#---------------------------------*- sh -*-------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2016 OpenCFD Ltd.
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM.
#
#     OpenFOAM is free software: you can redistribute it and/or modify it
#     under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
#
#     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
#     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
#     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
#     for more details.
#
#     You should have received a copy of the GNU General Public License
#     along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
#
# File
#     etc/tools/vtkFunctions
#
# Description
#     VTK (library) make/install helper functions.
#     To be loaded *after* etc/tools/ParaViewFunctions
#
#------------------------------------------------------------------------------

# buildBASE, installBASE defined from tools/ThirdPartyFunctions

#
# Where things are or should be put
#   VTK_VERSION and VTK_MAJOR should already have been set
#
#   VTK_SOURCE_DIR : location of the original sources
#   VTK_BINARY_DIR : location of the build
#   VTK_DIR        : location of the installed program
#
setVtkDirs()
{
    set -- "VTK-$VTK_VERSION" "VTK-v$VTK_VERSION"
    unset VTK_SOURCE_DIR

    for i
    do
        VTK_SOURCE_DIR="$WM_THIRD_PARTY_DIR/$i"
        [ -d "$VTK_SOURCE_DIR" ] && break
    done

    [ -d "$VTK_SOURCE_DIR" ] || {
        echo "Did not locate VTK version:"
        while [ "$#" -ge 1 ]; do echo "    $1"; shift; done
        echo
        echo "In the directory:"
        echo "    WM_THIRD_PARTY_DIR=$WM_THIRD_PARTY_DIR"
        echo
        echo "abort build"
        exit 1
    }

    # VTK_BINARY_DIR=$buildBASE/VTK-$VTK_VERSION${OBJ_ADD:+-$OBJ_ADD}
    VTK_BINARY_DIR=$buildBASE/VTK-$VTK_VERSION

    # VTK_DIR=$installBASE/VTK-$VTK_VERSION${OBJ_ADD:+-$OBJ_ADD}
    VTK_DIR=$installBASE/VTK-$VTK_VERSION

    export VTK_SOURCE_DIR VTK_BINARY_DIR VTK_DIR

    echo
    echo "VTK_SOURCE_DIR=$VTK_SOURCE_DIR"
    echo "VTK_BINARY_DIR=$VTK_BINARY_DIR"
    echo "VTK_DIR=$VTK_DIR"

    # Forcefully override the .git path for the VTK source code directory
    export GIT_DIR=$ParaView_SOURCE_DIR/.git
}


#
# Set VTK_VERSION and adjust VTK_MAJOR accordingly
#
# $1 can contain something something like 4.4.0, vtk-4.4.0, VTK-4.0.0
#
setVtkVersion()
{
    [ $# -gt 0 ] || {
        echo "Error: function setVtkVersion() called without an argument"
        exit 1
    }

    VTK_VERSION="${1##*-}"

    # The major version is "<digits>.<digits>"
    VTK_MAJOR=$(echo $VTK_VERSION | \
        sed -e 's/^\([0-9][0-9]*\.[0-9][0-9]*\).*$/\1/')

    export VTK_VERSION VTK_MAJOR
}


#------------------------------------------------------------------------------

#
# Apply source-code patch if possible
#
patchVTK()
{
    applyPatch "vtk-$VTK_VERSION" "$VTK_SOURCE_DIR"
}


#
# Configure via cmake, but don't actually build anything
#
configVTK()
{
    local cmake=$(findCMake)

    # Remove any existing build folder and recreate
    if [ -d $VTK_BINARY_DIR ]
    then
        echo "removing old build directory"
        echo "    $VTK_BINARY_DIR"
        rm -rf $VTK_BINARY_DIR
    fi
    mkdir -p $VTK_BINARY_DIR

    addCMakeVariable  "CMAKE_BUILD_TYPE:STRING=$buildType"

    cd $VTK_BINARY_DIR || exit 1  # change to build folder

    echo "----"
    echo "Configuring VTK-$VTK_VERSION"
    echo "    MESA   support : ${withMESA:-false}"
    echo "    Source         : $VTK_SOURCE_DIR"
    echo "    Build          : $VTK_BINARY_DIR"
    echo "    Target         : $VTK_DIR"
    echo "    Build type     : $buildType"
    echo "    Cmake          : $cmake"
    echo "----"
    echo
    echo "$cmake" \
        -DCMAKE_INSTALL_PREFIX:PATH=$VTK_DIR \
        $CMAKE_VARIABLES \
        $VTK_SOURCE_DIR
    echo
    echo "----"
    echo

    # Run cmake to create Makefiles
    $cmake \
        -DCMAKE_INSTALL_PREFIX:PATH=$VTK_DIR \
        $CMAKE_VARIABLES \
        $VTK_SOURCE_DIR
}


#
# Invoke make
# also link bin/ to lib/paraview-* for development without installation
#
makeVTK()
{
    cd $VTK_BINARY_DIR || exit 1  # change to build folder
    echo "    Starting make"
    time make -j $WM_NCOMPPROCS
    echo "    Done make"

    # Remove lib if it is a link
    # (how this was previously handled before 'make install' worked)
    if [ -L lib ]
    then
        rm lib 2>/dev/null
    fi
}


#
# Install the program
#
installVTK()
{
    cd $VTK_BINARY_DIR || exit 1  # Change to build folder
    echo "    Installing VTK to $VTK_DIR"

    make install

cat<< INFO

    ---
    Installation complete for vtk-$VTK_VERSION
    VTK_DIR=$VTK_DIR
    ---
INFO
}


#------------------------------------------------------------------------------

# Clear the referenced variables before using any of the functions
unset CMAKE_VARIABLES

# Start with these general settings
addCMakeVariable  "BUILD_SHARED_LIBS:BOOL=ON  VTK_USE_RPATH:BOOL=OFF"

# Don't build test tree
addCMakeVariable  "BUILD_TESTING:BOOL=OFF"


#------------------------------------------------------------------------------