// Copyright (c) 2014, 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 test.integration.search.domain;

import 'dart:async';

import 'package:analysis_testing/reflective_tests.dart';
import 'package:unittest/unittest.dart';

import '../integration_tests.dart';

/**
 * Results of a getTypeHierarchy request, processed for easier testing.
 */
class HierarchyResults {
  /**
   * The list of hierarchy items from the result.
   */
  List<Map> items;

  /**
   * The first hierarchy item from the result, which represents the pivot
   * class.
   */
  Map pivot;

  /**
   * A map from element name to item index.
   */
  Map<String, int> nameToIndex;

  /**
   * Create a [HierarchyResults] object based on the result from a
   * getTypeHierarchy request.
   */
  HierarchyResults(result) {
    items = result['hierarchyItems'];
    pivot = items[0];
    nameToIndex = <String, int> {};
    for (int i = 0; i < items.length; i++) {
      nameToIndex[items[i]['classElement']['name']] = i;
    }
  }

  /**
   * Get an item by class name.
   */
  Map getItem(String name) {
    if (nameToIndex.containsKey(name)) {
      return items[nameToIndex[name]];
    } else {
      fail('Class $name not found in hierarchy results');
      return null;
    }
  }
}

@ReflectiveTestCase()
class Test extends AbstractAnalysisServerIntegrationTest
    {
  /**
   * Pathname of the main file to run tests in.
   */
  String pathname;

  test_getTypeHierarchy() {
    pathname = sourcePath('test.dart');
    // Write a dummy file which will be overridden by tests using
    // [sendAnalysisUpdateContent].
    writeFile(pathname, '// dummy');
    standardAnalysisSetup();

    // Run all the getTypeHierarchy tests at once so that the server can take
    // advantage of incremental analysis and the test doesn't time out.
    List tests = [getTypeHierarchy_classElement, getTypeHierarchy_displayName,
        getTypeHierarchy_memberElement, getTypeHierarchy_superclass,
        getTypeHierarchy_interfaces, getTypeHierarchy_mixins,
        getTypeHierarchy_subclasses, getTypeHierarchy_badTarget,
        getTypeHierarchy_functionTarget];
    return Future.forEach(tests, (test) => test());
  }

  Future getTypeHierarchy_classElement() {
    String text =
        r'''
class Base {}
class Pivot /* target */ extends Base {}
class Derived extends Pivot {}
''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results.items, hasLength(4));
      expect(results.nameToIndex['Pivot'], equals(0));
      void checkElement(String name) {
        // We don't check the full element data structure; just enough to make
        // sure that we're pointing to the correct element.
        Map element = results.items[results.nameToIndex[name]]['classElement'];
        expect(element['kind'], equals('CLASS'));
        expect(element['name'], equals(name));
        if (name != 'Object') {
          expect(element['location']['offset'], equals(text.indexOf(
              'class $name') + 'class '.length));
        }
      }
      checkElement('Object');
      checkElement('Base');
      checkElement('Pivot');
      checkElement('Derived');
    });
  }

  Future getTypeHierarchy_displayName() {
    String text =
        r'''
class Base<T> {}
class Pivot /* target */ extends Base<int> {}
''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results.items, hasLength(3));
      expect(results.getItem('Object')['displayName'], isNull);
      expect(results.getItem('Base')['displayName'], equals('Base<int>'));
      expect(results.getItem('Pivot')['displayName'], isNull);
    });
  }

  Future getTypeHierarchy_memberElement() {
    String text =
        r'''
class Base1 {
  void foo /* base1 */ ();
}
class Base2 extends Base1 {}
class Pivot extends Base2 {
  void foo /* target */ ();
}
class Derived1 extends Pivot {}
class Derived2 extends Derived1 {
  void foo /* derived2 */ ();
}''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results.items, hasLength(6));
      expect(results.getItem('Object')['memberElement'], isNull);
      expect(results.getItem('Base1')['memberElement']['location']['offset'],
          equals(text.indexOf('foo /* base1 */')));
      expect(results.getItem('Base2')['memberElement'], isNull);
      expect(results.getItem('Pivot')['memberElement']['location']['offset'],
          equals(text.indexOf('foo /* target */')));
      expect(results.getItem('Derived1')['memberElement'], isNull);
      expect(results.getItem('Derived2')['memberElement']['location']['offset'],
          equals(text.indexOf('foo /* derived2 */')));
    });
  }

