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/*
Copyright (c) 2009-2017 Braintree, a division of PayPal, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

https://github.com/braintree/credit-card-type


Example

var creditCardType = require('credit-card-type');

var visaCards = creditCardType('4111');
console.log(visaCards[0].type);  // 'visa'

var ambiguousCards = creditCardType('6');
console.log(ambiguousCards.length);       // 3
console.log(ambiguousCards[0].niceType);  // 'Discover'
console.log(ambiguousCards[1].niceType);  // 'UnionPay'
console.log(ambiguousCards[2].niceType);  // 'Maestro'


// ja koska metu lisäsi tähän loppuun kätevän funktion niin:
getCreditCardType('378282246310005');

Returns:
null
Visa
MasterCard
American Express
Diners Club
Discover
JCB
UnionPay
Maestro

*/

'use strict';

var types = {};
var VISA = 'visa';
var MASTERCARD = 'master-card';
var AMERICAN_EXPRESS = 'american-express';
var DINERS_CLUB = 'diners-club';
var DISCOVER = 'discover';
var JCB = 'jcb';
var UNIONPAY = 'unionpay';
var MAESTRO = 'maestro';
var CVV = 'CVV';
var CID = 'CID';
var CVC = 'CVC';
var CVN = 'CVN';
var testOrder = [
  VISA,
  MASTERCARD,
  AMERICAN_EXPRESS,
  DINERS_CLUB,
  DISCOVER,
  JCB,
  UNIONPAY,
  MAESTRO
];

function clone(x) {
  var prefixPattern, exactPattern, dupe;

  if (!x) { return null; }

  prefixPattern = x.prefixPattern.source;
  exactPattern = x.exactPattern.source;
  dupe = JSON.parse(JSON.stringify(x));
  dupe.prefixPattern = prefixPattern;
  dupe.exactPattern = exactPattern;

  return dupe;
}

types[VISA] = {
  niceType: 'Visa',
  type: VISA,
  prefixPattern: /^4$/,
  exactPattern: /^4\d*$/,
  gaps: [4, 8, 12],
  lengths: [16, 18, 19],
  code: {
    name: CVV,
    size: 3
  }
};

types[MASTERCARD] = {
  niceType: 'MasterCard',
  type: MASTERCARD,
  prefixPattern: /^(5|5[1-5]|2|22|222|222[1-9]|2[3-6]|27|27[0-2]|2720)$/,
  exactPattern: /^(5[1-5]|222[1-9]|2[3-6]|27[0-1]|2720)\d*$/,
  gaps: [4, 8, 12],
  lengths: [16],
  code: {
    name: CVC,
    size: 3
  }
};

types[AMERICAN_EXPRESS] = {
  niceType: 'American Express',
  type: AMERICAN_EXPRESS,
  prefixPattern: /^(3|34|37)$/,
  exactPattern: /^3[47]\d*$/,
  isAmex: true,
  gaps: [4, 10],
  lengths: [15],
  code: {
    name: CID,
    size: 4
  }
};

types[DINERS_CLUB] = {
  niceType: 'Diners Club',
  type: DINERS_CLUB,
  prefixPattern: /^(3|3[0689]|30[0-5])$/,
  exactPattern: /^3(0[0-5]|[689])\d*$/,
  gaps: [4, 10],
  lengths: [14],
  code: {
    name: CVV,
    size: 3
  }
};

types[DISCOVER] = {
  niceType: 'Discover',
  type: DISCOVER,
  prefixPattern: /^(6|60|601|6011|65|64|64[4-9])$/,
  exactPattern: /^(6011|65|64[4-9])\d*$/,
  gaps: [4, 8, 12],
  lengths: [16, 19],
  code: {
    name: CID,
    size: 3
  }
};

types[JCB] = {
  niceType: 'JCB',
  type: JCB,
  prefixPattern: /^(2|21|213|2131|1|18|180|1800|3|35)$/,
  exactPattern: /^(2131|1800|35)\d*$/,
  gaps: [4, 8, 12],
  lengths: [16],
  code: {
    name: CVV,
    size: 3
  }
};

types[UNIONPAY] = {
  niceType: 'UnionPay',
  type: UNIONPAY,
  prefixPattern: /^((6|62|62\d|(621(?!83|88|98|99))|622(?!06)|627[02,06,07]|628(?!0|1)|629[1,2])|622018)$/,
  exactPattern: /^(((620|(621(?!83|88|98|99))|622(?!06|018)|62[3-6]|627[02,06,07]|628(?!0|1)|629[1,2]))\d*|622018\d{12})$/,
  gaps: [4, 8, 12],
  lengths: [16, 17, 18, 19],
  code: {
    name: CVN,
    size: 3
  }
};

types[MAESTRO] = {
  niceType: 'Maestro',
  type: MAESTRO,
  prefixPattern: /^(5|5[06-9]|6\d*)$/,
  exactPattern: /^5[06-9]\d*$/,
  gaps: [4, 8, 12],
  lengths: [12, 13, 14, 15, 16, 17, 18, 19],
  code: {
    name: CVC,
    size: 3
  }
};

function creditCardType(cardNumber) {
  var type, value, i;
  var prefixResults = [];
  var exactResults = [];

  if (!(typeof cardNumber === 'string' || cardNumber instanceof String)) {
    return [];
  }

  for (i = 0; i < testOrder.length; i++) {
    type = testOrder[i];
    value = types[type];

    if (cardNumber.length === 0) {
      prefixResults.push(clone(value));
      continue;
    }

    if (value.exactPattern.test(cardNumber)) {
      exactResults.push(clone(value));
    } else if (value.prefixPattern.test(cardNumber)) {
      prefixResults.push(clone(value));
    }
  }

  return exactResults.length ? exactResults : prefixResults;
}

creditCardType.getTypeInfo = function (type) {
  return clone(types[type]);
};

creditCardType.types = {
  VISA: VISA,
  MASTERCARD: MASTERCARD,
  AMERICAN_EXPRESS: AMERICAN_EXPRESS,
  DINERS_CLUB: DINERS_CLUB,
  DISCOVER: DISCOVER,
  JCB: JCB,
  UNIONPAY: UNIONPAY,
  MAESTRO: MAESTRO
};

//module.exports = creditCardType;



// METUN OMA LISÄYS LOPPUUN
function getCreditCardType (creditCardNumber) {
	var creditCardNumber = creditCardNumber.replace(/ /g, '');
	if (creditCardNumber == '') {
		return null;	
	}
	var type = creditCardType(creditCardNumber)[0];
	if (type == null) {
		return null;
	} else {
		return type.niceType;
	}
}