/*!

* iCheck v0.9.1, http://git.io/uhUPMA
* =================================
* Powerful jQuery plugin for checkboxes and radio buttons customization
*
* (c) 2013 Damir Foy, http://damirfoy.com
* MIT Licensed
*/

(function($) {

// Cached vars
var _iCheck = 'iCheck',
  _iCheckHelper = _iCheck + '-helper',
  _checkbox = 'checkbox',
  _radio = 'radio',
  _checked = 'checked',
  _unchecked = 'un' + _checked,
  _disabled = 'disabled',
  _determinate = 'determinate',
  _indeterminate = 'in' + _determinate,
  _update = 'update',
  _type = 'type',
  _click = 'click',
  _touch = 'touchbegin.i touchend.i',
  _add = 'addClass',
  _remove = 'removeClass',
  _callback = 'trigger',
  _label = 'label',
  _cursor = 'cursor',
  _mobile = /ipad|iphone|ipod|android|blackberry|windows phone|opera mini|silk/i.test(navigator.userAgent);

// Plugin init
$.fn[_iCheck] = function(options, fire) {

  // Walker
  var handle = ':' + _checkbox + ', :' + _radio,
    stack = $(),
    walker = function(object) {
      object.each(function() {
        var self = $(this);

        if (self.is(handle)) {
          stack = stack.add(self);
        } else {
          stack = stack.add(self.find(handle));
        };
      });
    };

  // Check if we should operate with some method
  if (/^(check|uncheck|toggle|indeterminate|determinate|disable|enable|update|destroy)$/i.test(options)) {

    // Normalize method's name
    options = options.toLowerCase();

    // Find checkboxes and radio buttons
    walker(this);

    return stack.each(function() {
      if (options == 'destroy') {
        tidy(this, 'ifDestroyed');
      } else {
        operate($(this), true, options);
      };

      // Fire method's callback
      if ($.isFunction(fire)) {
        fire();
      };
    });

  // Customization
  } else if (typeof options == 'object' || !options) {

    // Check if any options were passed
    var settings = $.extend({
        checkedClass: _checked,
        disabledClass: _disabled,
        indeterminateClass: _indeterminate,
        labelHover: true
      }, options),

      selector = settings.handle,
      hoverClass = settings.hoverClass || 'hover',
      focusClass = settings.focusClass || 'focus',
      activeClass = settings.activeClass || 'active',
      labelHover = !!settings.labelHover,
      labelHoverClass = settings.labelHoverClass || 'hover',

      // Setup clickable area
      area = ('' + settings.increaseArea).replace('%', '') | 0;

    // Selector limit
    if (selector == _checkbox || selector == _radio) {
      handle = ':' + selector;
    };

    // Clickable area limit
    if (area < -50) {
      area = -50;
    };

    // Walk around the selector
    walker(this);

    return stack.each(function() {

      // If already customized
      tidy(this);

      var self = $(this),
        node = this,
        id = node.id,

        // Layer styles
        offset = -area + '%',
        size = 100 + (area * 2) + '%',
        layer = {
          position: 'absolute',
          top: offset,
          left: offset,
          display: 'block',
          width: size,
          height: size,
          margin: 0,
          padding: 0,
          background: '#fff',
          border: 0,
          opacity: 0
        },

        // Choose how to hide input
        hide = _mobile ? {
          position: 'absolute',
          visibility: 'hidden'
        } : area ? layer : {
          position: 'absolute',
          opacity: 0
        },

        // Get proper class
        className = node[_type] == _checkbox ? settings.checkboxClass || 'i' + _checkbox : settings.radioClass || 'i' + _radio,

        // Find assigned labels
        label = $(_label + '[for="' + id + '"]').add(self.closest(_label)),

        // Wrap input
        parent = self.wrap('<div class="' + className + '"/>')[_callback]('ifCreated').parent().append(settings.insert),

