/*!
 * 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/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);