import {opApiModule} from './../../../angular-modules';
//-- copyright
// OpenProject is a project management system.
// Copyright (C) 2012-2015 the OpenProject Foundation (OPF)
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License version 3.
//
// OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
// Copyright (C) 2006-2013 Jean-Philippe Lang
// Copyright (C) 2010-2013 the ChiliProject Team
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
//
// See doc/COPYRIGHT.rdoc for more details.
//++

import {opUiComponentsModule} from '../../../angular-modules';

interface DragScrollData {
  delta: {
    x: number,
    y: number
  };

  
}

function opDragScroll() {
  return {
    restrict: 'A',
    link: function(scope:ng.IScope, element:ng.IAugmentedJQuery, attr:ng.IAttributes) {
      const eventName = 'op:dragscroll';

      // Is mouse down?
      var mousedown = false;

      // Position of last mousedown
      var mousedownX:number, mousedownY:number;

      // Mousedown: Potential drag start
      element.on('mousedown', (evt:JQueryEventObject) => {
        setTimeout(() => {
          mousedown = true;
          mousedownX = evt.clientX;
          mousedownY = evt.clientY;
        }, 50, false);
      });

      // Mouseup: Potential drag stop
      element.on('mouseup', () => { mousedown = false; });

      // Mousemove: Report movement if mousedown
      element.on('mousemove', (evt:JQueryEventObject) => {
         if (!mousedown) {
           return;
         }

        // Trigger drag scroll event
        element.trigger(eventName, {
          x: evt.clientX - mousedownX,
          y: evt.clientY - mousedownY
        });

        // Update last mouse position
        mousedownX = evt.clientX;
        mousedownY = evt.clientY;
      });
    }
  };
}

opUiComponentsModule.directive('opDragScroll', opDragScroll);