// 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.

import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/file_system/memory_file_system.dart';
import 'package:analyzer/source/file_source.dart';
import 'package:analyzer/source/source.dart';
import 'package:analyzer/src/generated/source.dart'
    show SourceFactory, UriResolver;
import 'package:analyzer/src/source/package_map_resolver.dart';
import 'package:analyzer_testing/resource_provider_mixin.dart';
import 'package:path/path.dart' as pathos;
import 'package:test/test.dart';
import 'package:test_reflective_loader/test_reflective_loader.dart';

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

class AbsoluteUriResolver extends UriResolver {
  final ResourceProvider resourceProvider;

  AbsoluteUriResolver(this.resourceProvider);

  @override
  Uri? pathToUri(String path) {
    throw UnimplementedError();
  }

  @override
  Source resolveAbsolute(Uri uri) {
    return FileSource(
      resourceProvider.getFile(resourceProvider.pathContext.fromUri(uri)),
      uri,
    );
  }
}

@reflectiveTest
class SourceFactoryTest with ResourceProviderMixin {
  void test_creation() {
    expect(SourceFactory([]), isNotNull);
  }

  void test_pathToUri() {
    File file1 = getFile("/some/file1.dart");
    File file2 = getFile("/some/file2.dart");
    Uri expected1 = Uri.parse("file:///my_file.dart");
    SourceFactory factory = SourceFactory([
      UriResolver_restoreUri(file1.path, expected1),
    ]);
    expect(factory.pathToUri(file1.path), expected1);
    expect(factory.pathToUri(file2.path), isNull);
  }

  void test_resolveUri_absolute() {
    UriResolver_absolute resolver = UriResolver_absolute();
    SourceFactory factory = SourceFactory([resolver]);
    factory.resolveUri(null, "dart:core");
    expect(resolver.invoked, isTrue);
  }

  void test_resolveUri_nonAbsolute_absolute() {
    SourceFactory factory = SourceFactory([
      AbsoluteUriResolver(resourceProvider),
    ]);
    String sourcePath = convertPath('/does/not/exist.dart');
    String targetRawPath = '/does/not/matter.dart';
    String targetPath = convertPath(targetRawPath);
    String targetUri = toUri(targetRawPath).toString();
    Source sourceSource = FileSource(getFile(sourcePath));
    var result = factory.resolveUri(sourceSource, targetUri)!;
    expect(result.fullName, targetPath);
  }

  void test_resolveUri_nonAbsolute_relative() {
    SourceFactory factory = SourceFactory([
      AbsoluteUriResolver(resourceProvider),
    ]);
    Source containingSource = FileSource(getFile('/does/not/have.dart'));
    var result = factory.resolveUri(containingSource, 'exist.dart')!;
    expect(result.fullName, convertPath('/does/not/exist.dart'));
  }

  void test_resolveUri_nonAbsolute_relative_package() {
    MemoryResourceProvider provider = MemoryResourceProvider();
    pathos.Context context = provider.pathContext;
    String packagePath = context.joinAll([
      context.separator,
      'path',
      'to',
      'package',
    ]);
    String libPath = context.joinAll([packagePath, 'lib']);
    String dirPath = context.joinAll([libPath, 'dir']);
    String firstPath = context.joinAll([dirPath, 'first.dart']);
    String secondPath = context.joinAll([dirPath, 'second.dart']);

    provider.newFolder(packagePath);
    Folder libFolder = provider.newFolder(libPath);
    provider.newFolder(dirPath);
    File firstFile = provider.newFile(firstPath, '');
    provider.newFile(secondPath, '');

    PackageMapUriResolver resolver = PackageMapUriResolver(provider, {
      'package': [libFolder],
    });
    SourceFactory factory = SourceFactory([resolver]);
    var uri = Uri.parse('package:package/dir/first.dart');
    var librarySource = FileSource(firstFile, uri);

    var result = factory.resolveUri(librarySource, 'second.dart')!;
    expect(result, isNotNull);
    expect(result.fullName, secondPath);
    expect(result.uri.toString(), 'package:package/dir/second.dart');
  }
}

class UriResolver_absolute extends UriResolver {
  bool invoked = false;

  UriResolver_absolute();

  @override
  Uri? pathToUri(String path) {
    throw UnimplementedError();
  }

  @override
  Source? resolveAbsolute(Uri uri) {
    invoked = true;
    return null;
  }
}

class UriResolver_restoreUri extends UriResolver {
  String path1;
  Uri expected1;
  UriResolver_restoreUri(this.path1, this.expected1);

  @override
  Uri? pathToUri(String path) {
    if (path == path1) {
      return expected1;
    }
    return null;
  }

  @override
  Source? resolveAbsolute(Uri uri) => null;
}