var request = require('request-promise');
var common = require('../../routes/common');
var logger = require('../shared/logger');
var options = {};

decodePaymentFromPaymentRequest = (payment) => {
  options.url = common.getSelLNServerUrl() + '/v1/payreq/' + payment;
  return request(options).then(function(res) {
    logger.log({level: 'DEBUG', fileName: 'PayReq', msg: 'Description', data: res.description});
    return res;
  })
  .catch(err => {});
}

exports.decodePayment = (req, res, next) => {
  logger.log({level: 'INFO', fileName: 'PayRequest', msg: 'Decoding Payment..'});
  options = common.getOptions();
  options.url = common.getSelLNServerUrl() + '/v1/payreq/' + req.params.payRequest;
  request(options).then((body) => {
    logger.log({level: 'DEBUG', fileName: 'PayReq', msg: 'Payment Decode Received', data: body});
    logger.log({level: 'INFO', fileName: 'PayRequest', msg: 'Payment Decoded'});
    res.status(200).json(body);
  })
  .catch(errRes => {
    const err = common.handleError(errRes,  'PayRequest', 'Decode Payment Error');
    return res.status(err.statusCode).json({message: err.message, error: err.error});
  });
};

exports.decodePayments = (req, res, next) => {
  logger.log({level: 'INFO', fileName: 'PayRequest', msg: 'Decoding Payments List..'});
  options = common.getOptions();
  if (req.body.payments) {
    let paymentsArr = req.body.payments.split(',');
    return Promise.all(paymentsArr.map(payment => decodePaymentFromPaymentRequest(payment)))
    .then(function(values) {
      logger.log({level: 'DEBUG', fileName: 'PayReq', msg: 'Decoded Payments', data: values});
      logger.log({level: 'INFO', fileName: 'PayRequest', msg: 'Payment List Decoded'});
      res.status(200).json(values);
    })
    .catch(errRes => {
      const err = common.handleError(errRes,  'PayRequest', 'Decode Payments Error');
      return res.status(err.statusCode).json({message: err.message, error: err.error});
    });    
  } else {
    logger.log({level: 'INFO', fileName: 'PayRequest', msg: 'Empty Payment List Decoded'});
    res.status(200).json([]);
  }
};