include_guard(GLOBAL)

if(NOT CLANG_TIDY_NAME)
  set(CLANG_TIDY_NAMES clang-tidy)
  foreach(V RANGE 9 18)
    list(INSERT CLANG_TIDY_NAMES 0 "clang-tidy-${V}")
  endforeach()
  unset(V)
else()
  set(CLANG_TIDY_NAMES ${CLANG_TIDY_NAME})
endif()

find_program(CLANG_TIDY_EXE NAMES ${CLANG_TIDY_NAMES})
unset(CLANG_TIDY_NAMES)

function(myxx_analyze_clang_tidy TARGET_NAME)
  myx_skip_external_target(${TARGET_NAME})

  if(NOT CLANG_TIDY_EXE)
    message(STATUS "MyxxCMake: Clang Tidy analyzer is not found")
    return()
  endif()

  if(TARGET ${TARGET_NAME}-analyze-clang-tidy)
    message(STATUS "MyxxCMake: target ${TARGET_NAME}-analyze-clang-tidy already exists")
    return()
  endif()

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

  set(__cmd_args -extra-arg="-Wno-unknown-warning-option ${ARG_EXTRA_ARGS}")
  get_target_property(__sources ${TARGET_NAME} SOURCES)
  foreach(iter ${__sources})
    string(FIND ${iter} ${CMAKE_BINARY_DIR} pos)
      if(pos EQUAL -1)
        list(APPEND __filtered_sources ${iter})
      endif()
  endforeach()

  if(ARG_FIX)
    list(APPEND __cmd_args "-fix-errors")
  endif()
  if(NOT TARGET myxx-analyze-clang-tidy)
    add_custom_target(myxx-analyze-clang-tidy)
  endif()
  add_custom_target(${TARGET_NAME}-analyze-clang-tidy
    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
    COMMAND ${CLANG_TIDY_EXE} ${__cmd_args} -p ${CMAKE_BINARY_DIR} ${__filtered_sources})
  add_dependencies(${TARGET_NAME}-analyze-clang-tidy ${TARGET_NAME})
  add_dependencies(myxx-analyze-clang-tidy ${TARGET_NAME}-analyze-clang-tidy)
endfunction()