ao-mud/spells/menu/network-menu

configure_dhcp() {
    # Ask for confirmation before proceeding
    if ! ask_Yn "The spell of Dynamic Host Configuration Protocol will automatically configure your network settings based on the DHCP server. Would you like to proceed?"; then
        return 1
    fi

    # Check if DHCP is already in use
    if ip addr show | grep "dhclient" >/dev/null 2>&1 ; then
        printf "DHCP is already in use.\n"
        return 0
    fi

    # Backup the current network configuration
    backup_file "/etc/network/interfaces"

    # Configure the system to use DHCP
    echo "auto lo" > /etc/network/interfaces
    echo "iface lo inet loopback" >> /etc/network/interfaces
    echo "auto eth0" >> /etc/network/interfaces
    echo "iface eth0 inet dhcp" >> /etc/network/interfaces
    service networking restart
    printf "DHCP has been configured successfully.\n"
}

configure_static_ip() {
    # Ask the user for the IP address, netmask, gateway, and DNS server
    read -p "Enter the desired IP address: " ip_address
    read -p "Enter the netmask (in CIDR notation, e.g. 24): " netmask
    read -p "Enter the gateway IP: " gateway
    read -p "Enter the DNS server IP: " dns_server

    # Check if the static IP address is already configured
    if ip addr show | grep -q "$ip_address/$netmask"; then
        echo "The static IP address $ip_address/$netmask is already configured. Updating it."
        # Delete the existing configuration
        sudo ip addr del "$ip_address/$netmask" dev eth0
    fi

    # Add the new static IP address configuration
    sudo ip addr add "$ip_address/$netmask" dev eth0

    # Set the gateway
    sudo ip route add default via "$gateway"

    # Set the DNS server
    sudo sed -i "s/^nameserver.*/nameserver $dns_server/" /etc/resolv.conf

    echo "Static IP address configuration has been set to $ip_address/$netmask with gateway $gateway and DNS server $dns_server."
}

configure_dhcp() {
    # Ask for confirmation before proceeding
    ask_Yn "The spell of Dynamic Host Configuration Protocol will automatically configure your network settings based on the DHCP server. Would you like to proceed?"
    if [ $? -ne 0 ]; then
        return 1
    fi

    # Check if DHCP is already in use
    ip addr show | grep "dhclient" &>/dev/null
    if [ $? -eq 0 ]; then
        echo -e "${RED}DHCP is already in use.${RESET}"
        return 0
    fi

    # Backup the current network configuration
    backup_file "/etc/network/interfaces"

    # Configure the system to use DHCP
    echo "auto lo" > /etc/network/interfaces
    echo "iface lo inet loopback" >> /etc/network/interfaces
    echo "auto eth0" >> /etc/network/interfaces
    echo "iface eth0 inet dhcp" >> /etc/network/interfaces
    service networking restart
    echo -e "${GREEN}DHCP has been configured successfully.${RESET}"
}

display_menu() {
  # Get the dimensions of the terminal window
  window_width=$(tput cols)
  window_height=$(tput lines)
  
  # Calculate the number of rows that the menu will occupy
  num_rows=$(( ${#items[@]})) 
  
  # Calculate the position of the menu
  menu_x=$((0))
  menu_y=$(row)

  # Clear the area of the screen where the menu will be drawn
  clear_area $menu_x $menu_y $num_rows $window_width
  
  # Print the menu title
  echo -en "\033[$menu_y;$((menu_x + (window_width / 2 - ${#title} / 2)))H$title"
  
  # Print the items and commands
  for i in "${!items[@]}"; do
    echo -en "\033[$((menu_y + i + 1));$((menu_x + 2))H ${items[$i]}"
  done

  # Highlight the selected item
  echo -en "\033[$((menu_y + selected + 1));$((menu_x + 2))H ${CYAN}${items[$selected]}${RESET}"
  
  # Move the cursor to the selected item
  echo -en "\033[$((menu_y + selected + 1));$((menu_x + 2))H"
}

display_menu() {
    description="Please choose an option to configure your network settings"
    options=("Configure static IP" "Configure DHCP" "Reset to DHCP" "Exit")
    commands=("configure_static_ip" "configure_dhcp" "reset_dhcp" "exit")
    menu "$description" "${options[@]}" "${commands[@]}"
}