// Copyright (c) 2015, 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.

library source_map_name_test;

import 'package:compiler/src/elements/names.dart';
import 'package:expect/async_helper.dart';
import 'package:expect/expect.dart';
import 'package:compiler/src/commandline_options.dart';
import 'package:compiler/src/common/elements.dart' show JElementEnvironment;
import 'package:compiler/src/compiler.dart';
import 'package:compiler/src/elements/entities.dart';
import 'package:compiler/src/io/kernel_source_information.dart';
import 'package:compiler/src/js_model/js_world.dart';
import 'package:compiler/src/util/memory_compiler.dart';

const String SOURCE = '''

var toplevelField;
toplevelMethod() {}
void toplevelAnonymous() {
  var foo = () {};
}
void toplevelLocal() {
  void localMethod() {}
}

class Class {
  Class() {
    var foo = () {};
  }
  Class.named() {
    void localMethod() {}
  }
  static var staticField;
  static staticMethod() {}
  static void staticAnonymous() {
    var foo = () {};
  }
  static void staticLocal() {
    void localMethod() {}
  }
  var instanceField;
  instanceMethod() {}
  void instanceAnonymous() {
    var foo = () {};
  }
  void instanceLocal() {
    void localMethod() {}
  }
  void instanceNestedLocal() {
    void localMethod() {
      var foo = () {};
      void nestedLocalMethod() {}
    }
  }
}

main() {
  toplevelField = toplevelMethod();
  toplevelAnonymous();
  toplevelLocal();

  Class.staticField = Class.staticMethod;
  Class.staticAnonymous();
  Class.staticLocal();

  var c = Class();
  c = Class.named();
  c.instanceField = c.instanceMethod();
  c.instanceAnonymous();
  c.instanceLocal();
  c.instanceNestedLocal();
}
''';

main() {
  asyncTest(() async {
    CompilationResult result = await runCompiler(
      memorySourceFiles: {'main.dart': SOURCE},
      options: [Flags.disableInlining],
    );
    Compiler compiler = result.compiler!;
    JClosedWorld closedWorld = compiler.backendClosedWorldForTesting!;
    JElementEnvironment env = closedWorld.elementEnvironment;
    LibraryEntity mainApp = env.mainLibrary!;

    check(MemberEntity element, String expectedName) {
      String? name = computeKernelElementNameForSourceMaps(
        closedWorld.elementMap,
        element,
      );
      Expect.equals(
        expectedName,
        name,
        "Unexpected name '$name' for $element, expected '$expectedName'.",
      );
    }

    MemberEntity lookup(String name) {
      MemberEntity? element;
      int dotPosition = name.indexOf('.');
      if (dotPosition != -1) {
        String clsName = name.substring(0, dotPosition);
        ClassEntity? cls = env.lookupClass(mainApp, clsName);
        Expect.isNotNull(cls, "Class '$clsName' not found.");
        var subname = name.substring(dotPosition + 1);
        element =
            env.lookupLocalClassMember(
              cls!,
              Name(subname, cls.library.canonicalUri),
            ) ??
            env.lookupConstructor(cls, subname);
      } else {
        element = env.lookupLibraryMember(mainApp, name);
      }
      Expect.isNotNull(element, "Element '$name' not found.");
      return element!;
    }

    void checkName(
      String expectedName, [
      List<String>? expectedClosureNames,
      String? lookupName,
    ]) {
      if (lookupName == null) {
        lookupName = expectedName;
      }
      dynamic element = lookup(lookupName);
      check(element, expectedName);
      if (element is ConstructorEntity) {
        env.forEachConstructorBody(element.enclosingClass, (body) {
          if (body.name != element.name) return;
          Expect.isNotNull(
            body,
            "Constructor body '${element.name}' not found.",
          );
          check(body, expectedName);
        });
      }

      if (expectedClosureNames != null) {
        int index = 0;
        env.forEachNestedClosure(element, (closure) {
          String expectedName = expectedClosureNames[index];
          check(closure, expectedName);
          index++;
        });
      }
    }

    checkName('toplevelField');
    checkName('toplevelMethod');
    checkName('toplevelAnonymous', ['toplevelAnonymous.<anonymous function>']);
    checkName('toplevelLocal', ['toplevelLocal.localMethod']);
    checkName('main');

    checkName('Class.staticField');
    checkName('Class.staticMethod');
    checkName('Class.staticAnonymous', [
      'Class.staticAnonymous.<anonymous function>',
    ]);
    checkName('Class.staticLocal', ['Class.staticLocal.localMethod']);

    checkName('Class', ['Class.<anonymous function>'], 'Class.');
    checkName('Class.named', ['Class.named.localMethod']);

    checkName('Class.instanceField');
    checkName('Class.instanceMethod');
    checkName('Class.instanceAnonymous', [
      'Class.instanceAnonymous.<anonymous function>',
    ]);
    checkName('Class.instanceLocal', ['Class.instanceLocal.localMethod']);
    checkName('Class.instanceNestedLocal', [
      'Class.instanceNestedLocal.localMethod',
      'Class.instanceNestedLocal.localMethod.<anonymous function>',
      'Class.instanceNestedLocal.localMethod.nestedLocalMethod',
    ]);
  });
}