# https://cmake.org/cmake/help/latest/variable/MSVC_VERSION.html
if (MSVC_VERSION EQUAL 1800)
# 1800      = VS 12.0 (v120 toolset)
    set(DEP_VS_VER "12")
    set(DEP_BOOST_TOOLSET "msvc-12.0")
elseif (MSVC_VERSION EQUAL 1900)
# 1900      = VS 14.0 (v140 toolset)    
    set(DEP_VS_VER "14")
    set(DEP_BOOST_TOOLSET "msvc-14.0")
elseif (MSVC_VERSION LESS 1920)
# 1910-1919 = VS 15.0 (v141 toolset)
    set(DEP_VS_VER "15")
    set(DEP_BOOST_TOOLSET "msvc-14.1")
elseif (MSVC_VERSION LESS 1930)
# 1920-1929 = VS 16.0 (v142 toolset)
    set(DEP_VS_VER "16")
    set(DEP_BOOST_TOOLSET "msvc-14.2")
else ()
    message(FATAL_ERROR "Unsupported MSVC version")
endif ()

if (CMAKE_CXX_COMPILER_ID STREQUAL Clang)
    set(DEP_BOOST_TOOLSET "clang-win")
endif ()

if (${DEPS_BITS} EQUAL 32)
    set(DEP_MSVC_GEN "Visual Studio ${DEP_VS_VER}")
    set(DEP_PLATFORM "Win32")
else ()
    if (DEP_VS_VER LESS 16)
        set(DEP_MSVC_GEN "Visual Studio ${DEP_VS_VER} Win64")
    else ()
        set(DEP_MSVC_GEN "Visual Studio ${DEP_VS_VER}")
    endif ()
    set(DEP_PLATFORM "x64")
endif ()

if (${DEP_DEBUG})
    set(DEP_BOOST_DEBUG "debug")
else ()
    set(DEP_BOOST_DEBUG "")
endif ()

macro(add_debug_dep _dep)
if (${DEP_DEBUG})
    ExternalProject_Get_Property(${_dep} BINARY_DIR)
    ExternalProject_Add_Step(${_dep} build_debug
        DEPENDEES build
        DEPENDERS install
        COMMAND msbuild /m /P:Configuration=Debug INSTALL.vcxproj
        WORKING_DIRECTORY "${BINARY_DIR}"
    )
endif ()
endmacro()

# ExternalProject_Add(dep_boost
#     EXCLUDE_FROM_ALL 1
#     URL "https://dl.bintray.com/boostorg/release/1.75.0/source/boost_1_75_0.tar.gz"
#     URL_HASH SHA256=aeb26f80e80945e82ee93e5939baebdca47b9dee80a07d3144be1e1a6a66dd6a
#     BUILD_IN_SOURCE 1
#     CONFIGURE_COMMAND bootstrap.bat
#     BUILD_COMMAND b2.exe
#         -j "${NPROC}"
#         --with-system
#         --with-iostreams
#         --with-filesystem
#         --with-thread
#         --with-log
#         --with-locale
#         --with-regex
#         --with-date_time
#         "--prefix=${DESTDIR}/usr/local"
#         "address-model=${DEPS_BITS}"
#         "toolset=${DEP_BOOST_TOOLSET}"
#         link=static
#         variant=release
#         threading=multi
#         boost.locale.icu=off
#         --disable-icu
#         "${DEP_BOOST_DEBUG}" release install
#     INSTALL_COMMAND ""   # b2 does that already
# )

# ExternalProject_Add(dep_cereal
#     EXCLUDE_FROM_ALL 1
#     URL "https://github.com/USCiLab/cereal/archive/v1.2.2.tar.gz"
# #    URL_HASH SHA256=c6dd7a5701fff8ad5ebb45a3dc8e757e61d52658de3918e38bab233e7fd3b4ae
#     CMAKE_GENERATOR "${DEP_MSVC_GEN}"
#     CMAKE_GENERATOR_PLATFORM "${DEP_PLATFORM}"
#     CMAKE_ARGS
#         -DJUST_INSTALL_CEREAL=on
#         "-DCMAKE_INSTALL_PREFIX:PATH=${DESTDIR}\\usr\\local"
#     BUILD_COMMAND msbuild /m /P:Configuration=Release INSTALL.vcxproj
#     INSTALL_COMMAND ""
# )

# if (${DEPS_BITS} EQUAL 32)
#     set(DEP_LIBCURL_TARGET "x86")
# else ()
#     set(DEP_LIBCURL_TARGET "x64")
# endif ()

