# Change the following when we need a recent enough version of flexml to get the maintainer mode working
set(FLEXML_MIN_MAJOR 1)
set(FLEXML_MIN_MINOR 9)
set(FLEXML_MIN_PATCH 6)
# Change the following when we need a recent enough version of flex to get the maintainer mode working.
# Maintainer mode does NOT work with version 2.5.35!
set(FLEX_MIN_MAJOR 2)
set(FLEX_MIN_MINOR 5)
set(FLEX_MIN_PATCH 39)

# Let's generate header files required by SMPI when the call location tracing
# has been activated.
if(enable_maintainer_mode)
  if (enable_ns3)
    message(STATUS "Maintainer mode activated with ns-3, not enabling GLIBCXX_DEBUG (diable ns-3 to get it).")
  else()
    message(STATUS "Maintainer mode activated, enabling GLIBCXX_DEBUG.")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_GLIBCXX_DEBUG")
  endif()

  add_custom_command(OUTPUT ${CMAKE_HOME_DIRECTORY}/include/smpi/smpi_extended_traces.h
                            ${CMAKE_HOME_DIRECTORY}/include/smpi/smpi_extended_traces_fortran.h
    DEPENDS
    ${CMAKE_HOME_DIRECTORY}/tools/smpi/generate_smpi_defines.pl
    ${CMAKE_HOME_DIRECTORY}/include/smpi/smpi.h

    COMMENT "Generating header files for call-location tracing with SMPI"
    # Make sure there is no space after the redirection operator (>). I received
    # error messages in that case on my Debian system.
    COMMAND "${CMAKE_HOME_DIRECTORY}/tools/smpi/generate_smpi_defines.pl" "${CMAKE_HOME_DIRECTORY}/include/smpi/smpi.h >${CMAKE_HOME_DIRECTORY}/include/smpi/smpi_extended_traces.h"
    COMMAND "${CMAKE_HOME_DIRECTORY}/tools/smpi/generate_smpi_defines.pl" "-f" "${CMAKE_HOME_DIRECTORY}/include/smpi/smpi.h >${CMAKE_HOME_DIRECTORY}/include/smpi/smpi_extended_traces_fortran.h"
  )

  add_custom_target(smpi_generated_headers_call_location_tracing
    DEPENDS
    ${CMAKE_HOME_DIRECTORY}/include/smpi/smpi_extended_traces.h
    ${CMAKE_HOME_DIRECTORY}/include/smpi/smpi_extended_traces_fortran.h
  )

  SET_DIRECTORY_PROPERTIES(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES
    "${CMAKE_HOME_DIRECTORY}/include/smpi/smpi_extended_traces.h;${CMAKE_HOME_DIRECTORY}/include/smpi/smpi_extended_traces_fortran.h"
  )
endif()

if(enable_maintainer_mode)
  find_program(FLEX_EXE NAMES flex)
  find_program(FLEXML_EXE NAMES flexml)
  find_program(SED_EXE NAMES sed)
  find_program(LEX_EXE NAMES lex)

  mark_as_advanced(LEX_EXE)

  message(STATUS "Found flex: ${FLEX_EXE}")
  IF(FLEX_EXE)
    set(HAVE_FLEX 1)
    execute_process(COMMAND ${FLEX_EXE} --version OUTPUT_VARIABLE FLEX_VERSION)
    string(REGEX MATCH "[0-9]+[.]+[0-9]+[.]+[0-9]+" FLEX_VERSION "${FLEX_VERSION}")
    string(REGEX MATCH "^[0-9]+" FLEX_MAJOR_VERSION "${FLEX_VERSION}")
    string(REGEX MATCH "[0-9]+[.]+[0-9]+$" FLEX_VERSION "${FLEX_VERSION}")
    string(REGEX MATCH "^[0-9]+" FLEX_MINOR_VERSION "${FLEX_VERSION}")
    string(REGEX MATCH "[0-9]+$" FLEX_PATCH_VERSION "${FLEX_VERSION}")
  ENDIF()

  message(STATUS "Found flexml: ${FLEXML_EXE}")
  IF(FLEXML_EXE)
    set(HAVE_FLEXML 1)
    execute_process(COMMAND ${FLEXML_EXE} --version OUTPUT_VARIABLE FLEXML_VERSION)
    if (FLEXML_VERSION MATCHES "version Id:")
      message(FATAL_ERROR "You have an ancient flexml version (${FLEXML_VERSION}). You need at least v${FLEXML_MIN_MAJOR}.${FLEXML_MIN_MINOR}.${FLEXML_MIN_PATCH} to compile in maintainer mode. Upgrade your flexml, or disable the Maintainer mode option in cmake.")
    endif()

