// 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.

/// Check that 'dart:' libraries have their corresponding dart.library.X
/// environment variable set.

import 'dart:async';

import 'memory_source_file_helper.dart';

import "package:async_helper/async_helper.dart";

import 'package:expect/expect.dart' show Expect;

import 'package:compiler/src/null_compiler_output.dart' show NullCompilerOutput;

import 'package:compiler/src/options.dart' show CompilerOptions;

import 'package:compiler/src/io/source_file.dart' show Binary;

import 'package:compiler/compiler_new.dart'
    show CompilerInput, CompilerDiagnostics, Input, InputKind;

const String clientPlatform = r'''
[dart-spec]
spec: 3rd edition.

[features]
# No extra features

[libraries]
mock.client: mock1.dart
mock.shared: mock3.dart
collection: collection/collection.dart
html: html/dart2js/html_dart2js.dart
''';

const String serverPlatform = r'''
[dart-spec]
spec: 3rd edition.

[features]
# No extra features

[libraries]
mock.server: mock2.dart
mock.shared: mock3.dart
collection: collection/collection.dart
io: io/io.dart
''';

class DummyCompilerInput implements CompilerInput {
  const DummyCompilerInput();

  Future<Input> readFromUri(Uri uri,
      {InputKind inputKind: InputKind.utf8}) async {
    if (uri.toString().endsWith("dart_client.platform")) {
      return new Binary(uri, clientPlatform.codeUnits);
    } else if (uri.toString().endsWith("dart_server.platform")) {
      return new Binary(uri, serverPlatform.codeUnits);
    } else {
      throw "should not be needed $uri";
    }
  }
}

class DummyCompilerDiagnostics implements CompilerDiagnostics {
  const DummyCompilerDiagnostics();

  report(code, uri, begin, end, text, kind) {
    throw "should not be needed";
  }
}

class CustomCompiler extends CompilerImpl {
  CustomCompiler(options, environment)
      : super(
            const DummyCompilerInput(),
            const NullCompilerOutput(),
            const DummyCompilerDiagnostics(),
            new CompilerOptions.parse(
                libraryRoot: Uri.base.resolve("sdk/"),
                options: options,
                environment: environment));
}

runTest() async {
  var compiler = new CustomCompiler([], {});

  await compiler.setupSdk();

  // Core libraries are always present.
  Expect.equals("true", compiler.fromEnvironment("dart.library.collection"));
  // Non-existing entries in the environment return 'null'.
  Expect.isNull(compiler.fromEnvironment("not in env"));
  // Check for client libraries (default if there are no flags to the compiler).
  Expect.equals("true", compiler.fromEnvironment("dart.library.mock.client"));
  Expect.equals("true", compiler.fromEnvironment("dart.library.html"));
  // Check for shared libraries..
  Expect.equals("true", compiler.fromEnvironment("dart.library.mock.shared"));
  // Check server libraries are not present.
  Expect.equals(null, compiler.fromEnvironment("dart.library.mock.server"));
  Expect.equals(null, compiler.fromEnvironment("dart.library.io"));

  compiler = new CustomCompiler(['--categories=Server'], {});

  await compiler.setupSdk();

  // Core libraries are always present.
  Expect.equals("true", compiler.fromEnvironment("dart.library.collection"));
  // Non-existing entries in the environment return 'null'.
  Expect.isNull(compiler.fromEnvironment("not in env"));
  // Check client libraries are not present.
  Expect.equals(null, compiler.fromEnvironment("dart.library.mock.client"));
  Expect.equals(null, compiler.fromEnvironment("dart.library.html"));
  // Check for shared libraries..
  Expect.equals("true", compiler.fromEnvironment("dart.library.mock.shared"));
  // Check for server libraries.
  Expect.equals("true", compiler.fromEnvironment("dart.library.mock.server"));
  Expect.equals("true", compiler.fromEnvironment("dart.library.io"));

  // Check that user-defined env-variables win.
  compiler = new CustomCompiler([],
      {'dart.library.collection': "false", 'dart.library.mock.client': "foo"});

  await compiler.setupSdk();

  Expect.equals("false", compiler.fromEnvironment("dart.library.collection"));
  Expect.equals("foo", compiler.fromEnvironment("dart.library.mock.client"));
}

main() {
  asyncStart();
  runTest().then((_) {
    asyncEnd();
  });
}