import Toybox.Lang;
import Toybox.WatchUi;

// Routes menu input. UP/DOWN rotate the ring. START/STOP opens
// the selected item. Tap on an icon rotates to it; tap on the
// already-selected icon opens it.
class MenuDelegate extends WatchUi.BehaviorDelegate {

    private var _view as MenuView;
    private var _tapHandled as Boolean = false;

    function initialize(view as MenuView) {
        BehaviorDelegate.initialize();
        _view = view;
    }

    function onNextPage() as Boolean {
        _view.rotateNext();
        return true;
    }

    function onPreviousPage() as Boolean {
        _view.rotatePrev();
        return true;
    }

    function onTap(evt as WatchUi.ClickEvent) as Boolean {
        var coords = evt.getCoordinates();
        var tapX = coords[0] as Number;
        var tapY = coords[1] as Number;
        var idx = _view.itemIndexAt(tapX, tapY);

        if (idx >= 0 && idx != _view.selectedIndex()) {
            // Tap on non-selected icon → rotate to it, block onSelect.
            _view.rotateTo(idx);
            _tapHandled = true;
            return true;
        }

        // Tap on selected icon or empty area → let onSelect handle it.
        return false;
    }

    function onSelect() as Boolean {
        // If a tap already handled this event, skip.
        if (_tapHandled) {
            _tapHandled = false;
            return true;
        }
        return _openSelected();
    }

    private function _openSelected() as Boolean {
        var item = _view.selectedItem();
        var key = item[:key] as String;

        if (key.equals(Config.ACTION_HISTORY)) {
            var view = new HistoryView();
            WatchUi.pushView(view, new HistoryDelegate(view), WatchUi.SLIDE_LEFT);
            return true;
        }
        if (key.equals(Config.ACTION_DELETE)) {
            var view = new DeleteView();
            WatchUi.pushView(view, new DeleteDelegate(view), WatchUi.SLIDE_LEFT);
            return true;
        }

        WatchUi.pushView(new LoadingView(key), new LoadingDelegate(), WatchUi.SLIDE_IMMEDIATE);
        return true;
    }
}