// Copyright (c) 2013, 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.

part of vmservice_io;

class Server {
  int port;
  static ContentType jsonContentType = ContentType.parse('application/json');
  final VmService service;
  HttpServer _server;

  Server(this.service, this.port);

  void _sendResponse(HttpRequest request, String response) {
    request.response..headers.contentType = jsonContentType
                    ..write(response)
                    ..close();
  }

  void _requestHandler(HttpRequest request) {
    // Allow cross origin requests.
    request.response.headers.add('Access-Control-Allow-Origin', '*');

    final String path =
          request.uri.path == '/' ? '/index.html' : request.uri.path;

    var resource = Resource.resources[path];
    if (resource != null) {
      // Serving up a static resource (e.g. .css, .html, .png).
      request.response.headers.contentType =
          ContentType.parse(resource.mimeType);
      request.response.add(resource.data);
      request.response.close();
      return;
    }

    var serviceRequest = new ServiceRequest();
    var r = serviceRequest.parse(request.uri);
    if (r) {
      var f = service.runningIsolates.route(serviceRequest);
      assert(f != null);
      f.then((_) {
        _sendResponse(request, serviceRequest.response);
      }).catchError((e) {
        // Error replying over HTTP.
      });
      return;
    }
    _sendResponse(request, serviceRequest.response);
  }

  Future startServer() {
    return HttpServer.bind(InternetAddress.LOOPBACK_IP_V4, port).then((s) {
      // Only display message when port is automatically selected.
      var display_message = (port == 0);
      // Retrieve port.
      port = s.port;
      _server = s;
      _server.listen(_requestHandler);
      if (display_message) {
        print('VmService listening on port $port');
      }
      return s;
    });
  }
}