// 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.

import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/src/generated/sdk.dart';
import 'package:analyzer/src/generated/source.dart';
import 'package:analyzer/src/summary/package_bundle_reader.dart';

/**
 * Abstract superclass of classes that provide information about the workspace
 * in which analysis is being performed.
 */
abstract class Workspace {
  /**
   * Return `true` if this workspace defines a single "project" and that
   * "project" depends upon flutter.
   */
  bool get hasFlutterDependency => packageMap?.containsKey('flutter') ?? false;

  /**
   * Return a (possibly null) map of package sources.
   */
  Map<String, List<Folder>> get packageMap;

  /**
   * The [UriResolver] that can resolve `package` URIs.
   */
  UriResolver get packageUriResolver;

  /**
   * The absolute workspace root path.
   */
  String get root;

  /**
   * Create the source factory that should be used to resolve Uris to [Source]s.
   * The [sdk] may be `null`. The [summaryData] can also be `null`.
   */
  SourceFactory createSourceFactory(DartSdk sdk, SummaryDataStore summaryData);

  /**
   * Find the [WorkspacePackage] where the library at [path] is defined.
   *
   * Separate from [Packages] or [packageMap], this method is designed to find
   * the package, by its root, in which a library at an arbitrary path is
   * defined.
   */
  WorkspacePackage findPackageFor(String path);
}

/**
 * Abstract superclass of classes that provide information about a package
 * defined in a Workspace.
 *
 * Separate from [Packages] or package maps, this class is designed to simply
 * understand whether arbitrary file paths represent libraries declared within
 * a given package in a Workspace.
 */
abstract class WorkspacePackage {
  String get root;

  Workspace get workspace;

  bool contains(Source source);

  /// Return a file path for the location of [source].
  ///
  /// If [source]'s URI scheme is package, it's fullName might be unusable (for
  /// example, the case of a [InSummarySource]). In this case, use
  /// [workspace]'s package URI resolver to fetch the file path.
  String filePathFromSource(Source source) {
    if (source.uri.scheme == 'package') {
      return workspace.packageUriResolver.resolveAbsolute(source.uri)?.fullName;
    } else {
      return source.fullName;
    }
  }
}