if (typeof module !== 'undefined') {
    var assert = require('assert');
    var sinon = require('sinon');
    var faker = require('../index');
}

faker.seed(1234);

describe('finance.js', function () {
    describe('account( length )', function () {

        it('should supply a default length if no length is passed', function () {

            var account = faker.finance.account();

            var expected = 8;
            var actual = account.length;

            assert.strictEqual(actual, expected, 'The expected default account length is ' + expected + ' but it was ' + actual);

        });

        it('should supply a length if a length is passed', function () {

            var expected = 9;

            var account = faker.finance.account(expected);

            var actual = account.length;

            assert.strictEqual(actual, expected, 'The expected default account length is ' + expected + ' but it was ' + actual);

        });

        it('should supply a default length if a zero is passed', function () {

            var expected = 8;

            var account = faker.finance.account(0);

            var actual = account.length;

            assert.strictEqual(actual, expected, 'The expected default account length is ' + expected + ' but it was ' + actual);

        });

    });

    describe('accountName()', function () {

        it("should return an account name", function () {

            var actual = faker.finance.accountName();

            assert.ok(actual);

        });

    });

    describe('routingNumber()', function () {

        it("should return a routing number", function () {

            var actual = faker.finance.routingNumber();

            assert.ok(actual);

        });

    });

    describe('mask( length, parens, ellipsis )', function () {
        it("should set a default length", function () {

            var expected = 4; //default account mask length

            var mask = faker.finance.mask(null, false, false);

            var actual = mask.length;

            assert.strictEqual(actual, expected, 'The expected default mask length is ' + expected + ' but it was ' + actual);

        });

        it("should set a specified length", function () {

            var expected = faker.datatype.number(20);

            expected = (expected == 0 || !expected || typeof expected == 'undefined') ? 4 : expected;

            var mask = faker.finance.mask(expected, false, false);

            var actual = mask.length; //picks 4 if the random number generator picks 0

            assert.strictEqual(actual, expected, 'The expected default mask length is ' + expected + ' but it was ' + actual);

        });

        it("should set a default length of 4 for a zero value", function () {

            var expected = 4;

            faker.finance.mask(0, false, false);

            var actual = 4; //picks 4 if the random number generator picks 0

            assert.strictEqual(actual, expected, 'The expected default mask length is ' + expected + ' but it was ' + actual);

        });


        it("should by default include parentheses around a partial account number", function () {

            var expected = true;

            var mask = faker.finance.mask(null, null, false);

            var regexp = new RegExp(/(\(\d{4}?\))/);
            var actual = regexp.test(mask);

            assert.strictEqual(actual, expected, 'The expected match for parentheses is ' + expected + ' but it was ' + actual);

        });

        it("should by default include an ellipsis", function () {

            var expected = true;

            var mask = faker.finance.mask(null, false, null);

            var regexp = new RegExp(/(\.\.\.\d{4})/);
            var actual = regexp.test(mask);

            assert.strictEqual(actual, expected, 'The expected match for parentheses is ' + expected + ' but it was ' + actual);

        });

        it("should work when random variables are passed into the arguments", function () {

            var length = faker.datatype.number(20);
            var ellipsis = (length % 2 === 0) ? true : false;
            var parens = !ellipsis;

            var mask = faker.finance.mask(length, ellipsis, parens);
            assert.ok(mask);

        });


    });

    describe('amount(min, max, dec, symbol)', function () {

        it("should use the default amounts when not passing arguments", function () {
            var amount = faker.finance.amount();

            assert.ok(amount);
            assert.strictEqual((amount > 0), true, "the amount should be greater than 0");
            assert.strictEqual((amount < 1001), true, "the amount should be greater than 0");

        });

        it("should use the default decimal location when not passing arguments", function () {

            var amount = faker.finance.amount();

            var decimal = '.';
            var expected = amount.length - 3;
            var amount = faker.finance.amount(100, 100, 1);

            assert.ok(amount);
            assert.strictEqual(amount , '100.0', "the amount should be equal 100.0");
        });

