#!/usr/bin/env bash
set -euo pipefail

if [[ -z "${DATABASE_URL:-}" && -z "${BACKUP_DATABASE_URL:-}" ]]; then
  echo "DATABASE_URL or BACKUP_DATABASE_URL is required."
  exit 1
fi

ENV_FILE="${ENV_FILE:-./.env}"
if [[ -f "$ENV_FILE" ]]; then
  set -a
  # shellcheck source=/dev/null
  . "$ENV_FILE"
  set +a
fi

OUT_DIR="${BACKUP_DIR:-./backups}"
mkdir -p "$OUT_DIR"

STAMP="$(date +%F_%H%M%S)"
OUT_FILE="${OUT_DIR}/skymoney_${STAMP}.dump"
OUT_BASENAME="$(basename "$OUT_FILE")"
OUT_DIR_ABS="$(cd "$OUT_DIR" && pwd)"

pg_dump "${BACKUP_DATABASE_URL:-$DATABASE_URL}" -Fc -f "$OUT_FILE"
(cd "$OUT_DIR_ABS" && sha256sum "$OUT_BASENAME" > "${OUT_BASENAME}.sha256")

echo "Backup written to: $OUT_FILE"
echo "Checksum written to: ${OUT_FILE}.sha256"