// 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.

library fasta.dill_class_builder;

import 'package:kernel/ast.dart' show Class, Member, TypeParameter, DartType;

import 'package:kernel/type_algebra.dart' show calculateBounds;

import '../problems.dart' show unimplemented;

import '../kernel/kernel_builder.dart'
    show
        MemberBuilder,
        KernelClassBuilder,
        KernelTypeBuilder,
        Scope,
        TypeBuilder;

import '../modifier.dart' show abstractMask;

import 'dill_member_builder.dart' show DillMemberBuilder;

import 'dill_library_builder.dart' show DillLibraryBuilder;

import 'built_type_builder.dart' show BuiltTypeBuilder;

class DillClassBuilder extends KernelClassBuilder {
  final Class cls;

  DillClassBuilder(Class cls, DillLibraryBuilder parent)
      : cls = cls,
        super(
            null,
            computeModifiers(cls),
            cls.name,
            null,
            null,
            null,
            new Scope(<String, MemberBuilder>{}, <String, MemberBuilder>{},
                parent.scope, "class ${cls.name}", isModifiable: false),
            new Scope(<String, MemberBuilder>{}, null, null, "constructors",
                isModifiable: false),
            parent,
            cls.fileOffset);

  @override
  Class get actualCls => cls;

  void addMember(Member member) {
    DillMemberBuilder builder = new DillMemberBuilder(member, this);
    String name = member.name.name;
    if (builder.isConstructor || builder.isFactory) {
      constructorScopeBuilder.addMember(name, builder);
    } else if (builder.isSetter) {
      scopeBuilder.addSetter(name, builder);
    } else {
      scopeBuilder.addMember(name, builder);
    }
  }

  List<TypeBuilder> get calculatedBounds {
    if (super.calculatedBounds != null) {
      return super.calculatedBounds;
    }
    DillLibraryBuilder parentLibraryBuilder = parent;
    DillClassBuilder objectClassBuilder =
        parentLibraryBuilder.loader.coreLibrary["Object"];
    Class objectClass = objectClassBuilder.cls;
    List<TypeParameter> targetTypeParameters = target.typeParameters;
    List<DartType> calculatedBoundTypes =
        calculateBounds(targetTypeParameters, objectClass);
    List<TypeBuilder> result =
        new List<BuiltTypeBuilder>(targetTypeParameters.length);
    for (int i = 0; i < result.length; i++) {
      result[i] = new BuiltTypeBuilder(calculatedBoundTypes[i]);
    }
    super.calculatedBounds = result;
    return super.calculatedBounds;
  }

  /// Returns true if this class is the result of applying a mixin to its
  /// superclass.
  bool get isMixinApplication => cls.isMixinApplication;

  KernelTypeBuilder get mixedInType => unimplemented("mixedInType", -1, null);

  void set mixedInType(KernelTypeBuilder mixin) {
    unimplemented("mixedInType=", -1, null);
  }
}

int computeModifiers(Class cls) {
  return cls.isAbstract ? abstractMask : 0;
}