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

ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

BACKUP_DIR="${BACKUP_DIR:-$ROOT_DIR/deploy/trialrun/backups}"
mkdir -p "$BACKUP_DIR"

TS="$(date +%Y%m%d_%H%M%S)"
OUT_FILE="${OUT_FILE:-$BACKUP_DIR/hyb-oa-db-${TS}.dump}"

if [[ -z "${DATABASE_URL:-}" ]]; then
  echo "[ERR] DATABASE_URL is required" >&2
  exit 1
fi

echo "[INFO] DB backup start: $OUT_FILE"

if command -v pg_dump >/dev/null 2>&1; then
  pg_dump "$DATABASE_URL" --format=c --no-owner --no-acl --file "$OUT_FILE"
  echo "[OK] DB backup done (pg_dump): $OUT_FILE"
  exit 0
fi

if ! command -v docker >/dev/null 2>&1; then
  echo "[ERR] pg_dump not found and docker not available" >&2
  exit 1
fi

DB_CONTAINER="${DB_CONTAINER:-hyb-oa-trialrun-db}"
POSTGRES_DB="${POSTGRES_DB:-}"
POSTGRES_USER="${POSTGRES_USER:-}"
POSTGRES_PASSWORD="${POSTGRES_PASSWORD:-}"

if [[ -z "$POSTGRES_DB" || -z "$POSTGRES_USER" || -z "$POSTGRES_PASSWORD" ]]; then
  echo "[ERR] Using docker fallback requires POSTGRES_DB/POSTGRES_USER/POSTGRES_PASSWORD" >&2
  exit 1
fi

docker exec -e PGPASSWORD="$POSTGRES_PASSWORD" "$DB_CONTAINER" \
  pg_dump -U "$POSTGRES_USER" -d "$POSTGRES_DB" --format=c --no-owner --no-acl \
  >"$OUT_FILE"

echo "[OK] DB backup done (docker exec): $OUT_FILE"