which is unexpected.
      mockTimes = <int>[1000, 2000];

      final DummyFlutterCommand flutterCommand = DummyFlutterCommand(
        commandFunction: () async {
          throwToolExit('fail');
          return null; // unreachable
        }
      );

      try {
        await flutterCommand.run();
        fail('Mock should make this fail');
      } on ToolExit {
        expect(
          verify(usage.sendCommand(captureAny,
                  parameters: captureAnyNamed('parameters'))).captured,
          <dynamic>[
            'dummy',
            const <String, String>{'cd26': 'fail'}
          ],
        );
      }
    },
    overrides: <Type, Generator>{
      SystemClock: () => clock,
      Usage: () => usage,
    });

    testUsingContext('report execution timing by default', () async {
      // Crash if called a third time which is unexpected.
      mockTimes = <int>[1000, 2000];

      final DummyFlutterCommand flutterCommand = DummyFlutterCommand();
      await flutterCommand.run();
      verify(clock.now()).called(2);

      expect(
        verify(usage.sendTiming(
                captureAny, captureAny, captureAny,
                label: captureAnyNamed('label'))).captured,
        <dynamic>[
          'flutter',
          'dummy',
          const Duration(milliseconds: 1000),
          null
        ],
      );
    },
    overrides: <Type, Generator>{
      SystemClock: () => clock,
      Usage: () => usage,
    });

    testUsingContext('no timing report without usagePath', () async {
      // Crash if called a third time which is unexpected.
      mockTimes = <int>[1000, 2000];

      final DummyFlutterCommand flutterCommand =
          DummyFlutterCommand(noUsagePath: true);
      await flutterCommand.run();
      verify(clock.now()).called(2);
      verifyNever(usage.sendTiming(
                   any, any, any,
                   label: anyNamed('label')));
    },
    overrides: <Type, Generator>{
      SystemClock: () => clock,
      Usage: () => usage,
    });

    testUsingContext('report additional FlutterCommandResult data', () async {
      // Crash if called a third time which is unexpected.
      mockTimes = <int>[1000, 2000];

      final FlutterCommandResult commandResult = FlutterCommandResult(
        ExitStatus.success,
        // nulls should be cleaned up.
        timingLabelParts: <String> ['blah1', 'blah2', null, 'blah3'],
        endTimeOverride: DateTime.fromMillisecondsSinceEpoch(1500),
      );

      final DummyFlutterCommand flutterCommand = DummyFlutterCommand(
        commandFunction: () async => commandResult
      );
      await flutterCommand.run();
      verify(clock.now()).called(2);
      expect(
        verify(usage.sendTiming(
                captureAny, captureAny, captureAny,
                label: captureAnyNamed('label'))).captured,
        <dynamic>[
          'flutter',
          'dummy',
          const Duration(milliseconds: 500), // FlutterCommandResult's end time used instead.
          'success-blah1-blah2-blah3',
        ],
      );
    },
    overrides: <Type, Generator>{
      SystemClock: () => clock,
      Usage: () => usage,
    });

    testUsingContext('report failed execution timing too', () async {
      // Crash if called a third time which is unexpected.
      mockTimes = <int>[1000, 2000];

      final DummyFlutterCommand flutterCommand = DummyFlutterCommand(
        commandFunction: () async {
          throwToolExit('fail');
          return null; // unreachable
        },
      );

      try {
        await flutterCommand.run();
        fail('Mock should make this fail');
      } on ToolExit {
        // Should have still checked time twice.
        verify(clock.now()).called(2);

        expect(
          verify(usage.sendTiming(
                  captureAny, captureAny, captureAny,
                  label: captureAnyNamed('label'))).captured,
          <dynamic>[
            'flutter',
            'dummy',
            const Duration(milliseconds: 1000),
            'fail',
          ],
        );
      }
    },
    overrides: <Type, Generator>{
      SystemClock: () => clock,
      Usage: () => usage,
    });

  });

  group('Experimental commands', () {
    final MockVersion stableVersion = MockVersion();
    final MockVersion betaVersion = MockVersion();
    final FakeCommand fakeCommand = FakeCommand();
    when(stableVersion.isMaster).thenReturn(false);
    when(betaVersion.isMaster).thenReturn(true);

    testUsingContext('Can be disabled on stable branch', () async {
      expect(() => fakeCommand.run(), throwsA(isA<ToolExit>()));
    }, overrides: <Type, Generator>{
      FlutterVersion: () => stableVersion,
    });

    testUsingContext('Works normally on regular branches', () async {
      expect(fakeCommand.run(), completes);
    }, overrides: <Type, Generator>{
      FlutterVersion: () => betaVersion,
    });
  });

  group('Filter devices', () {
    MockDevice ephemeral;
    MockDevice nonEphemeralOne;
    MockDevice nonEphemeralTwo;
    MockDevice unsupported;

    setUp(() {
      ephemeral = MockDevice(true);
      nonEphemeralOne = MockDevice(false);
      nonEphemeralTwo = MockDevice(false);
      unsupported = MockDevice(true, false);
    });

    test('chooses ephemeral device', () {
      final List<Device> filtered = filterDevices(<Device>[
        ephemeral,
        nonEphemeralOne,
        nonEphemeralTwo,
        unsupported,
      ]);

      expect(filtered.single, ephemeral);
    });

    test('does not remove all non-ephemeral', () {
      final List<Device> filtered = filterDevices(<Device>[
        nonEphemeralOne,
        nonEphemeralTwo,
      ]);

      expect(filtered, <Device>[
        nonEphemeralOne,
        nonEphemeralTwo,
      ]);
    });
  });
}


class FakeCommand extends FlutterCommand {
  @override
  String get description => null;

  @override
  String get name => 'fake';

  @override
  bool get isExperimental => true;

  @override
  Future<FlutterCommandResult> runCommand() async {
    return null;
  }
}

class MockVersion extends Mock implements FlutterVersion {}

class MockDevice extends Mock implements Device {
  MockDevice(this.ephemeral, [this._isSupported = true]);

  @override
  final bool ephemeral;

  bool _isSupported;

  @override
  bool isSupportedForProject(FlutterProject flutterProject) => _isSupported;
}