find_program(UNCRUSTIFY_EXE NAMES uncrustify)

if(UNCRUSTIFY_EXE)
  if(NOT EXISTS ${CMAKE_BINARY_DIR}/uncrustify-classheader.txt)
    file(GENERATE OUTPUT ${CMAKE_BINARY_DIR}/uncrustify-classheader.txt CONTENT
"/**
 *  @class   $(fclass)
 *  @brief   TODO
 *  @details TODO
 */")
  endif()

  if(NOT EXISTS ${CMAKE_BINARY_DIR}/uncrustify-filefooter.txt)
    file(GENERATE OUTPUT ${CMAKE_BINARY_DIR}/uncrustify-filefooter.txt CONTENT
    "// EOF $(filename)")
  endif()

  if(NOT EXISTS ${CMAKE_BINARY_DIR}/uncrustify-fileheader.txt)
    file(GENERATE OUTPUT ${CMAKE_BINARY_DIR}/uncrustify-fileheader.txt CONTENT
"/**
 *  @file    $(filename)
 *  @brief   TODO
 *  @details TODO
 */")
  endif()

  if(NOT EXISTS ${CMAKE_BINARY_DIR}/uncrustify-funcheader.txt)
    file(GENERATE OUTPUT ${CMAKE_BINARY_DIR}/uncrustify-funcheader.txt CONTENT
"/**
 *  @fn $(fclass)::$(function)
 *  $(javaparam)
 *  @details TODO
 */")
  endif()
endif()


function(myx_cmake_format_sources target)

  if(UNCRUSTIFY_EXE)
    get_target_property(__sources ${target} SOURCES)
    list(FILTER __sources EXCLUDE REGEX "qrc_.*\\.cpp$")
    list(FILTER __sources EXCLUDE REGEX "moc_.*\\.cpp$")
    list(FILTER __sources EXCLUDE REGEX "ui_.*\\.h$")

    if(NOT TARGET myx-cmake-format-sources)
      add_custom_target(myx-cmake-format-sources)
    endif()
    if(NOT TARGET myx-cmake-format-sources-check)
      add_custom_target(myx-cmake-format-sources-check)
    endif()
    if(NOT TARGET myx-cmake-doc-doxygen-append-comments)
      add_custom_target(myx-cmake-doc-doxygen-append-comments)
    endif()

    if(EXISTS ${CMAKE_SOURCE_DIR}/.uncrustify.cfg)
      add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/uncrustify.cfg
                         COMMAND ${UNCRUSTIFY_EXE} --update-config-with-doc
                                                   -c ${CMAKE_SOURCE_DIR}/.uncrustify.cfg
                                                   -o ${CMAKE_BINARY_DIR}/uncrustify.cfg)
      list(APPEND UNCRUSTIFY_OPTS -c ${CMAKE_BINARY_DIR}/uncrustify.cfg)
    endif()
    # cmake-format: off
    add_custom_target(${target}-format-sources-check-uncrustify
      DEPENDS ${CMAKE_BINARY_DIR}/uncrustify.cfg
      COMMAND ${UNCRUSTIFY_EXE} ${UNCRUSTIFY_OPTS} --check ${__sources})
    list(APPEND UNCRUSTIFY_OPTS --replace --no-backup)
    add_custom_target(${target}-format-sources-uncrustify
      DEPENDS ${CMAKE_BINARY_DIR}/uncrustify.cfg
      COMMAND ${UNCRUSTIFY_EXE} ${UNCRUSTIFY_OPTS} --mtime ${__sources})

    add_custom_target(${target}-doc-doxygen-append-comments
      DEPENDS ${CMAKE_BINARY_DIR}/uncrustify.cfg
      COMMAND ${UNCRUSTIFY_EXE} ${UNCRUSTIFY_OPTS}
      --set cmt_insert_class_header=uncrustify-classheader.txt
      --set cmt_insert_file_footer=uncrustify-filefooter.txt
      --set cmt_insert_file_header=uncrustify-fileheader.txt
      --set cmt_insert_func_header=uncrustify-funcheader.txt
      --set cmt_insert_before_ctor_dtor=true ${__sources})
    # cmake-format: on
    add_dependencies(myx-cmake-format-sources ${target}-format-sources-uncrustify)
    add_dependencies(myx-cmake-format-sources-check ${target}-format-sources-check-uncrustify)
    add_dependencies(myx-cmake-doc-doxygen-append-comments ${target}-doc-doxygen-append-comments)
  else()
    message(STATUS "MyxCMake: uncrustify executable is not found")
  endif()

  find_program(DOS2UNIX_EXE NAMES dos2unix)
  if(DOS2UNIX_EXE)
    list(APPEND DOS2UNIX_OPTS -k -r)
    add_custom_target(${target}-format-sources-dos2unix COMMAND ${DOS2UNIX_EXE} ${DOS2UNIX_OPTS} ${__sources})
    add_dependencies(myx-cmake-format-sources ${target}-format-sources-dos2unix)
  else()
    message(STATUS "MyxCMake: dos2unix executable is not found")
  endif()

  if(UNIX)
    add_custom_target(${target}-format-sources-unexec COMMAND chmod -x ${__sources})
    add_dependencies(myx-cmake-format-sources ${target}-format-sources-unexec)
  endif()
endfunction()