
+function ($) { "use strict";

  // BUTTON PUBLIC CLASS DEFINITION
  // ==============================

  var Button = function (element, options) {
    this.$element = $(element)
    this.options  = $.extend({}, Button.DEFAULTS, options)
  }

  Button.DEFAULTS = {
    loadingText: 'loading...'
  }

  Button.prototype.setState = function (state) {
    var d    = 'disabled'
    var $el  = this.$element
    var val  = $el.is('input') ? 'val' : 'html'
    var data = $el.data()

    state = state + 'Text'

    if (!data.resetText) $el.data('resetText', $el[val]())

    $el[val](data[state] || this.options[state])

    // push to event loop to allow forms to submit
    setTimeout(function () {
      state == 'loadingText' ?
        $el.addClass(d).attr(d, d) :
        $el.removeClass(d).removeAttr(d);
    }, 0)
  }

  Button.prototype.toggle = function () {
    var $parent = this.$element.closest('[data-toggle="buttons"]')
    var changed = true

    if ($parent.length) {
      var $input = this.$element.find('input')
      if ($input.prop('type') === 'radio') {
        // see if clicking on current one
        if ($input.prop('checked') && this.$element.hasClass('active'))
          changed = false
        else
          $parent.find('.active').removeClass('active')
      }
      if (changed) $input.prop('checked', !this.$element.hasClass('active')).trigger('change')
    }

    if (changed) this.$element.toggleClass('active')
  }


  // BUTTON PLUGIN DEFINITION
  // ========================

  var old = $.fn.button

  $.fn.button = function (option) {
    return this.each(function () {
      var $this   = $(this)
      var data    = $this.data('bs.button')
      var options = typeof option == 'object' && option

      if (!data) $this.data('bs.button', (data = new Button(this, options)))

      if (option == 'toggle') data.toggle()
      else if (option) data.setState(option)
    })
  }

  $.fn.button.Constructor = Button


  // BUTTON NO CONFLICT
  // ==================

  $.fn.button.noConflict = function () {
    $.fn.button = old
    return this
  }


  // BUTTON DATA-API
  // ===============

  $(document).on('click.bs.button.data-api', '[data-toggle^=button]', function (e) {
    var $btn = $(e.target)
    if (!$btn.hasClass('btn')) $btn = $btn.closest('.btn')
    $btn.button('toggle')
    e.preventDefault()
  })

}(jQuery);