/**
 * EGroupware egw_dragdrop_dhtmlxmenu - egw action framework
 *
 * @link https://www.egroupware.org
 * @author Andreas Stöckel <as@stylite.de>
 * @copyright 2011 by Andreas Stöckel
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
 * @package egw_action
 */


import {egwBitIsSet} from "./egw_action_common";
import {EGW_AI_DRAG_OUT, EGW_AI_DRAG_OVER, EGW_AO_STATE_FOCUSED, EGW_AO_STATE_SELECTED} from "./egw_action_constants";
import {egwActionObjectInterface} from "./egw_action";

/**
 * This file contains an egw_actionObjectInterface which allows a dhtmlx tree
 * row to be a drag target and contains a function which transforms a complete
 * dhtmlx tree into egw_actionObjects
 */
declare class dhtmlXTreeObject
{

	_globalIdStorageFind(_itemId: string): any
}

export function dhtmlxTree_getNode(_tree: dhtmlXTreeObject, _itemId: string)
{
	const node = _tree._globalIdStorageFind(_itemId);
	if (node != null)
	{
		// Get the outer html table node of the tree node - return the first
		// "tr" child of the element
		return node.htmlNode.querySelector("tr:first-child")
	}
}

// An action object interface for an dhtmlxTree entry - it only contains the
// code needed for drag/drop handling
export class dhtmlxtreeItemAOI
{
	constructor(_tree, _itemId)
	{

		const aoi = new egwActionObjectInterface();

		// Retrieve the actual node from the tree
		aoi.node = dhtmlxTree_getNode(_tree, _itemId);
		aoi.id = _itemId;
		aoi.doGetDOMNode = function () {
			return aoi.node;
		}

		aoi.doTriggerEvent = function (_event) {
			if (_event == EGW_AI_DRAG_OVER)
			{
				jQuery(this.node).addClass("draggedOver");
			}
			if (_event == EGW_AI_DRAG_OUT)
			{
				jQuery(this.node).removeClass("draggedOver");
			}
		}

		aoi.doSetState = function (_state) {
			if (!_tree || !_tree.focusItem) return;

			// Update the "focused" flag
			if (egwBitIsSet(_state, EGW_AO_STATE_FOCUSED))
			{
				_tree.focusItem(this.id);
			}
			if (egwBitIsSet(_state, EGW_AO_STATE_SELECTED))
			{
				_tree.selectItem(this.id, false);	// false = do not trigger onSelect
			}
		}

		return aoi;
	}
}