/**
 * EGroupware egw_dragdrop_shoelaceTree - 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 {egwActionObjectInterface} from "./egw_action";
import {Et2Tree} from "../etemplate/Et2Tree/Et2Tree";
import {EGW_AI_DRAG_ENTER, EGW_AI_DRAG_OUT, EGW_AO_STATE_FOCUSED, EGW_AO_STATE_SELECTED} from "./egw_action_constants";
import {egwBitIsSet} from "./egw_action_common";
import {SlTreeItem} from "@shoelace-style/shoelace";
import {EgwActionObject} from "./EgwActionObject";


export const EXPAND_FOLDER_ON_DRAG_DROP_TIMEOUT = 1000

export class EgwDragDropShoelaceTree extends egwActionObjectInterface{
    node: SlTreeItem;
    id: string;
    tree: Et2Tree;

	// Reference to the widget that's handling actions for us
	public findActionTargetHandler : EgwActionObject;

	private timeout : ReturnType<typeof setTimeout>;

	constructor(_tree : Et2Tree)
	{

		super();
		this.tree = _tree
		this.findActionTargetHandler = _tree.widget_object;
	}

	public doTriggerEvent(egw_event : number, dom_event : Event)
	{
		const target = this.tree.findActionTarget(dom_event);
		if(egw_event == EGW_AI_DRAG_ENTER)
		{
			target.target.classList.add("draggedOver", "drop-hover");
			this.timeout = setTimeout(() =>
			{
				if(target.target.classList.contains("draggedOver"))
				{
					(<SlTreeItem>target.target).expanded = true
				}
			}, EXPAND_FOLDER_ON_DRAG_DROP_TIMEOUT)
		}
		else if(egw_event == EGW_AI_DRAG_OUT)
		{
			target.target.classList.remove("draggedOver", "drop-hover");
			clearTimeout(this.timeout)
		}
		else
		{
			debugger;
		}
		return true
	}

	public doSetState(_state)
	{
		if(!this.tree || !this.tree.focusItem)
		{
			return;
		}
		if(this.stateChangeContext)
		{
			const target = this.tree.shadowRoot.querySelector("[id='" + this.stateChangeContext.id + "']");

			// Just set the attribute, we're not changing the tree value
			// The selected attribute will be reset by the tree next render()
			if(target && egwBitIsSet(_state, EGW_AO_STATE_SELECTED))
			{
				target.setAttribute("selected", "");
			}
			else if(target)
			{
				target.removeAttribute("selected");
			}
			if(target && egwBitIsSet(_state, EGW_AO_STATE_FOCUSED))
			{
				target.focus();
			}
		}

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

	doGetDOMNode()
	{
		return this.tree;
	}
}