#!/bin/bash

# VARIABLES
script_version="1.3"
ssh_keys_dir="$HOME/.ssh"
netBaseDir="https://megamov.fr/ssh/pub"

#####################################

mega_checkCommands()
{
  if ! [ -x "$(command -v wget)" ]; then
        show "[x] Error: Please install wget"
        exit 1
  fi
}

mega_checkCommands

######################################

##### ALL FUNCTIONS USED TO RUN THIS SCRIPT ######

# Show the date with style
mega_showDate()
{
  printf "| %-40s  |\n" "`date`"
  echo "| "
}

# Show text with style
mega_show()
{
  printf "|`tput bold` %-40s `tput sgr0` |\n" "$@"
}

# Show text with error color
mega_showerror()
{
  printf "|`tput bold``tput setf 4` %-40s `tput sgr0` |\n" "$@"
}

# Show text with success color
mega_showsuccess()
{
  printf "|`tput bold``tput setf 2` %-40s `tput sgr0` |\n" "$@"
}

# Show the banner
mega_banner()
{
  echo "+-------------------------------------------+"
}

# Check network by asking script
mega_checkNet()
{
  status=$(wget -qO- conntest.megamov.fr)
  if [ "$status" = "ok" ] ; then
	echo 0
	return 0
  fi
  echo 1
  return 1
}

# CREATE .SSH DIR IF NOT EXIST
mega_sshDir()
{
  if [[ ! -e $ssh_keys_dir ]]; then
	if mkdir -p $ssh_keys_dir ; then
		echo 0
		return 0
	else
		echo 1
		return 1
	fi
  fi
  echo 0
  return 0
}

# CHECK IF THE KEY EXIST
mega_checkPubKey()
{
  wget -qO- $keyURL
  if [ $? = 0 ] ; then
        echo 0
        return 0
  fi
  echo 1
  return 1
}

# ADD public key in .authorized_key
mega_addPubKey()
{
  echo
  echo "#Nicolas.P @MeGaMoV SSH Key $keyVersion"
  ssh_key=$(wget -qO- $keyURL)
  echo $ssh_key
} >> $ssh_keys_dir/authorized_keys

################################################################################
##########                      MAIN SCRIPT                           ##########
################################################################################

mega_banner
mega_show
mega_show "    Adding SSH Key of Nicolas @MeGaMoV"
mega_show "                 v$script_version"
mega_show

keyVersion=$1
keyURL="$netBaseDir$keyVersion"

# Checking network
res=$(mega_checkNet)
if [ "$res" = 1 ]; then
    mega_showerror "[+] Err: Can't access megamov's server."
    mega_show
    mega_banner
    exit 1
fi

# Create .ssh DIR
res=$(mega_sshDir)
if [ "$res" = 1 ]; then
    mega_showerror "[+] Err: Can't create ssh folder"
    mega_showerror "         $ssh_keys_dir"
    mega_show
    mega_banner
    exit 1
fi

# Check if the key exist in server
res=$(mega_checkPubKey)
if [ "$res" = 1 ]; then
    mega_showerror "[+] Error: Unable do get the public key"
    mega_show
    mega_showerror "Please : Check if the NAME you entered"
    mega_showerror "            is a valid MeGaMoV Key"
    mega_show
    mega_showerror "NOTE : Leave empty if you don't know"
    mega_show
    mega_banner
    exit 1
fi

# Adding the public key
mega_addPubKey

# Key the IP
IP=$(wget -qO- ip.megamov.fr)

mega_showsuccess "         SSH Public key added !"
mega_showsuccess "         Access available from :"
mega_show
mega_showsuccess "$USER@$IP"
mega_banner
exit 0