#!/usr/bin/env bash
# ────────────────────────────────────────────────────────────────────────────
# Payload CMS Database Backup
# Creates a timestamped pg_dump of the Payload Postgres database.
# Usage: npm run backup:db
# ────────────────────────────────────────────────────────────────────────────
set -euo pipefail

# Load environment variables
if [ -f .env ]; then
  set -a; source .env; set +a
fi

# Fallback for local development if not in .env
DB_NAME="${POSTGRES_DB:-payload}"
DB_USER="${POSTGRES_USER:-postgres}"
# For production, we need the container name. 
# We'll use the PROJECT_NAME to find it if possible, otherwise use a default.
PROJECT_NAME="${PROJECT_NAME:-mb-grid-solutions-production}"
DB_CONTAINER="${DB_CONTAINER:-${PROJECT_NAME}-mb-grid-db-1}"
BACKUP_DIR="./backups"
TIMESTAMP=$(date +"%Y%m%d_%H%M%S")
BACKUP_FILE="${BACKUP_DIR}/payload_${TIMESTAMP}.sql.gz"

# Ensure backup directory exists
mkdir -p "$BACKUP_DIR"

# Check if container is running
if ! docker ps --format '{{.Names}}' | grep -q "$DB_CONTAINER"; then
  echo "❌ Database container '$DB_CONTAINER' is not running."
  echo "   Check your docker-compose status."
  exit 1
fi

echo "📦 Backing up Payload database..."
echo "   Container: $DB_CONTAINER"
echo "   Database:  $DB_NAME"
echo "   Output:    $BACKUP_FILE"

# Run pg_dump inside the container and compress
# We use directus as user for now if we haven't fully switched to postgres user in all environments
# But the script should be consistent with the environment.
docker exec "$DB_CONTAINER" pg_dump -U "$DB_USER" -d "$DB_NAME" --clean --if-exists | gzip > "$BACKUP_FILE"

# Show result
SIZE=$(du -h "$BACKUP_FILE" | cut -f1)
echo ""
echo "✅ Backup complete: $BACKUP_FILE ($SIZE)"
echo ""

# Show existing backups
echo "📋 Available backups:"
ls -lh "$BACKUP_DIR"/*.sql.gz 2>/dev/null | awk '{print "   " $NF " (" $5 ")"}'