var czrapp = czrapp || {};
/************************************************
* STICKY HEADER SUB CLASS
*************************************************/
(function($, czrapp) {
  var _methods =  {
    init : function() {
      //cache jQuery el
      this.$_sticky_logo    = $('img.sticky', '.site-logo');
      this.$_resetMarginTop = $('#tc-reset-margin-top');
      //subclass properties
      this.elToHide         = []; //[ '.social-block' , '.site-description' ],
      this.customOffset     = TCParams.stickyCustomOffset || {};// defaults : { _initial : 0, _scrolling : 0 }
      this.logo             = 0 === this.$_sticky_logo.length ? { _logo: $('img:not(".sticky")', '.site-logo') , _ratio: '' }: false;
      this.timer            = 0;
      this.increment        = 1;//used to wait a little bit after the first user scroll actions to trigger the timer
      this.triggerHeight    = 20; //0.5 * windowHeight;

      this.scrollingDelay   = 1 != TCParams.timerOnScrollAllBrowsers && czrapp.$_body.hasClass('ie') ? 50 : 5;
    },//init()


    triggerStickyHeaderLoad : function() {
      if ( ! this._is_sticky_enabled() )
        return;

      //LOADING ACTIONS
      czrapp.$_body.trigger( 'sticky-enabled-on-load' , { on : 'load' } );
    },


    stickyHeaderEventListener : function() {
      //LOADING ACTIONS
      var self = this;
      czrapp.$_body.on( 'sticky-enabled-on-load' , function() {
        self.stickyHeaderEventHandler('on-load');
      });//.on()

      //RESIZING ACTIONS
      czrapp.$_window.on( 'tc-resize', function() {
        self.stickyHeaderEventHandler('resize');
      });

      //SCROLLING ACTIONS
      czrapp.$_window.scroll( function() {
        self.stickyHeaderEventHandler('scroll');
      });

      //SIDENAV ACTIONS => recalculate the top offset on sidenav toggle
      czrapp.$_body.on( czrapp.$_body.hasClass('tc-is-mobile') ? 'touchstart' : 'click' , '.sn-toggle', function() {
        self.stickyHeaderEventHandler('sidenav-toggle');
      });
    },



    stickyHeaderEventHandler : function( evt ) {
      if ( ! this._is_sticky_enabled() )
        return;

      var self = this;

      switch ( evt ) {
        case 'on-load' :
          self._prepare_logo_transition();
          setTimeout( function() {
            self._sticky_refresh();
            self._sticky_header_scrolling_actions();
          } , 20 );//setTimeout()
        break;

        case 'scroll' :
          var _delay = 0;

           //use a timer
          if ( this.timer) {
            this.increment++;
            clearTimeout(self.timer);
          }

          if ( this.increment > 5 )
            //decrease the scrolling trigger delay when smoothscroll on to avoid not catching the scroll when scrolling fast and sticky header not already triggered
            _delay = ! ( czrapp.$_body.hasClass('tc-smoothscroll') && ! this._is_scrolling() ) ? this.scrollingDelay : 15;

          this.timer = setTimeout( function() {
              self._sticky_header_scrolling_actions();
          }, _delay );
        break;

        case 'resize' :
        case 'sidenav-toggle' :
          self._set_sticky_offsets();
          self._set_header_top_offset();
          self._set_logo_height();
        break;
      }
    },




    //STICKY HEADER SUB CLASS HELPER (private like)
    _is_scrolling : function() {
      return czrapp.$_body.hasClass('sticky-enabled') ? true : false;
    },

    //STICKY HEADER SUB CLASS HELPER (private like)
    _is_sticky_enabled : function() {
      return czrapp.$_body.hasClass('tc-sticky-header') ? true : false;
    },

    //STICKY HEADER SUB CLASS HELPER (private like)
    _get_top_offset : function() {
      //initialOffset     = ( 1 == isUserLogged &&  580 < $(window).width() ) ? $('#wpadminbar').height() : 0;
      //custom offset : are we scrolling ? => 2 custom top offset values can be defined by users : initial and scrolling
      //make sure custom offset are set and numbers
      var initialOffset   = 0,
          that            = this,
          customOffset    = +this._get_custom_offset( that._is_scrolling() ? '_scrolling' : '_initial' );

      if ( 1 == this.isUserLogged() && ! this.isCustomizing() ) {
        if ( 580 < czrapp.$_window.width() )
          initialOffset = czrapp.$_wpadminbar.height();
        else
          initialOffset = ! this._is_scrolling() ? czrapp.$_wpadminbar.height() : 0;
      }
      return initialOffset + customOffset ;
    },


