#!/bin/bash
# postrm: truenas-proxmox-multipath remove/purge script
set -e

PLUGIN_DST="/usr/share/perl5/PVE/Storage/Custom/TrueNASMultipath.pm"
JS_DST="/usr/share/pve-manager/js/truenas-multipath.js"
TPL="/usr/share/pve-manager/index.html.tpl"
MULTIPATH_CONF="/etc/multipath.conf"
BLOCK_BEGIN="# BEGIN truenas-proxmox-multipath"
BLOCK_END="# END truenas-proxmox-multipath"
LOG_FILE="/var/log/truenas-proxmox-install.log"

log() {
    echo "[truenas-proxmox-multipath] $*" | tee -a "$LOG_FILE"
}

case "$1" in
    remove|purge)
        if [ -f "$PLUGIN_DST" ]; then
            log "Removing ${PLUGIN_DST}"
            rm -f "$PLUGIN_DST"
        fi

        if [ -f "$JS_DST" ]; then
            log "Removing ${JS_DST}"
            rm -f "$JS_DST"
        fi

        if [ -f "$TPL" ] && grep -qF 'truenas-multipath.js' "$TPL" 2>/dev/null; then
            log "Removing <script> tag from ${TPL}"
            sed -i '/truenas-multipath\.js/d' "$TPL"
        fi

        if [ -f "$MULTIPATH_CONF" ] && grep -qF "$BLOCK_BEGIN" "$MULTIPATH_CONF"; then
            log "Removing TrueNAS stanza from ${MULTIPATH_CONF}"
            perl -i -0777 -pe \
                "s|\n?\Q${BLOCK_BEGIN}\E.*?\Q${BLOCK_END}\E\n?||s" \
                "$MULTIPATH_CONF"
        fi

        log "Restarting Proxmox VE services ..."
        if pvedaemon restart 2>/dev/null; then log "pvedaemon restarted"; fi
        if pveproxy  restart 2>/dev/null; then log "pveproxy restarted";  fi
        log "Done."
        ;;
    upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
        ;;
    *)
        echo "$0: called with unknown argument '$1'" >&2
        exit 0
        ;;
esac

exit 0
