'use strict'

module.exports = function pull (a) {
  var length = arguments.length
  if (typeof a === 'function' && a.length === 1) {
    var args = new Array(length)
    for(var i = 0; i < length; i++)
      args[i] = arguments[i]
    return function (read) {
      args.unshift(read)
      return pull.apply(null, args)
    }
  }

  var read = a

  if (read && typeof read.source === 'function') {
    read = read.source
  }

  for (var i = 1; i < length; i++) {
    var s = arguments[i]
    if (typeof s === 'function') {
      read = s(read)
    } else if (s && typeof s === 'object') {
      s.sink(read)
      read = s.source
    }
  }

  return read
}