function _ctUuidV4() {
        if (window.crypto && window.crypto.randomUUID) {
            try { return window.crypto.randomUUID(); } catch (e) {}
        }
        var buf = new Uint8Array(16);
        if (window.crypto && window.crypto.getRandomValues) {
            window.crypto.getRandomValues(buf);
        } else {
            for (var i = 0; i < 16; i++) buf[i] = Math.floor(Math.random() * 256);
        }
        buf[6] = (buf[6] & 0x0f) | 0x40;
        buf[8] = (buf[8] & 0x3f) | 0x80;
        var hex = [];
        for (var j = 0; j < 16; j++) {
            var s = buf[j].toString(16);
            if (s.length < 2) s = '0' + s;
            hex.push(s);
        }
        return hex[0]+hex[1]+hex[2]+hex[3] + '-' + hex[4]+hex[5] + '-' + hex[6]+hex[7] + '-' + hex[8]+hex[9] + '-' + hex[10]+hex[11]+hex[12]+hex[13]+hex[14]+hex[15];
    }

    function convert(input) {
        var raw = (input || '').trim();
        var n = parseInt(raw, 10);
        if (!isFinite(n) || n < 1) n = 1;
        n = Math.min(n, 1000);
        var out = [];
        for (var i = 0; i < n; i++) out.push(_ctUuidV4());
        return out.join('\n');
    }

    $(function(){
        setTimeout(function(){
            var box1 = document.getElementById('box1');
            var box2 = document.getElementById('box2');
            if (box1 && box2 && !box1.value && !box2.value) {
                box2.value = _ctUuidV4();
            }
        }, 50);
    });







var _loadedScripts = {};
function loadScriptPromise(url) {
    if (_loadedScripts[url]) return _loadedScripts[url];
    _loadedScripts[url] = new Promise(function (resolve, reject) {
        var s = document.createElement('script');
        s.src = url;
        s.onload = resolve;
        s.onerror = reject;
        document.head.appendChild(s);
    });
    return _loadedScripts[url];
}

function replaceAll(find, replace, str) {
    return str.replace(new RegExp(find, 'g'), replace);
}

function beautify(str) {


    var result = '';

    var length = str.length;

    var i = 0;

    var braceCountLeft = 0;
    var braceCountRight = 0;

    var withinQuotes = false;

    while (i < length) {

        var c = str[i];

        if (c == '"' && (i == 0 || c[i - 1] != '\\')) {
            // non-escaped quotes
            withinQuotes = !withinQuotes;
        }

        if (!withinQuotes && (c == '}' || c == '{' || c == ',')) {

            console.log('Start####' + result);

            // look back and remove carriage returns and whitespace that are already there

            var resultIndex = result.length - 1;
            while (resultIndex >= 0 && (result[resultIndex] == ' ' || result[resultIndex] == '\r' || result[resultIndex] == '\n' || result[resultIndex] == '\t')) {

                resultIndex = resultIndex - 1;
                result = result.substr(0, resultIndex + 1);

                console.log('char ' + result[resultIndex] + '-----' + result + 'zzz ' + result.length + ' ' + resultIndex);

            }


            if (c == '{') {
                braceCountLeft++;
                result += c + '\r' + GetTabs(braceCountLeft - braceCountRight);
            } else if (c == '}') {
                braceCountRight++;
                // precede with carriage return
                result += '\r' + GetTabs(braceCountLeft - braceCountRight) + c;
            } else if (c == ',') {
                result += c + '\r' + GetTabs(braceCountLeft - braceCountRight);
            }

            var nextChar = '';

            // advance through whitespace and remove carriage returns that are already there
            while (i < length && (str[i + 1] == ' ' || str[i + 1] == '\r' || str[i + 1] == '\n' || str[i + 1] == '\t')) {
                i++;
            }

        } else {

            result += str[i];

        }


        i++;

    }

    return result;

}

function GetTabs(count) {

    var result = '';

    for (var i = 0; i < count; i++) {
        result += '    ';
    }

    return result;

}