var _ = require('underscore')

module.exports = {
  makeGatherable: function () {
    var TheObj = function (obj) {
      if (obj instanceof TheObj) return obj
      if (!(this instanceof TheObj)) return new TheObj(obj)
      this._wrapped = obj
    }
    return TheObj
  },
  prototypeGather: function (thObj) {
    return function (obj) {
      var instance = thObj(obj)
      instance._gather = []
      return instance
    }
  },
  prototypeGatherBuilder: function (theObj) {
    return _.map(_.functions(theObj), function (name) {
      var func = theObj[name]
      theObj.prototype[name] = function () {
        var args = _.values(arguments)
        this._gather.push(func.apply(theObj, args))
        return this
      }
    })
  },
  prototypeGatherValue: function () {
    return function () {
      return this._gather
    }
  },
  extendGatherable: function (theObj) {
    var gatherable = {}
    gatherable.gather = _.prototypeGather(theObj)
    _.extend(theObj, gatherable)
    gatherable.prototype = _.prototypeGatherBuilder(theObj)
    gatherable.prototype.value = _.prototypeGatherValue()
    _.extend(theObj.prototype, gatherable.prototype)
  }
}