    string(REGEX MATCH "[0-9]+[.]+[0-9]+[.]+[0-9]+" FLEXML_VERSION "${FLEXML_VERSION}")
    string(REGEX MATCH "^[0-9]*" FLEXML_MAJOR_VERSION "${FLEXML_VERSION}")
    string(REGEX MATCH "[0-9]+[.]+[0-9]+$" FLEXML_VERSION "${FLEXML_VERSION}")
    string(REGEX MATCH "^[0-9]+" FLEXML_MINOR_VERSION "${FLEXML_VERSION}")
    string(REGEX MATCH "[0-9]+$" FLEXML_PATCH_VERSION "${FLEXML_VERSION}")
  ENDIF()

  message(STATUS "Found sed: ${SED_EXE}")

  if(HAVE_FLEXML AND HAVE_FLEX AND SED_EXE)

    message(STATUS "Flex version: ${FLEX_MAJOR_VERSION}.${FLEX_MINOR_VERSION}.${FLEX_PATCH_VERSION} (need at least version ${FLEX_MIN_MAJOR}.${FLEX_MIN_MINOR}.${FLEX_MIN_PATCH})")
    message(STATUS "Flexml version: ${FLEXML_MAJOR_VERSION}.${FLEXML_MINOR_VERSION}.${FLEXML_PATCH_VERSION} (need at least version ${FLEXML_MIN_MAJOR}.${FLEXML_MIN_MINOR}.${FLEXML_MIN_PATCH})")

    IF(     (${FLEXML_MAJOR_VERSION} LESS ${FLEXML_MIN_MAJOR})
        OR ((${FLEXML_MAJOR_VERSION} EQUAL ${FLEXML_MIN_MAJOR}) AND (${FLEXML_MINOR_VERSION} LESS ${FLEXML_MIN_MINOR}) )
        OR (    (${FLEXML_MAJOR_VERSION} EQUAL ${FLEXML_MIN_MAJOR})
	    AND (${FLEXML_MINOR_VERSION} EQUAL ${FLEXML_MIN_MINOR})
	    AND (${FLEXML_PATCH_VERSION} LESS ${FLEXML_MIN_PATCH}) ))

      message(FATAL_ERROR "Your flexml version is too old to compile in maintainer mode (need at least v${FLEXML_MIN_MAJOR}.${FLEXML_MIN_MINOR}.${FLEXML_MIN_PATCH}). Upgrade your flexml, or disable the Maintainer mode option in cmake.")

    ENDIF()

    IF(     (${FLEX_MAJOR_VERSION} LESS ${FLEX_MIN_MAJOR})
        OR ((${FLEX_MAJOR_VERSION} EQUAL ${FLEX_MIN_MAJOR}) AND (${FLEX_MINOR_VERSION} LESS ${FLEX_MIN_MINOR}) )
        OR (    (${FLEX_MAJOR_VERSION} EQUAL ${FLEX_MIN_MAJOR})
	    AND (${FLEX_MINOR_VERSION} EQUAL ${FLEX_MIN_MINOR})
	    AND (${FLEX_PATCH_VERSION} LESS ${FLEX_MIN_PATCH}) ))

        message(FATAL_ERROR "Your flex version is too old to compile in maintainer mode (need at least v${FLEX_MIN_MAJOR}.${FLEX_MIN_MINOR}.${FLEX_MIN_PATCH}). Upgrade your flex, or disable the Maintainer mode option in cmake (run 'ccmake').")

    ENDIF()

    set(string1  "'s/extern /XBT_PUBLIC_DATA /'")
    set(string2  "'s/XBT_PUBLIC_DATA \\([^(]*\\)(/XBT_PUBLIC \\1(/'")
    set(string3  "'s/XBT_PUBLIC void STag_simgrid_parse_include/XBT_ATTRIB_NORETURN &/'") # remove with v5 of the dtd
    set(string4  "'s/XBT_PUBLIC void STag_simgrid_parse_\\(mount\\|storage\\)/XBT_ATTRIB_NORETURN &/'") # remove with v5 of the dtd
    set(string5  "'s/SET(DOCTYPE)/SET(ROOT_dax__adag)/'")
    set(string14 "'\\!^ \\* Generated [0-9/]\\{10\\} [0-9:]\\{8\\}\\.$$!d'")

    ADD_CUSTOM_COMMAND(
      OUTPUT 	${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid_dtd.h
                ${CMAKE_HOME_DIRECTORY}/src/dag/dax_dtd.h
                ${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid_dtd.c
                ${CMAKE_HOME_DIRECTORY}/src/dag/dax_dtd.c

      DEPENDS	${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid.dtd
                ${CMAKE_HOME_DIRECTORY}/src/dag/dax.dtd

      #${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid_dtd.l: ${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid.dtd
      COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_HOME_DIRECTORY}/src/kernel/xml
      COMMAND ${FLEXML_EXE} --root-tags platform -b 1000000 -P simgrid_parse --sysid=https://simgrid.org/simgrid.dtd -S src/kernel/xml/simgrid_dtd.l -L src/kernel/xml/simgrid.dtd
      COMMAND ${PERL_EXE} ${CMAKE_HOME_DIRECTORY}/tools/cmake/scripts/fixup_simgrid_dtd_l.pl < src/kernel/xml/simgrid_dtd.l > src/kernel/xml/simgrid_dtd.l.tmp
      COMMAND mv src/kernel/xml/simgrid_dtd.l.tmp src/kernel/xml/simgrid_dtd.l
      COMMAND ${CMAKE_COMMAND} -E echo "       Generated src/kernel/xml/simgrid_dtd.l"

