/**
 * @fileOverview Test the paycode generation libraries
 */
'use strict';
/* eslint max-nested-callbacks: ["error", 7] */

const chai = require('chai');

const utils = require('../../ComServe/utils.js');
const paycodes = require('../paycodes.js');

const expect = chai.expect;

const PAYCODE_LENGTH_DEFAULT = 5;
const PAYCODE_BANK_DEFAULT = paycodes.PAYCODE_METHODS[0];

const SUCCESSFUL_VALIDATION = utils.createError(10000, 'Success');

describe('paycodes', () => {
    describe('simplePayCode', () => {
        it('generates a 5-character string', () => {
            expect(paycodes.simplePayCode())
                .to.be.a('string')
                .to.have.lengthOf(PAYCODE_LENGTH_DEFAULT);
        });

        it('generates a string from only the utils.paycodeString characters', () => {
            const paycodeStringRegex = new RegExp(
                '^[' + utils.paycodeString + ']+$'
            );
            expect(paycodes.simplePayCode())
                .to.match(paycodeStringRegex);
        });

        it('generates a different string every time', () => {
            const code1 = paycodes.simplePayCode();
            const code2 = paycodes.simplePayCode();

            expect(code1).to.not.equal(code2);
        });

        it('generates a string that passes paycodeValidate', () => {
            const code = paycodes.simplePayCode();

            expect(paycodes.payCodeValidate(code))
                .to.deep.equal(SUCCESSFUL_VALIDATION);
        });
    });

    describe('payCodeGeneration', () => {
        describe('only allows specific lengths to be generated', () => {
            it('<5 is INVALID ', () => {
                expect(paycodes.payCodeGeneration(utils.paycodeString, 4, PAYCODE_BANK_DEFAULT))
                    .to.equal(-1);
            });

            for (let i = 5; i < 9; ++i) {
                it(i + ' is VALID ', () => {
                    expect(paycodes.payCodeGeneration(utils.paycodeString, i, PAYCODE_BANK_DEFAULT))
                        .to.be.a('string')
                        .to.have.lengthOf(i);
                });
            }

            it('9 is INVALID ', () => {
                expect(paycodes.payCodeGeneration(utils.paycodeString, 9, PAYCODE_BANK_DEFAULT))
                    .to.equal(-1);
            });

            it('10 is VALID ', () => {
                expect(paycodes.payCodeGeneration(utils.paycodeString, 10, PAYCODE_BANK_DEFAULT))
                    .to.be.a('string')
                    .to.have.lengthOf(10);
            });

            it('>10 is INVALID ', () => {
                expect(paycodes.payCodeGeneration(utils.paycodeString, 11, PAYCODE_BANK_DEFAULT))
                    .to.equal(-1);
            });
        });

        describe('only allows specific methods', () => {
            paycodes.PAYCODE_METHODS.forEach((method) => {
                it('"' + method + '" is VALID', () => {
                    expect(paycodes.payCodeGeneration(utils.paycodeString, PAYCODE_LENGTH_DEFAULT, method))
                        .to.be.a('string')
                        .to.have.lengthOf(PAYCODE_LENGTH_DEFAULT);
                });
            });

            it('other values are INVALID', () => {
                expect(paycodes.payCodeGeneration(utils.paycodeString, PAYCODE_LENGTH_DEFAULT, 'other values'))
                    .to.equal(-1);
            });
        });

        describe('supports a limited range of character sets', () => {
            const validCharacterSets = [
                'paycodeString'
            ];
            const invalidCharacterSets = [
                'generalText',
                'fullAlphaNumeric',
                'alpha',
                'lowerCaseHex',
                'numeric',
                'hexadecimal'
            ];

            validCharacterSets.forEach((charset) => {
                const list = utils[charset];
                describe('utils.' + charset + ' is VALID', () => {
                    it('generates a string of the required length', () => {
                        expect(paycodes.payCodeGeneration(list, PAYCODE_LENGTH_DEFAULT, PAYCODE_BANK_DEFAULT))
                            .to.be.a('string')
                            .to.have.lengthOf(PAYCODE_LENGTH_DEFAULT);
                    });

                    it('generates a string from only the provided characters', () => {
                        const paycodeStringRegex = new RegExp(
                            '^[' + list + ']+$'
                        );
                        expect(paycodes.payCodeGeneration(list, PAYCODE_LENGTH_DEFAULT, PAYCODE_BANK_DEFAULT))
                            .to.match(paycodeStringRegex);
                    });

                    it('generates a different string every time', () => {
                        const code1 = paycodes.payCodeGeneration(list, PAYCODE_LENGTH_DEFAULT, PAYCODE_BANK_DEFAULT);
                        const code2 = paycodes.payCodeGeneration(list, PAYCODE_LENGTH_DEFAULT, PAYCODE_BANK_DEFAULT);

                        expect(code1).to.not.equal(code2);
                    });

                    it('generates a string that passes paycodeValidate', () => {
                        const code = paycodes.payCodeGeneration(list, PAYCODE_LENGTH_DEFAULT, PAYCODE_BANK_DEFAULT);

                        expect(paycodes.payCodeValidate(code))
                            .to.deep.equal(SUCCESSFUL_VALIDATION);
                    });
                });
            });

            invalidCharacterSets.forEach((charset) => {
                const list = utils[charset];
                it.skip('utils.' + charset + ' is INVALID', () => {
                    expect(paycodes.payCodeGeneration(list, PAYCODE_LENGTH_DEFAULT, PAYCODE_BANK_DEFAULT))
                        .to.equal(-1);
                });
            });
        });
    });
});