// Copyright (c) 2016, 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.

@TestOn('vm')
import 'dart:async';
import 'dart:io';
import 'dart:isolate';

import 'package:node_preamble/preamble.dart' as preamble;
import 'package:package_config/package_config.dart';
import 'package:path/path.dart' as p;
import 'package:test_descriptor/test_descriptor.dart' as d;
import 'package:test_process/test_process.dart';

import 'package:test_core/src/util/io.dart';
import 'package:test/test.dart';
import 'package:test/src/util/package_map.dart';

import '../io.dart';

void main() {
  group('browser tests', () {
    setUp(() async {
      await d.file('to_precompile.dart', '''
        import "package:stream_channel/stream_channel.dart";

        import "package:test_core/src/runner/plugin/remote_platform_helpers.dart";
        import "package:test/src/runner/browser/post_message_channel.dart";
        import "package:test/test.dart";

        main(_) async {
          var channel = serializeSuite(() {
            return () => test("success", () {});
          }, hidePrints: false);
          postMessageChannel().pipe(channel);
        }
      ''').create();

      await d.dir('precompiled', [
        d.file('test.html', '''
          <!DOCTYPE html>
          <html>
          <head>
            <title>test Test</title>
            <script src="test.dart.browser_test.dart.js"></script>
          </head>
          </html>
        ''')
      ]).create();

      var dart2js = await TestProcess.start(
          p.join(sdkDir, 'bin', 'dart2js'),
          [
            '--packages=${await Isolate.packageConfig}',
            'to_precompile.dart',
            '--out=precompiled/test.dart.browser_test.dart.js'
          ],
          workingDirectory: d.sandbox);
      await dart2js.shouldExit(0);

      await d.file('test.dart', 'invalid dart}').create();
    });

    test('run a precompiled version of a test rather than recompiling',
        () async {
      var test = await runTest(
          ['-p', 'chrome', '--precompiled=precompiled/', 'test.dart']);
      expect(test.stdout,
          containsInOrder(['+0: success', '+1: All tests passed!']));
      await test.shouldExit(0);
    });

    test('can use the json reporter', () async {
      var test = await runTest([
        '-p',
        'chrome',
        '--precompiled=precompiled/',
        'test.dart',
        '-r',
        'json'
      ]);
      expect(
          test.stdout,
          containsInOrder([
            '{"testID":3,"result":"success"',
            '{"success":true,"type":"done"'
          ]));
      await test.shouldExit(0);
    });
  }, tags: const ['chrome']);

  group('node tests', () {
    setUp(() async {
      await d.dir('test', [
        d.file('test.dart', '''
          import "package:test/src/bootstrap/node.dart";
          import "package:test/test.dart";

          void main() {
            internalBootstrapNodeTest(() => () => test("success", () {
              expect(true, isTrue);
            }));
          }''')
      ]).create();
      await _writePackagesFile();

      var jsPath = p.join(d.sandbox, 'test', 'test.dart.node_test.dart.js');
      var dart2js = await TestProcess.start(
          p.join(sdkDir, 'bin', 'dart2js'),
          [
            '--packages=${await Isolate.packageConfig}',
            p.join('test', 'test.dart'),
            '--out=$jsPath',
          ],
          workingDirectory: d.sandbox);
      await dart2js.shouldExit(0);

      var jsFile = File(jsPath);
      await jsFile.writeAsString(
          preamble.getPreamble(minified: true) + await jsFile.readAsString());

      await d.dir('test', [d.file('test.dart', 'invalid dart}')]).create();
    });

    test('run a precompiled version of a test rather than recompiling',
        () async {
      var test = await runTest([
        '-p',
        'node',
        '--precompiled',
        d.sandbox,
        p.join('test', 'test.dart')
      ]);
      expect(test.stdout,
          containsInOrder(['+0: success', '+1: All tests passed!']));
      await test.shouldExit(0);
    });

    test('can use the json reporter', () async {
      var test = await runTest([
        '-p',
        'node',
        '--precompiled',
        d.sandbox,
        p.join('test', 'test.dart'),
        '-r',
        'json'
      ]);
      expect(
          test.stdout,
          containsInOrder([
            '{"testID":3,"result":"success"',
            '{"success":true,"type":"done"'
          ]));
      await test.shouldExit(0);
    });
  }, tags: const ['node']);

  group('vm tests', () {
    setUp(() async {
      await d.dir('test', [
        d.file('test.dart', '''
          import "package:test/test.dart";
          void main() {
            test("true is true", () {
              expect(true, isTrue);
            });
          }
        '''),
        d.file('test.dart.vm_test.dart', '''
          import "dart:isolate";
          import "package:test_core/src/bootstrap/vm.dart";
          import "test.dart" as test;
          void main(_, SendPort message) {
            internalBootstrapVmTest(() => test.main, message);
          }
        '''),
      ]).create();
      await _writePackagesFile();
    });

    test('run in the precompiled directory', () async {
      var test = await runTest(
          ['-p', 'vm', '--precompiled=${d.sandbox}', 'test/test.dart']);
      expect(test.stdout,
          containsInOrder(['+0: true is true', '+1: All tests passed!']));
      await test.shouldExit(0);
    });

    test('can load precompiled dill files if available', () async {
      // Create the snapshot in the sandbox directory.
      var snapshotProcess = await runDart([
        '--snapshot_kind=script',
        '--snapshot=test/test.dart.vm_test.vm.app.dill',
        'test/test.dart.vm_test.dart'
      ]);
      await snapshotProcess.shouldExit(0);

      // Modify the original test so it would fail if it actually got ran, this
      // makes sure the test fails if the dill file isn't loaded.
      var testFile = File(p.join(d.sandbox, 'test', 'test.dart'));
      expect(await testFile.exists(), isTrue);
      var originalContent = await testFile.readAsString();
      await testFile
          .writeAsString(originalContent.replaceAll('isTrue', 'isFalse'));

      // Actually invoke the test with the dill file.
      var testProcess = await runTest(
          ['-p', 'vm', '--precompiled=${d.sandbox}', 'test/test.dart']);
      expect(testProcess.stdout,
          containsInOrder(['+0: true is true', '+1: All tests passed!']));
      await testProcess.shouldExit(0);
    });

    test('can use the json reporter', () async {
      var test = await runTest([
        '-p',
        'vm',
        '--precompiled=${d.sandbox}',
        'test/test.dart',
        '-r',
        'json'
      ]);
      expect(
          test.stdout,
          containsInOrder([
            '{"testID":3,"result":"success"',
            '{"success":true,"type":"done"'
          ]));
      await test.shouldExit(0);
    });
  });
}

Future<Null> _writePackagesFile() async {
  var config = await findPackageConfig(Directory.current);
  // TODO: remove try/catch when this issue is resolved:
  // https://github.com/dart-lang/package_config/issues/66
  try {
    await savePackageConfig(config, Directory(d.sandbox));
  } catch (_) {
    // If it fails, just write a `.packages` file.
    var packageMap = config.toPackageMap();
    var packagesFileContent = StringBuffer();
    packageMap.forEach((package, location) {
      packagesFileContent.writeln('$package:$location');
    });
    await d.file('.packages', '$packagesFileContent').create();
  }
}