#!/bin/bash
if [ "`id -u`" != "0" ]; then
  echo "Script must run as root"
fi

di=`date +%s`
local=0
if [ "$1" == "local" ]; then
  local=1
  echo "==========USING LOCAL FILE $2==========="
  if [ ! -r "$2" ]; then
    echo "======NOT FOUND: $2==========="
    exit 1
  else
    echo "USING LOCAL FILE: $2"
	basedir=`dirname "$2"`
	echo $basedir | grep -q '^/' 2> /dev/null
    if [ $? == 0 ]; then
      basenam=`basename "$2" .tgz`
      bocaver=`echo $basenam | cut -d'-' -f2-`
      echo "INSTALLING ON $basedir"
      echo "INSTALLING VERSION $bocaver"
      echo "=========="
    else
      echo "======YOU MUST PROVIDE FULL PATH OF FILE $2====="
      exit 1
    fi
  fi
else
  echo "==================================================="
  echo "=================== obtaining BOCA  ==============="
  echo "==================================================="

  wget -O /tmp/.boca.tmp "http://www.ime.usp.br/~cassio/boca/boca.date.txt"
  echo ">>>>>>>>>>"
  echo ">>>>>>>>>> Downloading boca release `cat /tmp/.boca.tmp`"
  echo ">>>>>>>>>>"

  if [ "$1" == "" ]; then
    wget -O /tmp/.boca.tmp "http://www.ime.usp.br/~cassio/boca/bocaver.txt"
    bocaver=`cat /tmp/.boca.tmp`
  else
    bocaver=$1
  fi
  basedir=$2
fi

if [ "$basedir" == "" ]; then
  basedir=/var/www
fi
if [ ! -d "$basedir" ]; then
  echo "Directory $2 does not exist"
  exit 1
fi

OK=y
read -p "I will install boca at $basedir is it correct (otherwise, run this script as: $0 $bocaver <installdir> to choose the place) [y/n]? " OK
if [ "$OK" == "y" -o "$OK" == "Y" ]; then
  echo "Install directory is $basedir"
else
  echo "Aborted"
  exit 1
fi

if [ "$local" == "0" ]; then
  echo "Looking for BOCA version $bocaver from http://www.ime.usp.br/~cassio/boca/"
  cd $basedir
  rm -f boca-$bocaver.tgz
  wget -O boca-$bocaver.tgz "http://www.ime.usp.br/~cassio/boca/download.php?filename=boca-$bocaver.tgz"
  if [ "$?" != "0" -o ! -f boca-$bocaver.tgz ]; then
    echo "ERROR downloading BOCA package version $bocaver. Aborting *****************"
    exit 1
  fi
  grep -qi "bad parameters" boca-$bocaver.tgz
  if [ "$?" == "0" ]; then
    echo "ERROR downloading BOCA package version $bocaver. Aborting *****************"
    exit 1
  fi
fi

echo "==========================================================="
echo "====================== BACKUPING OLD BOCA   ==============="
echo "==========================================================="
if [ -d boca-$bocaver ]; then
  mv boca-$bocaver boca-$bocaver.$di
  echo "OLD BOCA FOLDER for version $bocaver saved as boca-$bocaver.$di"
fi

echo "bocadir=$basedir/boca" > /etc/boca.conf
chmod 644 /etc/boca.conf

echo "====================================================="
echo "=================== EXTRACTING BOCA   ==============="
echo "====================================================="

OK=x
conffile=boca/src/private/conf.php
if [ ! -f $conffile ]; then
conffile=boca-$bocaver.$di/src/private/conf.php
fi
if [ -f $conffile ]; then
 echo "OLD CONFIG FILE EXISTS"
 OK=x
 while [ "$OK" != "y" -a "$OK" != "n" ]; do
   OK=x
   read -p "Do you want to keep the old private/conf.php file [y/n] (note that the old file might be incompatible with this version)? " OK
 done
 if [ "$OK" == "n" ]; then
   echo "You probably need to update the new file boca-$bocaver/src/private/conf.php with the correct passwords - PLEASE CHECK IT - NOT DONE AUTOMATICALLY"
 fi
else
  echo "OLD Config file not found -- you must set up the new private/conf.php file properly"
fi

apacheuser=
[ -r /etc/icpc/apacheuser ] && apacheuser=`cat /etc/icpc/apacheuser | sed 's/ \t\n//g'`
[ "$apacheuser" == "" ] && apacheuser=www-data
id -u $apacheuser >/dev/null 2>/dev/null
if [ $? != 0 ]; then
  echo "User $apacheuser not found -- error to set permissions with chown/chmod"
  apacheuser=root
fi

tar xzf boca-$bocaver.tgz
chown -R root.$apacheuser boca-$bocaver/
chmod -R g+rx,u+rwx boca-$bocaver/

chmod 600 boca-$bocaver/src/private/*.php
[ -f boca-$bocaver.$di/src/private/remotescores/otherservers ] && cp -f boca-$bocaver.$di/src/private/remotescores/otherservers boca-$bocaver/src/private/remotescores/otherservers
if [ "$OK" == "y" ]; then
	cp -f $conffile boca-$bocaver/src/private/conf.php
	[ -f boca-$bocaver.$di/src/private/run-using-command.config ] && cp -f boca-$bocaver.$di/src/private/run-using-command.config boca-$bocaver/src/private/run-using-command.config 
fi
chmod 700 boca-$bocaver/tools/*.sh

