// 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.

import 'package:analysis_server/protocol/protocol.dart';
import 'package:analysis_server/protocol/protocol_generated.dart';
import 'package:analysis_server/src/analysis_server.dart';
import 'package:analysis_server/src/analytics/analytics_manager.dart';
import 'package:analysis_server/src/channel/channel.dart';
import 'package:analysis_server/src/legacy_analysis_server.dart';
import 'package:analysis_server/src/server/crash_reporting_attachments.dart';
import 'package:analysis_server/src/server/detachable_filesystem_manager.dart';
import 'package:analysis_server/src/server/diagnostic_server.dart';
import 'package:analysis_server/src/utilities/request_statistics.dart';
import 'package:analyzer/file_system/physical_file_system.dart';
import 'package:analyzer/instrumentation/instrumentation.dart';
import 'package:analyzer/src/generated/sdk.dart';

abstract class AbstractSocketServer {
  AnalysisServer? get analysisServer;

  AnalysisServerOptions get analysisServerOptions;

  DiagnosticServer? get diagnosticServer;
}

/// Instances of the class [SocketServer] implement the common parts of
/// http-based and stdio-based analysis servers.  The primary responsibility of
/// the SocketServer is to manage the lifetime of the AnalysisServer and to
/// encode and decode the JSON messages exchanged with the client.
class SocketServer implements AbstractSocketServer {
  @override
  final AnalysisServerOptions analysisServerOptions;

  /// The function used to create a new SDK using the default SDK.
  final DartSdkManager sdkManager;

  final CrashReportingAttachmentsBuilder crashReportingAttachmentsBuilder;

  final InstrumentationService instrumentationService;

  final RequestStatisticsHelper? requestStatistics;

  @override
  final DiagnosticServer? diagnosticServer;

  /// The object through which analytics are to be sent.
  final AnalyticsManager analyticsManager;

  /// An optional manager to handle file systems which may not always be
  /// available.
  final DetachableFileSystemManager? detachableFileSystemManager;

  /// The analysis server that was created when a client established a
  /// connection, or `null` if no such connection has yet been established.
  @override
  LegacyAnalysisServer? analysisServer;

  SocketServer(
    this.analysisServerOptions,
    this.sdkManager,
    this.crashReportingAttachmentsBuilder,
    this.instrumentationService,
    this.requestStatistics,
    this.diagnosticServer,
    this.analyticsManager,
    this.detachableFileSystemManager,
  );

  /// Create an analysis server which will communicate with the client using the
  /// given serverChannel.
  void createAnalysisServer(ServerCommunicationChannel serverChannel) {
    if (analysisServer != null) {
      var error = RequestError(
        RequestErrorCode.SERVER_ALREADY_STARTED,
        'Server already started',
      );
      serverChannel.sendResponse(Response('', error: error));
      serverChannel.requests.listen((RequestOrResponse requestOrResponse) {
        serverChannel.sendResponse(
          Response(requestOrResponse.id, error: error),
        );
      });
      return;
    }

    var resourceProvider = PhysicalResourceProvider(
      stateLocation: analysisServerOptions.cacheFolder,
    );

    var server =
        analysisServer = LegacyAnalysisServer(
          serverChannel,
          resourceProvider,
          analysisServerOptions,
          sdkManager,
          analyticsManager,
          crashReportingAttachmentsBuilder,
          instrumentationService,
          requestStatistics: requestStatistics,
          diagnosticServer: diagnosticServer,
          detachableFileSystemManager: detachableFileSystemManager,
          enableBlazeWatcher: true,
        );
    detachableFileSystemManager?.setAnalysisServer(server);
  }
}