# ----------------------------------------------------------------------------
#  CMake file for java support
# ----------------------------------------------------------------------------
if(NOT ANDROID OR NOT PYTHON_EXECUTABLE)
  ocv_module_disable(java)
endif()

set(OPENCV_MODULES_EXPORTED_TO_JAVA opencv_objdetect opencv_features2d opencv_video opencv_highgui opencv_ml opencv_calib3d CACHE STRING "List of modules exported to Java API")
mark_as_advanced(OPENCV_MODULES_EXPORTED_TO_JAVA)

set(the_description "The java bindings")
ocv_add_module(java BINDINGS opencv_core opencv_imgproc OPTIONAL ${OPENCV_MODULES_EXPORTED_TO_JAVA})

string(REPLACE "opencv_" "" OPENCV_JAVA_MODULES "${OPENCV_MODULE_${the_module}_REQ_DEPS};${OPENCV_MODULE_${the_module}_OPT_DEPS}")
foreach(module ${OPENCV_JAVA_MODULES})
  if(NOT HAVE_opencv_${module})
    list(REMOVE_ITEM OPENCV_JAVA_MODULES ${module})
  endif()
endforeach()

set(target ${the_module})
include_directories("${CMAKE_CURRENT_BINARY_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/src/cpp")

set(GEN_JAVA "${CMAKE_CURRENT_SOURCE_DIR}/gen_java.py")
set(HDR_PARSER "${CMAKE_CURRENT_SOURCE_DIR}/../python/src2/hdr_parser.py")
set(GEN_JAVADOC "${CMAKE_CURRENT_SOURCE_DIR}/gen_javadoc.py")
set(RST_PARSER "${CMAKE_CURRENT_SOURCE_DIR}/rst_parser.py")
set(CHECK_TEST_COVERAGE "${CMAKE_CURRENT_SOURCE_DIR}/check-tests.py")

# setup raw java and cpp files generation (without javadoc and at temporary location)
foreach(module ${OPENCV_JAVA_MODULES})
  # get list of module headers
  if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/config/${module}.filelist")
    file(STRINGS "${CMAKE_CURRENT_SOURCE_DIR}/config/${module}.filelist" headers_to_parse)
    set(module_cheaders "")
    set(module_cppheaders "")
    foreach(header ${headers_to_parse})
      list(APPEND module_cppheaders "${CMAKE_CURRENT_SOURCE_DIR}/../${module}/${header}")
    endforeach()
  else()
    file(GLOB module_cheaders "${CMAKE_CURRENT_SOURCE_DIR}/../${module}/include/opencv2/${module}/*.h")
    file(GLOB module_cppheaders "${CMAKE_CURRENT_SOURCE_DIR}/../${module}/include/opencv2/${module}/*.hpp")
    list(SORT module_cheaders)
    list(SORT module_cppheaders)
  endif()

  # add dependencies to cmake (we should rerun cmake if any of these headers is modified)
  foreach(header ${module_cheaders} ${module_cppheaders})
    get_filename_component(header_name "${header}" NAME_WE)
    configure_file("${header}" "${CMAKE_BINARY_DIR}/junk/${header_name}.junk" COPYONLY)
  endforeach()

  # the same about gen_java.py and hdr_parser.py
  configure_file("${GEN_JAVA}" "${CMAKE_BINARY_DIR}/junk/gen_java.junk" COPYONLY)
  configure_file("${HDR_PARSER}" "${CMAKE_BINARY_DIR}/junk/hdr_parser.junk" COPYONLY)

  # first run (to get list of generated files)
  file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/gen_java_out")
  execute_process(COMMAND ${PYTHON_EXECUTABLE} "${GEN_JAVA}" "${HDR_PARSER}" ${module} ${module_cheaders} ${module_cppheaders}
                  WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/gen_java_out"
                  OUTPUT_QUIET ERROR_QUIET)

  # create list of generated files
  file(GLOB_RECURSE generated_java_sources RELATIVE "${CMAKE_CURRENT_BINARY_DIR}/gen_java_out/" "${CMAKE_CURRENT_BINARY_DIR}/gen_java_out/*.java")
  file(REMOVE_RECURSE "${CMAKE_CURRENT_BINARY_DIR}/gen_java_out/")
    
  set(${module}_generated_java_sources)
  foreach(f ${generated_java_sources})
    list(APPEND ${module}_generated_java_sources "${CMAKE_CURRENT_BINARY_DIR}/${f}")
  endforeach()

