#!/bin/bash

set -e

# From: https://people.debian.org/~mpitt/systemd.conf-2016-graphical-session.pdf

# robustness: if the previous graphical session left some failed units,
# reset them so that they don't break this startup
for unit in $(systemctl --user --no-legend --state=failed --plain list-units | cut -f1 -d' '); do
    partof="$(systemctl --user show -p PartOf --value "$unit")"
    for target in cosmic-session.target graphical-session.target; do
        if [ "$partof" = "$target" ]; then
            systemctl --user reset-failed "$unit"
            break
        fi
    done
done

# use the user's preferred shell to acquire environment variables
# see: https://github.com/pop-os/cosmic-session/issues/23
if [ -n "${SHELL}" ]; then
    # --in-login-shell: our flag to indicate that we don't need to recurse any further
    if [ "${1}" != "--in-login-shell" ]; then
        # `exec -l`: like `login`, prefixes $SHELL with a hyphen to start a login shell
        exec bash -c "exec -l '${SHELL}' -c '${0} --in-login-shell'"
    fi
fi

export XDG_CURRENT_DESKTOP="${XDG_CURRENT_DESKTOP:=COSMIC}"
export XDG_SESSION_TYPE="${XDG_SESSION_TYPE:=wayland}"
export XCURSOR_THEME="${XCURSOR_THEME:=Pop}"
export _JAVA_AWT_WM_NONREPARENTING=1
export GDK_BACKEND=wayland,x11
export MOZ_ENABLE_WAYLAND=1
export QT_QPA_PLATFORM="wayland;xcb"

# import environment variables from the login manager
systemctl --user import-environment XDG_SESSION_TYPE XDG_CURRENT_DESKTOP

# Run cosmic-session
if [[ -z "${DBUS_SESSION_BUS_ADDRESS}" ]]; then
    exec /usr/bin/dbus-run-session -- /usr/bin/cosmic-session
else
    exec /usr/bin/cosmic-session
fi
