#!/bin/bash

# Latest version of this script can be found at:
#   https://github.com/NanoComp/meep/blob/master/contrib/build-meep.sh

help ()
{
    cat << EOF

$1: Download MEEP sources and dependencies, compile, and install

Usage: $1 [options]
EOF
    sed -ne 's,[ \t]*\(-[^ \t]*\))[^#]*#[ \t]*\(.*\),    \1 \2,p' "$1"
    echo ""
    exit 1
}

[ -z "$1" ] && echo "(use -h for help)"

installdeps=true

while [ ! -z "$1" ]; do
    case "$1" in
        -h)         # help
            help "$0"
            ;;
        -d)         # <installdir>  (default: current directory)
            DESTDIR="$2"
            shift
            ;;
        -s)         # use 'sudo' for 'make install'
            SUDO=sudo
            ;;
        -n)         # do not check for distribution dependencies
            installdeps=false
            ;;
        *)
            echo "'$1' ?"
            help "$0"
            ;;
    esac
    shift
done


# detect wether DESTDIR is ending with src/
[ -z ${DESTDIR} ] && DESTDIR=$(pwd)
[ ${DESTDIR##*/} = src ] && DESTDIR=$(cd $(pwd)/..; pwd)
SRCDIR=${DESTDIR}/src

cat << EOF

This sript will download or update sources, compile and install MEEP.
Please ensure the following final paths fit your needs:
    '${DESTDIR}/bin/meep'
    '${DESTDIR}/lib/...'
    '${DESTDIR}/share/...'
    '${DESTDIR}/...'
    '${SRCDIR}/<sources>'

Press return to continue
EOF
read junk

if ! lsb_release; then
    echo "Minimum requirements:"
    echo "    Ubuntu:"
    echo "        sudo apt-get -y install lsb-release sudo git"
    echo "    CentOS:"
    echo "        sudo yum -y install redhat-lsb-core sudo git"
    echo ""
    exit 1
fi

set -ex

ubuntu=false
centos=false

distrib=$(lsb_release -r -s)
case "$distrib" in
    18.04) # ubuntu 18.04 bionic
        libpng=libpng-dev
        libpython=libpython3-dev
        ubuntu=true
        ;;
    16.04) # ubuntu 16.04 xenial
        libpng=libpng16-dev
        libpython=libpython3.5-dev
        ubuntu=true
        ;;
    7.*) # CentOS 7.x
        centos=true
        ;;
    *)
        echo "unsupported distribution '$(lsb_release -a)', edit and fix!"
        false
        ;;
esac

mkdir -p ${SRCDIR}
cd ${SRCDIR}

gitclone ()
{
    repo=${1##*/}
    name=${repo%%.*}
    echo $repo $name
    if [ -d $name ]; then
        ( cd $name; git pull; )
    else
        git clone --depth=1 $1
    fi
}

autogensh ()
{
    sh autogen.sh PKG_CONFIG_PATH="${PKG_CONFIG_PATH}" RPATH_FLAGS="${RPATH_FLAGS}" LDFLAGS="${LDFLAGS}" CFLAGS="${CFLAGS}" CPPFLAGS="${CPPFLAGS}" \
        --disable-static --enable-shared --prefix="${DESTDIR}" \
        --with-libctl=${DESTDIR}/share/libctl \
        "$@"
}

if $installdeps && $ubuntu; then

    sudo apt-get update

    sudo apt-get -y install     \
        build-essential         \
        gfortran                \
        libblas-dev             \
        liblapack-dev           \
        libgmp-dev              \
        swig                    \
        libgsl-dev              \
        autoconf                \
        pkg-config              \
        $libpng                 \
        git                     \
        guile-2.0-dev           \
        libfftw3-dev            \
        libhdf5-openmpi-dev     \
        hdf5-tools              \
        $libpython              \
        python3-numpy           \
        python3-scipy           \
        python3-pip             \
        ffmpeg                  \

    [ "$distrib" = 16.04 ] && sudo -H pip3 install --upgrade pip
    sudo -H pip3 install --no-cache-dir mpi4py
    export HDF5_MPI="ON"
    sudo -H pip3 install --no-binary=h5py h5py
    sudo -H pip3 install matplotlib>3.0.0

    RPATH_FLAGS="-Wl,-rpath,${DESTDIR}/lib:/usr/lib/x86_64-linux-gnu/hdf5/openmpi"
    LDFLAGS="-L${DESTDIR}/lib -L/usr/lib/x86_64-linux-gnu/hdf5/openmpi ${RPATH_FLAGS}"
    CFLAGS="-I${DESTDIR}/include -I/usr/include/hdf5/openmpi"

fi

if $installdeps && $centos; then

    sudo yum -y --enablerepo=extras install epel-release

    sudo yum -y install   \
        bison             \
        byacc             \
        cscope            \
        ctags             \
        cvs               \
        diffstat          \
        oxygen            \
        flex              \
        gcc               \
        gcc-c++           \
        gcc-gfortran      \
        gettext           \
        git               \
        indent            \
        intltool          \
        libtool           \
        patch             \
        patchutils        \
        rcs               \
        redhat-rpm-config \
        rpm-build         \
        subversion        \
        systemtap         \
        wget

    sudo yum -y install    \
        openblas-devel     \
        fftw3-devel        \
        libpng-devel       \
        gsl-devel          \
        gmp-devel          \
        pcre-devel         \
        libtool-ltdl-devel \
        libunistring-devel \
        libffi-devel       \
        gc-devel           \
        zlib-devel         \
        openssl-devel      \
        sqlite-devel       \
        bzip2-devel        \
        ffmpeg

    sudo yum -y install    \
        openmpi-devel      \
        hdf5-openmpi-devel \
        guile-devel        \
        swig

    export PATH=${PATH}:/usr/lib64/openmpi/bin
    RPATH_FLAGS="-Wl,-rpath,${DESTDIR}/lib:/usr/lib64/openmpi/lib"
    LDFLAGS="-L${DESTDIR}/lib -L/usr/lib64/openmpi/lib ${RPATH_FLAGS}"
    CFLAGS="-I${DESTDIR}/include -I/usr/include/openmpi-x86_64/"
fi

CPPFLAGS=${CFLAGS}
PKG_CONFIG_PATH=${DESDTIR}/pkgconfig
export PKG_CONFIG_PATH
export PATH=${DESTDIR}/bin:${PATH}

mkdir -p $SRCDIR

cd $SRCDIR
gitclone https://github.com/NanoComp/harminv.git
cd harminv/
autogensh
make -j && $SUDO make install

cd $SRCDIR
gitclone https://github.com/NanoComp/libctl.git
cd libctl/
autogensh
make -j && $SUDO make install

cd $SRCDIR
gitclone https://github.com/NanoComp/h5utils.git
cd h5utils/
autogensh CC=mpicc
make -j && $SUDO make install

cd $SRCDIR
gitclone https://github.com/NanoComp/mpb.git
cd mpb/
autogensh CC=mpicc --with-hermitian-eps
make -j && $SUDO make install

cd $SRCDIR
gitclone https://github.com/HomerReid/libGDSII.git
cd libGDSII/
autogensh
make -j && $SUDO make install

cd $SRCDIR
gitclone https://github.com/NanoComp/meep.git
cd meep/
autogensh --with-mpi --with-openmp PYTHON=python3
make -j && $SUDO make install

# all done