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

const publicRoleName = 'publicRoleName';
const publicRolePass = 'publicRolePass';

export type TTypedSocketSide = 'server' | 'client';

export class TypedSocket {
  // STATIC
  /**
   * creates a typedsocket server
   * note: this will fail in browser environments as server libs are not bundled.
   */
  public static async createServer(
    typedrouterArg: plugins.typedrequest.TypedRouter,
    smartexpressServerArg?: any
  ): Promise<TypedSocket> {
    const smartsocketServer = new plugins.smartsocket.Smartsocket({
      port: 3000,
    });
    if (smartexpressServerArg) {
      smartsocketServer.setExternalServer('smartexpress', smartexpressServerArg);
    }
    const publicRole = new plugins.smartsocket.SocketRole({
      name: publicRoleName,
      passwordHash: await plugins.isohash.sha256FromString(publicRolePass),
    });
    smartsocketServer.addSocketRoles([publicRole]);
    smartsocketServer.socketFunctions.add(
      new plugins.smartsocket.SocketFunction({
        funcName: 'processMessage',
        allowedRoles: [publicRole],
        funcDef: async (dataArg, socketConnectionArg) => {
          return typedrouterArg.routeAndAddResponse(dataArg);
        },
      })
    );
    const typedsocket = new TypedSocket(
      'server',
      typedrouterArg,
      async <T extends plugins.typedrequestInterfaces.ITypedRequest>(
        dataArg: T,
        targetConnectionArg?: plugins.smartsocket.SocketConnection
      ): Promise<T> => {
        if (!targetConnectionArg) {
          if ((smartsocketServer.socketConnections.getArray().length = 1)) {
            console.log(
              'Since no targetConnection was supplied and there is only one active one present, choosing that one automatically'
            );
            targetConnectionArg = smartsocketServer.socketConnections.getArray()[0];
          } else {
            throw new Error('you need to specify the wanted targetConnection');
          }
        }
        const response: T = await smartsocketServer.clientCall(
          'processMessage',
          dataArg,
          targetConnectionArg
        ) as any;
        return response;
      },
      smartsocketServer
    );
    await smartsocketServer.start();

    return typedsocket;
  }

  public static async createClient(
    typedrouterArg: plugins.typedrequest.TypedRouter,
    serverUrlArg: string,
    aliasArg = 'clientArg'
  ): Promise<TypedSocket> {
    const domain = new plugins.smartstring.Domain(serverUrlArg);

    const socketOptions = {
      alias: aliasArg,
      role: publicRoleName,
      password: publicRolePass,
      port: domain.port || 3000,
      url: `${domain.nodeParsedUrl.protocol}//${domain.nodeParsedUrl.hostname}`,
      autoReconnect: true,
    }
    console.log(`starting typedsocket with the following settings:`)
    console.log(socketOptions);
    const smartsocketClient = new plugins.smartsocket.SmartsocketClient(socketOptions);
    smartsocketClient.addSocketFunction(
      new plugins.smartsocket.SocketFunction({
        funcName: 'processMessage',
        allowedRoles: [],
        funcDef: async (dataArg, socketConnectionArg) => {
          return typedrouterArg.routeAndAddResponse(dataArg);
        },
      })
    );
    const typedsocket = new TypedSocket(
      'client',
      typedrouterArg,
      async <T extends plugins.typedrequestInterfaces.ITypedRequest>(dataArg: T): Promise<T> => {
        const response: T = (smartsocketClient.serverCall('processMessage', dataArg) as any) as T;
        return response;
      },
      smartsocketClient
    );

    await smartsocketClient.connect();

    return typedsocket;
  }

  // INSTANCE
  public side: TTypedSocketSide;
  public typedrouter: plugins.typedrequest.TypedRouter;
  private postMethod: plugins.typedrequest.IPostMethod &
    ((
      typedRequestPostObject: plugins.typedrequestInterfaces.ITypedRequest,
      socketConnectionArg?: plugins.smartsocket.SocketConnection
    ) => Promise<plugins.typedrequestInterfaces.ITypedRequest>);
  private socketServerOrClient: plugins.smartsocket.Smartsocket | plugins.smartsocket.SmartsocketClient;
  constructor(
    sideArg: TTypedSocketSide,
    typedrouterArg: plugins.typedrequest.TypedRouter,
    postMethodArg: plugins.typedrequest.IPostMethod,
    socketServerOrClientArg: plugins.smartsocket.Smartsocket | plugins.smartsocket.SmartsocketClient
  ) {
    this.side = sideArg;
    this.typedrouter = typedrouterArg;
    this.postMethod = postMethodArg;
    this.socketServerOrClient = socketServerOrClientArg;
  }

  public addTag(keyArg: string, payloadArg: any) {
    if (this.side === 'client' && this.socketServerOrClient instanceof plugins.smartsocket.SmartsocketClient) {
      this.socketServerOrClient.socketConnection.addTag({
        id: keyArg,
        payload: payloadArg
      })
    } else {
      throw new Error('tagging is only supported on clients');
    }
  }

  public createTypedRequest<T extends plugins.typedrequestInterfaces.ITypedRequest>(
    methodName: T['method'],
    targetConnection?: plugins.smartsocket.SocketConnection
  ): plugins.typedrequest.TypedRequest<T> {
    const typedrequest = new plugins.typedrequest.TypedRequest<T>(
      new plugins.typedrequest.TypedTarget({
        postMethod: async (requestDataArg) => {
          const result = await this.postMethod(requestDataArg, targetConnection);
          return result;
        },
      }),
      methodName
    );
    return typedrequest;
  }

  /**
   * returns all matching target connection
   * @param asyncFindFuncArg
   * @returns 
   */
  public async findAllTargetConnections(
    asyncFindFuncArg: (connectionArg: plugins.smartsocket.SocketConnection) => Promise<boolean>
  ) {
    if (this.socketServerOrClient instanceof plugins.smartsocket.Smartsocket) {
      const matchingSockets: plugins.smartsocket.SocketConnection[] = [];
      for (const socketConnection of this.socketServerOrClient.socketConnections.getArray()) {
        if (await asyncFindFuncArg(socketConnection)) {
          matchingSockets.push(socketConnection);
        }
      }
      return matchingSockets;
    } else {
      throw new Error('this method >>findTargetConnection<< is only available from the server');
    }
  }

  /**
   * returns a single target connection by returning the first one of all matching ones
   * @param asyncFindFuncArg
   * @returns 
   */
  public async findTargetConnection(
    asyncFindFuncArg: (connectionArg: plugins.smartsocket.SocketConnection) => Promise<boolean>
  ) {
    const allMatching = await this.findAllTargetConnections(asyncFindFuncArg);
    return allMatching[0];
  }

  public async findAllTargetConnectionsByTag(keyArg: string, payloadArg?: any) {
    return this.findAllTargetConnections(async socketConnectionArg => {
      let result: boolean;
      if (!payloadArg) {
        result = !!socketConnectionArg.getTagById(keyArg);
      } else {
        result = !!socketConnectionArg.getTagById(keyArg) === payloadArg;
      }
      return result;
    })
  }

  public async findTargetConnectionByTag(keyArg: string, payloadArg?: any) {
    const allResults = await this.findAllTargetConnectionsByTag(keyArg, payloadArg)
    return allResults[0];
  }

  public async stop() {
    await this.socketServerOrClient.stop()
  }
}