#!/bin/bash
PATH=/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/bin:/sbin
chkans=0
SERVERIP=$(ip a s eth0 | awk '/inet / {print$2}' | cut -d/ -f1)
RTFILE=/usr/local/bin/rt
home="/home/$SUDO_USER"

installed() {
hash $1 2>/dev/null
}

get_scripts() {
local script_name=$1
local script_dest=$2
local no_err=1
local attempts=0
until [ $no_err = 0 ]
  do
    rm -f $script_name
    wget --no-check-certificate https://raw.githubusercontent.com/arakasi72/rtinst/master/$script_name
    no_err=$?
    attempts=$(( $attempts + 1 ))
    if [ $attempts = 20 ]
      then
        echo "There is a problem downloading the scripts. Please check your network or there may be an issue with the github website"
        echo "If the Github website is down, you can try again later"
        exit 1
    fi
  done

if ! [ -z "$script_dest" ]
  then
    mv -f $script_name $script_dest
fi
}

if [ "$LOGNAME" != "root" && ! -z "$SUDO_USER" ]
  then
    echo "Must be run from your primary user, with sudo"
    exit 1
fi

ask_version() {
    while true
      do
      echo "Select version to upgrade/downgrade to"
      echo "1. libtorrent 0.13.2/rtorrent 0.9.2"
      echo "2. libtorrent 0.13.3/rtorrent 0.9.3"
      echo "3. libtorrent 0.13.4/rtorrent 0.9.4"
      echo "4. Quit"
      read -p "Select an option " answer
      case $answer in [1] ) libvers="libtorrent-0.13.2" && rtvers="rtorrent-0.9.2" && return 0 ;;
                      [2] ) libvers="libtorrent-0.13.3" && rtvers="rtorrent-0.9.3" && return 0 ;;
                      [3] ) libvers="libtorrent-0.13.4" && rtvers="rtorrent-0.9.4" && return 0 ;;
                      [4] ) exit ;;
                          * ) echo "Enter 1-4";;
      esac
    done
}

confirm_answer() {
while true
      do
      read -p "Sure you wish to install $libvers/$rtvers? " answer
      case $answer in [Yy]* ) chkans=1 && return 0 ;;
                      [Nn]* ) return 0 ;;
                          * ) echo "Enter y or n";;
      esac
    done

}

if ( installed rtorrent )
  then
    echo "rtorrent detected"
    echo
  else
    echo "rtorrent NOT installed"
    echo "This script is for upgrading/downgrading only, not for initial install"
    exit 1
fi

while [ $chkans = 0 ]
do
ask_version
confirm_answer
done
echo
echo "Installing $libvers/$rtvers"

if ! [ -x $RTFILE ]
then
get_scripts rt /usr/local/bin/rt
chmod 755 /usr/local/bin/rt
fi


crontab -u $SUDO_USER -l | perl -nle 's/^([^#@])/# $1/;print' | crontab -u $SUDO_USER
rt stop
mkdir $home/source
cd $home/source
svn co https://svn.code.sf.net/p/xmlrpc-c/code/stable xmlrpc
curl http://libtorrent.rakshasa.no/downloads/$libvers.tar.gz | tar xz
curl http://libtorrent.rakshasa.no/downloads/$rtvers.tar.gz | tar xz
chown -R $SUDO_USER:$SUDO_USER source

cd xmlrpc
./configure --prefix=/usr --enable-libxml2-backend --disable-libwww-client --disable-wininet-client --disable-abyss-server --disable-cgi-server
make
make install

cd $home/source/$libvers
./autogen.sh
./configure --prefix=/usr
make -j2
make install

cd $home/source/$rtvers
./autogen.sh
./configure --prefix=/usr --with-xmlrpc-c
make -j2
make install
ldconfig

cd $home

sudo -u $SUDO_USER rt start
crontab -u $SUDO_USER -l | perl -nle 's/^#\s*([0-9*])/$1/;print' | crontab -u $SUDO_USER
echo
echo "$libvers/$rtvers installed"
echo
echo "Confirm at https://$SERVERIP/rutorrent"
echo
echo "Your .rtorrent.rc file, and download, watch, and .session directories have not been altered in any way"