/*
 * Class that provides the top navbar functionality.
 *
 * @class MainNavbar
 */

(function() {
  PixelAdmin.MainNavbar = function() {
    this._scroller = false;
    this._wheight = null;
    this.scroll_pos = 0;
    return this;
  };


  /*
   * Initialize plugin.
   */

  PixelAdmin.MainNavbar.prototype.init = function() {
    var is_mobile;
    this.$navbar = $('#main-navbar');
    this.$header = this.$navbar.find('.navbar-header');
    this.$toggle = this.$navbar.find('.navbar-toggle:first');
    this.$collapse = $('#main-navbar-collapse');
    this.$collapse_div = this.$collapse.find('> div');
    is_mobile = false;
    $(window).on('pa.screen.small pa.screen.tablet', (function(_this) {
      return function() {
        if (_this.$navbar.css('position') === 'fixed') {
          _this._setupScroller();
        }
        return is_mobile = true;
      };
    })(this)).on('pa.screen.desktop', (function(_this) {
      return function() {
        _this._removeScroller();
        return is_mobile = false;
      };
    })(this));
    return this.$navbar.on('click', '.nav-icon-btn.dropdown > .dropdown-toggle', function(e) {
      if (is_mobile) {
        e.preventDefault();
        e.stopPropagation();
        document.location.href = $(this).attr('href');
        return false;
      }
    });
  };


  /*
   * Attach scroller to navbar collapse.
   */

  PixelAdmin.MainNavbar.prototype._setupScroller = function() {
    if (this._scroller) {
      return;
    }
    this._scroller = true;
    this.$collapse_div.pixelSlimScroll({});
    this.$navbar.on('shown.bs.collapse.mn_collapse', $.proxy(((function(_this) {
      return function() {
        _this._updateCollapseHeight();
        return _this._watchWindowHeight();
      };
    })(this)), this)).on('hidden.bs.collapse.mn_collapse', $.proxy(((function(_this) {
      return function() {
        _this._wheight = null;
        return _this.$collapse_div.pixelSlimScroll({
          scrollTo: '0px'
        });
      };
    })(this)), this)).on('shown.bs.dropdown.mn_collapse', $.proxy(this._updateCollapseHeight, this)).on('hidden.bs.dropdown.mn_collapse', $.proxy(this._updateCollapseHeight, this));
    return this._updateCollapseHeight();
  };


  /*
   * Detach scroller from navbar collapse.
   */

  PixelAdmin.MainNavbar.prototype._removeScroller = function() {
    if (!this._scroller) {
      return;
    }
    this._wheight = null;
    this._scroller = false;
    this.$collapse_div.pixelSlimScroll({
      destroy: 'destroy'
    });
    this.$navbar.off('shown.bs.collapse.mn_collapse');
    this.$navbar.off('hidden.bs.collapse.mn_collapse');
    this.$navbar.off('shown.bs.dropdown.mn_collapse');
    this.$navbar.off('hidden.bs.dropdown.mn_collapse');
    return this.$collapse.attr('style', '');
  };


  /*
   * Update navbar collapse height.
   */

  PixelAdmin.MainNavbar.prototype._updateCollapseHeight = function() {
    var h_height, scrollTop, w_height;
    if (!this._scroller) {
      return;
    }
    w_height = $(window).innerHeight();
    h_height = this.$header.outerHeight();
    scrollTop = this.$collapse_div.scrollTop();
    if ((h_height + this.$collapse_div.css({
      'max-height': 'none'
    }).outerHeight()) > w_height) {
      this.$collapse_div.css({
        'max-height': w_height - h_height
      });
    } else {
      this.$collapse_div.css({
        'max-height': 'none'
      });
    }
    return this.$collapse_div.pixelSlimScroll({
      scrollTo: scrollTop + 'px'
    });
  };


  /*
   * Detecting a change of the window height.
   */

  PixelAdmin.MainNavbar.prototype._watchWindowHeight = function() {
    var checkWindowInnerHeight;
    this._wheight = $(window).innerHeight();
    checkWindowInnerHeight = (function(_this) {
      return function() {
        if (_this._wheight === null) {
          return;
        }
        if (_this._wheight !== $(window).innerHeight()) {
          _this._updateCollapseHeight();
        }
        _this._wheight = $(window).innerHeight();
        return setTimeout(checkWindowInnerHeight, 100);
      };
    })(this);
    return window.setTimeout(checkWindowInnerHeight, 100);
  };

  PixelAdmin.MainNavbar.Constructor = PixelAdmin.MainNavbar;

  PixelAdmin.addInitializer(function() {
    return PixelAdmin.initPlugin('main_navbar', new PixelAdmin.MainNavbar);
  });

}).call(this);