#################################################################
# HEADER
#################################################################
CMAKE_MINIMUM_REQUIRED(VERSION 2.8.7)
SET(CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS TRUE)

PROJECT(FLAP Fortran)

SET(${PROJECT_NAME}_VERSION 0.0.1)
SET(${PROJECT_NAME}_SOVERSION 1)
SET(LIB ${PROJECT_NAME})

SET(CMAKE_VERBOSE_MAKEFILE TRUE)

#################################################################
# DEFINE PATHS
#################################################################

SET(CMAKE_PATH ${CMAKE_SOURCE_DIR}/CMake)
SET(SRC_PATH ${CMAKE_SOURCE_DIR}/src)
SET(LIB_PATH ${SRC_PATH}/lib)
SET(TESTS_PATH ${SRC_PATH}/tests)
SET(THIRDPARTY_PATH ${SRC_PATH}/third_party)

#SET(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/CMake/Modules/")


#################################################################
# BUILD PATHS
#################################################################

SET(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib)
SET(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
SET(CMAKE_Fortran_MODULE_DIRECTORY ${PROJECT_BINARY_DIR}/modules)
SET(MODULE_OUTPUT_PATH ${CMAKE_Fortran_MODULE_DIRECTORY})
SET(THIRDPARTY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/third_party)
INCLUDE_DIRECTORIES(${CMAKE_Fortran_MODULE_DIRECTORY})

#################################################################
# ADD INCLUDE DIRS
#################################################################

SET(${PROJECT_NAME}_INCLUDE_DIRS ${MODULE_OUTPUT_PATH})

#################################################################
# CONFIGURATION TYPES & BUILD MODE
#################################################################

SET(CMAKE_CONFIGURATION_TYPES DEBUG RELEASE)
IF(NOT CMAKE_BUILD_TYPE)
  SET(CMAKE_BUILD_TYPE DEBUG CACHE STRING
      "Choose the type of build, options are: NONE DEBUG RELEASE"
      FORCE)

  SET_PROPERTY(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS NONE DEBUG RELEASE)
ENDIF(NOT CMAKE_BUILD_TYPE)

IF(NOT ${PROJECT_NAME}_ENABLE_TESTS)
    OPTION(${PROJECT_NAME}_ENABLE_TESTS "Enable/disable tests compilation" OFF)
ENDIF(NOT ${PROJECT_NAME}_ENABLE_TESTS)

#################################################################
# STATIC LIBRARIES
#################################################################
# Try to search first static libraries
IF(NOT ${BUILD_SHARED_LIBS})
    SET(CMAKE_FIND_LIBRARY_SUFFIXES ".a ${CMAKE_FIND_LIBRARY_SUFFIXES}")
    SET( HDF5_USE_STATIC_LIBRARIES ON)
ENDIF()


#################################################################
# FFLAGS depend on the compiler and the build type
#################################################################

GET_FILENAME_COMPONENT(Fortran_COMPILER_NAME ${CMAKE_Fortran_COMPILER} NAME)

IF(CMAKE_BUILD_TYPE STREQUAL "DEBUG")
#   SET(MACROS "${MACROS} -DDEBUG -Dmemcheck")
    ADD_DEFINITIONS(-DDEBUG)
    ADD_DEFINITIONS(-Dmemcheck)
ENDIF()

ADD_DEFINITIONS(-D${CMAKE_Fortran_COMPILER_ID})

message(STATUS "COMPILER INFO: ${CMAKE_Fortran_COMPILER_ID} - ${Fortran_COMPILER_NAME}")

IF (${CMAKE_Fortran_COMPILER_ID} STREQUAL "GNU" OR Fortran_COMPILER_NAME MATCHES "gfortran*")
  # gfortran 
  set(FORTRAN_FLAGS "-fdefault-real-8 -ffree-line-length-0 -cpp -Wimplicit-interface ${EXTRA_FLAGS} ")
  set (CMAKE_Fortran_FLAGS "${FORTRAN_FLAGS} ${MACROS} ${INCLUDES} " CACHE STRING "" FORCE)
  set (CMAKE_Fortran_FLAGS_RELEASE "-O3 ${EXTRA_FLAGS} " CACHE STRING "" FORCE)
  set (CMAKE_Fortran_FLAGS_DEBUG   "-g -fbacktrace -fbounds-check -fprofile-arcs -ftest-coverage -Wimplicit-interface ${EXTRA_FLAGS} " CACHE STRING "" FORCE)
ELSEIF (${CMAKE_Fortran_COMPILER_ID} STREQUAL "Intel" OR Fortran_COMPILER_NAME MATCHES "ifort*")
  # ifort (untested)
  set(FORTRAN_FLAGS "-r8 -fpp -W1 ${EXTRA_FLAGS} ")
  set (CMAKE_Fortran_FLAGS "${FORTRAN_FLAGS} ${MACROS} ${INCLUDES}" CACHE STRING "" FORCE)
  set (CMAKE_Fortran_FLAGS_RELEASE "-O3 ${EXTRA_FLAGS} " CACHE STRING "" FORCE)
  set (CMAKE_Fortran_FLAGS_DEBUG   "-O0 -traceback -g -debug all -check all -ftrapuv -warn nointerfaces ${EXTRA_FLAGS} " CACHE STRING "" FORCE)
# A partir de CMake 3.1
# -prof-gen:srcpos -prof-dir${PROJECT_BINARY_DIR}

