include_guard(GLOBAL)

find_program(UNCRUSTIFY_EXE NAMES uncrustify)

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

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

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

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


function(myx_uncrustify target)
  set(options)
  set(oneValueArgs CONFIG)
  set(multiValueArgs)

  cmake_parse_arguments(ARG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})

  if(NOT ARG_CONFIG)
    set(ARG_CONFIG "${PROJECT_SOURCE_DIR}/.uncrustify.cfg")
    if(NOT EXISTS ${ARG_CONFIG})
      set(ARG_CONFIG "${CMAKE_SOURCE_DIR}/.uncrustify.cfg")
    endif()
  endif()

  if(NOT EXISTS ${ARG_CONFIG})
    myx_message_notify("MyxCMake: uncrustify config is not found")
    return()
  endif()

  if(NOT UNCRUSTIFY_EXE)
    myx_message_notify("MyxCMake: uncrustify executable is not found")
    return()
  endif()

  if(NOT TARGET myx-uncrustify)
    add_custom_target(myx-uncrustify)
  endif()
  if(NOT TARGET myx-uncrustify-check)
    add_custom_target(myx-uncrustify-check)
  endif()
  if(NOT TARGET myx-uncrustify-append-comments)
    add_custom_target(myx-uncrustify-append-comments)
  endif()

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

  add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/uncrustify-${target}.cfg
                     COMMAND ${UNCRUSTIFY_EXE} --update-config-with-doc
                                               -c ${ARG_CONFIG}
                                               -o ${PROJECT_BINARY_DIR}/uncrustify-${target}.cfg)
  list(APPEND UNCRUSTIFY_OPTS -c ${PROJECT_BINARY_DIR}/uncrustify-${target}.cfg)
  # cmake-format: off
  add_custom_target(${target}-uncrustify-check
    DEPENDS ${PROJECT_BINARY_DIR}/uncrustify-${target}.cfg
    COMMAND ${UNCRUSTIFY_EXE} ${UNCRUSTIFY_OPTS} --check ${__sources})

  list(APPEND UNCRUSTIFY_OPTS --replace --no-backup)
  add_custom_target(${target}-uncrustify
    DEPENDS ${PROJECT_BINARY_DIR}/uncrustify-${target}.cfg
    COMMAND ${UNCRUSTIFY_EXE} ${UNCRUSTIFY_OPTS} --mtime ${__sources})

  add_custom_target(${target}-uncrustify-append-comments
    DEPENDS ${PROJECT_BINARY_DIR}/uncrustify-${target}.cfg
    COMMAND ${UNCRUSTIFY_EXE} ${UNCRUSTIFY_OPTS}
            --set cmt_insert_class_header=${PROJECT_BINARY_DIR}/uncrustify-classheader.txt
            --set cmt_insert_file_footer=${PROJECT_BINARY_DIR}/uncrustify-filefooter.txt
            --set cmt_insert_file_header=${PROJECT_BINARY_DIR}/uncrustify-fileheader.txt
            --set cmt_insert_func_header=${PROJECT_BINARY_DIR}/uncrustify-funcheader.txt
            --set cmt_insert_before_ctor_dtor=true  --mtime ${__sources})
  # cmake-format: on

  add_dependencies(myx-uncrustify ${target}-uncrustify)
  add_dependencies(myx-uncrustify-check ${target}-uncrustify-check)
  add_dependencies(myx-uncrustify-append-comments ${target}-uncrustify-append-comments)
endfunction()