  # second run
  add_custom_command(
        OUTPUT ${${module}_generated_java_sources}
        OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${module}.cpp"
        COMMAND ${PYTHON_EXECUTABLE} "${GEN_JAVA}" "${HDR_PARSER}" ${module} ${module_cheaders} ${module_cppheaders}
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
        DEPENDS "${GEN_JAVA}"
        DEPENDS "${HDR_PARSER}"
        DEPENDS ${module_cheaders}
        DEPENDS ${module_cppheaders}
        )
endforeach()

file(GLOB handwrittren_cpp_sources "${CMAKE_CURRENT_SOURCE_DIR}/src/cpp/*.cpp")
file(GLOB handwrittren_h_sources "${CMAKE_CURRENT_SOURCE_DIR}/src/cpp/*.h" "${CMAKE_CURRENT_SOURCE_DIR}/src/cpp/*.hpp")
file(GLOB handwrittren_java_sources "${CMAKE_CURRENT_SOURCE_DIR}/src/java/*.java")
set(generated_cpp_sources)
set(generated_java_sources)
set(documented_java_files)
set(undocumented_java_files)

foreach(jfile ${handwrittren_java_sources})
  string(REGEX REPLACE "^.*/([^+]+)\\+.*\\.java$" "\\1" jmodname "${jfile}")
  if(DEFINED HAVE_opencv_${jmodname} AND NOT HAVE_opencv_${jmodname})
    list(REMOVE_ITEM handwrittren_java_sources "${jfile}")
  endif()
endforeach()

foreach(module ${OPENCV_JAVA_MODULES})
  list(APPEND generated_cpp_sources "${CMAKE_CURRENT_BINARY_DIR}/${module}.cpp")
  list(APPEND generated_java_sources ${${module}_generated_java_sources})
endforeach()

# all needed includes
foreach(module ${OPENCV_MODULE_${the_module}_DEPS})
  string(REPLACE "opencv_" "" module "${module}")
  include_directories("${CMAKE_CURRENT_SOURCE_DIR}/../${module}/include")
endforeach()

# created list of documented files targets
foreach(java_file ${handwrittren_java_sources} ${generated_java_sources})
  get_filename_component(java_file_name "${java_file}" NAME_WE)
  if(NOT java_file_name MATCHES ".*-jdoc$")
    list(APPEND documented_java_files "${CMAKE_CURRENT_BINARY_DIR}/${java_file_name}-jdoc.java")
    list(APPEND undocumented_java_files "${java_file}")
  endif()
endforeach()

# generate javadoc files
file(GLOB_RECURSE refman_rst_headers "${CMAKE_CURRENT_SOURCE_DIR}/../*.rst")
add_custom_command(
    OUTPUT ${documented_java_files}
    COMMAND ${PYTHON_EXECUTABLE} "${GEN_JAVADOC}" "${CMAKE_CURRENT_SOURCE_DIR}/src/java" "${CMAKE_CURRENT_BINARY_DIR}" 2>"${CMAKE_CURRENT_BINARY_DIR}/get_javadoc_errors.log"
    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
    DEPENDS ${undocumented_java_files}
    DEPENDS "${GEN_JAVADOC}"
    DEPENDS "${RST_PARSER}"
    DEPENDS ${refman_rst_headers}
)

# copy generated java files to the final location
set(JAVA_OUTPUT_DIR "src/org/opencv")

set(java_files)
foreach(java_file ${documented_java_files})
  get_filename_component(java_file_name "${java_file}" NAME)
  string(REPLACE "-jdoc.java" ".java" java_file_name "${java_file_name}")
  string(REPLACE "+" "/" java_file_name "${java_file_name}")

  add_custom_command(
        OUTPUT "${CMAKE_BINARY_DIR}/${JAVA_OUTPUT_DIR}/${java_file_name}"
        COMMAND ${CMAKE_COMMAND} -E copy "${java_file}" "${CMAKE_BINARY_DIR}/${JAVA_OUTPUT_DIR}/${java_file_name}"
        DEPENDS "${java_file}"
        COMMENT "Generating ${JAVA_OUTPUT_DIR}/${java_file_name}"
        )
  list(APPEND java_files "${CMAKE_BINARY_DIR}/${JAVA_OUTPUT_DIR}/${java_file_name}")
    
  if(ANDROID)
    get_filename_component(install_subdir "${java_file_name}" PATH)
    install(FILES "${CMAKE_BINARY_DIR}/${JAVA_OUTPUT_DIR}/${java_file_name}" DESTINATION ${JAVA_OUTPUT_DIR}/${install_subdir} COMPONENT main)
  endif()
endforeach()


# custom target for java API
set(api_target ${target}_api)
add_custom_target(${api_target} DEPENDS ${java_files})


# add opencv_java library
add_library(${target} SHARED ${handwrittren_h_sources} ${handwrittren_cpp_sources} ${generated_cpp_sources})
target_link_libraries(${target} ${OPENCV_MODULE_${the_module}_DEPS} ${OPENCV_LINKER_LIBS})
add_dependencies(${target} ${api_target})