        //TODO: add support for more currency and decimal options
        it("should not include a currency symbol by default", function () {

            var amount = faker.finance.amount();

            var regexp = new RegExp(/[0-9.]/);

            var expected = true;
            var actual = regexp.test(amount);

            assert.strictEqual(actual, expected, 'The expected match should not include a currency symbol');
        });


        it("it should handle negative amounts", function () {

            var amount = faker.finance.amount(-200, -1);

            assert.ok(amount);
            assert.strictEqual((amount < 0), true, "the amount should be greater than 0");
            assert.strictEqual((amount > -201), true, "the amount should be greater than 0");
        });


        it("it should handle argument dec", function () {

            var amount = faker.finance.amount(100, 100, 1);

            assert.ok(amount);
            assert.strictEqual(amount , "100.0", "the amount should be equal 100.0");
        });

        it("it should handle argument dec = 0", function () {

            var amount = faker.finance.amount(100, 100, 0);

            assert.ok(amount);
            assert.strictEqual(amount , '100', "the amount should be equal 100");
        });

        it("it should return a string", function() {

            var amount = faker.finance.amount(100, 100, 0);

            var typeOfAmount = typeof amount;

            assert.ok(amount);
            assert.strictEqual(typeOfAmount , "string", "the amount type should be number");
        });

        [false, undefined].forEach(function (autoFormat){
            it(`should return unformatted if autoformat is ${autoFormat}`, function() {

                const number = 6000;
                const amount = faker.finance.amount(number, number, 0, undefined, autoFormat);

                assert.strictEqual(amount, number.toString());
            });
        });

        it("should return the number formatted on the current locale", function() {

            const number = 6000, decimalPlaces = 2;
            const expected = number.toLocaleString(undefined, {minimumFractionDigits: decimalPlaces});

            const amount = faker.finance.amount(number, number, decimalPlaces, undefined, true);

            assert.strictEqual(amount, expected);
        });

    });

    describe('transactionType()', function () {

        it("should return a random transaction type", function () {
            var transactionType = faker.finance.transactionType();

            assert.ok(transactionType);
        });
    });

    describe("currencyCode()", function () {
        it("returns a random currency code with a format", function () {
            var currencyCode = faker.finance.currencyCode();

            assert.ok(currencyCode.match(/^[A-Z]{3}$/));
        });
    });

    describe("bitcoinAddress()", function(){
        it("returns a random bitcoin address", function(){
            var bitcoinAddress = faker.finance.bitcoinAddress();

            /**
             *  Note: Although the total length of a Bitcoin address can be 25-33 characters, regex quantifiers only check the preceding token
             *  Therefore we take one from the total length of the address not including the first character ([13])
             */

            assert.ok(bitcoinAddress.match(/^[13][a-km-zA-HJ-NP-Z1-9]{24,33}$/));
        });
    });

    describe("litecoinAddress()", function(){
        it("returns a random litecoin address", function(){
            var litecoinAddress = faker.finance.litecoinAddress();

          assert.ok(litecoinAddress.match(/^[LM3][1-9a-km-zA-HJ-NP-Z]{25,32}$/));
        });
    });

    describe("ethereumAddress()", function(){
        it("returns a random ethereum address", function(){
            var ethereumAddress = faker.finance.ethereumAddress();
            assert.ok(ethereumAddress.match(/^(0x)[0-9a-f]{40}$/));
        });
    });

    describe("creditCardNumber()", function(){
      var luhnFormula = require("./support/luhnCheck.js");

      it("returns a random credit card number", function(){
        var number = faker.finance.creditCardNumber();
        number = number.replace(/\D/g,""); // remove formating
        console.log("version:", process.version, number, number.length);
        assert.ok(number.length >= 13 && number.length <= 20);
        assert.ok(number.match(/^[0-9]{13,20}$/));
        assert.ok(luhnFormula(number));
      });

      it("returns a valid credit card number", function(){
        assert.ok(luhnFormula(faker.finance.creditCardNumber("")));
        assert.ok(luhnFormula(faker.finance.creditCardNumber()));
        assert.ok(luhnFormula(faker.finance.creditCardNumber()));
        assert.ok(luhnFormula(faker.finance.creditCardNumber("visa")));
        assert.ok(luhnFormula(faker.finance.creditCardNumber("mastercard")));
        assert.ok(luhnFormula(faker.finance.creditCardNumber("discover")));
        assert.ok(luhnFormula(faker.finance.creditCardNumber()));
        assert.ok(luhnFormula(faker.finance.creditCardNumber()));
      });
      it("returns a correct credit card number when issuer provided", function(){
        //TODO: implement checks for each format with regexp
        var visa = faker.finance.creditCardNumber("visa");
        assert.ok(visa.match(/^4(([0-9]){12}|([0-9]){3}(\-([0-9]){4}){3})$/));
        assert.ok(luhnFormula(visa));