  Future getTypeHierarchy_superclass() {
    String text =
        r'''
class Base1 {}
class Base2 extends Base1 {}
class Pivot /* target */ extends Base2 {}
''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results.items, hasLength(4));
      expect(results.getItem('Object')['superclass'], isNull);
      expect(results.getItem('Base1')['superclass'], equals(
          results.nameToIndex['Object']));
      expect(results.getItem('Base2')['superclass'], equals(
          results.nameToIndex['Base1']));
      expect(results.getItem('Pivot')['superclass'], equals(
          results.nameToIndex['Base2']));
    });
  }

  Future getTypeHierarchy_interfaces() {
    String text =
        r'''
class Interface1 {}
class Interface2 {}
class Pivot /* target */ implements Interface1, Interface2 {}
''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results.items, hasLength(4));
      expect(results.pivot['interfaces'], hasLength(2));
      expect(results.pivot['interfaces'], contains(
          results.nameToIndex['Interface1']));
      expect(results.pivot['interfaces'], contains(
          results.nameToIndex['Interface2']));
      expect(results.getItem('Object')['interfaces'], isEmpty);
      expect(results.getItem('Interface1')['interfaces'], isEmpty);
      expect(results.getItem('Interface2')['interfaces'], isEmpty);
    });
  }

  Future getTypeHierarchy_mixins() {
    String text =
        r'''
class Base {}
class Mixin1 {}
class Mixin2 {}
class Pivot /* target */ extends Base with Mixin1, Mixin2 {}
''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results.items, hasLength(5));
      expect(results.pivot['mixins'], hasLength(2));
      expect(results.pivot['mixins'], contains(results.nameToIndex['Mixin1']));
      expect(results.pivot['mixins'], contains(results.nameToIndex['Mixin2']));
      expect(results.getItem('Object')['mixins'], isEmpty);
      expect(results.getItem('Base')['mixins'], isEmpty);
      expect(results.getItem('Mixin1')['mixins'], isEmpty);
      expect(results.getItem('Mixin2')['mixins'], isEmpty);
    });
  }

  Future getTypeHierarchy_subclasses() {
    String text =
        r'''
class Base {}
class Pivot /* target */ extends Base {}
class Sub1 extends Pivot {}
class Sub2 extends Pivot {}
class Sub2a extends Sub2 {}
''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results.items, hasLength(6));
      expect(results.pivot['subclasses'], hasLength(2));
      expect(results.pivot['subclasses'], contains(results.nameToIndex['Sub1'])
          );
      expect(results.pivot['subclasses'], contains(results.nameToIndex['Sub2'])
          );
      expect(results.getItem('Object')['subclasses'], isEmpty);
      expect(results.getItem('Base')['subclasses'], isEmpty);
      expect(results.getItem('Sub1')['subclasses'], isEmpty);
      expect(results.getItem('Sub2')['subclasses'], equals(
          [results.nameToIndex['Sub2a']]));
      expect(results.getItem('Sub2a')['subclasses'], isEmpty);
    });
  }

  Future getTypeHierarchy_badTarget() {
    String text =
        r'''
main() {
  if /* target */ (true) {
    print('Hello');
  }
}
''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results, isNull);
    });
  }

  Future getTypeHierarchy_functionTarget() {
    String text = r'''
main /* target */ () {
}
''';
    return typeHierarchyTest(text).then((HierarchyResults results) {
      expect(results, isNull);
    });
  }

  Future<HierarchyResults> typeHierarchyTest(String text) {
    int offset = text.indexOf(' /* target */') - 1;
    sendAnalysisUpdateContent({
      pathname: {
        'type': 'add',
        'content': text
      }
    });
    return analysisFinished.then((_) => sendSearchGetTypeHierarchy(pathname,
        offset)).then((result) {
      if (result.isEmpty) {
        return null;
      } else {
        return new HierarchyResults(result);
      }
    });
  }
}

main() {
  runReflectiveTests(Test);
}