// 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 'dart:async';

import 'package:analyzer/dart/analysis/analysis_context.dart';
import 'package:analyzer/dart/analysis/results.dart';
import 'package:analyzer/diagnostic/diagnostic.dart';
import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/source/line_info.dart';
import 'package:analyzer/src/dart/analysis/driver.dart';
import 'package:analyzer_plugin/channel/channel.dart';
import 'package:analyzer_plugin/plugin/plugin.dart';
import 'package:analyzer_plugin/protocol/protocol.dart';
import 'package:analyzer_plugin/src/protocol/protocol_internal.dart';
import 'package:test/test.dart';

class MockAnalysisDriver implements AnalysisDriver {
  @override
  final Set<String> addedFiles = {};

  @override
  set priorityFiles(List<String> priorityPaths) {}

  @override
  void addFile(String path) {
    addedFiles.add(path);
  }

  @override
  dynamic noSuchMethod(Invocation invocation) {
    return super.noSuchMethod(invocation);
  }
}

class MockChannel implements PluginCommunicationChannel {
  bool _closed = false;

  void Function()? _onDone;
  Function? _onError;
  void Function(Notification)? _onNotification;
  void Function(Request)? _onRequest;

  List<Notification> sentNotifications = <Notification>[];

  int idCounter = 0;

  Map<String, Completer<Response>> completers = <String, Completer<Response>>{};

  @override
  void close() {
    _closed = true;
  }

  @override
  void listen(
    void Function(Request request)? onRequest, {
    void Function()? onDone,
    Function? onError,
    Function(Notification)? onNotification,
  }) {
    _onDone = onDone;
    _onError = onError;
    _onNotification = onNotification;
    _onRequest = onRequest;
  }

  void sendDone() {
    if (_onDone != null) {
      _onDone!();
    }
  }

  void sendError(Object exception, StackTrace stackTrace) {
    if (_onError != null) {
      _onError!(exception, stackTrace);
    }
  }

  @override
  void sendNotification(Notification notification) {
    if (_closed) {
      throw StateError('Sent a notification to a closed channel');
    }
    if (_onNotification == null) {
      fail('Unexpected invocation of sendNotification');
    }
    _onNotification!(notification);
  }

  Future<Response> sendRequest(RequestParams params) {
    if (_onRequest == null) {
      fail('Unexpected invocation of sendNotification');
    }
    var id = (idCounter++).toString();
    var request = params.toRequest(id);
    var completer = Completer<Response>();
    completers[request.id] = completer;
    _onRequest!(request);
    return completer.future;
  }

  @override
  void sendResponse(Response response) {
    if (_closed) {
      throw StateError('Sent a response to a closed channel');
    }
    var completer = completers.remove(response.id);
    completer?.complete(response);
  }
}

class MockResolvedUnitResult implements ResolvedUnitResult {
  @override
  final List<Diagnostic> diagnostics;

  @override
  final LineInfo lineInfo;

  @override
  final String path;

  MockResolvedUnitResult({
    List<Diagnostic>? errors,
    LineInfo? lineInfo,
    String? path,
  }) : diagnostics = errors ?? [],
       lineInfo = lineInfo ?? LineInfo([0]),
       path = path ?? '';

  @override
  dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
}

class MockResourceProvider implements ResourceProvider {
  @override
  dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
}

/// A concrete implementation of a server plugin that is suitable for testing.
class MockServerPlugin extends ServerPlugin {
  MockServerPlugin(ResourceProvider resourceProvider)
    : super(resourceProvider: resourceProvider);

  @override
  List<String> get fileGlobsToAnalyze => <String>['*.dart'];

  @override
  String get name => 'Test Plugin';

  @override
  String get version => '0.1.0';

  @override
  Future<void> analyzeFile({
    required AnalysisContext analysisContext,
    required String path,
  }) async {}
}