#!/usr/bin/env bash

if [ "$1" == "-h" ]; then
    echo "Usage: coolwsd-generate-proof-key [-h] [CONFIGDIR]"
    echo "CONFIGDIR defaults to /etc/coolwsd"
    exit 0
fi

if [ "$1" ]; then
    CONFIGDIR="$1"
else
    CONFIGDIR="/etc/coolwsd"
fi

SUDO=''
if [ ! -w "$CONFIGDIR" ]; then
    if (( $EUID != 0 )); then
        if hash sudo 2>/dev/null; then
            SUDO='sudo'
        else
            echo "Run the script as root."
            exit 1
        fi
    fi
fi

if [ -f $CONFIGDIR/proof_key ]; then
    echo "$CONFIGDIR/proof_key exists already."
    exit 0
fi

if hash ssh-keygen 2>/dev/null; then
    $SUDO ssh-keygen -t rsa -N "" -m PEM -f $CONFIGDIR/proof_key
    if [ $? -ne 0 ] ; then
        exit $?
    fi
    if id -u cool >/dev/null 2>&1; then
        $SUDO chown cool: $CONFIGDIR/proof_key
    else
        echo "User cool does not exist. Please reinstall coolwsd package, or in case of manual installation from source, create the cool user manually."
    fi
else
    echo "ssh-keygen command not found. Please install openssh client tools."
    exit 127
fi