# Additional target properties
set_target_properties(${target} PROPERTIES
    OUTPUT_NAME "${target}"
    ARCHIVE_OUTPUT_DIRECTORY ${LIBRARY_OUTPUT_PATH}
    RUNTIME_OUTPUT_DIRECTORY ${EXECUTABLE_OUTPUT_PATH}
    INSTALL_NAME_DIR ${OPENCV_LIB_INSTALL_PATH}
    )

install(TARGETS ${target} LIBRARY DESTINATION ${OPENCV_LIB_INSTALL_PATH} COMPONENT main)

if(ANDROID)
  target_link_libraries(${target} jnigraphics)

  # force strip library after build command
  # because samples and tests will make a copy of library before install
  add_custom_command(
        TARGET ${target}
        POST_BUILD
        COMMAND ${CMAKE_STRIP} "${LIBRARY_OUTPUT_PATH}/lib${target}.so"
        )

  set(lib_proj_files "")
  # library project blank
  file(GLOB_RECURSE android_lib_project_files "${CMAKE_CURRENT_SOURCE_DIR}/android/*")
  foreach(file ${android_lib_project_files})
    if(NOT file MATCHES "\\.svn")
      file(RELATIVE_PATH file_rel "${CMAKE_CURRENT_SOURCE_DIR}/android/" "${file}")
      add_custom_command(
                OUTPUT "${CMAKE_BINARY_DIR}/${file_rel}"
                COMMAND ${CMAKE_COMMAND} -E copy "${file}" "${CMAKE_BINARY_DIR}/${file_rel}"
                DEPENDS "${file}"
                COMMENT "Generating ${file_rel}"
                )
            
      list(APPEND lib_proj_files "${CMAKE_BINARY_DIR}/${file_rel}")

      if(NOT file_rel MATCHES "jni/.+")
        install(FILES "${CMAKE_BINARY_DIR}/${file_rel}" DESTINATION . COMPONENT main)
      endif()
    endif()
  endforeach()

  # library project jni sources
  foreach(jni_file ${handwrittren_cpp_sources} ${handwrittren_h_sources} ${generated_cpp_sources})
    get_filename_component(jni_file_name "${jni_file}" NAME)
    add_custom_command(
            OUTPUT "${CMAKE_BINARY_DIR}/jni/${jni_file_name}"
            COMMAND ${CMAKE_COMMAND} -E copy "${jni_file}" "${CMAKE_BINARY_DIR}/jni/${jni_file_name}"
            COMMAND ${CMAKE_COMMAND} -E touch "${CMAKE_BINARY_DIR}/jni/${jni_file_name}"
            DEPENDS "${jni_file}"
            COMMENT "Generating jni/${jni_file_name}"
            )
    list(APPEND lib_proj_files "${CMAKE_BINARY_DIR}/jni/${jni_file_name}")
  endforeach()    
    
  # create Android library project in build folder
  set(lib_target ${target}_android_library)
  add_custom_target(${lib_target}
        COMMAND ${CMAKE_COMMAND} -E make_directory "${CMAKE_BINARY_DIR}/res"
        COMMAND ${CMAKE_COMMAND} -E make_directory "${CMAKE_BINARY_DIR}/gen"
        DEPENDS ${lib_proj_files}
        )
  if(ANT_EXECUTABLE AND ANDROID_EXECUTABLE AND ANDROID_TOOLS_Pkg_Revision GREATER 13)
    add_custom_command(TARGET ${target}
            COMMAND ${ANDROID_EXECUTABLE} update lib-project --target "${ANDROID_SDK_TARGET}" --path "${CMAKE_BINARY_DIR}"
            COMMAND ${ANT_EXECUTABLE} debug
            WORKING_DIRECTORY "${CMAKE_BINARY_DIR}"
            DEPENDS ${lib_target}
            )
  endif()

  add_dependencies(${lib_target} ${api_target})
  add_dependencies(${target} ${lib_target})
endif(ANDROID)

#android test project
ocv_check_dependencies(${OPENCV_MODULE_${the_module}_OPT_DEPS})
if(BUILD_TESTS AND OCV_DEPENDENCIES_FOUND)
  add_android_project(opencv_test_java "${CMAKE_CURRENT_SOURCE_DIR}/android_test")

  add_custom_command(
        TARGET opencv_test_java_android_project POST_BUILD
        COMMAND ${PYTHON_EXECUTABLE} ${CHECK_TEST_COVERAGE} "${CMAKE_CURRENT_SOURCE_DIR}/android_test/src" "${CMAKE_BINARY_DIR}/src" > "${CMAKE_CURRENT_BINARY_DIR}/tests_coverage.log"
        )
endif()