// Copyright (c) 2013, 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 'package:async_helper/async_helper.dart';
import 'package:expect/expect.dart';
import 'package:compiler/src/types/types.dart';

import 'compiler_helper.dart';

const String CODE = """
class A {}
class B extends A {}
class C implements A {}
class D implements A {}
main() {
  print([new A(), new B(), new C(), new D()]);
}
""";

main() {
  Uri uri = new Uri(scheme: 'source');
  var compiler = compilerFor(CODE, uri);
  asyncTest(() => compiler.run(uri).then((_) {
        var closedWorld = compiler.resolutionWorldBuilder.closedWorldForTesting;
        var classA = findElement(compiler, 'A');
        var classB = findElement(compiler, 'B');
        var classC = findElement(compiler, 'C');
        var classD = findElement(compiler, 'D');

        var exactA = new TypeMask.nonNullExact(classA, closedWorld);
        var exactB = new TypeMask.nonNullExact(classB, closedWorld);
        var exactC = new TypeMask.nonNullExact(classC, closedWorld);
        var exactD = new TypeMask.nonNullExact(classD, closedWorld);

        var subclassA = new TypeMask.nonNullSubclass(classA, closedWorld);
        var subtypeA = new TypeMask.nonNullSubtype(classA, closedWorld);

        var subclassObject = new TypeMask.nonNullSubclass(
            compiler.commonElements.objectClass, closedWorld);

        var unionABC =
            UnionTypeMask.unionOf([exactA, exactB, exactC], closedWorld);
        var unionABnC = UnionTypeMask
            .unionOf([exactA, exactB.nullable(), exactC], closedWorld);
        var unionAB = UnionTypeMask.unionOf([exactA, exactB], closedWorld);
        var unionSubtypeAC =
            UnionTypeMask.unionOf([subtypeA, exactC], closedWorld);
        var unionSubclassAC =
            UnionTypeMask.unionOf([subclassA, exactC], closedWorld);
        var unionBCD =
            UnionTypeMask.unionOf([exactB, exactC, exactD], closedWorld);
        var unionBCDn = UnionTypeMask
            .unionOf([exactB, exactC, exactD.nullable()], closedWorld);

        Expect.isFalse(unionABC.isNullable);
        Expect.isTrue(unionABnC.isNullable);
        Expect.isFalse(unionBCD.isNullable);
        Expect.isTrue(unionBCDn.isNullable);

        rule(a, b, c) => Expect.equals(c, a.isInMask(b, closedWorld));

        rule(exactA, exactA, true);
        rule(exactA, exactB, false);
        rule(exactA, exactC, false);
        rule(exactA, subclassA, true);
        rule(exactA, subtypeA, true);

        rule(exactB, exactA, false);
        rule(exactB, exactB, true);
        rule(exactB, exactC, false);
        rule(exactB, subclassA, true);
        rule(exactB, subtypeA, true);

        rule(exactC, exactA, false);
        rule(exactC, exactB, false);
        rule(exactC, exactC, true);
        rule(exactC, subclassA, false);
        rule(exactC, subtypeA, true);

        rule(subclassA, exactA, false);
        rule(subclassA, exactB, false);
        rule(subclassA, exactC, false);
        rule(subclassA, subclassA, true);
        rule(subclassA, subtypeA, true);

        rule(subtypeA, exactA, false);
        rule(subtypeA, exactB, false);
        rule(subtypeA, exactC, false);
        rule(subtypeA, subclassA, false);
        rule(subtypeA, subtypeA, true);

        rule(unionABC, unionSubtypeAC, true);
        rule(unionSubtypeAC, unionABC, true);
        rule(unionAB, unionSubtypeAC, true);
        rule(unionSubtypeAC, unionAB, false);
        rule(unionABC, unionSubclassAC, true);
        rule(unionSubclassAC, unionABC, true);
        rule(unionAB, unionSubclassAC, true);
        rule(unionSubclassAC, unionAB, false);
        rule(unionAB, subclassA, true);
        rule(subclassA, unionAB, true);
        rule(unionABC, subtypeA, true);
        rule(subtypeA, unionABC, true);
        rule(unionABC, subclassA, false);
        rule(subclassA, unionABC, true);
        rule(unionAB, subclassA, true);
        rule(subclassA, unionAB, true);

        rule(exactA, subclassObject, true);
        rule(exactB, subclassObject, true);
        rule(subclassA, subclassObject, true);
        rule(subtypeA, subclassObject, true);
        rule(unionABC, subclassObject, true);
        rule(unionAB, subclassObject, true);
        rule(unionSubtypeAC, subclassObject, true);
        rule(unionSubclassAC, subclassObject, true);

        rule(unionABnC, unionABC, false);
        rule(unionABC, unionABnC, true);
        rule(exactA.nullable(), unionABnC, true);
        rule(exactA.nullable(), unionABC, false);
        rule(exactB, unionABnC, true);
        rule(unionBCDn, unionBCD, false);
        rule(unionBCD, unionBCDn, true);
        rule(exactB.nullable(), unionBCDn, true);
        rule(exactB.nullable(), unionBCD, false);
      }));
}