import * as plugins from './smartuniverse.plugins';

import { Handler, Route, Server } from '@pushrocks/smartexpress';
import { UniverseCache, UniverseChannel, UniverseMessage } from './';

import * as paths from './smartuniverse.paths';

import * as interfaces from './interfaces';
import { UniverseConnectionManager } from './smartuniverse.classes.universeconnectionmanager';
import { UniverseConnection } from './smartuniverse.classes.universeconnection';

export interface ISmartUniverseConstructorOptions {
  messageExpiryInMilliseconds: number;
}

/**
 * main class that setsup a Universe
 */
export class Universe {
  // subinstances
  public universeCache: UniverseCache;
  public universeConnectionManager: UniverseConnectionManager;

  // options
  private options: ISmartUniverseConstructorOptions;

  /**
   * the smartexpress server used
   */
  private smartexpressServer: plugins.smartexpress.Server;

  /**
   * the smartsocket used
   */
  private smartsocket: plugins.smartsocket.Smartsocket;

  constructor(optionsArg: ISmartUniverseConstructorOptions) {
    this.options = optionsArg;
    this.universeCache = new UniverseCache(this.options.messageExpiryInMilliseconds);
    this.universeConnectionManager = new UniverseConnectionManager();
  }

  /**
   * stores the version of the universe server running
   * this is done since the version is exposed through the api and multiple fs actions are avoided this way.
   */
  private universeVersionStore: string;

  /**
   * get the currently running version of smartuniverse
   */
  public getUniverseVersion() {
    if (this.universeVersionStore) {
      return this.universeVersionStore;
    } else {
      const packageJson = plugins.smartfile.fs.toObjectSync(paths.packageJson);
      this.universeVersionStore = packageJson.version;
      return this.universeVersionStore;
    }
  }

  /**
   * adds a channel to the Universe
   */
  public async addChannel(nameArg: string, passphraseArg: string) {
    const newChannel = UniverseChannel.createChannel(this.universeCache, nameArg, passphraseArg);
  }

  /**
   * initiates a server
   */
  public async start(portArg: number) {
    // lets create the base smartexpress server
    this.smartexpressServer = new plugins.smartexpress.Server({
      cors: true,
      defaultAnswer: async () => {
        return `smartuniverse server ${this.getUniverseVersion()}`;
      },
      forceSsl: false,
      port: portArg
    });

    // add websocket upgrade
    this.smartsocket = new plugins.smartsocket.Smartsocket({});

    // add a role for the clients
    const ClientRole = new plugins.smartsocket.SocketRole({
      name: 'UniverseClient',
      passwordHash: plugins.smarthash.sha256FromStringSync('UniverseClient') // authentication happens on another level
    });

    // add the role to smartsocket
    this.smartsocket.addSocketRoles([ClientRole]);

    const SubscriptionSocketFunction = new plugins.smartsocket.SocketFunction({
      allowedRoles: [ClientRole],
      funcName: 'channelSubscription',
      funcDef: (data) => {
        (() => {
          // TODO:
          this.universeConnectionManager.addConnection();
        })();
      }
    });

    // add smartsocket to the running smartexpress app
    this.smartsocket.setExternalServer('smartexpress', this.smartexpressServer as any);
    // start everything
    await this.smartexpressServer.start();
    await this.smartsocket.start();
    console.log('started universe');
    
  }

  /**
   * stop everything
   */
  public async stopServer() {
    await this.smartsocket.stop();
    await this.smartexpressServer.stop();
  }
}