#!/bin/bash

# Atlas CMMS Database Backup Script
# This script creates a backup of the Atlas CMMS PostgreSQL database

# Configuration
CONTAINER_NAME="atlas_db"
DB_NAME="atlas"
DB_USER="rootUser"
BACKUP_DIR="./backups"
TIMESTAMP=$(date +"%Y%m%d_%H%M%S")
BACKUP_FILE="atlas_backup_${TIMESTAMP}.sql"

# Create backup directory if it doesn't exist
mkdir -p "${BACKUP_DIR}"

echo "Starting Atlas CMMS database backup..."
echo "Container: ${CONTAINER_NAME}"
echo "Database: ${DB_NAME}"
echo "Backup file: ${BACKUP_DIR}/${BACKUP_FILE}"

# Check if container is running
if ! docker ps | grep -q "${CONTAINER_NAME}"; then
    echo "Error: PostgreSQL container '${CONTAINER_NAME}' is not running"
    exit 1
fi

# Create database backup
docker exec "${CONTAINER_NAME}" pg_dump \
    -U "${DB_USER}" \
    -d "${DB_NAME}" \
    --no-password \
    --verbose \
    --clean \
    --if-exists \
    --create > "${BACKUP_DIR}/${BACKUP_FILE}"

# Check if backup was successful
if [ $? -eq 0 ]; then
    echo "Backup completed successfully: ${BACKUP_DIR}/${BACKUP_FILE}"
    
    # Compress the backup file
    gzip "${BACKUP_DIR}/${BACKUP_FILE}"
    echo "Backup compressed: ${BACKUP_DIR}/${BACKUP_FILE}.gz"
    
    # Optional: Remove backups older than 30 days
    find "${BACKUP_DIR}" -name "atlas_backup_*.sql.gz" -mtime +30 -delete
    echo "Old backups (>30 days) cleaned up"
else
    echo "Error: Backup failed"
    rm -f "${BACKUP_DIR}/${BACKUP_FILE}"
    exit 1
fi

echo "Backup process completed"