// Copyright (c) 2020, 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 'dart:io';

import 'package:path/path.dart' as path;
import 'package:test/test.dart';

import '../utils.dart';

void main() {
  group('run', run, timeout: longTimeout);
}

void run() {
  TestProject p;

  tearDown(() => p?.dispose());

  test('--help', () {
    p = project();
    var result = p.runSync('run', ['--help']);

    expect(result.stdout, contains('Run a Dart program.'));
    expect(result.stdout, contains('Debugging options:'));
    expect(result.stderr, isEmpty);
    expect(result.exitCode, 0);
  });

  test("'Hello World'", () {
    p = project(mainSrc: "void main() { print('Hello World'); }");
    ProcessResult result = p.runSync('run', [p.relativeFilePath]);

    expect(result.stdout, contains('Hello World'));
    expect(result.stderr, isEmpty);
    expect(result.exitCode, 0);
  });

  test('--enable-experiment', () {
    p = project();
    p.file('main.dart', "void main() { int a; a = null; print('a is \$a.'); }");
    var result =
        p.runSync('--enable-experiment=non-nullable', ['run', 'main.dart']);

    expect(result.exitCode, 254);
    expect(result.stdout, isEmpty);
    expect(
        result.stderr,
        contains("A value of type 'Null' can't be assigned to a variable of "
            "type 'int'"));
  });

  test('no such file', () {
    p = project(mainSrc: "void main() { print('Hello World'); }");
    ProcessResult result =
        p.runSync('run', ['no/such/file/${p.relativeFilePath}']);

    expect(result.stderr, isNotEmpty);
    expect(result.exitCode, isNot(0));
  });

  test('implicit packageName.dart', () {
    // TODO(jwren) circle back to reimplement this test if possible, the file
    // name (package name) will be the name of the temporary directory on disk
    p = project(mainSrc: "void main() { print('Hello World'); }");
    p.file('bin/main.dart', "void main() { print('Hello main.dart'); }");
    ProcessResult result = p.runSync('run', []);

    expect(result.stdout, contains('Hello main.dart'));
    expect(result.stderr, isEmpty);
    expect(result.exitCode, 0);
  }, skip: true);

  // Could not find the implicit file to run: bin
  test('missing implicit packageName.dart', () {
    p = project(mainSrc: "void main() { print('Hello World'); }");
    p.file('bin/foo.dart', "void main() { print('Hello main.dart'); }");
    ProcessResult result = p.runSync('run', []);

    expect(result.stdout, isEmpty);
    expect(result.stderr,
        contains('Could not find the implicit file to run: bin'));
    expect(result.exitCode, 64);
  });

  test('arguments are properly passed', () {
    p = project();
    p.file('main.dart', 'void main(args) { print(args); }');
    ProcessResult result = p.runSync('run', [
      '--enable-experiment=non-nullable',
      'main.dart',
      'argument1',
      'argument2',
    ]);

    // --enable-experiment and main.dart should not be passed.
    expect(result.stdout, equals('[argument1, argument2]\n'));
    expect(result.stderr, isEmpty);
    expect(result.exitCode, 0);
  });

  test('with absolute file path', () async {
    p = project();
    p.file('main.dart', 'void main(args) { print(args); }');
    // Test with absolute path
    final name = path.join(p.dirPath, 'main.dart');
    final result = p.runSync('run', [
      '--enable-experiment=non-nullable',
      name,
      '--argument1',
      'argument2',
    ]);

    // --enable-experiment and main.dart should not be passed.
    expect(result.stdout, equals('[--argument1, argument2]\n'));
    expect(result.stderr, isEmpty);
    expect(result.exitCode, 0);
  });

  test('with file uri', () async {
    p = project();
    p.file('main.dart', 'void main(args) { print(args); }');
    // Test with File uri
    final name = path.join(p.dirPath, 'main.dart');
    final result = p.runSync('run', [
      '--enable-experiment=non-nullable',
      Uri.file(name).toString(),
      '--argument1',
      'argument2',
    ]);

    // --enable-experiment and main.dart should not be passed.
    expect(result.stdout, equals('[--argument1, argument2]\n'));
    expect(result.stderr, isEmpty);
    expect(result.exitCode, 0);
  });

  test('with accepted VM flags', () async {
    p = project(mainSrc: "void main() { print('Hello World'); }");

    // --observe sets the following flags by default:
    //   --enable-vm-service
    //   --pause-isolate-on-exit
    //   --pause-isolate-on-unhandled-exception
    //   --warn-on-pause-with-no-debugger
    //
    // This test ensures that allowed arguments for dart run which are valid VM
    // arguments are properly handled by the VM.
    ProcessResult result = p.runSync('run', [
      '--observe',
      '--pause-isolates-on-start',
      // This should negate the above flag.
      '--no-pause-isolates-on-start',
      '--no-pause-isolates-on-exit',
      '--no-pause-isolates-on-unhandled-exceptions',
      p.relativeFilePath,
    ]);

    expect(
      result.stdout,
      contains('Observatory listening on'),
    );
    expect(result.stderr, isEmpty);
    expect(result.exitCode, 0);
  });

  test('fails when provided verbose VM flags', () async {
    p = project(mainSrc: "void main() { print('Hello World'); }");

    // Any VM flags not listed under 'dart run help --verbose' should be passed
    // before a dartdev command.
    ProcessResult result = p.runSync('run', [
      '--vm-name=foo',
      p.relativeFilePath,
    ]);

    expect(result.stdout, isEmpty);
    expect(
      result.stderr,
      contains('Could not find an option named "vm-name".'),
    );
    expect(result.exitCode, 64);
  });

  test('fails when provided unlisted VM flags', () async {
    p = project(mainSrc: "void main() { print('Hello World'); }");

    // Any VM flags not listed under 'dart run help --verbose' should be passed
    // before a dartdev command.
    ProcessResult result = p.runSync('run', [
      '--verbose_gc',
      p.relativeFilePath,
    ]);

    expect(result.stdout, isEmpty);
    expect(
      result.stderr,
      contains('Could not find an option named "verbose_gc".'),
    );
    expect(result.exitCode, 64);
  });

  test('--enable-asserts', () async {
    p = project(mainSrc: 'void main() { assert(false); }');

    // Ensure --enable-asserts doesn't cause the dartdev isolate to fail to
    // load. Regression test for: https://github.com/dart-lang/sdk/issues/42831
    ProcessResult result = p.runSync('run', [
      '--enable-asserts',
      p.relativeFilePath,
    ]);

    expect(result.stdout, isEmpty);
    expect(result.stderr, contains('Unhandled exception'));
    expect(result.exitCode, 255);
  });
}