        // Layer addition
        helper = $('<ins class="' + _iCheckHelper + '"/>').css(layer).appendTo(parent);

      // Finalize customization
      self.data(_iCheck, {o: settings, s: self.attr('style')}).css(hide);
      !!settings.inheritClass && parent[_add](node.className);
      !!settings.inheritID && id && parent.attr('id', _iCheck + '-' + id);
      parent.css('position') == 'static' && parent.css('position', 'relative');
      operate(self, true, _update);

      // Label events
      if (label.length) {
        label.on(_click + '.i mouseenter.i mouseleave.i ' + _touch, function(event) {
          var type = event[_type],
            item = $(this);

          // Do nothing if input is disabled
          if (!node[_disabled]) {

            // Click
            if (type == _click) {
              operate(self, false, true);

            // Hover state
            } else if (labelHover) {

              // mouseleave|touchend
              if (/ve|nd/.test(type)) {
                parent[_remove](hoverClass);
                item[_remove](labelHoverClass);
              } else {
                parent[_add](hoverClass);
                item[_add](labelHoverClass);
              };
            };

            if (_mobile) {
              event.stopPropagation();
            } else {
              return false;
            };
          };
        });
      };

      // Input events
      self.on(_click + '.i focus.i blur.i keyup.i keydown.i keypress.i', function(event) {
        var type = event[_type],
          key = event.keyCode;

        // Click
        if (type == _click) {
          return false;

        // Keydown
        } else if (type == 'keydown' && key == 32) {
          if (!(node[_type] == _radio && node[_checked])) {
            if (node[_checked]) {
              off(self, _checked);
            } else {
              on(self, _checked);
            };
          };

          return false;

        // Keyup
        } else if (type == 'keyup' && node[_type] == _radio) {
          !node[_checked] && on(self, _checked);

        // Focus/blur
        } else if (/us|ur/.test(type)) {
          parent[type == 'blur' ? _remove : _add](focusClass);
        };
      });

      // Helper events
      helper.on(_click + ' mousedown mouseup mouseover mouseout ' + _touch, function(event) {
        var type = event[_type],

          // mousedown|mouseup
          toggle = /wn|up/.test(type) ? activeClass : hoverClass;

        // Do nothing if input is disabled
        if (!node[_disabled]) {

          // Click
          if (type == _click) {
            operate(self, false, true);

          // Active and hover states
          } else {

            // State is on
            if (/wn|er|in/.test(type)) {

              // mousedown|mouseover|touchbegin
              parent[_add](toggle);

            // State is off
            } else {
              parent[_remove](toggle + ' ' + activeClass);
            };

            // Label hover
            if (label.length && labelHover && toggle == hoverClass) {

              // mouseout|touchend
              label[/ut|nd/.test(type) ? _remove : _add](labelHoverClass);
            };
          };

          if (_mobile) {
            event.stopPropagation();
          } else {
            return false;
          };
        };
      });
    });
  } else {
    return this;
  };
};

// Do something with inputs
function operate(input, direct, method) {
  var node = input[0];
    state = /er/.test(method) ? _indeterminate : /bl/.test(method) ? _disabled : _checked,
    active = method == _update ? {
      checked: node[_checked],
      disabled: node[_disabled],
      indeterminate: input.attr(_indeterminate) == 'true' || input.attr(_determinate) == 'false'
    } : node[state];

  // Check, disable or indeterminate
  if (/^(ch|di|in)/.test(method) && !active) {
    on(input, state);

  // Uncheck, enable or determinate
  } else if (/^(un|en|de)/.test(method) && active) {
    off(input, state);

  // Update
  } else if (method == _update) {

    // Handle states
    for (var state in active) {
      if (active[state]) {
        on(input, state, true);
      } else {
        off(input, state, true);
      };
    };

  } else if (!direct || method == 'toggle') {

    // Helper or label was clicked
    if (!direct) {
      input[_callback]('ifClicked');
    };