# ExternalProject_Add(dep_libcurl
#     EXCLUDE_FROM_ALL 1
#     URL "https://curl.haxx.se/download/curl-7.58.0.tar.gz"
#     URL_HASH SHA256=cc245bf9a1a42a45df491501d97d5593392a03f7b4f07b952793518d97666115
#     BUILD_IN_SOURCE 1
#     CONFIGURE_COMMAND ""
#     BUILD_COMMAND cd winbuild && nmake /f Makefile.vc mode=static "VC=${DEP_VS_VER}" GEN_PDB=yes DEBUG=no "MACHINE=${DEP_LIBCURL_TARGET}"
#     INSTALL_COMMAND cd builds\\libcurl-*-release-*-winssl
#         && "${CMAKE_COMMAND}" -E copy_directory include "${DESTDIR}\\usr\\local\\include"
#         && "${CMAKE_COMMAND}" -E copy_directory lib "${DESTDIR}\\usr\\local\\lib"
# )
# if (${DEP_DEBUG})
#     ExternalProject_Get_Property(dep_libcurl SOURCE_DIR)
#     ExternalProject_Add_Step(dep_libcurl build_debug
#         DEPENDEES build
#         DEPENDERS install
#         COMMAND cd winbuild && nmake /f Makefile.vc mode=static "VC=${DEP_VS_VER}" GEN_PDB=yes DEBUG=yes "MACHINE=${DEP_LIBCURL_TARGET}"
#         WORKING_DIRECTORY "${SOURCE_DIR}"
#     )
#     ExternalProject_Add_Step(dep_libcurl install_debug
#         DEPENDEES install
#         COMMAND cd builds\\libcurl-*-debug-*-winssl
#             && "${CMAKE_COMMAND}" -E copy_directory include "${DESTDIR}\\usr\\local\\include"
#             && "${CMAKE_COMMAND}" -E copy_directory lib "${DESTDIR}\\usr\\local\\lib"
#         WORKING_DIRECTORY "${SOURCE_DIR}"
#     )
# endif ()

# ExternalProject_Add(dep_qhull
#     EXCLUDE_FROM_ALL 1
#     #URL "https://github.com/qhull/qhull/archive/v7.3.2.tar.gz"
#     #URL_HASH SHA256=619c8a954880d545194bc03359404ef36a1abd2dde03678089459757fd790cb0
#     GIT_REPOSITORY  https://github.com/qhull/qhull.git
#     GIT_TAG         7afedcc73666e46a9f1d74632412ebecf53b1b30 # v7.3.2 plus the mac build patch
#     CMAKE_GENERATOR "${DEP_MSVC_GEN}"
#     CMAKE_ARGS
#         -DCMAKE_INSTALL_PREFIX=${DESTDIR}/usr/local
#         -DBUILD_SHARED_LIBS=OFF
#         -DCMAKE_POSITION_INDEPENDENT_CODE=ON
#         -DCMAKE_DEBUG_POSTFIX=d
#     BUILD_COMMAND msbuild /m /P:Configuration=Release INSTALL.vcxproj
#     INSTALL_COMMAND ""
# )

# add_debug_dep(dep_qhull)

if (${DEPS_BITS} EQUAL 32)
    set(DEP_WXWIDGETS_TARGET "")
    set(DEP_WXWIDGETS_LIBDIR "vc_lib")
else ()
    set(DEP_WXWIDGETS_TARGET "TARGET_CPU=X64")
    set(DEP_WXWIDGETS_LIBDIR "vc_x64_lib")
endif ()

find_package(Git REQUIRED)

# ExternalProject_Add(dep_blosc
#     EXCLUDE_FROM_ALL 1
#     #URL https://github.com/Blosc/c-blosc/archive/v1.17.0.zip
#     #URL_HASH SHA256=7463a1df566704f212263312717ab2c36b45d45cba6cd0dccebf91b2cc4b4da9
#     GIT_REPOSITORY https://github.com/Blosc/c-blosc.git
#     GIT_TAG e63775855294b50820ef44d1b157f4de1cc38d3e #v1.17.0
#     CMAKE_GENERATOR "${DEP_MSVC_GEN}"
#     CMAKE_GENERATOR_PLATFORM "${DEP_PLATFORM}"
#     CMAKE_ARGS
#         -DCMAKE_INSTALL_PREFIX=${DESTDIR}/usr/local
#         -DBUILD_SHARED_LIBS=OFF
#         -DCMAKE_POSITION_INDEPENDENT_CODE=ON
#         -DCMAKE_DEBUG_POSTFIX=d
#         -DBUILD_SHARED=OFF 
#         -DBUILD_STATIC=ON
#         -DBUILD_TESTS=OFF 
#         -DBUILD_BENCHMARKS=OFF 
#         -DPREFER_EXTERNAL_ZLIB=ON
#         -DBLOSC_IS_SUBPROJECT:BOOL=ON
#         -DBLOSC_INSTALL:BOOL=ON
#     PATCH_COMMAND       ${GIT_EXECUTABLE} checkout -f -- . && git clean -df && 
#                         ${GIT_EXECUTABLE} apply --whitespace=fix ${CMAKE_CURRENT_SOURCE_DIR}/blosc-mods.patch
#     BUILD_COMMAND msbuild /m /P:Configuration=Release INSTALL.vcxproj
#     INSTALL_COMMAND ""
# )

