#!/bin/sh
#
# Copyright (C) 2026 Danilo M. <danix@danix.xyz>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.

# restart.sh <repo> <shell>...: reload.sh on the named shells, then one
# notification saying which came back. A shell came back when qs lists an
# instance on its config path under a pid it did not have before, within 5s:
# the old instance can still be listed for a moment after qs kill, and a
# config that fails to load exits rather than lingering.
#
# ponytail: "came back" is the process, not the config. A shell that loads
# with a broken component still counts; its log says so.

root=$(cd "$1" && pwd) || exit 1
shift

# The pids qs lists for <shell>'s config path, one per line.
pids() {
    qs list --all 2>/dev/null | awk -v p="Config path: $root/$1/shell.qml" '
        /Process ID:/ { id = $3 } index($0, p) { print id }'
}

old=""
for n; do old="$old $(pids "$n")"; done

"$root/reload.sh" "$@" >/dev/null 2>&1

good=""
bad=""
for n; do
    back=""
    for _ in 1 2 3 4 5 6 7 8 9 10; do
        for p in $(pids "$n"); do
            case " $old " in *" $p "*) ;; *) back=1 ;; esac
        done
        [ -n "$back" ] && break
        sleep 0.5
    done
    if [ -n "$back" ]; then good="$good $n"; else bad="$bad $n"; fi
done

if [ -n "$bad" ]; then
    notify-send --app-name=Keystone --urgency=critical --icon=dialog-error \
        "Shells" "Did not come back:$bad${good:+. Restarted:$good}"
else
    notify-send --app-name=Keystone --icon=dialog-information "Shells" "Restarted:$good"
fi