import {Injectable} from '@angular/core';
import * as ActionCable from 'actioncable';
import {Broadcaster} from './broadcaster';
import {isNullOrUndefined, isUndefined} from 'util';

@Injectable()
export class NgXCable {
  constructor(
    private broadcaster: Broadcaster
  ) {
  };

  public setCable = function (url: string): void {
    this.cable = ActionCable.createConsumer(url);
  };

  public connect = function (url: string) {
    this.setCable(url);
  };

  public isOpen = function () {
    if (!isUndefined(this.cable)) {
      return !this.cable.connection.disconnected;
    } else {
      return false;
    }
  };

  public create = function (params: { channel: string, room: string }) {
    let _this = this;

    return this.cable.subscriptions.create(params, {
      received: function (data: any) {
        _this.broadcaster.broadcast(params.channel, data);
      }
    });
  };

  public subscribe = function (params: { channel: string, room: string }) {
    return this.create(params);
  };

  public send = function (data: any, subscriptions?: ActionCable.Subscription[]) {
    if (!this.isOpen()) {
      return false;
    }

    if (isNullOrUndefined(subscriptions)) {
      this.cable.subscriptions.subscriptions[0].send(data);
    } else if (subscriptions instanceof Array) {
      subscriptions.forEach(
        function (subscription) {
          if (subscription instanceof ActionCable.Subscription) {
            subscription.send(data);
          }
        }
      );
    } else {
      return false;
    }

    return true;
  };

  public perform = function (action: string, data: any, subscriptions?: ActionCable.Subscription[]) {
    if (!this.isOpen()) {
      return false;
    }

    if (isNullOrUndefined(subscriptions)) {
      this.cable.subscriptions.subscriptions[0].perform(action, data);
    } else if (subscriptions instanceof Array) {
      subscriptions.forEach(
        function (subscription) {
          if (subscription instanceof ActionCable.Subscription) {
            subscription.perform(action, data);
          }
        }
      );
    } else {
      return false;
    }

    return true;
  };

  public unsubscribe = function (subscriptions?: ActionCable.Subscription[]) {
    let _this = this;

    if (isNullOrUndefined(subscriptions)) {
      this.cable.subscriptions.subscriptions.forEach(
        function (subscription) {
          _this.cable.subscriptions.remove(subscription);
        }
      );
    } else if (subscriptions instanceof Array) {
      subscriptions.forEach(
        function (subscription) {
          if (subscription instanceof ActionCable.Subscription) {
            _this.cable.subscriptions.remove(subscription);
          }
        }
      );
    } else {
      return false;
    }

    return true;
  };

  public getSubscriptions = function () {
    return this.cable.subscriptions.subscriptions;
  };

  public getCountSubscriptions = function () {
    return this.getSubscriptions().length;
  };

  public searchSubcriptions = function (id, field = 'room') {
    let rsub = [];

    this.getSubscriptions().forEach(
      function (subscription) {
        const msg = JSON.parse(subscription.identifier);

        if (id === msg[field]) {
          rsub.push(subscription);
        }
      }
    );

    return rsub;
  };

  public reject = function (subscription: ActionCable.Subscription) {
    if (subscription instanceof ActionCable.Subscription) {
      this.cable.subscriptions.remove(subscription);
    } else {
      return false;
    }

    return true;
  };

  public disconnect = function () {
    if (this.isOpen()) {
      this.cable.disconnect();
    } else {
      return false;
    }
  };
}