import { Injectable } from '@angular/core';
import { Base64 } from '../base64/base64';
import { LoadingController } from 'ionic-angular';
import { AlertController } from 'ionic-angular';
import { ToastController } from 'ionic-angular';

@Injectable()
export class AppUtil {

  private loadingBar: any;

  constructor(public alertController: AlertController, public loading: LoadingController,
    public base64: Base64, public toastController: ToastController) {
  }

  public isNull(val) {
    return val === undefined || val === 'undefined' || val === "null" || val === null;
  }

  public isNotNull(val) {
    return !this.isNull(val);
  }

  public isBlank(val) {
    return val === undefined || val === 'undefined' || val === "null" || val === null || val === "";
  }

  public isNotBlank(val) {
    return !this.isBlank(val);
  }

  public encodeJsonTOBase64(val) {
    return "data:;base64," + this.base64.encode(JSON.stringify(val));
  }

  public decodeBase64ToJson(val) {
    return JSON.parse(this.base64.decode((val).replace(/(\r\n|\n|\r)/gm, "")));
  }

  public showLoading() {
    this.loadingBar = this.loading.create({
      content: 'Please Wait...'
    });
    this.loadingBar.present();
  }

  public hideLoading() {
    this.loadingBar.dismiss();
  }

  public alert(msg, title) {
    let promise = new Promise((resolve, reject) => {
      let temp_alert = this.alertController.create({
        title: title || 'Alert',
        subTitle: msg,
        buttons: [{
          text: 'OK',
          handler: () => {
            resolve();
          }
        }]
      });
      temp_alert.present();
    }); return promise;
  }

  public confirm(msg, title) {
    let promise = new Promise((resolve, reject) => {
      let confirm = this.alertController.create({
        title: title || 'Confirm',
        message: msg,
        buttons: [
          {
            text: 'OK',
            handler: () => resolve()
          },
          {
            text: 'CANCEL',
            handler: () => reject()
          }
        ]
      });
      confirm.present();
    });
    return promise;
  }

  public popUp(msg, title, ok, cancel) {
    let promise = new Promise((resolve, reject) => {
      let confirm = this.alertController.create({
        title: title,
        message: msg,
        buttons: [
          {
            text: ok,
            handler: () => resolve()
          },
          {
            text: cancel,
            handler: () => reject()
          }
        ]
      });
      confirm.present();
    });

    return promise;
  };


  public toast(message, time, position) {
    let toast = this.toastController.create({
      message: message,
      duration: time || 3000,
      position: position || 'bottom'
    });
    toast.present();
  }

  
  // public isDeviceOnline () {
  //      let isOnline = null;
  //     if (window.cordova) {
  //         document.addEventListener("deviceready", function() {
  //             isOnline = $cordovaNetwork.isOnline();
  //         }, false);
  //     } else {
  //         isOnline = navigator.onLine;
  //     }
  //     return isOnline;
  // }

  // public isDeviceOffline () {
  //      let isOffline = null;
  //     if (window.cordova) {
  //         document.addEventListener("deviceready", function() {
  //             isOffline = $cordovaNetwork.isOffline();
  //         }, false);
  //     } else {
  //         isOffline = !navigator.onLine;
  //     }
  //     return isOffline;
  // }

  // public getNetwork () {
  //      let networkState = null;
  //     document.addEventListener("deviceready", function() {
  //         networkState = $cordovaNetwork.getNetwork();
  //     }, false);
  //     return networkState;
  // }
}