// 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.

// Partial test that the closed world computed from [WorldImpact]s derived from
// kernel is equivalent to the original computed from resolution.
library dart2js.kernel.closed_world_from_dill_test;

import 'dart:async';
import 'dart:io';

import 'package:async_helper/async_helper.dart';
import 'package:compiler/src/commandline_options.dart';
import 'package:compiler/src/common.dart';
import 'package:compiler/src/compiler.dart';
import 'package:compiler/src/elements/types.dart';
import 'package:compiler/src/enqueue.dart';
import 'package:compiler/src/kernel/element_map.dart';
import 'package:compiler/src/kernel/kernel_strategy.dart';
import 'package:compiler/src/universe/world_builder.dart';
import 'package:compiler/src/world.dart';
import 'package:expect/expect.dart';
import '../memory_compiler.dart';
import '../equivalence/check_functions.dart';
import '../serialization/helper.dart';
import 'test_helpers.dart';

import 'compiler_helper.dart';

const SOURCE = const {
  'main.dart': '''
import 'dart:html';
import 'dart:typed_data';
import 'package:expect/expect.dart';

class ClassWithSetter {
  void set setter(_) {}
}

class Mixin {
  method1() {}
  method2() {}
  method3() {}
  method4() {}
  var field;
  get property => 0;
  set property(_) {}
}
class Class1 = Object with Mixin;
class Class2 extends Object with Mixin {
  method3() {}
  method5() {
    super.method4();
    super.property;
    super.property = null;
    super.field;
    super.field = null;
  }
}
 
method1() {} // Deliberately the same name as the instance member in Mixin.

@NoInline()
main() {
  print('Hello World');
  ''.contains; // Trigger member closurization.
  new ClassWithSetter().setter = null;
  new Class1().method1();
  new Class2().method2();
  new Class2().method3();
  new Class2().method5();
  new Element.div();
  null is List<int>; // Use generic test
  method1(); // Both top level and instance method named 'method1' are live.
  #main; // Use a const symbol.
  const Symbol('foo'); // Use the const Symbol constructor directly
  new Int8List(0); // Use redirect factory to abstract native class
}
'''
};

main(List<String> args) {
  asyncTest(() async {
    await mainInternal(args);
  });
}

enum ResultKind { crashes, errors, warnings, success, failure }

Future<ResultKind> mainInternal(List<String> args,
    {bool skipWarnings: false, bool skipErrors: false}) async {
  Arguments arguments = new Arguments.from(args);
  Uri entryPoint;
  Map<String, String> memorySourceFiles;
  if (arguments.uri != null) {
    entryPoint = arguments.uri;
    memorySourceFiles = const <String, String>{};
  } else {
    entryPoint = Uri.parse('memory:main.dart');
    memorySourceFiles = SOURCE;
  }

  enableDebugMode();

  Directory dir = await Directory.systemTemp.createTemp('dart2js-with-dill');
  print('--- create temp directory $dir -------------------------------');
  memorySourceFiles.forEach((String name, String source) {
    new File.fromUri(dir.uri.resolve(name)).writeAsStringSync(source);
  });
  entryPoint = dir.uri.resolve(entryPoint.path);

  print('---- analyze-only ------------------------------------------------');
  DiagnosticCollector collector = new DiagnosticCollector();
  ElementResolutionWorldBuilder.useInstantiationMap = true;
  CompilationResult result = await runCompiler(
      entryPoint: entryPoint,
      diagnosticHandler: collector,
      options: [
        Flags.useOldFrontend,
        Flags.analyzeOnly,
        Flags.enableAssertMessage
      ],
      beforeRun: (compiler) {
        compiler.impactCacheDeleter.retainCachesForTesting = true;
      });
  Compiler compiler1 = result.compiler;
  if (collector.crashes.isNotEmpty) {
    print('Skipping due to crashes.');
    return ResultKind.crashes;
  }
  if (collector.errors.isNotEmpty && skipErrors) {
    print('Skipping due to errors.');
    return ResultKind.errors;
  }
  if (collector.warnings.isNotEmpty && skipWarnings) {
    print('Skipping due to warnings.');
    return ResultKind.warnings;
  }
  Expect.isFalse(compiler1.compilationFailed);
  ResolutionEnqueuer enqueuer1 = compiler1.enqueuer.resolution;
  ClosedWorld closedWorld1 = compiler1.resolutionWorldBuilder.closeWorld();

  Compiler compiler2 = await compileWithDill(
      entryPoint: entryPoint,
      options: [Flags.analyzeOnly, Flags.enableAssertMessage],
      printSteps: true);

  KernelFrontEndStrategy frontendStrategy = compiler2.frontendStrategy;
  KernelToElementMap elementMap = frontendStrategy.elementMap;

  Expect.isFalse(compiler2.compilationFailed);

  KernelEquivalence equivalence = new KernelEquivalence(elementMap);

  ResolutionEnqueuer enqueuer2 = compiler2.enqueuer.resolution;
  ClosedWorld closedWorld2 = compiler2.resolutionWorldBuilder.closeWorld();

  checkBackendUsage(closedWorld1.backendUsage, closedWorld2.backendUsage,
      equivalence.defaultStrategy);

  checkResolutionEnqueuers(closedWorld1.backendUsage, closedWorld2.backendUsage,
      enqueuer1, enqueuer2,
      elementEquivalence: (a, b) => equivalence.entityEquivalence(a, b),
      typeEquivalence: (DartType a, DartType b) {
        return equivalence.typeEquivalence(unalias(a), b);
      },
      elementFilter: elementFilter,
      verbose: arguments.verbose);

  checkClosedWorlds(closedWorld1, closedWorld2,
      strategy: equivalence.defaultStrategy, verbose: arguments.verbose);

  return ResultKind.success;
}