var wordwrap = module.exports = function (start, stop, params) {

if (typeof start === 'object') {
    params = start;
    start = params.start;
    stop = params.stop;
}

if (typeof stop === 'object') {
    params = stop;
    start = start || params.start;
    stop = undefined;
}

if (!stop) {
    stop = start;
    start = 0;
}

if (!params) params = {};
var mode = params.mode || 'soft';
var re = mode === 'hard' ? /\b/ : /(\S+\s+)/;

return function (text) {
    var chunks = text.toString()
        .split(re)
        .reduce(function (acc, x) {
            if (mode === 'hard') {
                for (var i = 0; i < x.length; i += stop - start) {
                    acc.push(x.slice(i, i + stop - start));
                }
            }
            else acc.push(x)
            return acc;
        }, [])
    ;

    return chunks.reduce(function (lines, rawChunk) {
        if (rawChunk === '') return lines;

        var chunk = rawChunk.replace(/\t/g, '    ');

        var i = lines.length - 1;
        if (lines[i].length + chunk.length > stop) {
            lines[i] = lines[i].replace(/\s+$/, '');

            chunk.split(/\n/).forEach(function (c) {
                lines.push(
                    new Array(start + 1).join(' ')
                    + c.replace(/^\s+/, '')
                );
            });
        }
        else if (chunk.match(/\n/)) {
            var xs = chunk.split(/\n/);
            lines[i] += xs.shift();
            xs.forEach(function (c) {
                lines.push(
                    new Array(start + 1).join(' ')
                    + c.replace(/^\s+/, '')
                );
            });
        }
        else {
            lines[i] += chunk;
        }

        return lines;
    }, [ new Array(start + 1).join(' ') ]).join('\n');
};

};

wordwrap.soft = wordwrap;

wordwrap.hard = function (start, stop) {

return wordwrap(start, stop, { mode : 'hard' });

};