#!/bin/sh
# wren-empty-workspace: written by Wren Linux parts/core-commands.sh
# Super + the key left of 1: the workspace after the highest one in use, empty, with just your
# wallpaper: somewhere to think about what to run next. With 1, 2, 4 and 5 in use, that is 6.
# Workspace 10 in use: there is no next one, so you stay, and it says so. It does nothing with
# the one-workspace extra, which has no workspaces to go to.
[ ! -e "${XDG_CONFIG_HOME:-$HOME/.config}/sway/config.d/one-workspace.conf" ] || exit 0

# (the highest number with a window on it; 0: none. The scratchpad has number -1.)
highest=$(swaymsg -t get_tree | python3 -I -c '
import json, sys
top = 0
def walk(n, ws=None):
    global top
    if n.get("type") == "workspace":
        ws = n.get("num", -1)
    if n.get("pid") and ws is not None and ws > top:
        top = ws
    for c in n.get("nodes", []) + n.get("floating_nodes", []):
        walk(c, ws)
walk(json.load(sys.stdin))
print(top)') || exit 1

if [ "$highest" -ge 10 ]; then
    notify-send -a wren "No empty workspace" "Workspace 10 is in use, so there is no next one." 2>/dev/null || true
    exit 0
fi
exec swaymsg -q "workspace number $((highest + 1))"