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(/
  /).forEach(function (c) {
                      lines.push(
                          new Array(start + 1).join(' ')
                          + c.replace(/^\s+/, '')
                      );
                  });
              }
              else if (chunk.match(/
  /)) {
                  var xs = chunk.split(/
  /);
                  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('
  ');
      };
  };
  
  wordwrap.soft = wordwrap;
  
  wordwrap.hard = function (start, stop) {
      return wordwrap(start, stop, { mode : 'hard' });
  };