#!/bin/sh

if [ -n "$SHELL" ] &&
   grep -q "$SHELL" /etc/shells &&
   ! (echo "$SHELL" | grep -q "false") &&
   ! (echo "$SHELL" | grep -q "nologin"); then
  if [ "$1" != '-l' ]; then
    exec bash -c "exec -l '$SHELL' -c '$0 -l $*'"
  else
    shift
  fi
fi

# Make sure there's no already running session.
if systemctl --user -q is-active niri.service; then
  echo 'A niri session is already running.'
  exit 1
fi

# Reset failed state of all user units.
systemctl --user reset-failed

# Import the login manager environment.
systemctl --user import-environment

# DBus activation environment is independent from systemd. While most of
# dbus-activated services are already using `SystemdService` directive, some
# still don't and thus we should set the dbus environment with a separate
# command.
if hash dbus-update-activation-environment 2>/dev/null; then
    dbus-update-activation-environment --all
fi

# Start niri and wait for it to terminate.
systemctl --user --wait start niri.service

# Force stop of graphical-session.target.
systemctl --user start --job-mode=replace-irreversibly niri-shutdown.target

# Unset environment that we've set.
systemctl --user unset-environment WAYLAND_DISPLAY XDG_SESSION_TYPE XDG_CURRENT_DESKTOP NIRI_SOCKET