// 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.

@Timeout(Duration(minutes: 5))
@TestOn('vm')
import 'dart:io';

import 'package:test/test.dart';
import 'package:vm_service/vm_service.dart';
import 'package:webdriver/io.dart';

import 'fixtures/context.dart';

final context = TestContext(
  path: 'append_body/index.html',
);

Future<void> _waitForPageReady(TestContext context) async {
  var attempt = 100;
  while (attempt-- > 0) {
    final content = await context.webDriver.pageSource;
    if (content.contains('Hello World!')) return;
    await Future.delayed(const Duration(milliseconds: 100));
  }
  throw StateError('Page never initialized');
}

void main() {
  group('Injected client', () {
    setUp(() async {
      await context.setUp(
        serveDevTools: true,
      );
      await context.webDriver.driver.keyboard.sendChord([Keyboard.alt, 'd']);
      // Wait for DevTools to actually open.
      await Future.delayed(const Duration(seconds: 2));
    });

    tearDown(() async {
      await context.tearDown();
    });

    test('can launch devtools', () async {
      final windows = await context.webDriver.windows.toList();
      await context.webDriver.driver.switchTo.window(windows.last);
      // TODO(grouma): switch back to `fixture.webdriver.title` when
      // https://github.com/flutter/devtools/issues/2045 is fixed.
      expect(await context.webDriver.pageSource, contains('Flutter'));
      expect(await context.webDriver.currentUrl, contains('ide=Dwds'));
      // TODO(elliette): Re-enable and fix flakes.
    }, skip: true);

    test(
      'can not launch devtools for the same app in multiple tabs',
      () async {
        final appUrl = await context.webDriver.currentUrl;
        // Open a new tab, select it, and navigate to the app
        await context.webDriver.driver
            .execute("window.open('$appUrl', '_blank');", []);
        await Future.delayed(const Duration(seconds: 2));
        var windows = await context.webDriver.windows.toList();
        final oldAppWindow = windows[0];
        final newAppWindow = windows[1];
        var devToolsWindow = windows[2];
        await newAppWindow.setAsActive();

        // Wait for the page to be ready before trying to open DevTools again.
        await _waitForPageReady(context);

        // Try to open devtools and check for the alert.
        await context.webDriver.driver.keyboard.sendChord([Keyboard.alt, 'd']);
        await Future.delayed(const Duration(seconds: 2));
        final alert = context.webDriver.driver.switchTo.alert;
        expect(alert, isNotNull);
        expect(await alert.text,
            contains('This app is already being debugged in a different tab'));
        await alert.accept();

        // Now close the old app and try to re-open devtools.
        await oldAppWindow.setAsActive();
        await oldAppWindow.close();
        await devToolsWindow.setAsActive();
        await devToolsWindow.close();
        await newAppWindow.setAsActive();
        await context.webDriver.driver.keyboard.sendChord([Keyboard.alt, 'd']);
        await Future.delayed(const Duration(seconds: 2));
        windows = await context.webDriver.windows.toList();
        devToolsWindow = windows.firstWhere((window) => window != newAppWindow);
        await devToolsWindow.setAsActive();
        // TODO(grouma): switch back to `fixture.webdriver.title` when
        // https://github.com/flutter/devtools/issues/2045 is fixed.
        expect(await context.webDriver.pageSource, contains('Flutter'));
      },
      // TODO(elliette): Enable this test once
      // https://github.com/dart-lang/webdev/issues/1504 is resolved.
      skip: true,
    );

    test('destroys and recreates the isolate during a page refresh', () async {
      // This test is the same as one in reload_test, but runs here when there
      // is a connected client (DevTools) since it can behave differently.
      // https://github.com/dart-lang/webdev/pull/901#issuecomment-586438132
      final client = context.debugConnection.vmService;
      await client.streamListen('Isolate');
      await context.changeInput();

      final eventsDone = expectLater(
          client.onIsolateEvent,
          emitsThrough(emitsInOrder([
            _hasKind(EventKind.kIsolateExit),
            _hasKind(EventKind.kIsolateStart),
            _hasKind(EventKind.kIsolateRunnable),
          ])));

      await context.webDriver.driver.refresh();

      await eventsDone;
    });
  });

  group('Injected client without DevTools', () {
    setUp(() async {
      await context.setUp(serveDevTools: false);
    });

    tearDown(() async {
      await context.tearDown();
    });

    test('gives a good error if devtools is not served', () async {
      // Try to open devtools and check for the alert.
      await context.webDriver.driver.keyboard.sendChord([Keyboard.alt, 'd']);
      await Future.delayed(const Duration(seconds: 2));
      final alert = context.webDriver.driver.switchTo.alert;
      expect(alert, isNotNull);
      expect(await alert.text, contains('--debug'));
      await alert.accept();
    });
  });

  group('Injected client with debug extension and without DevTools', () {
    setUp(() async {
      await context.setUp(enableDebugExtension: true, serveDevTools: false);
    });

    tearDown(() async {
      await context.tearDown();
    });

    test('gives a good error if devtools is not served', () async {
      // Click on extension
      await context.extensionConnection.sendCommand('Runtime.evaluate', {
        'expression': 'fakeClick()',
      });
      // Try to open devtools and check for the alert.
      await context.webDriver.driver.keyboard.sendChord([Keyboard.alt, 'd']);
      await Future.delayed(const Duration(seconds: 2));
      final alert = context.webDriver.driver.switchTo.alert;
      expect(alert, isNotNull);
      expect(await alert.text, contains('--debug'));
      await alert.accept();
    });
  }, tags: ['extension'], skip: Platform.isWindows);
}

TypeMatcher<Event> _hasKind(String kind) =>
    isA<Event>().having((e) => e.kind, 'kind', kind);