/**
 * @workInProgress
 * @ngdoc service
 * @name angular.service.$hover
 * @requires $browser
 * @requires $document
 *
 * @description
 *
 * @example
 */
angularServiceInject("$hover", function(browser, document) {
  var tooltip, self = this, error, width = 300, arrowWidth = 10, body = jqLite(document[0].body);
  browser.hover(function(element, show){
    if (show && (error = element.attr(NG_EXCEPTION) || element.attr(NG_VALIDATION_ERROR))) {
      if (!tooltip) {
        tooltip = {
            callout: jqLite('<div id="ng-callout"></div>'),
            arrow: jqLite('<div></div>'),
            title: jqLite('<div class="ng-title"></div>'),
            content: jqLite('<div class="ng-content"></div>')
        };
        tooltip.callout.append(tooltip.arrow);
        tooltip.callout.append(tooltip.title);
        tooltip.callout.append(tooltip.content);
        body.append(tooltip.callout);
      }
      var docRect = body[0].getBoundingClientRect(),
          elementRect = element[0].getBoundingClientRect(),
          leftSpace = docRect.right - elementRect.right - arrowWidth;
      tooltip.title.text(element.hasClass("ng-exception") ? "EXCEPTION:" : "Validation error...");
      tooltip.content.text(error);
      if (leftSpace < width) {
        tooltip.arrow.addClass('ng-arrow-right');
        tooltip.arrow.css({left: (width + 1)+'px'});
        tooltip.callout.css({
          position: 'fixed',
          left: (elementRect.left - arrowWidth - width - 4) + "px",
          top: (elementRect.top - 3) + "px",
          width: width + "px"
        });
      } else {
        tooltip.arrow.addClass('ng-arrow-left');
        tooltip.callout.css({
          position: 'fixed',
          left: (elementRect.right + arrowWidth) + "px",
          top: (elementRect.top - 3) + "px",
          width: width + "px"
        });
      }
    } else if (tooltip) {
      tooltip.callout.remove();
      tooltip = _null;
    }
  });
}, ['$browser', '$document'], true);
