RED.contextMenu = (function() {

    let menu;
    function createMenu() {
        // menu = RED.popover.menu({
        //     options: [
        //         {
        //             label: 'delete selection',
        //             onselect: function() {
        //                 RED.actions.invoke('core:delete-selection')
        //                 RED.view.focus()
        //             }
        //         },
        //         { label: 'world' }
        //     ],
        //     width: 200,
        // })




    }

    function disposeMenu() {
        $(document).off("mousedown.red-ui-workspace-context-menu");
        if (menu) {
            menu.remove();
        }
        menu = null;
    }
    function show(options) {
        if (menu) {
            menu.remove()
        }

        const selection = RED.view.selection()
        const hasSelection = (selection.nodes && selection.nodes.length > 0);
        const hasMultipleSelection = hasSelection && selection.nodes.length > 1;
        const hasLinks = selection.links && selection.links.length > 0;
        const isSingleLink = !hasSelection && hasLinks && selection.links.length === 1
        const isMultipleLinks = !hasSelection && hasLinks && selection.links.length > 1
        const canDelete = hasSelection || hasLinks
        const isGroup = hasSelection && selection.nodes.length === 1 && selection.nodes[0].type === 'group'

        const canRemoveFromGroup = hasSelection && !!selection.nodes[0].g


        const menuItems = [
            { onselect: 'core:show-action-list', onpostselect: function() {} },
            {
                label: RED._("contextMenu.insert"),
                options: [
                    {
                        label: RED._("contextMenu.node"),
                        onselect: function() {
                            RED.view.showQuickAddDialog({
                                position: [ options.x - offset.left, options.y - offset.top ],
                                touchTrigger: true,
                                splice: isSingleLink?selection.links[0]:undefined,
                                // spliceMultiple: isMultipleLinks
                            })
                        }
                    },
                    {
                        label: RED._("contextMenu.junction"),
                        onselect: 'core:split-wires-with-junctions',
                        disabled: hasSelection || !hasLinks
                    },
                    {
                        label: RED._("contextMenu.linkNodes"),
                        onselect: 'core:split-wire-with-link-nodes',
                        disabled: hasSelection || !hasLinks
                    }
                ]



            }
        ]
        // menuItems.push(
        //     {
        //         label: (isSingleLink || isMultipleLinks)?'Insert into wire...':'Add node...',
        //         onselect: function() {
        //             RED.view.showQuickAddDialog({
        //                 position: [ options.x - offset.left, options.y - offset.top ],
        //                 touchTrigger: true,
        //                 splice: isSingleLink?selection.links[0]:undefined,
        //                 spliceMultiple: isMultipleLinks
        //             })
        //         }
        //     },
        // )
        // if (hasLinks && !hasSelection) {
        //     menuItems.push({ onselect: 'core:split-wires-with-junctions', label: 'Insert junction'})
        // }
        menuItems.push(
            null,
            { onselect: 'core:undo', disabled: RED.history.list().length === 0 },
            { onselect: 'core:redo', disabled: RED.history.listRedo().length === 0 },
            null,
            { onselect: 'core:cut-selection-to-internal-clipboard', label: RED._("keyboard.cutNode"), disabled: !hasSelection},
            { onselect: 'core:copy-selection-to-internal-clipboard', label: RED._("keyboard.copyNode"), disabled: !hasSelection },
            { onselect: 'core:paste-from-internal-clipboard', label: RED._("keyboard.pasteNode"), disabled: !RED.view.clipboard() },
            { onselect: 'core:delete-selection', disabled: !canDelete },
            { onselect: 'core:show-export-dialog', label: RED._("menu.label.export") },
            { onselect: 'core:select-all-nodes' }
        )

        if (hasSelection) {
            menuItems.push(
                null,
                isGroup ?
                  { onselect: 'core:ungroup-selection', disabled: !isGroup }
                : { onselect: 'core:group-selection', disabled: !hasSelection }
            )
            if (canRemoveFromGroup) {
                menuItems.push({ onselect: 'core:remove-selection-from-group', label: RED._("menu.label.groupRemoveSelection") })
            }

        }
        const offset = $("#red-ui-workspace-chart").offset()
        menu = RED.menu.init({
            direction: 'right',
            onpreselect: function() {
                disposeMenu()
            },
            onpostselect: function() {
                RED.view.focus()
            },
            options: menuItems
        });

        menu.attr("id","red-ui-workspace-context-menu");
        menu.css({
            position: "absolute"
        })
        menu.appendTo("body");

        // TODO: prevent the menu from overflowing the window.

        var top = options.y
        var left = options.x

        if (top+menu.height()-$(document).scrollTop() > $(window).height()) {
            top -= (top+menu.height())-$(window).height() + 22;
        }
        if (left+menu.width()-$(document).scrollLeft() > $(window).width()) {
            left -= (left+menu.width())-$(window).width() + 18;
        }
        menu.css({
            top: top+"px",
            left: left+"px"
        })
        $(".red-ui-menu.red-ui-menu-dropdown").hide();
        $(document).on("mousedown.red-ui-workspace-context-menu", function(evt) {
            if (menu && menu[0].contains(evt.target)) {
                return
            }
            disposeMenu()
        });
        menu.show();

        // menu.show({
        //     target: $('#red-ui-main-container'),
        //     x: options.x,
        //     y: options.y
        // })


    }

    return {
        show: show
    }
})()