#!/usr/bin/env bash

# script to facilitate easy installation of the matlab runtime package

set -e

patch_installer() {
   (cd $1 && rm -f $2.NEW $2.ORIG)
   (cd $1 && cp -p -f $2 $2.ORIG && chmod +w $2)
   (cd $1 && cat $2 | sed 's;arch_in=.*;arch_in=maci64;' > $2.NEW)
   (cd $1 && cp -p -f $2.NEW $2 && chmod 755 $2)
   ## debug
   # echo "Changed matlab $2 script for arch=arm to install x86_64 binaries"
   # (cd $1 && diff $2 $2.ORIG)
}

# check arguments
if [ "$#" -ne 1 ]; then
    echo "ERROR: must specify MCR version as argument"
    echo "EXAMPLE: fs_install_mcr R2019b"
    exit 1
fi

MCR_VER="$1"

# check FS directory
if [[ -z "$FREESURFER_HOME" ]]; then
    echo "ERROR: must set FREESURFER_HOME before installing"
    echo "INFO: if you're using sudo, make sure to pass the FS home variable with"
    echo "INFO: sudo FREESURFER_HOME=\$FREESURFER_HOME fs_install_mcr $@"
    exit 1
fi

# operate in tmp directory
TMP_DIR=$(mktemp -d 2>/dev/null || mktemp -d -t 'mytmpdir')
cd $TMP_DIR

# cleanup tmp directory at exit
function cleanup {
    cd $FREESURFER_HOME
    rm -rf $TMP_DIR
}
trap cleanup EXIT

if [ "$(uname -s)" == "Linux" ]; then
    OS_TAG=glnxa64
else
    OS_TAG=maci64
fi

# download the os-specific installer
if [[ "$MCR_VER" =~ R2012a|R2012b|R2013a ]]; then
    curl --location https://ssd.mathworks.com/supportfiles/MCR_Runtime/$MCR_VER/MCR_${MCR_VER}_${OS_TAG}_installer.zip -o installer.zip
elif [[ "$MCR_VER" =~ R2019b ]]; then
    curl --location https://ssd.mathworks.com/supportfiles/downloads/$MCR_VER/Release/9/deployment_files/installer/complete/$OS_TAG/MATLAB_Runtime_${MCR_VER}_Update_9_${OS_TAG}.zip -o installer.zip
elif [[ "$MCR_VER" =~ R2014a|R2014b ]]; then
    curl --location https://ssd.mathworks.com/supportfiles/downloads/$MCR_VER/deployment_files/$MCR_VER/installers/$OS_TAG/MCR_${MCR_VER}_${OS_TAG}_installer.zip -o installer.zip
else
    echo "Unsupported runtime version $MCR_VER"
    exit 1
fi
unzip installer.zip

# run non-interactive installation
TMP_DEST_DIR=$TMP_DIR/install-target

# On MacOS, the GUI installer may be called and install in the default path.
# It will automatically delete and re-install the same distro found there.
darwin_gui_install="/Applications/MATLAB/MATLAB_Runtime"
APPLE_M1="false"

# Hack the matlab install script to think the arch is maci64 on an arm Apple machine (uname -p = arm)
if [[ "$(uname -s)" == "Darwin" ]] && [[ "$(uname -p)" == "arm" ]]; then
   APPLE_M1="true"
   patch_installer $TMP_DIR install
   patch_installer $TMP_DIR/bin/maci64 install_unix
   printf "\n"
   echo "*** IMPORTANT NOTE ***"
   echo "If you are prompted by the MATLAB installer to specify where to intall"
   echo "the runtime environment, then please use this (default) path:"
   echo "$darwin_gui_install"
   echo "Otherwise, the installation will be incomplete."
   printf "\n"
fi

./install -mode silent -agreeToLicense yes -destinationFolder $TMP_DEST_DIR
## debug
# bash -x ./install -mode silent -agreeToLicense yes -destinationFolder $TMP_DEST_DIR

if [ -e $TMP_DEST_DIR/v* ]; then
   # move mcr install to freesurfer directory
   MCR_DIR="$(ls -d $TMP_DEST_DIR/v*)"
   MCR_NAME="$(basename $MCR_DIR)"
   MCR_TARGET_DIR=$FREESURFER_HOME/MCR$MCR_NAME

   if [ -d "$MCR_TARGET_DIR" ]; then
       # MCR already installed
       echo "MCR $MCR_NAME ($MCR_VER) already exists in $FREESURFER_HOME"
       read -p "do you want to reinstall? [y/n] " -n 1 -r
       echo
       if [[ ! $REPLY =~ ^[Yy]$ ]]; then
           echo "exiting without install"
           exit 0
       fi
       rm -rf $MCR_TARGET_DIR
   fi

   mv $MCR_DIR $MCR_TARGET_DIR
   echo "$MCR_VER installed successfully in $MCR_TARGET_DIR"

elif [ "$APPLE_M1" == "true" ]; then 
   # Try to fall back to default Matlab GUI install path
   if [ -e $darwin_gui_install/v* ]; then
      MCR_DIR="$(ls -d $darwin_gui_install/v*)"
      MCR_NAME="$(basename $MCR_DIR)"
      MCR_TARGET_DIR=$FREESURFER_HOME/MCR$MCR_NAME
      # create soft link in FS tree pointing to gui install path
      if [ -d $darwin_gui_install/$MCR_NAME ]; then
         echo "If prompted for a password, please enter it (must be run from an account with sudo permission)."
         (cd $FREESURFER_HOME && sudo rm -f $MCR_TARGET_DIR)
         (cd $FREESURFER_HOME && sudo ln -s $darwin_gui_install/$MCR_NAME $MCR_TARGET_DIR)
         (cd $FREESURFER_HOME && ls -l $MCR_TARGET_DIR)
         echo "$MCR_VER installed successfully in $MCR_TARGET_DIR"
      fi
   fi
fi