var consentManager = {};
consentManager.ajax = (function () {

    var csrfToken = "htxGjx7DY00Ddee197BiH2BG4ZrStLoeG0qm7GGDyQqaQZZKHbynzzInkGA6ZXUc";

    var serializeData = function (data) {
        var serialized = "";
        if (!data) {
            return serialized;
        }
        for (var key in data) {
            if (!data.hasOwnProperty(key)) {
                continue;
            }
            if (serialized !== "") {
                serialized += "&";
            }
            serialized += key + "=" + encodeURIComponent(data[key])
        }
        return serialized;
    };

    var prepareUrl = function (url, data) {
        url += (url.indexOf('?') === -1) ? '?' : '&';
        return attachVersion(url + serializeData(data));
    };

    var makeRequest = function (type, options, callback) {
        if (!options.url) {
            throw new Error("Missing request url");
        }

        var method = type.toUpperCase() || "GET";
        var data = options.data || {};
        var url = method === 'POST' ? options.url : prepareUrl(options.url, options.data);

        var request = XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject('Microsoft.XMLHTTP');
        request.open(method, url, true);
        request.setRequestHeader("X-CSRFToken", csrfToken);

        request.onload = function () {
            if (callback && typeof(callback) === "function") {
                var data = request.responseText;
                try {
                    data = JSON.parse(request.responseText);
                } catch (e) {
                    //
                }
                callback(data, request.status, request);
            }
        };

        var postData = undefined;
        if (method === 'POST') {
            request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
            postData = serializeData(data);
        }
        request.send(postData);
    };

    var get = function (options, callback) {
        return makeRequest('GET', options, callback);
    };

    var post = function (options, callback) {
        return makeRequest('POST', options, callback);
    };

    var attachVersion = function (urlString, paramName) {
        urlString += (urlString.indexOf('?') === -1) ? '?' : '&';
        urlString += (paramName | 'v') + '=' + getRandomString();

        return urlString;
    };

    var getRandomString = function () {
        var randLetters = Math.random().toString(36).substring(2) + Math.random().toString(36).substring(2);
        return Date.now() + '.' + randLetters + '.';
    };

    return {
        get: get,
        post: post,
        getRandomString: getRandomString
    };
})();

consentManager.cookie = (function () {

    var readCookie = function (cookieName) {
        var value = "; " + document.cookie;
        var parts = value.split("; " + cookieName + "=");
        if (parts.length === 2) {
            return parts.pop().split(";").shift();
        }
        return null;
    };

    var setCookie = function (cookieName, value, exdays) {
        var expires = "";
        if (exdays) {
            var exdate = new Date();
            var exhours = 24 * exdays;
            exdate.setHours(exdate.getHours() + exhours);
            expires = "; expires=" + exdate.toUTCString();
        }
        document.cookie = cookieName + "=" + encodeURIComponent(value) + expires + "; path=/";
    };

    var exists = function (cookieName) {
        return readCookie(cookieName) !== null;
    };

    return {
        read: readCookie,
        set: setCookie,
        exists: exists
    };
})();
consentManager.consent = (function () {
    var gdprModalId = 'gdpr_modal';
    var gdprModal = null;

    var url = {
        consentList: "/gdpr/ajax/consents",
        authUserConsent: "/gdpr/ajax/userconsent/",
        consentContent: "/gdpr/ajax/userconsent/"
    };
    var timers = {
        closeTime: 7,
        postpone: 183,
        accept: 604800
    };
    var isUserAuthenticated = false;
    var collectForAnonymous = true;

    var consentList = null;
    var validatedConsents = [];
    var handling = null;

    var init = function () {
        gdprModal = document.getElementById(gdprModalId);
        gdprModal.addEventListener('handled', function (e) {
            handleConsents();
        });
        registerConsentActions();
        fetchConsentList(handleConsents);
    };

    var fetchConsentList = function (callback) {
        consentManager.ajax.get({
            url: url.consentList
        }, function (data, status) {
            if (!data) {
                throw new Error("Unable to fetch consents list");
            }
            consentList = data;
            if (callback && typeof callback === "function") {
                callback(data);
            }
        });
    };

