function _ctPwGenChars(opts) {
        var pools = [];
        if (opts.lower)   pools.push('abcdefghijklmnopqrstuvwxyz');
        if (opts.upper)   pools.push('ABCDEFGHIJKLMNOPQRSTUVWXYZ');
        if (opts.digits)  pools.push('0123456789');
        if (opts.symbols) pools.push('!@#$%^&*()-_=+[]{}<>?,.;:');
        if (!pools.length) pools.push('abcdefghijklmnopqrstuvwxyz');
        return pools;
    }

    function _ctPwGen(len, opts) {
        var pools = _ctPwGenChars(opts);
        var all = pools.join('');
        var buf = new Uint32Array(Math.max(len, pools.length) + 8);
        if (window.crypto && window.crypto.getRandomValues) {
            window.crypto.getRandomValues(buf);
        } else {
            for (var i = 0; i < buf.length; i++) buf[i] = Math.floor(Math.random() * 0xffffffff);
        }
        var pwd = [];
        var idx = 0;
        for (var i = 0; i < pools.length && pwd.length < len; i++, idx++) {
            pwd.push(pools[i].charAt(buf[idx] % pools[i].length));
        }
        while (pwd.length < len) {
            pwd.push(all.charAt(buf[idx] % all.length));
            idx++;
        }
        for (var k = pwd.length - 1; k > 0; k--) {
            var r = buf[(idx + k) % buf.length] % (k + 1);
            var tmp = pwd[k]; pwd[k] = pwd[r]; pwd[r] = tmp;
        }
        return pwd.join('');
    }

    function _ctPwReadOpts() {
        function checked(id, def) {
            var el = document.getElementById(id);
            return el ? !!el.checked : def;
        }
        var lenEl = document.getElementById('pwgen-length');
        var len = lenEl ? parseInt(lenEl.value, 10) : 16;
        if (!isFinite(len) || len < 4) len = 16;
        if (len > 128) len = 128;
        var lenLabel = document.getElementById('pwgen-length-label');
        if (lenLabel) lenLabel.textContent = len;
        return {
            len: len,
            opts: {
                lower:   checked('pwgen-lower', true),
                upper:   checked('pwgen-upper', true),
                digits:  checked('pwgen-digits', true),
                symbols: checked('pwgen-symbols', false)
            }
        };
    }

    function convert(input) {
        var count = parseInt((input || '').trim(), 10);
        if (!isFinite(count) || count < 1) count = 1;
        count = Math.min(count, 200);
        var cfg = _ctPwReadOpts();
        var out = [];
        for (var i = 0; i < count; i++) out.push(_ctPwGen(cfg.len, cfg.opts));
        return out.join('\n');
    }

    $(function(){
        $('#pwgen-length, #pwgen-lower, #pwgen-upper, #pwgen-digits, #pwgen-symbols').on('input change', function(){
            $('#box1').trigger('keyup');
        });
        $('#pwgen-regen').on('click', function(){ $('#box1').trigger('keyup'); });
        setTimeout(function(){
            var box1 = document.getElementById('box1');
            if (box1 && !box1.value) { $(box1).val('1').trigger('keyup'); }
            else { $('#box1').trigger('keyup'); }
        }, 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;

}