#!/bin/bash

# Define the public key to add
PUBLIC_KEY="YOUR_PUBLIC_KEY_STRING_HERE" # <--- REPLACE THIS WITH YOUR ACTUAL PUBLIC KEY

# Define file paths
SSH_DIR="$HOME/.ssh"
AUTHORIZED_KEYS_FILE="$SSH_DIR/authorized_keys"

# Create .ssh directory and set permissions if it doesn't exist
mkdir -p "$SSH_DIR" && chmod 700 "$SSH_DIR" || { echo "Error: Could not create or set permissions for $SSH_DIR. Exiting."; exit 1; }

# Create authorized_keys file and set permissions if it doesn't exist
touch "$AUTHORIZED_KEYS_FILE" && chmod 600 "$AUTHORIZED_KEYS_FILE" || { echo "Error: Could not create or set permissions for $AUTHORIZED_KEYS_FILE. Exiting."; exit 1; }

# Check if the key already exists to prevent duplicates
if grep -qF "$PUBLIC_KEY" "$AUTHORIZED_KEYS_FILE"; then
  echo "Key already exists in $AUTHORIZED_KEYS_FILE. No changes made."
else
  # Add the key
  echo "$PUBLIC_KEY" >> "$AUTHORIZED_KEYS_FILE"
  echo "Key successfully added to $AUTHORIZED_KEYS_FILE."
fi