#!/usr/bin/env bash

THIS_DIR=$(cd $(dirname $0); pwd)
RAM=`grep MemTotal /proc/meminfo | awk '{print $2}'`
cd $THIS_DIR

update() {
  git pull
  git submodule update --init --recursive
  install_rocks
}

# Will install luarocks on THIS_DIR/.luarocks
install_luarocks() {
  git clone https://github.com/keplerproject/luarocks.git
  cd luarocks
  git checkout tags/v2.2.1 # Current stable

  PREFIX="$THIS_DIR/.luarocks"

  ./configure --prefix=$PREFIX --sysconfdir=$PREFIX/luarocks --force-config

  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting."; exit $RET;
  fi

  make build && make install
  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting.";exit $RET;
  fi

  cd ..
  rm -rf luarocks
}

install_rocks() {
  ./.luarocks/bin/luarocks install luasocket
  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting."; exit $RET;
  fi

  ./.luarocks/bin/luarocks install oauth
  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting."; exit $RET;
  fi

  ./.luarocks/bin/luarocks install redis-lua
  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting."; exit $RET;
  fi

  ./.luarocks/bin/luarocks install lua-cjson
  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting."; exit $RET;
  fi

  ./.luarocks/bin/luarocks install fakeredis
  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting."; exit $RET;
  fi

  ./.luarocks/bin/luarocks install xml
  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting."; exit $RET;
  fi
}

install() {
  git pull
  git submodule update --init --recursive
  # If RAM is lower than 300MB disable extf queries
  if [ $RAM -lt 307200 ]; then
      cd tg && ./configure --disable-extf && make
  else
      cd tg && ./configure && make
  fi
  RET=$?; if [ $RET -ne 0 ];
    then echo "Error. Exiting."; exit $RET;
  fi
  cd ..
  install_luarocks
  install_rocks
}

if [ "$1" = "install" ]; then
  install
elif [ "$1" = "update" ]; then
  update
else
  if [ ! -f ./tg/telegram.h ]; then
    echo "tg not found"
    echo "Run $0 install"
    exit 1
  fi

  if [ ! -f ./tg/bin/telegram-cli ]; then
    echo "tg binary not found"
    echo "Run $0 install"
    exit 1
  fi

  ./tg/bin/telegram-cli -k ./tg/tg-server.pub -s ./bot/bot.lua -l 1 -E
fi