#!/bin/bash

# Check if correct number of arguments are provided
if [ "$#" -ne 3 ]; then
    echo "Usage: ./script.sh [host_name] [redirect_target] [template_file]"
    read -p "Enter the template file path: " template_file
    read -p "Enter the host name: " host_name
    read -p "Enter the redirect target: " redirect_target
else
    # Assign command line arguments to variables
    template_file=$1
    host_name=$2
    redirect_target=$3
fi

# Check if template file exists
if [ ! -f "$template_file" ]; then
    echo "Template file not found: $template_file"
    exit 1
fi

# Read the template file
template=$(cat "$template_file")

# Use sed to replace placeholders with user input
config=$(echo "$template" | sed "s/HOST_NAME/$host_name/g; s/REDIRECT_TARGET/$redirect_target/g")

# Print the configuration
echo "$config"