#!/usr/bin/env bash
# anwarpy.ai — Postgres backup (L-06)
#
# Run ON THE VPS (needs the `proxy`/compose network up):
#   ./scripts/backup-db.sh
#
# Cron (nightly 03:15, keep dir writable):
#   15 3 * * * cd /root/anwarpi && ./scripts/backup-db.sh >> backups/backup.log 2>&1
#
# Restore a dump into the running db container:
#   gunzip -c backups/anwarpi-YYYYMMDD-HHMMSS.sql.gz | \
#     docker compose -f docker-compose.vps.yml exec -T db psql -U anwarpi anwarpi
#
# Restore-rehearsal (verify a backup is loadable BEFORE you need it):
#   gunzip -c backups/<file>.sql.gz | \
#     docker compose -f docker-compose.vps.yml exec -T db psql -U anwarpi -c "CREATE DATABASE anwarpi_restore_test;"
#   gunzip -c backups/<file>.sql.gz | \
#     docker compose -f docker-compose.vps.yml exec -T db psql -U anwarpi -d anwarpi_restore_test -q
#   docker compose -f docker-compose.vps.yml exec -T db psql -U anwarpi -d anwarpi_restore_test -tAc \
#     "SELECT (SELECT count(*) FROM posts) AS posts, (SELECT count(*) FROM users) AS users;"
#   docker compose -f docker-compose.vps.yml exec -T db psql -U anwarpi -c "DROP DATABASE anwarpi_restore_test;"
set -euo pipefail
cd "$(dirname "$0")/.."

mkdir -p backups
STAMP=$(date +%Y%m%d-%H%M%S)
OUT="backups/anwarpi-${STAMP}.sql.gz"

docker compose -f docker-compose.vps.yml exec -T db pg_dump -U anwarpi anwarpi | gzip > "$OUT"
echo "wrote $OUT ($(du -h "$OUT" | cut -f1))"