#!/bin/bash

#################################
#                              ##
#  mediacenter control script  ##
#                              ##
#################################

#  ****  config section  ****
author="david@socialnerds.org"
version="0.1_alpha"

hwaddr="00:10:c6:cd:00:d4"	#mc mac address
ipaddr="10.1.1.7"		#mc ip address/hostname
wolserv="10.1.1.4"              #remote wakeonlan host (connects via ssh)
remoteuser="media"              #mc user
mediapath="/home/media/Videos"  #remote basepath for mediafiles


# check for dependencies
#apt-get install wakeonlan dialog

#  ****  bashtrap  ****
# bash trap function is executed when CTRL-C is pressed
bashtrap()
{
    log 3 "bashtrap - triggered"
    clear
    echo "CTRL+C detected.. exiting!"
    exit 1
}


navigation()
{
    dialog --backtitle "Media Center Control" --title "Navigation" --no-cancel --menu "" 13 55 7 start "start mediacenter" stop "shutdown mediacenter" vnc "open vnc session" play "play mediafile" kill "kill mediaplaybak" volume "control volume" quit "leave media control" 2> /tmp/dialog
    navresult=$(cat /tmp/dialog)
    rm /tmp/dialog

    if [ $navresult = start ]; then
        startmc
    elif [ $navresult = stop ]; then
        stopmc
    elif [ $navresult = vnc ]; then
        vncconnect
    elif [ $navresult = play ]; then
        playmedia
    elif [ $navresult = kill ]; then
        killmedia
    elif [ $navresult = volume ]; then
        volumecontrol
    elif [ $navresult = quit ]; then
        exit 0
    fi
}

isitup()
{
    # is mediacenter up?
    clear
    echo "checking if mediacenter is up..."
    ping -w 1 $ipaddr &> /dev/null
    local pingresult=$?
    return $pingresult
}

startmc()
{
    # check if mediacenter is up
    isitup
    if [ $? = 0 ]; then
        dialog --backtitle "Media Center Control" --title "Info" --msgbox "\n\n  mediacenter@$ipaddr is already up and running" 9 55
    else
        ssh $wolserv wakeonlan $hwaddr &> /dev/null
        dialog --backtitle "Media Center Control" --title "Info" --msgbox "\n\n  magic package sent to mediacenter@$ipaddr" 9 55
    fi
}

stopmc()
{
    # is mediacenter up?
    isitup
    if [ $? = 0 ]; then
        ssh $remoteuser@$ipaddr "sudo shutdown -h now"
        dialog --backtitle "Media Center Control" --title "Info" --msgbox "\n\n  mediacenter@$ipaddr will be shutdown" 9 55
    else
        dialog --backtitle "Media Center Control" --title "Info" --msgbox "\n\n  mediacenter@$ipaddr unreachable" 9 55

    fi    
    exit 0
}

vncconnect()
{
    # check if mediacenter is up
    isitup
    if [ $? = 0 ]; then
        vncviewer $ipaddr &> /dev/null &
    else
        dialog --backtitle "Media Center Control" --title "Info" --msgbox "\n\n  mediacenter@$ipaddr unreachable" 9 55
    fi

}

playmedia()
{
file="/home/media/Videos/series/the_big_bang_theory/season_4/BBTIV.14.avi"
    # check if mediacenter is up
    isitup
    if [ $? = 0 ]; then
        # selecting file
        ssh -t $remoteuser@$ipaddr "dialog --fselect $mediapath 7 70 2> /tmp/dialog"
        local file=$(ssh $remoteuser@$ipaddr "cat /tmp/dialog && rm /tmp/dialog")
        ssh $remoteuser@$ipaddr "export DISPLAY=:0.0 && vlc --no-video-title-show -f $file &> /dev/null" &
    else
        dialog --backtitle "Media Center Control" --title "Info" --msgbox "\n\n  mediacenter@$ipaddr unreachable" 9 55
    fi
}

killmedia()
{
    # check if mediacenter is up
    isitup
    if [ $? = 0 ]; then
        ssh $remoteuser@$ipaddr "killall vlc && killall rhythmbox"
    else
        dialog --backtitle "Media Center Control" --title "Info" --msgbox "\n\n  mediacenter@$ipaddr unreachable" 9 55
    fi
}

#  ****  volume control  ****
volumecontrol()
{
    # check if mediacenter is up
    isitup
    if [ $? = 0 ]; then
        # open up remote alsamixer
        ssh -t $remoteuser@$ipaddr alsamixer
    else
        dialog --backtitle "Media Center Control" --title "Info" --msgbox "\n\n  mediacenter@$ipaddr unreachable" 9 55
    fi
}

#  ******  start of actual script  ******

#  ****  bash trap initialisation  ****
trap bashtrap INT

#  ****  run navigation  ****
# endless loop
while [ 1 ]; do
    navigation
done

exit 0
# end of script