/* globals describe,  beforeEach, afterEach, it */
/**
 *  Unit testing file for the worldpay_acquirer
 */
'use strict';
const testGlobals = require('../../../tools/test/testGlobals.js');
const chai = require('chai');
const sinon = require('sinon');
const sinonChai = require('sinon-chai');
const chaiAsPromised = require('chai-as-promised');
const rewire = require('rewire');

/**
 * Use `rewire` instead of require so that we can access private functions for test
 */
const recoveryController = rewire('../api_recovery_controller.js');

const expect = chai.expect;

chai.use(sinonChai);
chai.use(chaiAsPromised);

//
// Array of test cases for testing comparison of answers to expected values.
// The anwers are in [type, expected, actual] order
//
const kbaTestCases = [
    {
        name: '1 of each type (exact match)',
        valid: true,
        data: [
            ['postcode', 'KA9 2HD', 'KA9 2HD'],
            ['card', '000', '000'],
            ['transactions', 0, '0'],
            ['device', '+4477777777', '+4477777777'],
            ['dob', '1970-01-01', '1970-01-01']
        ]
    },
    {
        name: 'postcode with space differences 1',
        valid: true,
        data: [
            ['postcode', 'KA9 2HD', 'KA92HD']
        ]
    },
    {
        name: 'postcode with space differences 2',
        valid: true,
        data: [
            ['postcode', 'KA92HD', 'KA9 2HD']
        ]
    },
    {
        name: 'postcode with case differences 1',
        valid: true,
        data: [
            ['postcode', 'KA9 2HD', 'ka9 2hd']
        ]
    },
    {
        name: 'postcode with case differences 2',
        valid: true,
        data: [
            ['postcode', 'ka9 2hd', 'KA9 2HD']
        ]
    },
    {
        name: 'postcode with many case and space differences',
        valid: true,
        data: [
            ['postcode', 'k A 9 2 h D', 'Ka92Hd']
        ]
    },
    {
        name: 'postcode with missing last char',
        valid: false,
        data: [
            ['postcode', 'KA9 2HD', 'KA9 2H']
        ]
    },
    {
        name: 'postcode with homograph chars (the 2nd K is 0x039A GREEK CAPIAL LETTER KAPPA!)',
        valid: false,
        data: [
            ['postcode', 'KA9 2HD', 'ΚA9 2HD']
        ]
    },
    {
        name: 'card with a different value',
        valid: false,
        data: [
            ['card', '123', '124']
        ]
    },
    {
        name: 'card with a Number rather than a string',
        valid: false,
        data: [
            ['card', '123', 123]
        ]
    },
    {
        name: 'card with missing leading 0 ("012" != "12")',
        valid: false,
        data: [
            ['card', '012', '12']
        ]
    },
    {
        name: '1 expected transaction',
        valid: true,
        data: [
            ['transactions', 1, '1']
        ]
    },
    {
        name: '2 expected transactions (still bucket 1-2)',
        valid: true,
        data: [
            ['transactions', 2, '1']
        ]
    },
    {
        name: '3 expected transactions',
        valid: true,
        data: [
            ['transactions', 3, '3']
        ]
    },
    {
        name: '4 expected transactions (still bucket 3-4)',
        valid: true,
        data: [
            ['transactions', 4, '3']
        ]
    },
    {
        name: '5 expected transactions',
        valid: true,
        data: [
            ['transactions', 5, '5']
        ]
    },
    {
        name: '6 expected transactions (still bucket 5+)',
        valid: true,
        data: [
            ['transactions', 6, '5']
        ]
    },
    {
        name: '100 expected transactions (still bucket 5+)',
        valid: true,
        data: [
            ['transactions', 100, '5']
        ]
    },
    {
        name: 'actual transactions not a valid bucket (2)',
        valid: false,
        data: [
            ['transactions', 2, '2']
        ]
    },
    {
        name: 'actual transactions not a valid bucket (4)',
        valid: false,
        data: [
            ['transactions', 4, '4']
        ]
    },
    {
        name: 'actual transactions not a valid bucket (6)',
        valid: false,
        data: [
            ['transactions', 6, '6']
        ]
    },
    {
        name: 'actual transactions not a valid bucket (99)',
        valid: false,
        data: [
            ['transactions', 99, '99']
        ]
    },
    {
        name: 'actual transactions don\'t match',
        valid: false,
        data: [
            ['transactions', 1, '0']
        ]
    },
    {
        name: 'device number doesn\'t match',
        valid: false,
        data: [
            ['device', '+447700900123', '+447700900124']
        ]
    },
    {
        name: 'non-international format number',
        valid: false,
        data: [
            ['device', '+447700900123', '07700900123']
        ]
    },
    {
        name: 'date of birth in ISO 8601 with a time',
        valid: true,
        data: [
            ['dob', '1970-01-02', '1970-01-02T01:23:45']
        ]
    },
    {
        name: 'date of birth in ISO 8601 without a time',
        valid: true,
        data: [
            ['dob', '1970-02-03', '1970-02-03']
        ]
    },
    {
        name: 'wrong day only',
        valid: false,
        data: [
            ['dob', '1970-01-01', '1970-01-02']
        ]
    },
    {
        name: 'wrong month only',
        valid: false,
        data: [
            ['dob', '1970-01-01', '1970-02-01']
        ]
    },
    {
        name: 'wrong year only',
        valid: false,
        data: [
            ['dob', '1970-01-01', '1971-01-01']
        ]
    },
    {
        name: 'date of birth in a non-ISO 8601 format (long)',
        valid: false,
        data: [
            ['dob', '1970-01-01', '1st January 1970']
        ]
    },
    {
        name: 'date of birth in a non-ISO 8601 format (short)',
        valid: false,
        data: [
            ['dob', '1970-01-01', '01/01/1970']
        ]
    }
];

/**
 * Converts the above test cases to the formats expected by the verifyAnswers().
 *
 * @param {Object[]} cases  - List of test cases.
 *
 * @returns {Object}        - Object with list of expected results and answers to test with.
 */
function testCaseToVerifyAnswers(cases) {
    const result = {
        expected: [],
        actual: []
    };

    for (let i = 0; i < cases.length; ++i) {
        const tc = cases[i];

        result.expected.push({
            questionID: i,
            questionType: tc[0],
            answer: tc[1]
        });

        result.actual.push({
            questionID: i,
            questionType: tc[0],
            answer: tc[2]
        });
    }

    return result;
}

/**
 * Unit test definitions
 */
describe('api_recovery_controller', () => {
    describe('verifyAnswers', () => {
        /**
         * Get the private function using the `rewire`-ed controller object.
         */
        const verifyAnswers = recoveryController.__get__('verifyAnswers');

        for (let i = 0; i < kbaTestCases.length; ++i) {
            /**
             * Get the testcase, then the test data in the correct format.
             */
            const tc = kbaTestCases[i];
            const tcConverted = testCaseToVerifyAnswers(tc.data);

            /**
             * Build a meaningful name for the test.
             */
            let name = tc.valid ? 'should accept ' : 'should NOT accept ';

            name += tc.name;

            /**
             * Run a test for this case.
             */
            it(name, () => {
                const expected = expect(verifyAnswers(tcConverted.actual, tcConverted.expected));

                if (tc.valid) {
                    return expected.to.eventually.be.fulfilled;
                } else {
                    return expected.to.eventually.be.rejected;
                }
            });
        }
    });
});