// Copyright (c) 2017, 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:async';
import 'dart:io';
import 'memory_compiler.dart';
import 'package:async_helper/async_helper.dart';
import 'package:compiler/src/commandline_options.dart';
import 'package:compiler/src/common_elements.dart';
import 'package:compiler/src/diagnostics/spannable.dart' show Spannable;
import 'package:compiler/src/elements/entities.dart'
    show LibraryEntity, ClassEntity;
import 'package:compiler/src/io/source_file.dart' show Binary;
import 'package:compiler/src/library_loader.dart' show ScriptLoader;
import 'package:compiler/src/script.dart' show Script;
import 'package:compiler/src/apiimpl.dart' show CompilerImpl;
import "package:expect/expect.dart";
import 'package:front_end/front_end.dart';
import 'package:front_end/src/fasta/kernel/utils.dart' show serializeProgram;
import 'package:compiler/src/kernel/dart2js_target.dart';
import 'package:kernel/target/targets.dart' show TargetFlags;

class TestScriptLoader implements ScriptLoader {
  CompilerImpl compiler;
  TestScriptLoader(this.compiler);

  Future<Script> readScript(Uri uri, [Spannable spannable]) =>
      compiler.readScript(uri, spannable);

  Future<Binary> readBinary(Uri uri, [Spannable spannable]) =>
      compiler.readBinary(uri, spannable);
}

/// Test that the compiler can successfully read in .dill kernel files rather
/// than just string source files.
main() {
  asyncTest(() async {
    String filename = 'tests/corelib/list_literal_test.dart';
    Uri uri = Uri.base.resolve(filename);
    DiagnosticCollector diagnostics = new DiagnosticCollector();
    OutputCollector output = new OutputCollector();
    Uri entryPoint = Uri.parse('memory:main.dill');

    String buildDir = Platform.isMacOS ? 'xcodebuild' : 'out';
    String configuration =
        Platform.environment['DART_CONFIGURATION'] ?? 'ReleaseX64';
    var platform = Platform.script.resolve(
        '../../../$buildDir/$configuration/patched_dart2js_sdk/platform.dill');
    var options = new CompilerOptions()
      ..target = new Dart2jsTarget(new TargetFlags())
      ..packagesFileUri = Platform.script.resolve('../../../.packages')
      ..compileSdk = true
      ..linkedDependencies = [platform]
      ..setExitCodeOnProblem = true
      ..verify = true;

    List<int> kernelBinary =
        serializeProgram(await kernelForProgram(uri, options));
    CompilerImpl compiler = compilerFor(
        entryPoint: entryPoint,
        memorySourceFiles: {'main.dill': kernelBinary},
        diagnosticHandler: diagnostics,
        outputProvider: output,
        options: [Flags.loadFromDill]);
    await compiler.setupSdk();
    await compiler.libraryLoader.loadLibrary(entryPoint);

    Expect.equals(0, diagnostics.errors.length);
    Expect.equals(0, diagnostics.warnings.length);

    ElementEnvironment environment =
        compiler.frontendStrategy.elementEnvironment;
    LibraryEntity library = environment.lookupLibrary(uri);
    Expect.isNotNull(library);
    ClassEntity clss = environment.lookupClass(library, 'ListLiteralTest');
    Expect.isNotNull(clss);
    var member = environment.lookupClassMember(clss, 'testMain');
    Expect.isNotNull(member);
  });
}