#!/usr/bin/env bash
set -euo pipefail
umask 077

backend=drm
if [[ ${1:-} == --nested ]]; then
    backend=nested
    shift
fi
if (($#)); then
    echo 'usage: ferese-session [--nested]' >&2
    exit 2
fi
: "${XDG_RUNTIME_DIR:?A login session with XDG_RUNTIME_DIR is required}"

# Resolve once, so upgrading current cannot mix compositor and shell versions.
release_dir=$(dirname -- "$(readlink -f -- "$0")")
state_dir=${XDG_STATE_HOME:-$HOME/.local/state}/ferese
mkdir -p -- "$state_dir"
log_file=$state_dir/session-$(date -u +%Y%m%dT%H%M%SZ)-$$.log
echo "Ferese session log: $log_file" >&2
exec >>"$log_file" 2>&1

export XDG_CURRENT_DESKTOP=Ferese
export XDG_SESSION_DESKTOP=ferese
export XDG_SESSION_TYPE=wayland
export MOZ_ENABLE_WAYLAND=1
export QT_QPA_PLATFORM=wayland
# Used by the area screenshot shortcut; explicitly set 0 to disable capture.
export FERESE_ENABLE_SCREENCOPY=${FERESE_ENABLE_SCREENCOPY:-1}
export PATH="$release_dir:$PATH"
unset WAYLAND_SOCKET
if [[ $backend == drm ]]; then
    unset DISPLAY WAYLAND_DISPLAY
    export FERESE_SESSION_IMPORT_ENV=1
else
    export FERESE_SESSION_IMPORT_ENV=0
fi

if [[ $backend == drm ]] && command -v systemctl >/dev/null; then
    systemctl --user stop swaync.service 2>/dev/null || true
fi

command=("$release_dir/ferese" --backend "$backend" --supervise-client --grant-effects
    --grant-shell-control -- "$release_dir/ferese-session-shell")
if [[ -z ${DBUS_SESSION_BUS_ADDRESS:-} ]]; then
    exec dbus-run-session -- "${command[@]}"
else
    exec "${command[@]}"
fi