    // Toggle checked state
    if (active) {
      if (node[_type] !== _radio) {
        off(input, state);
      };
    } else {
      on(input, state);
    };
  };
};

// Add checked, disabled or indeterminate state
function on(input, state, keep) {
  var node = input[0],
    parent = input.parent(),
    checked = state == _checked,
    indeterminate = state == _indeterminate,
    callback = indeterminate ? _determinate : checked ? _unchecked : 'enabled',
    regular = option(node, callback + capitalize(node[_type])),
    specific = option(node, state + capitalize(node[_type]));

  // Prevent unnecessary actions
  if (node[state] !== true) {

    // Toggle assigned radio buttons
    if (!keep && state == _checked && node[_type] == _radio && node.name) {
      var form = input.closest('form'),
        inputs = 'input[name="' + node.name + '"]';

      inputs = form.length ? form.find(inputs) : $(inputs);

      inputs.each(function() {
        if (this !== node && $.data(this, _iCheck)) {
          off($(this), state);
        };
      });
    };

    // Indeterminate state
    if (indeterminate) {

      // Add indeterminate state
      node[state] = true;

      // Remove checked state
      if (node[_checked]) {
        off(input, _checked, 'force');
      };

    // Checked or disabled state
    } else {

      // Add checked or disabled state
      if (!keep) {
        node[state] = true;
      };

      // Remove indeterminate state
      if (checked && node[_indeterminate]) {
        off(input, _indeterminate, false);
      };
    };

    // Trigger callbacks
    callbacks(input, checked, state, keep);
  };

  // Add proper cursor
  if (node[_disabled] && !!option(node, _cursor, true)) {
    parent.find('.' + _iCheckHelper).css(_cursor, 'default');
  };

  // Add state class
  parent[_add](specific || option(node, state));

  // Remove regular state class
  parent[_remove](regular || option(node, callback) || '');
};

// Remove checked, disabled or indeterminate state
function off(input, state, keep) {
  var node = input[0],
    parent = input.parent(),
    checked = state == _checked,
    indeterminate = state == _indeterminate,
    callback = indeterminate ? _determinate : checked ? _unchecked : 'enabled',
    regular = option(node, callback + capitalize(node[_type])),
    specific = option(node, state + capitalize(node[_type]));

  // Prevent unnecessary actions
  if (node[state] !== false) {

    // Toggle state
    if (indeterminate || !keep || keep == 'force') {
      node[state] = false;
    };

    // Trigger callbacks
    callbacks(input, checked, callback, keep);
  };

  // Add proper cursor
  if (!node[_disabled] && !!option(node, _cursor, true)) {
    parent.find('.' + _iCheckHelper).css(_cursor, 'pointer');
  };

  // Remove state class
  parent[_remove](specific || option(node, state) || '');

  // Add regular state class
  parent[_add](regular || option(node, callback));
};

// Remove all traces
function tidy(node, callback) {
  if ($.data(node, _iCheck)) {
    var input = $(node);

    // Remove everything except input
    input.parent().html(input.attr('style', $.data(node, _iCheck).s || '')[_callback](callback || ''));

    // Unbind events
    input.off('.i').unwrap();
    $(_label + '[for="' + node.id + '"]').add(input.closest(_label)).off('.i');
  };
};

// Get some option
function option(node, state, regular) {
  if ($.data(node, _iCheck)) {
    return $.data(node, _iCheck).o[state + (regular ? '' : 'Class')];
  };
};

// Capitalize some string
function capitalize(string) {
  return string.charAt(0).toUpperCase() + string.slice(1);
};

// Executable handlers
function callbacks(input, checked, callback, keep) {
  if (!keep) {
    if (checked) {
      input[_callback]('ifToggled');
    };

    input[_callback]('ifChanged')[_callback]('if' + capitalize(callback));
  };
};

})(jQuery);