#!/bin/sh

# Anticonf (tm) script by Jeroen Ooms (2020)

PKG_CONFIG_NAME="opencv4"

PKG_CONFIG_NAME_ALT="opencv"

PKG_DEB_NAME="libopencv-dev"

PKG_RPM_NAME="opencv-devel"

PKG_TEST_HEADER="<opencv2/opencv.hpp>"

PKG_TEST_HEADER_XFEATURES2D="<opencv2/xfeatures2d.hpp>"

PKG_LIBS="-lopencv_{stitching,superres,videostab,aruco,bgsegm,bioinspired,ccalib,dnn_objdetect,\

dpm,face,photo,fuzzy,hfs,img_hash,line_descriptor,optflow,reg,rgbd,saliency,stereo,structured_light,\

phase_unwrapping,surface_matching,tracking,datasets,dnn,plot,xfeatures2d,shape,video,ml,ximgproc,\

calib3d,features2d,highgui,videoio,flann,xobjdetect,imgcodecs,objdetect,xphoto,imgproc,core}"

# Use pkg-config if available

PCVERSION=`pkg-config --version 2>/dev/null`

if [ $? -eq 0 ]; then

  echo "This is pkg-config $PCVERSION"

  if pkg-config --exists ${PKG_CONFIG_NAME} ; then

    PKGCONFIG_CFLAGS=`pkg-config --cflags ${PKG_CONFIG_NAME}`

    PKGCONFIG_LIBS=`pkg-config --libs ${PKG_CONFIG_NAME}`

    PKGCONFIG_PREFIX=`pkg-config --variable=prefix ${PKG_CONFIG_NAME}`

  elif pkg-config --exists ${PKG_CONFIG_NAME_ALT}; then

    PKGCONFIG_CFLAGS=`pkg-config --cflags ${PKG_CONFIG_NAME_ALT}`

    PKGCONFIG_LIBS=`pkg-config --libs ${PKG_CONFIG_NAME_ALT}`

    PKGCONFIG_PREFIX=`pkg-config --variable=prefix ${PKG_CONFIG_NAME_ALT}`

  fi

fi

# Note that cflags may be empty in case of success

if [ "$PKGCONFIG_CFLAGS" ] || [ "$PKGCONFIG_LIBS" ]; then

  echo "Found pkg-config cflags and libs!"

  PKG_CFLAGS=${PKGCONFIG_CFLAGS}

  PKG_LIBS=${PKGCONFIG_LIBS}

  if [ "$PKGCONFIG_PREFIX" ]; then

    PKG_CFLAGS="$PKG_CFLAGS -D_DATA_PREFIX=${PKGCONFIG_PREFIX}"

  fi

elif [ `uname` = "Darwin" ]; then

  curl -sfL "https://autobrew.github.io/scripts/opencv" > autobrew

    . ./autobrew

  uniq cleanup > cleanup_tmp && mv cleanup_tmp cleanup

fi

## adding additional features for Morpho derived C++ functions ### DELETE THIS LATER, Morpho no longer required!

# PKG_LIBS=$(echo $PKG_LIBS $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS))

# PKG_LIBS="$LAPACK_LIBS $BLAS_LIBS $FLIBS $PKG_LIBS"

# For debugging

echo "Using PKG_CFLAGS=$PKG_CFLAGS"

echo "Using PKG_LIBS=$PKG_LIBS"

# Use CXX17 if available (preferred for recent opencv)

CXX17=`${R_HOME}/bin/R CMD config CXX17` || unset CXX17

if [ "$CXX17" ]; then

echo "Found C++17 compiler: $CXX17"

CXXVER=CXX17

else

echo "Using C++11 compiler"

CXXVER=CXX11

fi

CXX=$($R_HOME/bin/R CMD config ${CXXVER})

CXXSTD=$($R_HOME/bin/R CMD config ${CXXVER}STD)

CXXFLAGS="$($R_HOME/bin/R CMD config ${CXXVER}FLAGS)"

CPPFLAGS="$($R_HOME/bin/R CMD config CPPFLAGS)"

CXXCPP="$CXX $CXXSTD -E"

# Test configuration

echo "#include $PKG_TEST_HEADER" | ${CXXCPP} ${CPPFLAGS} ${PKG_CFLAGS} ${CXXFLAGS} -xc++ - >/dev/null 2>configure.log

if [ $? -ne 0 ]; then

  echo "-----------------------------[ ANTICONF ]-------------------------------"

  echo "Configuration failed to find $PKG_CONFIG_NAME library. Try installing:"

  echo " * deb: $PKG_DEB_NAME (Debian, Ubuntu, etc)"

  echo " * rpm: $PKG_RPM_NAME (Fedora, CentOS, RHEL)"

  echo "If $PKG_CONFIG_NAME is already installed, check that 'pkg-config' is in your"

  echo "PATH and PKG_CONFIG_PATH contains a $PKG_CONFIG_NAME.pc file."

  echo "---------------------------[ ERROR MESSAGE ]----------------------------"

  cat configure.log

  echo "------------------------------------------------------------------------"

  exit 1

fi

echo "#include $PKG_TEST_HEADER_XFEATURES2D" | ${CXXCPP} ${CPPFLAGS} ${PKG_CFLAGS}  ${CXXFLAGS} -xc++ - >/dev/null 2>>configure.log

if [ $? -ne 0 ]; then

  echo "Module $PKG_TEST_HEADER_XFEATURES2D has not been found on your system"

  echo "Make sure to have an $PKG_CONFIG_NAME library installed with the module available"

  exit 1

else

  PKG_CFLAGS="$PKG_CFLAGS -DHAVE_XFEATURES2D"

fi

# Write to Makevars

sed -e "s|@cflags@|$PKG_CFLAGS|" -e "s|@libs@|$PKG_LIBS|" -e "s|CXX11|${CXXVER}|" src/Makevars.in > src/Makevars

# Success

exit 0

# Basilisk configuration

${R_HOME}/bin/Rscript -e "basilisk::configureBasiliskEnv()"