var apiKey = '2ff00342e853a86600fdff89903a6c04';
var ID = 43;
var domain = "api.adatjogasz.hu/v1";
var loading = "Betöltés...";
var corsNotSupported = "CORS nem támogatott.";
var errorMSG = "Hiba a lekérdezés során.";

makeCorsRequest(apiKey,ID);


function createCORSRequest(method, url) {
    var xhr = new XMLHttpRequest();
    if ("withCredentials" in xhr) {
        xhr.open(method, url, true);
    } else if (typeof XDomainRequest != "undefined") {
        xhr = new XDomainRequest();
        xhr.open(method, url);
    } else {
        xhr = null;
    }
    return xhr;
}

function makeCorsRequest(apiKey, ID) {
    var target = document.documentElement;
    while (target.childNodes.length && target.lastChild.nodeType == 1) {
        target = target.lastChild;
    }
    var elem = target.parentNode;
    elem.innerHTML = loading;

    var url = "//" + domain + "/getContract.php?apiKey=" + apiKey + "&reqID=" + ID;

    var xhr = createCORSRequest('GET', url);
    if (!xhr) {
        elem.innerHTML = corsNotSupported;
        return;
    }

    xhr.onload = function() {
        var text = xhr.responseText;
        elem.innerHTML = text;
    };

    xhr.onerror = function() {
        console.log(xhr);
        elem.innerHTML = errorMSG;
    };

    xhr.send();
    
    var file = document.createElement("link");
    file.setAttribute("rel", "stylesheet");
    file.setAttribute("type", "text/css");
    file.setAttribute("href", "//" + domain + "/getStyle.php?apiKey=" + apiKey + "&reqID=" + ID);
    document.head.appendChild(file);
}

function makeCorsRequestfromID(apiKey, ID, elemID) {
    var elem = document.getElementById(elemID);
    elem.innerHTML = loading;

    var url = "//" + domain + "/getContract.php?apiKey=" + apiKey + "&reqID=" + ID;

    var xhr = createCORSRequest('GET', url);
    if (!xhr) {
        elem.innerHTML = corsNotSupported;
        return;
    }

    xhr.onload = function() {
        var text = xhr.responseText;
        elem.innerHTML = text;
    };

    xhr.onerror = function() {
        elem.innerHTML = errorMSG;
    };

    xhr.send();
}

function makeCorsRequestfromClassName(apiKey, ID, elemName) {
    var elem = document.getElementsByClassName(elemName);
    for (i = 0; i < elem.length; i++) {
        elem[i].innerHTML = loading;
    }

    var url = "//" + domain + "/getContract.php?apiKey=" + apiKey + "&reqID=" + ID;

    var xhr = createCORSRequest('GET', url);
    if (!xhr) {
        for (i = 0; i < elem.length; i++) {
            elem[i].innerHTML = corsNotSupported;
        }
        return;
    }

    xhr.onload = function() {
        var text = xhr.responseText;
        for (i = 0; i < elem.length; i++) {
            elem[i].innerHTML = text;
        }
    };

    xhr.onerror = function() {
        for (i = 0; i < elem.length; i++) {
            elem[i].innerHTML = errorMSG;
        }
    };

    xhr.send();
}