ELSEIF (${CMAKE_Fortran_COMPILER_ID} STREQUAL "XL" OR Fortran_COMPILER_NAME MATCHES "xlf*")
  # xlf (untested)
  set(FORTRAN_FLAGS "-q64 -qrealsize=8 -qsuffix=f=f90:cpp=f90 -qxlf2003=polymorphic -Wl,-dy ${EXTRA_FLAGS} ")
  set (CMAKE_Fortran_FLAGS "${FORTRAN_FLAGS} ${MACROS} ${INCLUDES}" CACHE STRING "" FORCE)
  set (CMAKE_Fortran_FLAGS_RELEASE "-O3 -qstrict ${EXTRA_FLAGS} " CACHE STRING "" FORCE)
  set (CMAKE_Fortran_FLAGS_DEBUG   "-O0 -g -qfullpath -qkeepparm ${EXTRA_FLAGS} " CACHE STRING "" FORCE)
ELSE ()
  message ("No optimized Fortran compiler flags are known, we just try -O2...")
  set (CMAKE_Fortran_FLAGS_RELEASE "-O2")
  set (CMAKE_Fortran_FLAGS_DEBUG   "-O0 -g")
ENDIF ()

SET(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,--allow-multiple-definition")
SET(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,--allow-multiple-definition")

message (STATUS "CMAKE_Fortran_COMPILER full path: " ${CMAKE_Fortran_COMPILER})
message (STATUS "CMAKE_Fortran_FLAGS: " ${CMAKE_Fortran_FLAGS})
message (STATUS "CMAKE_Fortran_FLAGS_RELEASE: " ${CMAKE_Fortran_FLAGS_RELEASE})
message (STATUS "CMAKE_Fortran_FLAGS_DEBUG: " ${CMAKE_Fortran_FLAGS_DEBUG})

#################################################################
# ENABLE TESTING
#################################################################

SET(BUILDNAME ${CMAKE_Fortran_COMPILER_ID}_${CMAKE_BUILD_TYPE}_MKL=${${PROJECT_NAME}_ENABLE_MKL} CACHE STRING "" )
IF(${PROJECT_NAME}_ENABLE_TESTS)
    ENABLE_TESTING()
    INCLUDE(CTest)
ENDIF()

#################################################################
# Add external projects
#################################################################

include(ExternalProject)
SET(PENF_LIB PENF)

SET(${PENF_LIB}_SRC_PATH ${THIRDPARTY_PATH}/PENF)
MESSAGE("${PENF_LIB}_SRC_PATH: ${${PENF_LIB}_SRC_PATH}") 
SET(${PENF_LIB}_BINARY_PATH ${THIRDPARTY_OUTPUT_PATH}/${PENF_LIB})
EXTERNALPROJECT_Add(${PENF_LIB}
    DOWNLOAD_COMMAND ""
    SOURCE_DIR ${${PENF_LIB}_SRC_PATH}
    BINARY_DIR ${${PENF_LIB}_BINARY_PATH}
    INSTALL_DIR ${INSTALL_PREFIX}
    # Fortran compiler must be forced in order to link external projects from the main project
    CONFIGURE_COMMAND cmake -DBUILD_SHARED_LIBS=${BUILD_SHARED_LIBS} -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE} -DCMAKE_Fortran_COMPILER=${CMAKE_Fortran_COMPILER} ${${PENF_LIB}_SRC_PATH}
    BUILD_COMMAND cmake --build .
    TEST_COMMAND ""
    INSTALL_COMMAND ""
)

# The order of the libraries reveals the right linking order
SET(PENF_LIBS ${${PENF_LIB}_BINARY_PATH}/lib/lib${PENF_LIB}.a)
LINK_DIRECTORIES(${THIRDPARTY_OUTPUT_PATH}/${PENF_LIB}/lib)
INCLUDE_DIRECTORIES(${THIRDPARTY_OUTPUT_PATH}/${PENF_LIB}/modules)
SET(${PROJECT_NAME}_INCLUDE_DIRS ${${PROJECT_NAME}_INCLUDE_DIRS} ${THIRDPARTY_OUTPUT_PATH}/${PENF_LIB}/modules)

#################################################################
# ADD SOURCE SUBDIRS
#################################################################

ADD_SUBDIRECTORY(${LIB_PATH})
IF(${PROJECT_NAME}_ENABLE_TESTS)
    ADD_SUBDIRECTORY(${TESTS_PATH})
ENDIF()

#################################################################
# CREATE CONFIG FILE
#################################################################

CONFIGURE_FILE(${CMAKE_PATH}/${PROJECT_NAME}Config.cmake.in 
               ${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake
               @ONLY)