# Copyright (C) 2007-2013  CEA/DEN, EDF R&D, OPEN CASCADE
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
#
# See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
#

# ------

MESSAGE(STATUS "Check for metis ...")

# ------

IF(METIS_IS_MANDATORY STREQUAL 0)
  SET(METIS_IS_MANDATORY 0)
  SET(METIS_IS_OPTIONAL 1)
ENDIF(METIS_IS_MANDATORY STREQUAL 0)
IF(METIS_IS_OPTIONAL STREQUAL 0)
  SET(METIS_IS_MANDATORY 1)
  SET(METIS_IS_OPTIONAL 0)
ENDIF(METIS_IS_OPTIONAL STREQUAL 0)
IF(NOT METIS_IS_MANDATORY AND NOT METIS_IS_OPTIONAL)
  SET(METIS_IS_MANDATORY 0)
  SET(METIS_IS_OPTIONAL 1)
ENDIF(NOT METIS_IS_MANDATORY AND NOT METIS_IS_OPTIONAL)

# ------

SET(MED_ENABLE_METIS 1)
IF(WITHOUT_METIS OR WITH_METIS STREQUAL 0)
  SET(MED_ENABLE_METIS 0)
  MESSAGE(STATUS "metis disabled from command line.")
ENDIF(WITHOUT_METIS OR WITH_METIS STREQUAL 0)

# ------

IF(MED_ENABLE_METIS)
  IF(WITH_METIS)
    SET(METIS_ROOT_USER ${WITH_METIS})
  ENDIF(WITH_METIS)
  IF(NOT METIS_ROOT_USER)
    SET(METIS_ROOT_USER $ENV{METISDIR})
  ENDIF(NOT METIS_ROOT_USER)
  IF(NOT METIS_ROOT_USER)
    SET(METIS_ROOT_USER $ENV{METIS_ROOT})
  ENDIF(NOT METIS_ROOT_USER)
  IF(NOT METIS_ROOT_USER)
    SET(METIS_ROOT_USER $ENV{METISHOME})
  ENDIF(NOT METIS_ROOT_USER)
ENDIF(MED_ENABLE_METIS)

# ------

IF(MED_ENABLE_METIS)
  IF(NOT METIS_ROOT_USER)
    FIND_PROGRAM(METIS_MAINBINARY pmetis)
    IF(METIS_MAINBINARY)
      MESSAGE(STATUS "metis found: ${METIS_MAINBINARY}")
      IF(METIS_MAINBINARY STREQUAL /usr/bin/pmetis)
      ELSE(METIS_MAINBINARY STREQUAL /usr/bin/pmetis)
	SET(METIS_ROOT_USER ${METIS_MAINBINARY})
	GET_FILENAME_COMPONENT(METIS_ROOT_USER ${METIS_ROOT_USER} PATH)
      ENDIF(METIS_MAINBINARY STREQUAL /usr/bin/pmetis)
    ELSE(METIS_MAINBINARY)
      MESSAGE(STATUS "metis not found, try to use WITH_METIS option or METIS_ROOT (or METISHOME or METISDIR) environment variable")
      SET(MED_ENABLE_METIS 0)
    ENDIF(METIS_MAINBINARY)
  ENDIF(NOT METIS_ROOT_USER)
ENDIF(MED_ENABLE_METIS)

# ------

IF(MED_ENABLE_METIS)
  IF(METIS_ROOT_USER)
    SET(METIS_FIND_PATHS_OPTION NO_DEFAULT_PATH)
  ELSE(METIS_ROOT_USER)
    SET(METIS_FIND_PATHS_OPTION)
  ENDIF(METIS_ROOT_USER)
ENDIF(MED_ENABLE_METIS)