    //CUSTOM TOP OFFSET
    //return the user defined dynamic or static custom offset
    //custom offset is a localized param that can be passed with the wp filter : tc_sticky_custom_offset
    //its default value is an object : { _initial : 0, _scrolling : 0, options : { _static : true, _element : "" }
    //if _static is set to false and a dom element is provided, then the custom offset will be the calculated height of the element
    _get_custom_offset : function( _context ) {
      //Always check if this.customOffset is well formed
      if ( _.isEmpty( this.customOffset ) )
        return 0;
      if ( ! this.customOffset[_context] )
        return 0;
      if ( ! this.customOffset.options )
        return this.customOffset[_context];

      //always return a static value for the scrolling context;
      if ( '_scrolling' == _context )
        return +this.customOffset[_context] || 0;

      //INITIAL CONTEXT
      //CASE 1 : STATIC
      if ( this.customOffset.options._static )
        return +this.customOffset[_context] || 0;

      var that = this,
          $_el = $(that.customOffset.options._element);

      //CASE 2 : DYNAMIC : based on an element's height
      //does the element exists?
      if ( ! $_el.length )
        return 0;
      else {
        return $_el.outerHeight() || +this.customOffset[_context] || 0;
      }
      return;
    },




    //STICKY HEADER SUB CLASS HELPER (private like)
    _set_sticky_offsets : function() {
      var self = this;

      //Reset all values first
      czrapp.$_tcHeader.css('top' , '');
      czrapp.$_tcHeader.css('height' , 'auto' );
      this.$_resetMarginTop.css('margin-top' , '' ).show();

      //What is the initial offset of the header ?
      var headerHeight    = czrapp.$_tcHeader.outerHeight(true); /* include borders and eventual margins (true param)*/
      //set initial margin-top = initial offset + header's height
      this.$_resetMarginTop.css('margin-top' , + headerHeight  + 'px');
    },

    //STICKY HEADER SUB CLASS HELPER (private like)
    _set_header_top_offset : function() {
      var self = this;
      //set header initial offset
      czrapp.$_tcHeader.css('top' , self._get_top_offset() );
    },

    //STICKY HEADER SUB CLASS HELPER (private like)
    _prepare_logo_transition : function(){
      //do nothing if the browser doesn't support csstransitions (modernizr)
      //or if no logo (includes the case where we have two logos, normal and sticky one)
      if ( ! ( czrapp.$_html.hasClass('csstransitions') && ( this.logo && 0 !== this.logo._logo.length ) ) )
        return;

      var logoW = this.logo._logo.originalWidth(),
          logoH = this.logo._logo.originalHeight();

      //check that all numbers are valid before using division
      if ( 0 === _.size( _.filter( [ logoW, logoH ], function(num){ return _.isNumber( parseInt(num, 10) ) && 0 !== num; } ) ) )
        return;

      this.logo._ratio = logoW / logoH;
      this.logo._logo.css('width' , logoW );
    },

    //STICKY HEADER SUB CLASS HELPER (private like)
    _set_logo_height : function(){
      if ( this.logo && 0 === this.logo._logo.length || ! this.logo._ratio )
        return;
      var self = this;
      this.logo._logo.css('height' , self.logo._logo.width() / self.logo._ratio );

      setTimeout( function() {
          self._set_sticky_offsets();
          self._set_header_top_offset();
      } , 200 );
    },

    _sticky_refresh : function() {
      var self = this;
      setTimeout( function() {
          self._set_sticky_offsets();
          self._set_header_top_offset();
      } , 20 );
      czrapp.$_window.trigger('resize');
    },


    //SCROLLING ACTIONS
    _sticky_header_scrolling_actions : function() {
      this._set_header_top_offset();

      var self = this;
      //process scrolling actions
      if ( czrapp.$_window.scrollTop() > this.triggerHeight ) {
        if ( ! this._is_scrolling() )
            czrapp.$_body.addClass("sticky-enabled").removeClass("sticky-disabled");
      }
      else if ( this._is_scrolling() ){
        czrapp.$_body.removeClass("sticky-enabled").addClass("sticky-disabled");
        setTimeout( function() { self._sticky_refresh(); } ,
          self.isCustomizing ? 100 : 20
        );
        //additional refresh for some edge cases like big logos
        setTimeout( function() { self._sticky_refresh(); } , 200 );
      }
    }
  };//_methods{}

  czrapp.methods.Czr_StickyHeader = {};
  $.extend( czrapp.methods.Czr_StickyHeader , _methods );

})(jQuery, czrapp);