# add_debug_dep(dep_blosc)

# ExternalProject_Add(dep_openexr
#     EXCLUDE_FROM_ALL 1
#     GIT_REPOSITORY https://github.com/openexr/openexr.git
#     GIT_TAG eae0e337c9f5117e78114fd05f7a415819df413a #v2.4.0
#     CMAKE_GENERATOR "${DEP_MSVC_GEN}"
#     CMAKE_GENERATOR_PLATFORM "${DEP_PLATFORM}"
#     CMAKE_ARGS
#         -DCMAKE_INSTALL_PREFIX=${DESTDIR}/usr/local
#         -DBUILD_SHARED_LIBS=OFF
#         -DCMAKE_POSITION_INDEPENDENT_CODE=ON
#         -DBUILD_TESTING=OFF 
#         -DPYILMBASE_ENABLE:BOOL=OFF 
#         -DOPENEXR_VIEWERS_ENABLE:BOOL=OFF
#         -DOPENEXR_BUILD_UTILS:BOOL=OFF
#     BUILD_COMMAND msbuild /m /P:Configuration=Release INSTALL.vcxproj
#     INSTALL_COMMAND ""
# )

# add_debug_dep(dep_openexr)

# ExternalProject_Add(dep_openvdb
#     EXCLUDE_FROM_ALL 1
#     #URL https://github.com/AcademySoftwareFoundation/openvdb/archive/v6.2.1.zip
#     #URL_HASH SHA256=dc337399dce8e1c9f21f20e97b1ce7e4933cb0a63bb3b8b734d8fcc464aa0c48
#     GIT_REPOSITORY https://github.com/AcademySoftwareFoundation/openvdb.git
#     GIT_TAG  aebaf8d95be5e57fd33949281ec357db4a576c2e #v6.2.1
#     DEPENDS dep_blosc dep_openexr dep_tbb dep_boost
#     CMAKE_GENERATOR "${DEP_MSVC_GEN}"
#     CMAKE_GENERATOR_PLATFORM "${DEP_PLATFORM}"
#     CMAKE_ARGS
#         -DCMAKE_INSTALL_PREFIX=${DESTDIR}/usr/local
#         -DCMAKE_DEBUG_POSTFIX=d
#         -DCMAKE_PREFIX_PATH=${DESTDIR}/usr/local
#         -DBUILD_SHARED_LIBS=OFF
#         -DCMAKE_POSITION_INDEPENDENT_CODE=ON
#         -DOPENVDB_BUILD_PYTHON_MODULE=OFF 
#         -DUSE_BLOSC=ON 
#         -DOPENVDB_CORE_SHARED=OFF 
#         -DOPENVDB_CORE_STATIC=ON 
#         -DTBB_STATIC=ON
#         -DOPENVDB_BUILD_VDB_PRINT=ON
#     BUILD_COMMAND msbuild /m /P:Configuration=Release INSTALL.vcxproj
#     PATCH_COMMAND       ${GIT_EXECUTABLE} checkout -f -- . && git clean -df && 
#                         ${GIT_EXECUTABLE} apply --whitespace=fix ${CMAKE_CURRENT_SOURCE_DIR}/openvdb-mods.patch
#     INSTALL_COMMAND ""
# )

# if (${DEP_DEBUG})
#     ExternalProject_Get_Property(dep_openvdb BINARY_DIR)
#     ExternalProject_Add_Step(dep_openvdb build_debug
#         DEPENDEES build
#         DEPENDERS install
#         COMMAND ${CMAKE_COMMAND} ../dep_openvdb -DOPENVDB_BUILD_VDB_PRINT=OFF
#         COMMAND msbuild /m /P:Configuration=Debug INSTALL.vcxproj
#         WORKING_DIRECTORY "${BINARY_DIR}"
#     )
# endif ()