#!/bin/bash
set -euo pipefail

BACKUP_DIR="/opt/lab-leopost-full-prod/backups"
FNAME="leopost_$(date +%Y%m%d_%H%M).sql.gz"
GDRIVE_DIR="gdrive:Backups/Leopost"
LOG="$BACKUP_DIR/backup.log"
RETENTION_DAYS=7

log() { echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a "$LOG"; }

log "--- Avvio backup $FNAME ---"

# 1. pg_dump → gzip
docker exec prod-leopost-postgres pg_dump -U leopost leopost | gzip > "$BACKUP_DIR/$FNAME"
SIZE=$(du -sh "$BACKUP_DIR/$FNAME" | cut -f1)
log "Dump creato: $FNAME ($SIZE)"

# 2. Upload su Google Drive
rclone copy "$BACKUP_DIR/$FNAME" "$GDRIVE_DIR" --log-level ERROR 2>>"$LOG"
log "Upload Drive completato: $GDRIVE_DIR/$FNAME"

# 3. Cleanup locale > 7 giorni
DELETED=$(find "$BACKUP_DIR" -name 'leopost_*.sql.gz' -mtime +$RETENTION_DAYS -print -delete | wc -l)
log "Cleanup: $DELETED file rimossi (retention ${RETENTION_DAYS}gg)"

log "--- Backup completato con successo ---"