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"use strict";
Math.seed = function(s) {
    var m_w  = s;
    var m_z  = 987654321;
    var mask = 0xffffffff;

    return function() {
      m_z = (36969 * (m_z & 65535) + (m_z >> 16)) & mask;
      m_w = (18000 * (m_w & 65535) + (m_w >> 16)) & mask;

      var result = ((m_z << 16) + m_w) & mask;
      result /= 4294967296;

      return result + 0.5;
    }
}

let globalSeed = Math.seed(Math.floor(Math.random * 100000));

function mispell(input, ratio) {
    input = input.toLowerCase().split(' ').reverse();
    let built = [];
    let count = 0;
    let last = false;
    for (let x of input) {
        x = x.replace(/\W/g, '');
        if(count >= (ratio * Math.floor(input.length * 0.1 + 1)) || last) {
            last = false;
            built.push(x);
            continue;
        }
        last = true;
        let tmp = [];
        for (let x2 of x) tmp.push(x2);
        let swap = Math.floor(getRandomArbitrary(0, tmp.length - 1));
        let temp = tmp[swap];
        tmp[swap] = tmp[swap + 1];
        tmp[swap + 1] = temp;

        count++;

        built.push(tmp.join(''));
    }
    return built.reverse().join(' ');
}

function getRandomArbitrary(min, max) {
    return globalSeed() * (max - min) + min;
}

mispell('Funny Turtle', 1);

walk(document.body);
setTimeout(function() {
    walk(document.body);
}, 1000);

function walk(node) {
    // Source: http://is.gd/mwZp7E

    var child, next;

    switch (node.nodeType) {
        case 1: // Element
        case 9: // Document
        case 11: // Document fragment
            child = node.firstChild;
            while (child) {
                next = child.nextSibling;
                walk(child);
                child = next;
            }
            break;

        case 3: // Text node
            handleText(node);
            break;
    }
}

function handleText(textNode) {
    var v = textNode.nodeValue;

    v = mispell(v, 1);

    textNode.nodeValue = v;
}