include(UseJava) # https://cmake.org/cmake/help/latest/module/UseJava.html
set(CMAKE_SHARED_MODULE_SUFFIX ${CMAKE_SHARED_LIBRARY_SUFFIX})

if(WIN32)
  set(CMAKE_SHARED_MODULE_PREFIX "")
endif()

set(CMAKE_JNI_TARGET TRUE)
file(GLOB_RECURSE SOURCES src/*.java)
add_jar(ajar GENERATE_NATIVE_HEADERS ajar_native
  DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/include
  SOURCES ${SOURCES} OUTPUT_NAME liba
)

if(CMAKE_VERSION VERSION_LESS 3.11)
  if(WIN32)
    set(sep ";")
  else()
    set(sep ":")
  endif()

  add_custom_command(TARGET ajar POST_BUILD
    COMMAND ${Java_JAVAC_EXECUTABLE} -classpath ${sep}${CMAKE_CURRENT_SOURCE_DIR}${sep}${CMAKE_CURRENT_BINARY_DIR}
      -d ${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/ajar.dir -h ${CMAKE_CURRENT_LIST_DIR}/include
      @${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/ajar.dir/java_sources
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
  )
else()
  add_custom_command(TARGET ajar POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy_directory
    ${CMAKE_CURRENT_BINARY_DIR}/include ${CMAKE_CURRENT_LIST_DIR}/include
  )
endif()

option(LIBA_JAVADOC "Enable/Disable ffi javadoc" 0)

if(LIBA_JAVADOC)
  create_javadoc(${PROJECT_NAME} FILES ${SOURCES}
    INSTALLPATH ${CMAKE_INSTALL_DATADIR}/javadoc
  )
  add_dependencies(adoc ${PROJECT_NAME}_javadoc)
endif()

if(LIBA_FLOAT EQUAL 8)
  set(OBJECTS $<TARGET_OBJECTS:a>)
else()
  get_property(OBJECTS TARGET a PROPERTY SOURCES)
endif()

if(LIBA_CXX)
  file_scaner(SOURCES RECURSE src EXT c h cc hh cpp hpp)
else()
  file_scaner(SOURCES RECURSE src EXT c h)
endif()

add_library(ajni MODULE ${OBJECTS} ${SOURCES})
set_target_properties(ajni PROPERTIES DEFINE_SYMBOL A_EXPORTS OUTPUT_NAME a)
add_library_properties(ajni PRIVATE alib)
set_library_options(ajni)

if(CMAKE_VERSION VERSION_LESS 3.11)
  target_include_directories(ajni PRIVATE
    ${CMAKE_CURRENT_LIST_DIR}/include ${JNI_INCLUDE_DIRS}
  )
else()
  target_link_libraries(ajni PRIVATE ajar_native)
endif()

if(NOT LIBA_FLOAT EQUAL 8)
  target_compile_definitions(ajni PRIVATE A_SIZE_FLOAT=8)
endif()

if("${LIBA_INSTALL}" MATCHES "^$|[Jj]ava")
  install_jar(ajar ${CMAKE_INSTALL_DATADIR}/java)
  install(TARGETS ajni
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}/jni
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}/jni
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
  )
endif()

execute_process(COMMAND ${Java_JAVA_EXECUTABLE} -version
  OUTPUT_VARIABLE version ERROR_VARIABLE version
)
string(FIND "${version}" "64-Bit" found)

if(${found} GREATER -1)
  set(JAVA_SIZEOF_VOID_P 8) # 64
else()
  set(JAVA_SIZEOF_VOID_P 4) # 32
endif()

if(EXISTS ${CMAKE_CURRENT_LIST_DIR}/test/CMakeLists.txt AND
  CMAKE_SIZEOF_VOID_P EQUAL JAVA_SIZEOF_VOID_P AND BUILD_TESTING)
  get_property(IS_MULTI_CONFIG GLOBAL PROPERTY GENERATOR_IS_MULTI_CONFIG)

  if(NOT CMAKE_VERSION VERSION_LESS 3.0)
    set(WORKING_DIRECTORY $<TARGET_FILE_DIR:ajni>)
  elseif(IS_MULTI_CONFIG)
    set(WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>)
  else()
    set(WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
  endif()

  file(GLOB_RECURSE SOURCES src/*.java)
  add_subdirectory(test)
endif()