# Copyright 1999-2006 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

inherit eutils

DESCRIPTION="NETGEN is an automatic 3d tetrahedral mesh generator"
HOMEPAGE="http://www.hpfem.jku.at/netgen/"
SRC_URI="ngs44.tar.gz"

LICENSE="LGPL"
KEYWORDS="amd64 x86"
IUSE="opencascade blas lapack gmp"
RDEPEND="opencascade? ( sci-libs/opencascade )
	blas? ( virtual/blas )
	lapack? ( virtual/lapack )
	gmp? ( dev-libs/gmp ) "

pkg_nofetch() {
        einfo "Please download ${SRC_URI} from ${HOMEPAGE} and move it to ${DISTDIR}"
}

DEPEND="${RDEPEND}
	virtual/opengl
	virtual/x11
	>=dev-lang/tk-8.0
	>=dev-lang/tcl-8.0
	x86? ( >=dev-tcltk/tix-8.1 )"

src_unpack() {
        unpack ${A}
	MY_S=${WORKDIR}/ngs44
        cd ${MY_S}
	epatch ${FILESDIR}/togl_tk.patch
	epatch ${FILESDIR}/meshtype.patch
	epatch ${FILESDIR}/densemat.patch
	epatch ${FILESDIR}/debian-netgen_4.4-7.patch
}

src_compile() {
        cd ${MY_S}
	export MACHINE="LINUX"
	export LAPACK="-lg2c"

	# Fix the Makefiles
        local tk_version
        tk_version=$(grep TK_VER /usr/include/tk.h | sed 's/^.*"\(.*\)".*/\1/')
	tk_release_serial=$(grep TK_RELEASE_SERIAL /usr/include/tk.h | awk '{print $3}')
        sed -i "s:tk8.4:tk${tk_version}:g" ./Makefile
	sed -i "s:tk8.4:tk${tk_version}:g" ./libsrc/makefile.mach.LINUX
        
	# tix 8.4.0 does not build on AMD64 at the moment. Hopefully this will
        # be corrected soon.
        if use x86; then
                local tix_version
                tix_version=$(grep TIX_VER /usr/include/tix.h | sed 's/^.*"\(.*\)".*/\1/')
                sed -i "s:tix8.1.8.4:tix${tix_version}:g" ./Makefile
        fi

        local tcl_version
        tcl_version=$(grep TCL_VER /usr/include/tcl.h | sed 's/^.*"\(.*\)".*/\1/')
        sed -i "s:tcl8.4:tcl${tcl_version}:g" ./Makefile
	sed -i "s:tcl8.4:tcl${tcl_version}:g" ./libsrc/makefile.mach.LINUX

	sed -i "s:CPP_DIR=.:CPP_DIR=${MY_S}:g" ./Makefile
	sed -i "s:-L/usr/openwin/lib -L/usr/X11R6/lib -L/usr/lib/GL3.5:-L/usr/X11R6/lib -L/usr/lib/GL:g" ./libsrc/makefile.mach.LINUX

	if use opencascade; then
		sed -i "s:/opt/OpenCASCADE5.2:$CASROOT/../:g" ./Makefile
# This was a dirty hack and it does not work. All of this is based on old fashion Makefile and somehow
# I do not succeed to remove the dependency on OpenCascade.
# There is probably a flag or something to switch off. Any help is welcome!
#	else
#		sed -i "s:OCC_DIR=/opt/OpenCASCADE5.2:# OCC_DIR=/opt/OpenCASCADE5.2:g" ./Makefile
#		sed -i "s:OCCINC_DIR=\$(OCC_DIR)/ros/inc:# OCCINC_DIR=\$(OCC_DIR)/ros/inc:g" ./Makefile
#		sed -i "s:OCCLIB_DIR=\$(OCC_DIR)/ros/lin/lib:# OCCLIB_DIR=\$(OCC_DIR)/ros/lin/lib:g" ./Makefile
#		sed -i "s:-locc::g" ./Makefile
#		sed -i "s:occlib:# occlib:g" ./Makefile
	fi

	if use lapack; then
		LAPACK = "${LAPACK} -llapack"
	fi

	if use blas; then
		LAPACK = "${LAPACK} -lblas"
	fi

	if use gmp; then
		LAPACK = "${LAPACK} -lgmp"
	fi

	sed -i "s:# lapack =  -llapack  -lblas -lgmp -lg2c:lapack = $LAPACK:g" ./Makefile

	# Copy tkInt.h from the system to the source to correct the issue with togl.cpp
	cp -p /usr/lib/tk${tk_version}/include/generic/tkInt.h ./togl/tkInt${tk_version}p${tk_release_serial}.h
	cp -p /usr/lib/tk${tk_version}/include/generic/tkIntDecls.h ./togl/tkIntDecls${tk_version}p${tk_release_serial}.h
	sed -i "s:tkIntDecls.h:./tkIntDecls${tk_version}p${tk_release_serial}.h:g" ./togl/tkInt${tk_version}p${tk_release_serial}.h

	# Build 2 extra demo applications
	#sed -i "s:# appdemo:appdemo:g" ./Makefile
	#sed -i "s:# appaddon:appaddon:g" ./Makefile
	#sed -i "s:# appngs:appngs:g" ./Makefile
	#sed -i "s:#	cd demoapp:	cd demoapp:g" ./Makefile
        #sed -i "s:#	cd ngsolve:	cd ngsolve:g" ./Makefile

	less Makefile

        emake || die "emake failed"
}

src_install() {
        cd ${MY_S}
        dobin ng 
	dodoc ./doc/ng4.pdf LGPL VERSION
	dodir /usr/share/${PF}
        insinto /usr/share/${PF}
	find . -name "*.tcl" -exec doins --parents {} \;
	dodir /usr/share/${PF}/tutorials
        insinto /usr/share/${PF}/tutorials
	doins ./tutorials/*
}