#!/bin/sh
# Nightly backup: database dump + uploaded files (songs, covers, photos). Keeps 14 days.
# Copy the backups folder off the server too (another machine, or cloud storage).
#
# Cron (as the user that runs docker):
#   30 2 * * * sh /path/to/server/backup.sh >> $HOME/nk-backups/backup.log 2>&1
set -eu

PROJECT="${1:-$HOME/nk-backend/supabase-project}"
DEST="${2:-$HOME/nk-backups}"
STAMP="$(date +%Y%m%d-%H%M)"
mkdir -p "$DEST"
cd "$PROJECT"

PGPASSWORD="$(grep -E '^POSTGRES_PASSWORD=' .env | cut -d= -f2-)"

docker compose exec -T -e PGPASSWORD="$PGPASSWORD" db \
  pg_dump -h localhost -U postgres -d postgres -Fc > "$DEST/db-$STAMP.dump"

tar -czf "$DEST/storage-$STAMP.tar.gz" -C volumes storage

find "$DEST" -name 'db-*.dump' -mtime +14 -delete
find "$DEST" -name 'storage-*.tar.gz' -mtime +14 -delete

echo "$(date -Is) backup ok: db-$STAMP.dump storage-$STAMP.tar.gz"