#!/usr/bin/env bash
# Backup diario FRASA — cron: 17 2 * * * /opt/frasa-ecosystem/scripts/backup.sh
set -euo pipefail

BACKUP_DIR="/backups"
FECHA=$(date +%Y%m%d)
RETENCION_DIAS=30
mkdir -p "$BACKUP_DIR"

cd "$(dirname "$0")/.."

# 1. Base de datos SQLite del API (mientras no se migre a Postgres)
docker compose exec -T api sh -c 'cat /data/dev.db' > "$BACKUP_DIR/frasa_db_$FECHA.sqlite" || true

# 2. Postgres (cuando el API migre; hoy falla en silencio si no hay datos)
docker compose exec -T postgres pg_dump -U "${POSTGRES_USER:-frasa_user}" "${POSTGRES_DB:-frasa_db}" \
  > "$BACKUP_DIR/frasa_pg_$FECHA.sql" 2>/dev/null || rm -f "$BACKUP_DIR/frasa_pg_$FECHA.sql"

# 3. Expedientes subidos (INE, firmas, comprobantes)
docker compose exec -T api sh -c 'cd /data && tar czf - uploads' > "$BACKUP_DIR/uploads_$FECHA.tar.gz" || true

# 4. Retención
find "$BACKUP_DIR" -name "frasa_*" -mtime +$RETENCION_DIAS -delete
find "$BACKUP_DIR" -name "uploads_*" -mtime +$RETENCION_DIAS -delete

echo "[$(date -Is)] backup completo en $BACKUP_DIR"