if [ -f boca-$bocaver.$di/src/private/run-past.config ]; then
	cp -f boca-$bocaver.$di/src/private/run-past.config boca-$bocaver/src/private/run-past.config
else
	echo "`date +%sN`-sha256sum-`date +%sN`" | sha256sum - | cut -d' ' -f1 > boca-$bocaver/src/private/run-past.config
fi
chmod 550 boca-$bocaver/src/private/run-past.config
chown www-data.www-data boca-$bocaver/src/private/run-past.config

cp boca-$bocaver/tools/boca-submit-run* /usr/bin/
chmod 755 /usr/bin/boca-submit-run*
chmod 700 /usr/bin/boca-submit-run-cron

cat > /tmp/boca-submit-run-root-wrapper.c <<EOF
#include<stdlib.h>
#include<stdio.h>
#include<sys/types.h>
#include<unistd.h>
char str[10000];
int main(int argc, char **argv) {
  if(argc != 8) return 1;
  sprintf(str,"/usr/bin/boca-submit-run-root %1000s %1000s %1000s %1000s %1000s %1000s %1000s",argv[1],argv[2],argv[3],argv[4],argv[5],argv[6],argv[7]);
  setuid(0);
  system(str);
  return 0;
}
EOF
gcc -o /usr/bin/boca-submit-run-root-wrapper /tmp/boca-submit-run-root-wrapper.c
rm -f /tmp/boca-submit-run-root-wrapper.c
chown root.root /usr/bin/boca-submit-run-root-wrapper
chmod 4555 /usr/bin/boca-submit-run-root-wrapper
echo "*/2 * * * * root /usr/bin/boca-submit-run-cron >>/var/log/bocacron.out 2>>/var/log/bocacron.err" > /etc/cron.d/boca

cat > boca-$bocaver/src/.htaccess <<EOF
php_flag output_buffering on
php_value memory_limit 256M
php_value post_max_size 128M
php_flag magic_quotes_gpc off
php_value upload_max_filesize 128M
EOF
chmod 755 boca-$bocaver/src/.htaccess
cat > boca-$bocaver/tools/.htaccess <<EOF
Deny from all
EOF
chmod 755 boca-$bocaver/tools/.htaccess
cp boca-$bocaver/tools/.htaccess boca-$bocaver/doc/.htaccess
cp boca-$bocaver/tools/.htaccess boca-$bocaver/old/.htaccess
cp boca-$bocaver/tools/.htaccess boca-$bocaver/src/private/.htaccess

chmod -R 770 boca-$bocaver/src/private
chmod -R 775 boca-$bocaver/src/balloons

echo "=========================================================================================="
echo "=========== SETTING UP SOME LINKS (main apache server index.html updated)  ==============="
echo "=========================================================================================="

rm -f $basedir/boca /usr/bin/makebkp.sh
ln -s $basedir/boca-$bocaver $basedir/boca
ln -s $basedir/boca/tools/makebkp.sh /usr/bin/makebkp.sh
chmod 755 $basedir/boca/tools/makebkp.sh
chmod 755 $basedir/boca/tools/singlefilebkp.sh

echo "=============================================================="
echo "================== COMPILING safeexec utility  ==============="
echo "=============================================================="

cd $basedir/boca/tools
gcc -static -O2 -Wall safeexec.c -o safeexec
if [ $? == 0 ]; then
  echo "COMPILATION OK"
fi
strip safeexec
cp -f safeexec /usr/bin
chmod 4555 /usr/bin/safeexec
[ -d /bocajail/usr/bin ] && cp -a /usr/bin/safeexec /bocajail/usr/bin/

if [ -f /etc/icpc/installboca.sh ]; then
  cp $basedir/boca/tools/etc/icpc/installboca.sh /etc/icpc/installboca.sh
  chmod 700 /etc/icpc/installboca.sh
fi

echo "=================================================="
echo "=================== SERVER SETUP   ==============="
echo "=================================================="
ln -s /etc/php5/mods-available/mcrypt.ini /etc/php5/apache2/conf.d/20-mcrypt.ini 2>/dev/null
ln -s /etc/php5/mods-available/mcrypt.ini /etc/php5/cli/conf.d/20-mcrypt.ini 2>/dev/null

OK=n
echo "You can run at anytime later the script /etc/icpc/becomeserver.sh to prepare the computer to be the BOCA server"
read -p "Do you want me to call the script to make this computer the server (don't do it if this install is for a team or autojudge) [y/N]? " OK
if [ "$OK" == "y" -o "$OK" == "Y" ]; then
  OK=n
  read -p "Do you really want to make this computer the server? (DONT DO IT if you are only upgrading BOCA) [y/N]? " OK
  if [ "$OK" == "y" -o "$OK" == "Y" ]; then
    /etc/icpc/becomeserver.sh
  fi
fi

cat > /etc/apache2/conf.d/boca <<EOF
<Directory $basedir/boca/src>
       AllowOverride Options AuthConfig Limit
       Order Allow,Deny
       Allow from all
       AddDefaultCharset utf-8
</Directory>
<Directory $basedir/boca/src/private>
       AllowOverride Options AuthConfig Limit
       Deny from all
</Directory>
<Directory $basedir/boca>
       AllowOverride Options AuthConfig Limit
       Deny from all
</Directory>
Alias /boca $basedir/boca/src
EOF

ln -s /etc/apache2/conf.d/boca /etc/apache2/conf-enabled/boca.conf 2>/dev/null