import { Component } from '@angular/core';
import { Events, ModalController, NavController, NavParams } from 'ionic-angular';
import * as _ from 'lodash';
import { Logger } from '../../../../providers/logger/logger';

// providers
import { CoinbaseProvider } from '../../../../providers/coinbase/coinbase';
import { ExternalLinkProvider } from '../../../../providers/external-link/external-link';
import { OnGoingProcessProvider } from '../../../../providers/on-going-process/on-going-process';
import { PopupProvider } from '../../../../providers/popup/popup';
import { ProfileProvider } from '../../../../providers/profile/profile';
import { TxFormatProvider } from '../../../../providers/tx-format/tx-format';
import { WalletProvider } from '../../../../providers/wallet/wallet';

// pages
import { FinishModalPage } from '../../../finish/finish';
import { CoinbasePage } from '../coinbase';

@Component({
  selector: 'page-buy-coinbase',
  templateUrl: 'buy-coinbase.html',
})
export class BuyCoinbasePage {

  private amount: string;
  private currency: string;
  private coin: string;
  private wallets: any;

  public paymentMethods: any[];
  public selectedPaymentMethodId: any;
  public buyPrice: string;
  public buyRequestInfo: any;
  public amountUnitStr: string;
  public accessToken: string;
  public accountId: string;
  public wallet: any;
  public network: string;
  public isFiat: boolean;

  constructor(
    private coinbaseProvider: CoinbaseProvider,
    private logger: Logger,
    private popupProvider: PopupProvider,
    private navCtrl: NavController,
    private events: Events,
    private externalLinkProvider: ExternalLinkProvider,
    private onGoingProcessProvider: OnGoingProcessProvider,
    private navParams: NavParams,
    private walletProvider: WalletProvider,
    private txFormatProvider: TxFormatProvider,
    private profileProvider: ProfileProvider,
    private modalCtrl: ModalController
  ) {
    this.coin = 'btc';
    this.isFiat = this.navParams.data.currency != 'BTC' ? true : false;
    this.amount = this.navParams.data.amount;
    this.currency = this.navParams.data.currency;
    this.network = this.coinbaseProvider.getNetwork();
  }

  ionViewDidLoad() {
    this.logger.info('ionViewDidLoad BuyCoinbasePage');
  }

  ionViewWillEnter() {
    this.wallets = this.profileProvider.getWallets({
      onlyComplete: true,
      network: this.network,
      coin: this.coin
    });

    if (_.isEmpty(this.wallets)) {
      this.showErrorAndBack('No wallets available');
      return;
    }
    this.onWalletSelect(this.wallets[0]); // Default first wallet
  }

  private showErrorAndBack(err: any): void {
    this.logger.error(err);
    err = err.errors ? err.errors[0].message : err;
    this.popupProvider.ionicAlert('Error', err).then(() => {
      this.navCtrl.pop();
    });
  }

  private showError(err: any): void {
    this.logger.error(err);
    err = err.errors ? err.errors[0].message : err;
    this.popupProvider.ionicAlert('Error', err);
  }

  private processPaymentInfo(): void {
    this.onGoingProcessProvider.set('connectingCoinbase');
    this.coinbaseProvider.init((err: any, res: any) => {
      if (err) {
        this.onGoingProcessProvider.clear();
        this.showErrorAndBack(err);
        return;
      }
      let accessToken = res.accessToken;

      this.coinbaseProvider.buyPrice(accessToken, this.coinbaseProvider.getAvailableCurrency(), (err: any, b: any) => {
        this.buyPrice = b.data || null;
      });

      this.paymentMethods = [];
      this.selectedPaymentMethodId = null;
      this.coinbaseProvider.getPaymentMethods(accessToken, (err: any, p: any) => {
        if (err) {
          this.onGoingProcessProvider.clear();
          this.showErrorAndBack(err);
          return;
        }

        let hasPrimary;
        let pm;
        for (let i = 0; i < p.data.length; i++) {
          pm = p.data[i];
          if (pm.allow_buy) {
            this.paymentMethods.push(pm);
          }
          if (pm.allow_buy && pm.primary_buy) {
            hasPrimary = true;
            this.selectedPaymentMethodId = pm.id;
          }
        }
        if (_.isEmpty(this.paymentMethods)) {
          this.onGoingProcessProvider.clear();
          let url = 'https://support.coinbase.com/customer/portal/articles/1148716-payment-methods-for-us-customers';
          let msg = 'No payment method available to buy';
          let okText = 'More info';
          let cancelText = 'Go Back';
          this.popupProvider.ionicConfirm(null, msg, okText, cancelText).then((res) => {
            if (res) this.externalLinkProvider.open(url);
            this.navCtrl.remove(3, 1);
            this.navCtrl.pop();
          });
          return;
        }
        if (!hasPrimary) this.selectedPaymentMethodId = this.paymentMethods[0].id;
        this.buyRequest();
      });
    });
  }

