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var countries = require('./countries');
var Locale = require('dw/util/Locale');
var Site = require('dw/system/Site');

/**
 * @description filter out the countries array to return only ones that are allowed in
 * site's allowedLocales
 * @return {array} allowedCountries array of countries that have allowed locales
 */
function getCountries() {
    var site =Site.getCurrent();
    var allowedLocales = site.getAllowedLocales();
    var allowedCountries = countries.filter(function (country) {
        var hasAllowedLocale = false;
        // loop over allowed locales
        for (var i = 0; i < allowedLocales.length; i++) {
            var locale = Locale.getLocale(allowedLocales[i]);
            if (country.countryCode === locale.country) {
                hasAllowedLocale = true;
                break;
            }
        }
        return hasAllowedLocale;
    });
    return allowedCountries;
}

function getAllLanguages() {
    var allCountriesLanguages = new Object();
    var allowedCountries = getCountries();
    allowedCountries.forEach(function (country) {
        var countryLanguages = new Array();
        country.languages.forEach(function (language) {
            countryLanguages.push(language.toLowerCase());
        });
        allCountriesLanguages[country.countryCode] = countryLanguages;
    });
    return allCountriesLanguages;
}

function getCountriesGroupedBy(group) {
    var countries = getCountries();
    var countriesGrouped = {};
    countries.forEach(function (country) {
        var key = country.hasOwnProperty(group) ? country[group] : undefined;
        if (countriesGrouped.hasOwnProperty(key)) {
            countriesGrouped[key].push(country);
        } else {
            countriesGrouped[key] = [country];
        }
    });
    return countriesGrouped;
}

/**
 * @description iterate over the countries array, find the first country that has the current locale
 * @param {PipelineDictionary} pdict the current pdict object
 * @return {object} country the object containing the country's settings
 */
function getCurrent(pdict) {
    if (!countries || countries.length === 0) {
        return;
    }
    var currentLocale = Locale.getLocale(pdict.CurrentRequest.locale);
    var country;
    if (!currentLocale.country) {
        return countries[0]; // return the first in the list if the requested one is not available
    }
    for (var i = 0; i < countries.length; i++) {
        var _country = countries[i];
        if (_country.countryCode === currentLocale.country) {
            country = _country;
            break;
        }
    }
    return country || countries[0];  // return the first in the list if the requested one is not available
};

function getLanguages (currentCountry) {
    var result = [];
    currentCountry.languages.forEach(function (language) {
        result.push(language);
    });
    return result;
}

exports.getCountries = getCountries;
exports.getCountriesGroupedBy = getCountriesGroupedBy;
exports.getCurrent = getCurrent;
exports.getLanguages = getLanguages;
exports.getAllLanguages = getAllLanguages;