#!/bin/bash
# cmd/upgrade_init - pre-upgrade hook (runs before files are replaced)
# 1. Stop the running LangBot instance — whole process group, so stdio
#    children (plugin runtime, Box) die with the parent.
# 2. Sweep stray processes from a previous crash/upgrade: orphans whose
#    parent was hard-killed keep running and hold the runtime/box ws ports,
#    which breaks the next start.

PID_FILE="${TRIM_PKGVAR}/langbot.pid"

if [ -f "${PID_FILE}" ]; then
    PID=$(cat "${PID_FILE}" | tr -d '[:space:]')
    if [ -n "${PID}" ] && kill -0 "${PID}" 2>/dev/null; then
        # Instances started with setsid have PID == PGID; the plain-PID kill
        # covers instances started before that change.
        kill -TERM -- "-${PID}" 2>/dev/null
        kill -TERM "${PID}" 2>/dev/null
        for _ in 1 2 3 4 5 6 7 8 9 10; do
            kill -0 "${PID}" 2>/dev/null || break
            sleep 1
        done
        kill -KILL -- "-${PID}" 2>/dev/null
        kill -KILL "${PID}" 2>/dev/null
    fi
    rm -f "${PID_FILE}"
fi

# Stray sweep: match only our volume paths (venv/uv under the app dir on
# @appcenter, venv/HOME/caches under the data share on @appshare). This
# script itself runs from /var/apps/<appname>/cmd/, so it never matches
# itself. No match is the normal case on a clean upgrade — pkill exits 1.
RUN_USER=$(id -un)
pkill -KILL -u "${RUN_USER}" -f "appcenter/langbot" 2>/dev/null || true
pkill -KILL -u "${RUN_USER}" -f "appshare/langbot" 2>/dev/null || true

exit 0