#!/bin/bash

# This script checks for the next free remote-admin pc and established a RDP session using xfreerdp to it.
# To use this script you need to create two files in your home directory
#
# .smbcredentials
# username=YOUR AD USERNAME
# password=YOUR AD PASSWORD
#
# .remote-admin
# USERNAME=administrator@zfd.forumzfd.de
# PASSWORD=AD ADMIN PASSWORD FROM BITWARDEN
#
# Make sure to proper chmod them (e.g. chmod 600)
#
# Add the following line to your /etc/fstab and edit YOUR_USERNAME
#
# //cluster-ho/Ampel /tmp/remote-ampel cifs credentials=/home/YOUR_USERNAME/.smbcredentials,user,noauto,workgroup=ZFD,dir_mode=0777,file_mode=0777,_netdev 0 0
#
# setuid might be necessary on /usr/sbin/mount.cifs. Set it as root with
#
# chmod u+s /usr/sbin/mount.cifs

AMPEL_MOUNT=/tmp/remote-ampel

if [ -f ~/.remote-admin ]; then
    source ~/.remote-admin
else
    echo ".remote-admin not found! Please create it!"
    exit 4
fi
if [ ! -f ~/.smbcredentials ]; then
    echo ".smbcredentials not found! Please create it!"
    exit 5
fi
# Check for xfreerdp
if [ ! -f /usr/bin/xfreerdp ]; then
    print "xfreerdp not found. Make sure it is installed"
    exit 1
else # check for the mount point
    mkdir -p $AMPEL_MOUNT
    if grep -qs $AMPEL_MOUNT /proc/mounts; then
        echo "$AMPEL_MOUNT already mounted."
    else
        echo "Trying to mount $AMPEL_MOUNT"
        mount $AMPEL_MOUNT
        if [ $? -eq 0 ]; then
            echo "Mount successful."
        else
            echo "Mount failed. Check share"
            exit 2
        fi
    fi
fi
sleep 2
for i in $(ls $AMPEL_MOUNT)
do
    if [[ $i == *"FREE"* ]]; then
        RDP=$(echo $i | cut -f1,2 -d'-')
        echo "$RDP is free :)"
        xfreerdp /u:$USERNAME /p:$PASSWORD /v:$RDP.zfd.forumzfd.de /dynamic-resolution
        umount $AMPEL_MOUNT
        echo 'Connection closed. Bye'
        exit 0
    fi
done
echo 'No Remote-Admin is free. :( Try again later.'
umount $AMPEL_MOUNT
exit 0