# Copyright (C) 1995-2019, Rene Brun and Fons Rademakers.
# All rights reserved.
#
# For the licensing terms see $ROOTSYS/LICENSE.
# For the list of contributors see $ROOTSYS/README/CREDITS.

set(CFITSIO_VERSION 4.4.0)

set(CFITSIO_PREFIX ${CMAKE_BINARY_DIR}/CFITSIO-prefix)
set(CFITSIO_LIBRARIES ${CFITSIO_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}cfitsio${CMAKE_STATIC_LIBRARY_SUFFIX})

if(NOT WIN32)
  set(CFITSIO_C_FLAGS -fPIC)
endif()

if(WIN32 AND NOT CMAKE_GENERATOR MATCHES Ninja)
  if(winrtdebug)
    set(CFITSIO_BUILD_COMMAND_FLAGS "--config Debug")
  else()
    set(CFITSIO_BUILD_COMMAND_FLAGS "--config Release")
  endif()
endif()

ExternalProject_Add(
  BUILTIN_CFITSIO
  PREFIX ${CFITSIO_PREFIX}
  URL https://lcgpackages.web.cern.ch/tarFiles/sources/cfitsio-${CFITSIO_VERSION}.tar.gz
  URL_HASH SHA256=95900cf95ae760839e7cb9678a7b2fad0858d6ac12234f934bd1cb6bfc246ba9
  CMAKE_ARGS -G ${CMAKE_GENERATOR}
             -DCMAKE_POLICY_VERSION_MINIMUM=3.5
             -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
             -DCMAKE_C_FLAGS=${CFITSIO_C_FLAGS}
             -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
             -DCMAKE_INSTALL_LIBDIR=<INSTALL_DIR>/lib
             -DBUILD_SHARED_LIBS=OFF
             -DUSE_CURL=OFF
             -DZLIB_FOUND=TRUE
             -DZLIB_INCLUDE_DIR=${ZLIB_INCLUDE_DIRS}
             -DZLIB_LIBRARIES=$<TARGET_FILE:ZLIB::ZLIB>
  # Skip the find_package(ZLIB REQUIRED), because we feed CFITSIO our own ZLIB flags.
  PATCH_COMMAND git apply --ignore-space-change --ignore-whitespace
                ${CMAKE_CURRENT_SOURCE_DIR}/cfitsio-no-find-zlib.diff
                ${CMAKE_CURRENT_SOURCE_DIR}/no-fortran-wrapper.diff
  BUILD_COMMAND ${CMAKE_COMMAND} --build . ${CFITSIO_BUILD_COMMAND_FLAGS}
  INSTALL_COMMAND ${CMAKE_COMMAND} --build . ${CFITSIO_BUILD_COMMAND_FLAGS} --target install
  LOG_DOWNLOAD 1 LOG_CONFIGURE 1 LOG_BUILD 1 LOG_INSTALL 1 LOG_OUTPUT_ON_FAILURE 1
  BUILD_BYPRODUCTS ${CFITSIO_LIBRARIES}
  TIMEOUT 600
)

add_dependencies(BUILTIN_CFITSIO ZLIB::ZLIB)

add_dependencies(CFITSIO::CFITSIO BUILTIN_CFITSIO)
set(CFITSIO_INCLUDE_DIRS ${CFITSIO_PREFIX}/include)
file(MAKE_DIRECTORY ${CFITSIO_INCLUDE_DIRS})
set_target_properties(CFITSIO::CFITSIO PROPERTIES
    IMPORTED_LOCATION ${CFITSIO_LIBRARIES}
    INTERFACE_INCLUDE_DIRECTORIES ${CFITSIO_INCLUDE_DIRS}
    INTERFACE_LINK_LIBRARIES ZLIB::ZLIB
)