#!/usr/bin/env bash
set -o errexit
set -o nounset
set -o pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=00_env.sh
source "$SCRIPT_DIR/00_env.sh"

parse_common_args "$@"
require_inputs sg dg vol mount

missing=0
for cmd in hagrp vxdisk vxdg vxprint df findmnt; do
  require_cmd "$cmd" || missing=1
done

if (( missing != 0 )); then
  exit 2
fi

status=0
ok "Post-check started"
log "INFO" "log file: $LOG_FILE"

group_state="$(hagrp -state "$SERVICE_GROUP" 2>/dev/null || true)"
printf '%s\n' "$group_state" | tee -a "$LOG_FILE"
if printf '%s\n' "$group_state" | grep -qi "ONLINE"; then
  ok "service group is online"
else
  critical "service group is not online"
  status=1
fi

freeze_display="$(hagrp -display "$SERVICE_GROUP" 2>/dev/null | grep -i "Frozen" || true)"
printf '%s\n' "$freeze_display" | tee -a "$LOG_FILE"
if printf '%s\n' "$freeze_display" | grep -Eqi "(1|true|yes|persistent)"; then
  ok "service group still appears frozen before unfreeze"
else
  warning "unable to confirm service group freeze state; review before unfreezing"
fi

if vxdg list "$DISKGROUP" >/dev/null 2>&1; then
  ok "diskgroup imported and visible: $DISKGROUP"
else
  critical "diskgroup not visible: $DISKGROUP"
  status=1
fi

volume_line="$(vxprint -g "$DISKGROUP" -v "$VOLUME" 2>/dev/null || true)"
printf '%s\n' "$volume_line" | tee -a "$LOG_FILE"
if printf '%s\n' "$volume_line" | grep -Eqi "(ENABLED|ACTIVE|started|fsgen)"; then
  ok "volume appears enabled or active"
else
  critical "unable to confirm volume is enabled or active"
  status=1
fi

if findmnt --target "$MOUNTPOINT" >/dev/null 2>&1; then
  ok "mountpoint is mounted: $MOUNTPOINT"
else
  critical "mountpoint is not mounted: $MOUNTPOINT"
  status=1
fi

capture_cmd "Filesystem usage after expansion" df -h "$MOUNTPOINT" || status=1
capture_cmd "VxVM layout after expansion" vxprint -g "$DISKGROUP" -ht || status=1
capture_cmd "VxVM disk list after expansion" vxdisk list || status=1

if has_cmd journalctl; then
  capture_cmd "Recent kernel journal messages" journalctl -k -n 50 || warning "journalctl check failed; review permissions or system logging"
else
  warning "journalctl not found; skipping kernel journal check"
fi

if has_cmd dmesg; then
  log "INFO" "Recent dmesg messages"
  log "INFO" "command: dmesg -T | tail -50"
  if dmesg -T 2>&1 | tail -50 | tee -a "$LOG_FILE"; then
    ok "captured recent dmesg messages"
  else
    warning "dmesg check failed; review permissions or kernel logging"
  fi
else
  warning "dmesg not found; skipping dmesg check"
fi

if (( status == 0 )); then
  ok "post-check completed successfully; compare df output with precheck baseline for expected size increase"
else
  critical "post-check found one or more issues"
fi

exit "$status"