// Copyright (c) 2016, 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.

@deprecated
library analyzer.test.constant_test;

import 'package:analyzer/src/dart/element/element.dart';
import 'package:analyzer/src/generated/constant.dart';
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

import '../src/dart/resolution/context_collection_resolution.dart';

main() {
  defineReflectiveSuite(() {
    defineReflectiveTests(ConstantEvaluatorTest);
  });
}

@reflectiveTest
class ConstantEvaluatorTest extends PubPackageResolutionTest {
  void assertTypeArguments(DartObject value, List<String>? typeArgumentNames) {
    var typeArguments = (value as DartObjectImpl).typeArguments;
    if (typeArguments == null) {
      expect(typeArguments, typeArgumentNames);
      return;
    }
    expect(
      typeArguments.map((arg) => arg.getDisplayString(withNullability: true)),
      equals(typeArgumentNames),
    );
  }

  test_bitAnd_int_int() async {
    await _assertValueInt(74 & 42, "74 & 42");
  }

  test_bitNot() async {
    await _assertValueInt(~42, "~42");
  }

  test_bitOr_int_int() async {
    await _assertValueInt(74 | 42, "74 | 42");
  }

  test_bitXor_int_int() async {
    await _assertValueInt(74 ^ 42, "74 ^ 42");
  }

  test_constructorInvocation_fieldInitializer() async {
    var result = await _getExpressionValue("const C(2)", context: '''
class C {
  final int x;
  const C(this.x);
}
''');
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, 'C');
    DartObject x = value.getField('x')!;
    assertType(x.type, 'int');
    expect(x.toIntValue(), 2);
  }

  test_constructorInvocation_noArgs() async {
    var result = await _getExpressionValue(
      "const C()",
      context: 'class C {const C();}',
    );
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, 'C');
  }

  test_constructorInvocation_noConstConstructor() async {
    var result = await _getExpressionValue(
      "const C()",
      context: 'class C {}',
    );
    expect(result.isValid, isFalse);
    var value = result.value;
    expect(value, isNull);
  }

  test_constructorInvocation_simpleArgs() async {
    var result = await _getExpressionValue("const C(1)", context: '''
class C {
  const C(int x);
}
''');
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, 'C');
  }

  test_constructorReference_generic_named() async {
    var result = await _getExpressionValue("C<int>.foo", context: '''
class C<T> {
  C.foo();
}
''');
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, 'C<int> Function()');
  }

  test_constructorReference_generic_unnamed() async {
    var result = await _getExpressionValue("C<int>.new", context: '''
class C<T> {
  C.new();
}
''');
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, 'C<int> Function()');
  }

  test_constructorReference_nonGeneric_named() async {
    var result = await _getExpressionValue("C.foo", context: '''
class C {
  const C.foo();
}
''');
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, 'C Function()');
  }

  test_constructorReference_nonGeneric_unnamed() async {
    var result = await _getExpressionValue("C.new", context: '''
class C {
  const C();
}
''');
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, 'C Function()');
  }

  test_divide_double_double() async {
    await _assertValueDouble(3.2 / 2.3, "3.2 / 2.3");
  }

  test_divide_double_double_byZero() async {
    var result = await _getExpressionValue("3.2 / 0.0");
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, "double");
    expect(value.toDoubleValue()!.isInfinite, isTrue);
  }

  test_divide_int_int() async {
    await _assertValueDouble(1.5, "3 / 2");
  }

  test_divide_int_int_byZero() async {
    var result = await _getExpressionValue("3 / 0");
    expect(result.isValid, isTrue);
  }

  test_equal_boolean_boolean() async {
    await _assertValueBool(false, "true == false");
  }

  test_equal_int_int() async {
    await _assertValueBool(false, "2 == 3");
  }

  test_equal_invalidLeft() async {
    var result = await _getExpressionValue("a == 3");
    expect(result.isValid, isFalse);
  }

  test_equal_invalidRight() async {
    var result = await _getExpressionValue("2 == a");
    expect(result.isValid, isFalse);
  }

  test_equal_string_string() async {
    await _assertValueBool(false, "'a' == 'b'");
  }

  test_greaterThan_int_int() async {
    await _assertValueBool(false, "2 > 3");
  }

  test_greaterThanOrEqual_int_int() async {
    await _assertValueBool(false, "2 >= 3");
  }

  @failingTest
  test_identifier_class() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_identifier_function() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_identifier_static() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_identifier_staticMethod() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_identifier_topLevel() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_identifier_typeParameter() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  test_lessThan_int_int() async {
    await _assertValueBool(true, "2 < 3");
  }

  test_lessThanOrEqual_int_int() async {
    await _assertValueBool(true, "2 <= 3");
  }

  test_literal_boolean_false() async {
    await _assertValueBool(false, "false");
  }

  test_literal_boolean_true() async {
    await _assertValueBool(true, "true");
  }

  test_literal_list() async {
    var result = await _getExpressionValue("const ['a', 'b', 'c']");
    expect(result.isValid, isTrue);
  }

  test_literal_list_explicitType() async {
    var result = await _getExpressionValue("const <String>['a', 'b', 'c']");
    expect(result.isValid, isTrue);
  }

