#!/bin/bash

# Load environment variables
if [ -f .env ]; then
  export $(grep -v '^#' .env | xargs)
else
  echo "Error: .env file not found."
  exit 1
fi

if [ "$ENABLE_BACKUPS" != "TRUE" ]; then
  echo "Backups are disabled in .env. Exiting."
  exit 0
fi

PROJECT_DIR=$(pwd)
BACKUP_DIR="${PROJECT_DIR}/backups"
BACKUP_SCRIPT="${PROJECT_DIR}/run_backup.sh"

# Create backups directory
mkdir -p "$BACKUP_DIR"

# Create the actual backup script that cron will run
cat <<EOF > "$BACKUP_SCRIPT"
#!/bin/bash
# Auto-generated backup script
mkdir -p "$BACKUP_DIR"
cd "$PROJECT_DIR"

# Create new backup
FILENAME="mail_backup_\$(date +%F_%H-%M-%S).tar.gz"
tar -czvf "$BACKUP_DIR/\$FILENAME" ./data/ > /dev/null 2>&1

# Delete old backups based on retention days
find "$BACKUP_DIR" -type f -name "mail_backup_*.tar.gz" -mtime +$BACKUP_RETENTION_DAYS -exec rm {} \;
EOF

chmod +x "$BACKUP_SCRIPT"

# Remove existing cron job for this backup script to avoid duplicates
crontab -l | grep -v "$BACKUP_SCRIPT" | crontab -

# Add new cron job
(crontab -l 2>/dev/null; echo "$BACKUP_CRON $BACKUP_SCRIPT >> $PROJECT_DIR/backup.log 2>&1") | crontab -

echo "Backup automation configured successfully!"
echo "Schedule: $BACKUP_CRON"
echo "Retention: $BACKUP_RETENTION_DAYS days"
echo "Backups will be saved to: $BACKUP_DIR"