      #${CMAKE_HOME_DIRECTORY}/src/dag/dax_dtd.l: ${CMAKE_HOME_DIRECTORY}/src/dag/dax.dtd
      COMMAND ${FLEXML_EXE} -b 1000000 --root-tags adag -P dax_ --sysid=dax.dtd -S src/dag/dax_dtd.l -L src/dag/dax.dtd
      COMMAND ${SED_EXE} -i ${string5} src/dag/dax_dtd.l
      COMMAND ${SED_EXE} -i ${string14} src/dag/dax_dtd.l
      COMMAND ${CMAKE_COMMAND} -E echo "       Generated src/dag/dax_dtd.l"

      #${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid_dtd.h: ${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid.dtd
      COMMAND ${FLEXML_EXE} --root-tags platform -P simgrid_parse --sysid=https://simgrid.org/simgrid.dtd -H src/kernel/xml/simgrid_dtd.h -L src/kernel/xml/simgrid.dtd
      COMMAND ${SED_EXE} -i ${string1} src/kernel/xml/simgrid_dtd.h
      COMMAND ${SED_EXE} -i ${string2} src/kernel/xml/simgrid_dtd.h
      COMMAND ${SED_EXE} -i ${string3} src/kernel/xml/simgrid_dtd.h
      COMMAND ${SED_EXE} -i ${string4} src/kernel/xml/simgrid_dtd.h
      COMMAND ${SED_EXE} -i ${string14} src/kernel/xml/simgrid_dtd.h
      COMMAND ${CMAKE_COMMAND} -E echo "       Generated src/kernel/xml/simgrid_dtd.h"

      #${CMAKE_HOME_DIRECTORY}/src/dag/dax_dtd.h: ${CMAKE_HOME_DIRECTORY}/src/dag/dax.dtd
      COMMAND ${CMAKE_COMMAND} -E remove -f ${CMAKE_HOME_DIRECTORY}/src/dag/dax_dtd.h
      COMMAND ${FLEXML_EXE} --root-tags adag -P dax_ --sysid=dax.dtd -H src/dag/dax_dtd.h -L src/dag/dax.dtd
      COMMAND ${SED_EXE} -i ${string1} src/dag/dax_dtd.h
      COMMAND ${SED_EXE} -i ${string2} src/dag/dax_dtd.h
      COMMAND ${SED_EXE} -i ${string14} src/dag/dax_dtd.h
      COMMAND ${CMAKE_COMMAND} -E echo "       Generated src/dag/dax_dtd.h"

      #kernel/xml/simgrid_dtd.c: kernel/xml/simgrid_dtd.l
      COMMAND ${CMAKE_COMMAND} -E remove -f ${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid_dtd.c
      COMMAND ${FLEX_EXE} -o src/kernel/xml/simgrid_dtd.c -Psimgrid_parse_ --noline src/kernel/xml/simgrid_dtd.l
      COMMAND ${CMAKE_COMMAND} -E echo "       Generated kernel/xml/simgrid_dtd.c"

      #dag/dax_dtd.c: dag/dax_dtd.l
      COMMAND ${CMAKE_COMMAND} -E remove -f ${CMAKE_HOME_DIRECTORY}/src/dag/dax_dtd.c
      COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_HOME_DIRECTORY}/src/dag
      COMMAND ${FLEX_EXE} -o src/dag/dax_dtd.c -Pdax_ --noline src/dag/dax_dtd.l
      COMMAND ${CMAKE_COMMAND} -E echo "       Generated src/dag/dax_dtd.c"

      WORKING_DIRECTORY ${CMAKE_HOME_DIRECTORY}
      COMMENT "Generating files in maintainer mode..."
      )

  else()
    if(NOT HAVE_FLEXML)
      message(STATUS "Error : Install flexml to use the maintainer mode.")
    endif()
    if(NOT HAVE_FLEX)
      message(STATUS "Error : Install flex to use the maintainer mode.")
    endif()
    if(NOT SED_EXE)
      message(STATUS "Error : Install sed before use maintainer mode.")
    endif()

    message(FATAL_ERROR STATUS "Error : Need to install all (flexml, flex, sed) tools for maintainer mode !!!")
  endif()

endif()

add_custom_target(maintainer_files
  DEPENDS ${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid_dtd.h
          ${CMAKE_HOME_DIRECTORY}/src/kernel/xml/simgrid_dtd.c
          ${CMAKE_HOME_DIRECTORY}/src/dag/dax_dtd.h
          ${CMAKE_HOME_DIRECTORY}/src/dag/dax_dtd.c
  )