#!/bin/sh
# Trouve-KA — snapshot quotidien OpenSearch (node search M2M32b)
# Author: Simon-Pierre Boucher
# Contact: contact@spboucher.ai
#
# Snapshots natifs OpenSearch (incrémentaux entre eux) dans un dossier hôte
# monté dans le container (path.repo=/mnt/snapshots). Rotation 7 jours.
# Restauration : POST _snapshot/trouveka-fs/<snap>/_restore
#   (index fermé ou renommé via rename_pattern au besoin).

PATH="$HOME/.local/bin:/opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin"
export PATH
LOG="$HOME/trouveka-backups/backup.log"
STAMP=$(date '+%Y%m%d')
OS=http://localhost:9200

mkdir -p "$HOME/trouveka-backups"
log() { echo "$(date '+%F %T') [os] $*" >> "$LOG"; }

# Dépôt de snapshots (idempotent)
curl -s -m 20 -X PUT "$OS/_snapshot/trouveka-fs" -H 'Content-Type: application/json' \
  -d '{"type":"fs","settings":{"location":"/mnt/snapshots","compress":true}}' >/dev/null 2>&1

RES=$(curl -s -m 590 -X PUT "$OS/_snapshot/trouveka-fs/daily-$STAMP?wait_for_completion=true" \
  -H 'Content-Type: application/json' \
  -d '{"indices":"trouveka-docs-v2","include_global_state":false}')
case "$RES" in
  *'"state":"SUCCESS"'*) log "snapshot daily-$STAMP OK" ;;
  *already*exists*) log "snapshot daily-$STAMP déjà présent" ;;
  *) log "ÉCHEC snapshot : $(echo "$RES" | head -c 200)"; exit 1 ;;
esac

# Rotation : supprimer les snapshots > 7 jours (via l'API, jamais le filesystem)
CUTOFF=$(date -v-7d '+%Y%m%d' 2>/dev/null || date -d '7 days ago' '+%Y%m%d')
for snap in $(curl -s -m 30 "$OS/_snapshot/trouveka-fs/_all" | grep -o '"snapshot":"daily-[0-9]*"' | grep -o 'daily-[0-9]*'); do
  d=${snap#daily-}
  if [ "$d" -lt "$CUTOFF" ] 2>/dev/null; then
    curl -s -m 60 -X DELETE "$OS/_snapshot/trouveka-fs/$snap" >/dev/null
    log "rotation : $snap supprimé"
  fi
done
exit 0