import { Component } from "@angular/core";
import {
  NavController,
  ToastController,
  LoadingController,
  AlertController
} from "ionic-angular";
import { Storage } from "@ionic/storage";
import { CryptoProvider } from "../../providers/crypto/crypto";
import { SocialSharing } from "@ionic-native/social-sharing";
import * as openpgp from 'openpgp';

@Component({
  selector: "page-settings",
  templateUrl: "settings.html"
})
export class SettingsPage {
  keywords: string;
  privateKey: string;
  publicKey: string;
  email: string;
  hkp = new openpgp.HKP('https://sks-keyservers.net/');

  constructor(
    public navCtrl: NavController,
    public toastCtrl: ToastController,
    private cryptoUtils: CryptoProvider,
    private storage: Storage,
    private loadingCtrl: LoadingController,
    private sharing: SocialSharing,
    private alertCtrl: AlertController
  ) {
    this.loadValuesFromStorage();
  }

  async loadValuesFromStorage() {
    this.privateKey = await this.storage.get("privateKey");
    this.publicKey = await this.storage.get("publicKey");
    this.keywords = await this.storage.get("keywords");
    this.email = await this.storage.get("email");
  }

  generateKeys() {
    if (!this.email){
          console.log("email is not provided or not valid");
          return;
    }
    else{
      this.storage.set("email", this.email);
      if (this.publicKey || this.privateKey) {
        const alert = this.alertCtrl.create({
          title: "Are you sure?",
          subTitle:
            "You already have keys entered. Do you want to overwrite them?",
          buttons: [
            {
              text: "No",
              role: "cancel"
            },
            {
              text: "Yes",
              handler: () => {
                this.startKeyGeneration();
              }
            }
          ]
        });

        alert.present();
      } else {
        this.startKeyGeneration();
      }
    }
  }

  private async startKeyGeneration() {
    const keys = await this.cryptoUtils.generatePgpKeys(this.email);
    
    this.privateKey = keys.privateKeyArmored;
    this.publicKey = keys.publicKeyArmored;
    console.log("public key", this.privateKey);
    console.log("public key", this.publicKey);
    // this.privateKey = await this.cryptoUtils.extractPrivateKey(keys);
  }

  save() {
    this.storage.set("publicKey", this.publicKey);
    this.storage.set("privateKey", this.privateKey);
    this.storage.set("keywords", this.keywords ? this.keywords.trim() : "");

    this.showToast("Successfully saved!");
  }

  async publishPublicKey() {    
    await this.publishPublicKey2();
    await this.lookupKeys(this.email);
  }
  
  async publishPublicKey2() {      
    const loading = this.loadingCtrl.create();
      loading.present();
      // console.log("Uploding publish public key", this.publicKey);
      if(!this.publicKey) return;
      this.hkp.upload(this.publicKey).then(function() {
        console.log("Uploding public key");
      });
      loading.dismiss();
      this.showToast("Public key has been published!");
      //lookup key to verify it has been pubblished
      // await this.lookupKeys(this.email);
  }

  public async lookupKeys(email:string){

    var options = {
        query: email
    };

    let armoredPubkey = await this.hkp.lookup(options);
    let pubkey = await openpgp.key.readArmored(armoredPubkey);

     console.log('Found public key:',pubkey);
     // if(! (email == 'rohit.hosn@gmail.com'))
     //   this.pk.push(pubkey.publicKeyArmored);
     // return pubkey;
  }

  exportPrivateKey() {
    if (this.privateKey.length) {
      this.sharing
        .share(this.privateKey, null, null, null)
        .then(() => console.log("Private key was exported"))
        .catch(() =>
          this.showToast(
            "Sorry! Something went wrong trying to export the private key :("
          )
        );
    } else {
      this.showToast("There is nothing to share.");
    }
  }

  private showToast(message: string) {
    const toast = this.toastCtrl.create({
      message: message,
      position: "bottom",
      duration: 3000
    });
    toast.present();
  }
}