import * as plugins from './smartsocket.plugins';
import * as helpers from './smartsocket.helpers';

import * as http from 'http';

// classes
import { Objectmap } from 'lik';
import { SocketFunction, ISocketFunctionCall } from './smartsocket.classes.socketfunction';
import { SocketConnection } from './smartsocket.classes.socketconnection';
import { SocketRequest } from './smartsocket.classes.socketrequest';
import { SocketRole } from './smartsocket.classes.socketrole';

// socket.io
import * as SocketIO from 'socket.io';

export interface ISmartsocketConstructorOptions {
  port: number;
}

export class Smartsocket {
  options: ISmartsocketConstructorOptions;
  httpServer: http.Server;
  io: SocketIO.Server;
  openSockets = new Objectmap<SocketConnection>();
  socketRoles = new Objectmap<SocketRole>();
  constructor(optionsArg: ISmartsocketConstructorOptions) {
    this.options = optionsArg;
  }

  /**
   * starts listening to incoming sockets:
   */
  async startServer() {
    let done = plugins.smartq.defer();
    if (!this.httpServer) {
      this.httpServer = new http.Server();
    }
    this.io = plugins.socketIo(this.httpServer);
    this.io.on('connection', socketArg => {
      this._handleSocketConnection(socketArg);
    });
    this.httpServer.listen(this.options.port, () => {
      done.resolve();
    });
    return await done.promise;
  }

  /**
   * starts the server with another server
   * also works with an express style server
   */
  async setServer(httpServerArg: http.Server) {
    this.httpServer = httpServerArg;
  }

  /**
   * closes the server
   */
  async closeServer() {
    await plugins.smartdelay.delayFor(1000);
    this.openSockets.forEach((socketObjectArg: SocketConnection) => {
      plugins.beautylog.log(`disconnect socket with >>alias ${socketObjectArg.alias}`);
      socketObjectArg.socket.disconnect();
    });
    this.openSockets.wipe();
    this.io.close();
  }

  // communication

  /**
   * allows call to specific client.
   */
  clientCall(functionNameArg: string, dataArg: any, targetSocketConnectionArg: SocketConnection) {
    let done = plugins.smartq.defer();
    let socketRequest = new SocketRequest({
      side: 'requesting',
      originSocketConnection: targetSocketConnectionArg,
      shortId: plugins.shortid.generate(),
      funcCallData: {
        funcName: functionNameArg,
        funcDataArg: dataArg
      }
    });
    socketRequest.dispatch().then((dataArg: ISocketFunctionCall) => {
      done.resolve(dataArg.funcDataArg);
    });
    return done.promise;
  }

  /**
   * adds socketRoles
   */
  addSocketRoles(socketRolesArray: SocketRole[]): void {
    for (let socketRole of socketRolesArray) {
      this.socketRoles.add(socketRole);
    }
    return;
  }

  /**
   * the standard handler for new socket connections
   */
  private _handleSocketConnection(socketArg) {
    let socketConnection: SocketConnection = new SocketConnection({
      alias: undefined,
      authenticated: false,
      role: undefined,
      side: 'server',
      smartsocketHost: this,
      socket: socketArg
    });
    plugins.beautylog.log('Socket connected. Trying to authenticate...');
    this.openSockets.add(socketConnection);
    socketConnection
      .authenticate()
      .then(() => {
        return socketConnection.listenToFunctionRequests();
      })
      .catch(err => {
        console.log(err);
      });
  }
}