# Accepts the following variables:
#
# METIS_ROOT: Prefix where METIS is installed.
# METIS_LIB_NAME: Name of the METIS library (default: metis).
# METIS_LIBRARY: Full path of the METIS library.

# Sets the following variables:
#
# METIS_LIBRARY: Full path of the METIS library.
# METIS_FOUND: True if ParMETIS was found.
# METIS_LIBRARIES: List of all libraries needed for linking with METIS,
#
# Provides the following macros:
#
# find_package(METIS)
#
# Searches for METIS (See above)


# search metis header
find_path(METIS_INCLUDE_DIR metis.h
    PATHS ${METIS_DIR} ${METIS_ROOT}
    PATH_SUFFIXES metis include include/metis Lib METISLib
    NO_DEFAULT_PATH
    DOC "Include directory of metis")
find_path(METIS_INCLUDE_DIR metis.h
    PATH_SUFFIXES metis include include/metis Lib METISLib)

set(METIS_LIBRARY METIS_LIBRARY-NOTFOUND CACHE FILEPATH "Full path of the METIS library")

# search metis library
if(NOT METIS_LIB_NAME)
    set(METIS_LIB_NAME metis)
endif(NOT METIS_LIB_NAME)

find_library(METIS_LIBRARY ${METIS_LIB_NAME}
    PATHS ${METIS_DIR} ${METIS_ROOT}
    PATH_SUFFIXES lib
    NO_DEFAULT_PATH)
find_library(METIS_LIBRARY ${METIS_LIB_NAME}
    PATH_SUFFIXES lib
)

# behave like a CMake module is supposed to behave
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
    "METIS"
    DEFAULT_MSG
    METIS_INCLUDE_DIR
    METIS_LIBRARY
)

mark_as_advanced(METIS_INCLUDE_DIR METIS_LIBRARIES METIS_LIB_NAME)

# if both headers and library are found, store results
if(METIS_FOUND)
    set(METIS_INCLUDE_DIRS ${METIS_INCLUDE_DIR})
    set(METIS_LIBRARIES ${METIS_LIBRARY})
    # log result
    file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
        "Determing location of METIS succeded:\n"
        "Include directory: ${METIS_INCLUDE_DIRS}\n"
        "Library directory: ${METIS_LIBRARIES}\n\n")
else(METIS_FOUND)
    # log errornous result
    file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
        "Determing location of METIS failed:\n"
        "Include directory: ${METIS_INCLUDE_DIRS}\n"
        "Library directory: ${METIS_LIBRARIES}\n\n")
endif(METIS_FOUND)