  public buyRequest(): void {
    this.coinbaseProvider.init((err, res) => {
      if (err) {
        this.onGoingProcessProvider.clear();
        this.showErrorAndBack(err);
        return;
      }
      let accessToken = res.accessToken;
      let accountId = res.accountId;
      let dataSrc = {
        amount: this.amount,
        currency: this.currency,
        payment_method: this.selectedPaymentMethodId,
        quote: true
      };
      this.coinbaseProvider.buyRequest(accessToken, accountId, dataSrc, (err: any, data: any) => {
        this.onGoingProcessProvider.clear();
        if (err) {
          this.showErrorAndBack(err);
          return;
        }
        this.buyRequestInfo = data.data;
      });
    });
  }

  public buyConfirm() {
    let message = 'Buy bitcoin for ' + this.amountUnitStr;
    let okText = 'Confirm';
    let cancelText = 'Cancel';
    this.popupProvider.ionicConfirm(null, message, okText, cancelText).then((ok: boolean) => {
      if (!ok) return;

      this.onGoingProcessProvider.set('buyingBitcoin');
      this.coinbaseProvider.init((err: any, res: any) => {
        if (err) {
          this.onGoingProcessProvider.clear();
          this.showError(err);
          return;
        }
        let accessToken = res.accessToken;
        let accountId = res.accountId;
        let dataSrc = {
          amount: this.amount,
          currency: this.currency,
          payment_method: this.selectedPaymentMethodId,
          commit: true
        };
        this.coinbaseProvider.buyRequest(accessToken, accountId, dataSrc, (err: any, b: any) => {
          if (err) {
            this.onGoingProcessProvider.clear();
            this.showError(err);
            return;
          }
          setTimeout(() => {
            let tx = b.data ? b.data.transaction : null;
            if (tx && tx.id) {
              this.processBuyTx(tx);
            }
            else {
              this._processBuyOrder(b);
            }
          }, 8000);
        });
      });
    });
  };

  private processBuyTx(tx: any): void {
    if (!tx) {
      this.onGoingProcessProvider.clear();
      this.showError('Transaction not found');
      return;
    }

    this.coinbaseProvider.getTransaction(this.accessToken, this.accountId, tx.id, (err: any, updatedTx: any) => {
      if (err) {
        this.onGoingProcessProvider.clear();
        this.showError(err);
        return;
      }
      this.walletProvider.getAddress(this.wallet, false).then((walletAddr: string) => {

        updatedTx.data['toAddr'] = walletAddr;
        updatedTx.data['status'] = 'pending'; // Forcing "pending" status to process later

        this.logger.debug('Saving transaction to process later...');
        this.coinbaseProvider.savePendingTransaction(updatedTx.data, {}, (err: any) => {
          this.onGoingProcessProvider.clear();
          if (err) this.logger.debug(err);
          this.openFinishModal();
        });
      }).catch((err) => {
        this.onGoingProcessProvider.clear();
        this.showError(err);
      });
    });
  }

  private _processBuyOrder(b: any): void {
    this.coinbaseProvider.getBuyOrder(this.accessToken, this.accountId, b.data.id, (err: any, buyResp: any) => {
      if (err) {
        this.onGoingProcessProvider.clear();
        this.showError(err);
        return;
      }
      let tx = buyResp.data ? buyResp.data.transaction : null;
      if (tx && tx.id) {
        this.processBuyTx(tx);
      } else {
        setTimeout(() => {
          this._processBuyOrder(b);
        }, 5000);
      }
    });
  }

  public showWallets(): void {
    let id = this.wallet ? this.wallet.credentials.walletId : null;
    this.events.publish('showWalletsSelectorEvent', this.wallets, id, 'Receive in');
    this.events.subscribe('selectWalletEvent', (wallet: any) => {
      if (!_.isEmpty(wallet)) this.onWalletSelect(wallet);
      this.events.unsubscribe('selectWalletEvent');
    });
  }

  public onWalletSelect(wallet: any) {
    this.wallet = wallet;
    let parsedAmount = this.txFormatProvider.parseAmount(this.coin, this.amount, this.currency);

    // Buy always in BTC
    this.amount = (parsedAmount.amountSat / 100000000).toFixed(8);
    this.currency = 'BTC';

    this.amountUnitStr = parsedAmount.amountUnitStr;
    this.onGoingProcessProvider.set('calculatingFee');
    this.coinbaseProvider.checkEnoughFundsForFee(this.amount, (err: any) => {
      this.onGoingProcessProvider.clear();
      if (err) {
        this.showErrorAndBack(err);
        return;
      }
      this.processPaymentInfo();
    });
  }

  private openFinishModal(): void {
    let finishText = 'Bought';
    let finishComment = 'Bitcoin purchase completed. Coinbase has queued the transfer to your selected wallet';
    let modal = this.modalCtrl.create(FinishModalPage, { finishText, finishComment }, { showBackdrop: true, enableBackdropDismiss: false });
    modal.present();
    modal.onDidDismiss(() => {
      this.navCtrl.remove(3, 1);
      this.navCtrl.pop();
      this.navCtrl.push(CoinbasePage, { coin: 'btc' });
    });
  }

}