#!/usr/bin/env bash

set -e

ver_major=13
ver_minor=2
ver_bugfix=0

GCC=gcc-$ver_major.$ver_minor.$ver_bugfix
core=$(nproc --all)

aptpkgs=$(<"res/_aptpkgs")
conf1=$(<"res/_conf1_sys")
conf2=$(<"res/_conf2_lang")
conf3=$(<"res/_conf3_build")
conf4=$(<"res/_conf4_after")
conf5=$(<"res/_conf5_multi")
conf6=$(<"res/_conf6_comp")


echo ""
echo "================================================"
echo ""
echo " $GCC install script (only for $USER)"
echo ""
echo "             by github.com/kitsune03k with love"
echo ""
echo "================================================"


echo $'\nchoose your computing power'
echo "1. low"
echo "2. normal <-recommended"
echo "3. high"

while true; do
  read -rp "Selection (1/2/3): " psel

  if [ "$psel" == "1" ] || [ "$psel" == "2" ] || [ "$psel" == "3" ]; then
    power=$(<"power/_power_$psel")
    break
  else
    echo "input correctly!!"
  fi
done


echo $'\n* Some line needs root privilege *'

while true; do
  read -rp "input current account($USER) password: " uPwrd
  read -rp "is this really correct? (Y/N): " pValid

  if [ $pValid = "Y" ] || [ $pValid = "y" ]; then
    break
  elif [ "$pValid" == "N" ] || [ "$pValid" == "n" ]; then
    continue
  else
    echo "input correctly!!"
  fi
done


echo $'\n*** Final Step ***\nWarning: INSTALL TAKES LOTS OF TIME\nContinue?'

while true; do
  read -rp "Selection (Y/N): " sel

  if [ "$sel" == "Y" ] || [ "$sel" == "y" ]; then
    break
  elif [ "$sel" == "N" ] || [ "$sel" == "n" ]; then
    echo "*** \"make\", \"make install\" left. Do with sudo. ***"
    exit 0
  else
    echo "input correctly!!"
  fi
done


cd /$HOME

git clone https://github.com/kitsune03k/glibc_install_script
cd glibc_install_script && chmod 766 *.sh
./glibc_install_script_pwargv.sh $uPwrd

cd /$HOME

echo "$uPwrd" | sudo -S apt update
sudo -K

echo "$uPwrd" | sudo -S apt upgrade -y
sudo -K

echo "$uPwrd" | sudo -S apt install -y $aptpkgs
sudo -K


GCC_TAR=$GCC.tar
GCC_TAR_GZ=$GCC_TAR.gz
l_GCC=https://ftp.gnu.org/gnu/gcc/$GCC/$GCC_TAR_GZ

# file
if test -e "$GCC_TAR_GZ"; then
  rm $GCC_TAR_GZ
fi

if test -e "$GCC_TAR"; then
  rm $GCC_TAR_GZ
fi

# directory
if test -d "$GCC"; then
  echo "$uPwrd" | sudo -S rm -rf $GCC
  sudo -K
fi

# download and decompress
wget $l_GCC && gzip -d $GCC_TAR_GZ && tar -xf $GCC_TAR && rm $GCC_TAR
cd $GCC

echo "$uPwrd" | sudo -S ./contrib/download_prerequisites
sudo -K

echo "$uPwrd" | sudo -S ./configure $power $conf1 $conf2 $conf3 $conf4 $conf5 $conf6
sudo -K


start=$(date +%s)
echo "$uPwrd" | sudo -S make -j$core
sudo -K

echo "$uPwrd" | sudo -S make install -j$core
sudo -K
end=$(date +%s)

cd /$HOME
echo "$uPwrd" | sudo -S rm -rf $GCC
sudo -K


echo $'\n================================================'
echo " *** $GCC installation successful!!! ***"
echo " in $(($end-$start)) seconds"
echo $'================================================\n'