        var mastercard = faker.finance.creditCardNumber("mastercard");
        assert.ok(mastercard.match(/^(5[1-5]\d{2}|6771)(\-\d{4}){3}$/));
        assert.ok(luhnFormula(mastercard));

        var discover = faker.finance.creditCardNumber("discover");

        assert.ok(luhnFormula(discover));

        var american_express = faker.finance.creditCardNumber("american_express");
        assert.ok(luhnFormula(american_express));
        var diners_club = faker.finance.creditCardNumber("diners_club");
        assert.ok(luhnFormula(diners_club));
        var jcb = faker.finance.creditCardNumber("jcb");
        assert.ok(luhnFormula(jcb));
        var switchC = faker.finance.creditCardNumber("mastercard");
        assert.ok(luhnFormula(switchC));
        var solo = faker.finance.creditCardNumber("solo");
        assert.ok(luhnFormula(solo));
        var maestro = faker.finance.creditCardNumber("maestro");
        assert.ok(luhnFormula(maestro));
        var laser = faker.finance.creditCardNumber("laser");
        assert.ok(luhnFormula(laser));
        var instapayment = faker.finance.creditCardNumber("instapayment");
        assert.ok(luhnFormula(instapayment));
      });
      it("returns custom formated strings",function(){
        var number = faker.finance.creditCardNumber("###-###-##L");
        assert.ok(number.match(/^\d{3}\-\d{3}\-\d{3}$/));
        assert.ok(luhnFormula(number));
        number =faker.finance.creditCardNumber("234[5-9]#{999}L");
        assert.ok(number.match(/^234[5-9]\d{1000}$/));
        assert.ok(luhnFormula(number));
      });
    });

    describe("creditCardCVV()", function(){
      it("returns a random credit card CVV", function(){
        var cvv = faker.finance.creditCardCVV();
        assert.ok(cvv.length === 3);
        assert.ok(cvv.match(/^[0-9]{3}$/));
      });
    });


    describe("iban()", function () {
        var ibanLib = require('../lib/iban');
        it("returns a random yet formally correct IBAN number", function () {
            var iban = faker.finance.iban();
            var bban = iban.substring(4) + iban.substring(0, 4);

            assert.strictEqual(ibanLib.mod97(ibanLib.toDigitString(bban)), 1, "the result should be equal to 1");
        });
        it("returns a specific and formally correct IBAN number", function () {
            var iban = faker.finance.iban(false, "DE");
            var bban = iban.substring(4) + iban.substring(0, 4);
            var countryCode = iban.substring(0, 2);

            assert.equal(countryCode, "DE");
            assert.equal(ibanLib.mod97(ibanLib.toDigitString(bban)), 1, "the result should be equal to 1");
        });
        it("throws an error if the passed country code is not supported", function () {
            assert.throws(function() { faker.finance.iban(false, 'AA');}, /Country code AA not supported/);
        });
    });

    describe("bic()", function () {
        var ibanLib = require('../lib/iban');
        it("returns a random yet formally correct BIC number", function () {
            var bic = faker.finance.bic();
            var expr = new RegExp("^[A-Z]{4}(" + ibanLib.iso3166.join("|") + ")[A-Z2-9][A-NP-Z0-9]([A-Z0-9]{3})?$", "i");

            assert.ok(bic.match(expr));
        });
    });

    describe("transactionDescription()", function() {
        beforeEach(function () {
            sinon.spy(faker.helpers, 'createTransaction');
        });

        afterEach(function () {
            faker.helpers.createTransaction.restore();
        });

        it("returns a random transaction description", function() {
            var transactionDescription = faker.finance.transactionDescription();

            assert.ok(transactionDescription);
            assert.ok(faker.helpers.createTransaction.calledOnce);
        });
    });
});