#!/bin/bash

subnum=({0..100})
declare -A pids labels
busname=$(xprop -id $1 _GTK_UNIQUE_BUS_NAME     | cut -d \" -f 2)
objpath=$(xprop -id $1 _GTK_MENUBAR_OBJECT_PATH | cut -d \" -f 2)

while IFS=\| read id pos sid action label; do
    pid=${pids[$id]}
    label=${label//_/}

    [[ $pid ]] &&
    label="${labels[$id]} > $label"

    if [[ $2 == "$label" ]]; then
        busctl --user  -j call $busname $objpath \
        org.gtk.Actions Activate sava{sv} -- "${action#unity.}" 0 0
        exit
    fi

    if [[ $sid ]]; then
        pids[$sid]="$pid.$sid"
        labels[$sid]="$label"
    else
        echo "$pid.$id.$pos.$(( ++i )) $label"
    fi
done < <( # {{{
    busctl --user  -j call $busname $objpath \
    org.gtk.Menus Start au -- ${#subnum[@]} ${subnum[@]} | jq -r '
        .data[] | .[] |
        .[0] as $id   |
        .[1] as $pos  |
    (.[2] | .[] | select(.label) | [$id, $pos, (.":submenu".data | .[0]), .action.data, .label.data] | @tsv)
    ' | tr \\t \|
) | # }}}
sort -k 1,1V | cut -d ' ' -f 2-

################################################################################

busaddr=$(busctl --user -j call \
com.canonical.AppMenu.Registrar \
/com/canonical/AppMenu/Registrar com.canonical.AppMenu.\
Registrar GetMenuForWindow u $1 | jq -r '.data | join(" ")')

while read id label; do
    if [[ $2 == "$label" ]]; then
        busctl --user -j call $busaddr \
        com.canonical.dbusmenu Event isvu -- $id clicked i 0 $(date +%s)
        exit
    fi

    echo "$label"
done < <( # {{{
    busctl --user -j call $busaddr \
    com.canonical.dbusmenu GetLayout -- iias 0 -1 0 |
    jq -r  '.' --tab | awk '
        BEGIN {
            split("", tree)
        }

        /\s+[0-9]+/ {
            id = int($1)
            next
        }

        /"data": "submenu"/ {
            submenu = ""
            next
        }

        /"data": "radio"/     { next }
        /"data": "separator"/ { next }
        /"data": "checkmark"/ { next }

        /"data": "/ {
            gsub("_", "")
            sub(/"$/, "")
            sub(/"data": "/, "")

            if (!submenu){
                submenu  = $0

                last  = count
                count = gsub(/\t/, "", submenu)

                for (i in tree){
                    if (count < last && i >= last)
                        delete tree[i]
                }

                tree[count]=$0
                next
            }

            menu = ""
            for (i in tree)
                menu = (menu ? menu " > " : "") tree[i]

            sub(/^\s+/, "")
            gsub(/\t+/, "", menu)

            printf "%d %s > %s\n", id, menu, $0
            # menus[id]=id " " menu " > " $0
        }
    '
) # }}}