    var handleConsents = function () {
        for (var i in consentList) {
            if (!consentList.hasOwnProperty(i) || validatedConsents.indexOf(consentList[i].code) !== -1) {
                continue;
            }
            if (consentManager.cookie.exists(getCookieName(consentList[i]))) {
                validatedConsents.push(consentList[i].code);
                continue;
            }
            handleConsent(consentList[i]);
            return;
        }
    };

    var handleConsent = function (consent) {
        handling = consent;
        if (isUserAuthenticated) {
            consentManager.ajax.get({
                url: url.authUserConsent + consent.code
            }, function (data, status) {
                if (status !== 200) {
                    raiseModal(consent);
                } else {
                    handleConsents();
                }
            });
        } else {
            if (collectForAnonymous) {
                raiseModal(consent);
            }
        }
    };

    var sendConsentResponse = function (consent, value, cb) {
        consentManager.ajax.post({
            url: url.authUserConsent + consent.code,
            data: {
                response: value
            }
        }, function (data, status) {
            if (status === 200) {
                validatedConsents.push(consent.code); // need to store it manually cos cookie write out is to slow
            } else {
                console.error("An error occurred while trying to send consent response");
            }
            if (cb && typeof cb === "function") {
                cb({
                    consent: consent,
                });
            }
        });
    };

    var raiseModal = function (consent) {
        document.getElementById('js-consent-short-description').innerHTML = consent.short_description;
        $.magnificPopup.open({
            items: {
                src: "#" + gdprModalId,
                type: 'inline',
                mainClass: 'mfp--gdpr'
            },
            modal: true
        });
    };

    var registerConsentActions = function () {
        var consentButtons = document.getElementsByClassName("js-consent-action");
        for (var i in consentButtons) {
            consentButtons[i].onclick = handleConsentAction;
        }
    };

    var getConsentByPropValue = function (propVal, prop) {
        prop = prop || 'code';
        for (var i in consentList) {
            if (!consentList.hasOwnProperty(i)) {
                continue;
            }
            if (consentList[i][prop] === propVal) {
                return consentList[i];
            }
        }
        throw new Error("Missing consent with '" + prop + "': '" + consentCode + "'");
    };

    var handleConsentAction = function () {
        var action = this.getAttribute('data-action');
        var consent = handling;
        switch (action) {
            case 'close':
                consentManager.cookie.set(getCookieName(consent), 0, getExpiryTimeByValue(0));
                closeModal({
                    consent: consent
                });
                break;
            case 'understand':
                consentManager.cookie.set(getCookieName(consent), 1, getExpiryTimeByValue(1));
                closeModal({
                    consent: consent
                });
                break;
            case 'postpone':
                sendConsentResponse(consent, 0, closeModal);
                break;
            case 'accept':
                sendConsentResponse(consent, 1, closeModal);
                break;
            default:
                throw new Error('Undefined consent action');
        }
    };

    var closeModal = function (options) {
        if (!options || !options.consent) {
            throw new Error("Missing consent");
        }
        var consent = options.consent;
        validatedConsents.push(consent.code);
        var event = new Event('handled');
        $.magnificPopup.instance.close();
        gdprModal.dispatchEvent(event);

    };

    var getCookieName = function (consent) {
        if (consent.has_anon_cookie === false) {
            return consent.cookie_name;
        }
        return isUserAuthenticated ? consent.cookie_name : consent.cookie_name_anon;
    };

    var getExpiryTimeByValue = function (value) {
        if (value !== undefined && parseInt(value) === 1) {
            return isUserAuthenticated ? secondsToDays(timers.accept) : timers.postpone;
        }

        return timers.closeTime;
    };

    var secondsToDays = function (seconds) {
        return Math.floor(seconds / 86400);
    };

    return {
        init: init
    };
})();

document.addEventListener("DOMContentLoaded", function (event) {
    consentManager.consent.init();
});