#!/bin/bash

# Database Backup Script
# This script creates a PostgreSQL dump and uploads it to S3
# In production, this would include:
# - Compression of backup files
# - Encryption for sensitive data
# - Verification of backup integrity
# - Cleanup of old backups based on retention policy
# - Error handling and retry logic

set -e

TIMESTAMP=$(date +%Y%m%d_%H%M%S)
BACKUP_FILE="backup_${TIMESTAMP}.sql"

echo "Starting database backup at $(date)"

# Create PostgreSQL dump
# Replace with actual pg_dump command in production:
# pg_dump $DATABASE_URL > $BACKUP_FILE

echo "Database dump created: $BACKUP_FILE"

# Upload to S3
# Replace with actual aws s3 cp command in production:
# aws s3 cp $BACKUP_FILE s3://$BACKUP_S3_BUCKET/backups/$BACKUP_FILE

echo "Backup uploaded to S3: s3://$BACKUP_S3_BUCKET/backups/$BACKUP_FILE"

# Cleanup local backup file
# rm $BACKUP_FILE

# Optional: Remove old backups based on retention policy
# if [ -n "$BACKUP_RETENTION_DAYS" ]; then
#   CUTOFF_DATE=$(date -d "$BACKUP_RETENTION_DAYS days ago" +%Y%m%d)
#   aws s3 ls s3://$BACKUP_S3_BUCKET/backups/ | while read -r line; do
#     BACKUP_DATE=$(echo $line | awk '{print $4}' | sed 's/backup_\([0-9]*\)_.*/\1/')
#     if [ "$BACKUP_DATE" -lt "$CUTOFF_DATE" ]; then
#       BACKUP_NAME=$(echo $line | awk '{print $4}')
#       aws s3 rm s3://$BACKUP_S3_BUCKET/backups/$BACKUP_NAME
#       echo "Removed old backup: $BACKUP_NAME"
#     fi
#   done
# fi

echo "Backup completed successfully at $(date)"
