'use strict';

var BackupService = function($rootScope, notification) {
  this.$rootScope = $rootScope;
  this.notifications = notification;
};

BackupService.prototype.getCopayer = function(wallet) {
  return wallet.totalCopayers > 1 ? wallet.getMyCopayerNickname() : '';
};

BackupService.prototype._download = function(ew, walletName, filename) {
  var blob = new Blob([ew], {
    type: 'text/plain;charset=utf-8'
  });

  this.notifications.success('Backup created', 'Encrypted backup file saved');

  // otherwise lean on the browser implementation
  saveAs(blob, filename);
};

BackupService.prototype.walletEncrypted = function(wallet) {
  return wallet.exportEncrypted(this.$rootScope.iden.password);
}

BackupService.prototype.walletDownload = function(wallet) {
  var ew = this.walletEncrypted(wallet);
  var walletName = wallet.getName();
  var copayerName = this.getCopayer(wallet);
  var filename = (copayerName ? copayerName + '-' : '') + walletName + '-keybackup.json.aes';
  this._download(ew, walletName, filename)
};

BackupService.prototype.profileEncrypted = function(iden) {
  return iden.exportEncryptedWithWalletInfo(iden.password);
}

BackupService.prototype.profileDownload = function(iden) {
  var ew = this.profileEncrypted(iden);
  iden.setBackupDone();
  var name = iden.fullName;
  var filename = name + '-profile.json';
  this._download(ew, name, filename)
};

angular.module('copayApp.services').service('backupService', BackupService);