  test_literal_list_explicitType_functionType() async {
    var result = await _getExpressionValue("const <void Function()>[]");
    expect(result.isValid, isTrue);
  }

  test_literal_list_forElement() async {
    var result = await _getExpressionValue('''
const [for (var i = 0; i < 4; i++) i]
''');
    expect(result.isValid, isFalse);
    expect(result.errors, isNotEmpty);
  }

  test_literal_map() async {
    var result = await _getExpressionValue(
      "const {'a' : 'm', 'b' : 'n', 'c' : 'o'}",
    );
    expect(result.isValid, isTrue);
    var map = result.value!.toMapValue()!;
    expect(map.keys.map((k) => k!.toStringValue()), ['a', 'b', 'c']);
  }

  test_literal_null() async {
    var result = await _getExpressionValue("null");
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    expect(value.isNull, isTrue);
  }

  test_literal_number_double() async {
    await _assertValueDouble(3.45, "3.45");
  }

  test_literal_number_integer() async {
    await _assertValueInt(42, "42");
  }

  test_literal_string_adjacent() async {
    await _assertValueString("abcdef", "'abc' 'def'");
  }

  test_literal_string_interpolation_invalid() async {
    var result = await _getExpressionValue("'a\${f()}c'");
    expect(result.isValid, isFalse);
  }

  test_literal_string_interpolation_valid() async {
    await _assertValueString("a3c", "'a\${3}c'");
  }

  test_literal_string_simple() async {
    await _assertValueString("abc", "'abc'");
  }

  test_logicalAnd() async {
    await _assertValueBool(false, "true && false");
  }

  test_logicalNot() async {
    await _assertValueBool(false, "!true");
  }

  test_logicalOr() async {
    await _assertValueBool(true, "true || false");
  }

  test_minus_double_double() async {
    await _assertValueDouble(3.2 - 2.3, "3.2 - 2.3");
  }

  test_minus_int_int() async {
    await _assertValueInt(1, "3 - 2");
  }

  test_negated_boolean() async {
    var result = await _getExpressionValue("-true");
    expect(result.isValid, isFalse);
  }

  test_negated_double() async {
    await _assertValueDouble(-42.3, "-42.3");
  }

  test_negated_integer() async {
    await _assertValueInt(-42, "-42");
  }

  test_notEqual_boolean_boolean() async {
    await _assertValueBool(true, "true != false");
  }

  test_notEqual_int_int() async {
    await _assertValueBool(true, "2 != 3");
  }

  test_notEqual_invalidLeft() async {
    var result = await _getExpressionValue("a != 3");
    expect(result.isValid, isFalse);
  }

  test_notEqual_invalidRight() async {
    var result = await _getExpressionValue("2 != a");
    expect(result.isValid, isFalse);
  }

  test_notEqual_string_string() async {
    await _assertValueBool(true, "'a' != 'b'");
  }

  test_parenthesizedExpression() async {
    await _assertValueString("a", "('a')");
  }

  test_plus_double_double() async {
    await _assertValueDouble(2.3 + 3.2, "2.3 + 3.2");
  }

  test_plus_int_int() async {
    await _assertValueInt(5, "2 + 3");
  }

  test_plus_string_string() async {
    await _assertValueString("ab", "'a' + 'b'");
  }

  @failingTest
  test_prefixedIdentifier_invalid() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_prefixedIdentifier_valid() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_propertyAccess_invalid() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_propertyAccess_valid() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_simpleIdentifier_invalid() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  @failingTest
  test_simpleIdentifier_valid() async {
    var result = await _getExpressionValue("?");
    expect(result.isValid, isTrue);
    var value = result.value;
    expect(value, null);
  }

  test_stringLength_complex() async {
    await _assertValueInt(6, "('qwe' + 'rty').length");
  }

  test_stringLength_simple() async {
    await _assertValueInt(6, "'Dvorak'.length");
  }

  Future<void> _assertValueBool(bool expectedValue, String contents) async {
    var result = await _getExpressionValue(contents);
    DartObject value = result.value!;
    assertType(value.type, "bool");
    expect(value.toBoolValue(), expectedValue);
  }

  Future<void> _assertValueDouble(double expectedValue, String contents) async {
    var result = await _getExpressionValue(contents);
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, "double");
    expect(value.toDoubleValue(), expectedValue);
  }

  Future<void> _assertValueInt(int expectedValue, String contents) async {
    var result = await _getExpressionValue(contents);
    expect(result.isValid, isTrue);
    DartObject value = result.value!;
    assertType(value.type, "int");
    expect(value.toIntValue(), expectedValue);
  }

  Future<void> _assertValueString(String expectedValue, String contents) async {
    var result = await _getExpressionValue(contents);
    DartObject value = result.value!;
    assertType(value.type, 'String');
  }

  Future<EvaluationResult> _getExpressionValue(String expressionCode,
      {String context = ''}) async {
    await resolveTestCode('''
var x = $expressionCode;

$context
''');

    var expression = findNode.variableDeclaration('x =').initializer!;

    var file = getFile(result.path);
    var evaluator = ConstantEvaluator(
      file.createSource(result.uri),
      result.libraryElement as LibraryElementImpl,
    );

    return evaluator.evaluate(expression);
  }
}