# ------

IF(MED_ENABLE_METIS)
  IF(METIS_ROOT_USER)
    SET(METIS_INCLUDE_PATHS ${METIS_ROOT_USER}/Lib)
  ELSE(METIS_ROOT_USER)
    SET(METIS_INCLUDE_PATHS)
  ENDIF(METIS_ROOT_USER)
  SET(METIS_INCLUDE_TO_FIND metis.h)
  FIND_PATH(METIS_INCLUDE_DIR ${METIS_INCLUDE_TO_FIND} PATHS ${METIS_INCLUDE_PATHS} ${METIS_FIND_PATHS_OPTION})
  SET(METIS_DEFINITIONS)
  IF(METIS_INCLUDE_DIR)
    IF(METIS_ROOT_USER)
      SET(METIS_INCLUDES -I${METIS_INCLUDE_DIR})#to remove
      SET(METIS_INCLUDE_DIRS ${METIS_INCLUDE_DIR})
    ENDIF(METIS_ROOT_USER)
    SET(METIS_INCLUDES -D_METISUSEDLL_ ${METIS_INCLUDES})#to remove
    SET(METIS_DEFINITIONS "${METIS_DEFINITIONS} -D_METISUSEDLL_")
    MESSAGE(STATUS "${METIS_INCLUDE_TO_FIND} found in ${METIS_INCLUDE_DIR}")
  ELSE(METIS_INCLUDE_DIR)
    SET(MED_ENABLE_METIS 0)
    IF(METIS_ROOT_USER)
      MESSAGE(STATUS "${METIS_INCLUDE_TO_FIND} not found in ${METIS_INCLUDE_PATHS}, check your METIS installation.")
    ELSE(METIS_ROOT_USER)
      MESSAGE(STATUS "${METIS_INCLUDE_TO_FIND} not found on system, try to use WITH_METIS option or METIS_ROOT (or METISHOME or METISDIR) environment variable.")
    ENDIF(METIS_ROOT_USER)
  ENDIF(METIS_INCLUDE_DIR)
ENDIF(MED_ENABLE_METIS)

# ----

IF(MED_ENABLE_METIS)
  IF(METIS_ROOT_USER)
    IF(WINDOWS)
      SET(METIS_LIB_PATHS ${METIS_ROOT_USER}/dll ${METIS_ROOT_USER}/lib)
    ELSE(WINDOWS)
      SET(METIS_LIB_PATHS ${METIS_ROOT_USER})
    ENDIF(WINDOWS)
  ELSE(METIS_ROOT_USER)
    SET(METIS_LIB_PATHS)
  ENDIF(METIS_ROOT_USER)
  IF(WINDOWS)
    IF(CMAKE_BUILD_TYPE STREQUAL Release)
      FIND_LIBRARY(METIS_LIB metisdll PATHS ${METIS_LIB_PATHS} ${METIS_FIND_PATHS_OPTION})
    ELSE(CMAKE_BUILD_TYPE STREQUAL Release)
      FIND_LIBRARY(METIS_LIB metisddll PATHS ${METIS_LIB_PATHS} ${METIS_FIND_PATHS_OPTION})
    ENDIF(CMAKE_BUILD_TYPE STREQUAL Release)
  ELSE(WINDOWS)
    FIND_LIBRARY(METIS_LIB metis PATHS ${METIS_LIB_PATHS} ${METIS_FIND_PATHS_OPTION})
  ENDIF(WINDOWS)
  SET(METIS_LIBS)
  IF(METIS_LIB)
    SET(METIS_LIBS ${METIS_LIBS} ${METIS_LIB})
    MESSAGE(STATUS "metis lib found: ${METIS_LIB}")
  ELSE(METIS_LIB)
    SET(MED_ENABLE_METIS 0)
    IF(METIS_ROOT_USER)
      MESSAGE(STATUS "metis lib not found in ${METIS_LIB_PATHS}, check your METIS installation.")
    ELSE(METIS_ROOT_USER)
      MESSAGE(STATUS "metis lib not found on system, try to use WITH_METIS option or METIS_ROOT (or METISHOME or METISDIR) environment variable.")
    ENDIF(METIS_ROOT_USER)
  ENDIF(METIS_LIB)
ENDIF(MED_ENABLE_METIS)

# ----

IF(MED_ENABLE_METIS)
  SET(METIS_CPPFLAGS ${METIS_INCLUDES} -DMED_ENABLE_METIS)
  SET(METIS_DEFINITIONS "${METIS_DEFINITIONS} -DMED_ENABLE_METIS")
ELSE(MED_ENABLE_METIS)
  IF(METIS_IS_MANDATORY)
    MESSAGE(FATAL_ERROR "metis not found ... mandatory ... abort")
  ELSE(METIS_IS_MANDATORY)
    MESSAGE(STATUS "metis not found ... optional ... disabled")
  ENDIF(METIS_IS_MANDATORY)
ENDIF(MED_ENABLE_METIS)

# ------