cmake_minimum_required (VERSION 2.6)

# Set project name
project (mrmc CXX C)

# Set the version number
set (MRMC_CPP_VERSION_MAJOR 1)
set (MRMC_CPP_VERSION_MINOR 0)

# Set all GTest references to the version in the repository and show it as output
set (GTEST_INCLUDE_DIR resources/3rdparty/gtest-1.6.0/include)
set (GTEST_LIBRARY ${PROJECT_SOURCE_DIR}/resources/3rdparty/gtest-1.6.0/libgtest.a)
set (GTEST_MAIN_LIBRARY ${PROJECT_SOURCE_DIR}/resources/3rdparty/gtest-1.6.0/libgtest_main.a)
message(STATUS "GTEST_INCLUDE_DIR is ${GTEST_INCLUDE_DIR}")
message(STATUS "GTEST_LIBRARY is ${GTEST_LIBRARY}")
message(STATUS "GTEST_MAIN_LIBRARY is ${GTEST_MAIN_LIBRARY}")

# Set all log4cplus references the version in the repository
set (LOG4CPLUS_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/resources/3rdparty/log4cplus-1.1.0/include)
set (LOG4CPLUS_LIBRARY ${PROJECT_SOURCE_DIR}/resources/3rdparty/log4cplus-1.1.0/src/liblog4cplus.a)
message(STATUS "LOG4CPLUS_INCLUDE_DIR is ${LOG4CPLUS_INCLUDE_DIR}")
message(STATUS "LOG4CPLUS_LIBRARY is ${LOG4CPLUS_LIBRARY}")

# Set all Eigen references the version in the repository
set(EIGEN3_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/resources/3rdparty/eigen)
message(STATUS "EIGEN3_INCLUDE_DIR is ${EIGEN3_INCLUDE_DIR}")

# Set all Eigen references the version in the repository
set(GMMXX_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/resources/3rdparty/gmm-4.2/include)
message(STATUS "GMMXX_INCLUDE_DIR is ${GMMXX_INCLUDE_DIR}")

# Now define all available custom options
option(DEBUG "Sets whether the DEBUG mode is used" ON)
option(USE_POPCNT "Sets whether the popcnt instruction is going to be used." ON)
option(USE_BOOST_STATIC_LIBRARIES "Sets whether the Boost libraries should be linked statically." ON)

# If the DEBUG option was turned on, we will target a debug version and a release version otherwise
if (DEBUG)
    set (CMAKE_BUILD_TYPE "DEBUG")
    message(STATUS "Building DEBUG version.")
else()
    set (CMAKE_BUILD_TYPE "RELEASE")
    message(STATUS "Building RELEASE version.")
endif()

if(CMAKE_COMPILER_IS_GNUCC)
    # Set standard flags for GCC
    set (CMAKE_CXX_FLAGS "-std=c++0x -Wall -Werror -pedantic")
    
    # Turn on popcnt instruction if possible (yes by default)
    if (USE_POPCNT)
        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mpopcnt")
    endif(USE_POPCNT)
elseif(MSVC)

else(CLANG)
    # Set standard flags for GCC
    set (CMAKE_CXX_FLAGS "-std=c++11 -stdlib=libc++ -Wall -Werror -pedantic -Wno-unused-variable")
    
    # Turn on popcnt instruction if desired (yes by default)
    if (USE_POPCNT)
        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mpopcnt")
    endif(USE_POPCNT)    
endif()

# Add the binary folder to the search path for include files so that we will find mrmc-config.h
include_directories("${PROJECT_BINARY_DIR}")

# Base path for test files
set(MRMC_CPP_TESTS_BASE_PATH ${PROJECT_SOURCE_DIR}/test)
message(STATUS "MRMC_CPP_TESTS_BASE_PATH is ${MRMC_CPP_TESTS_BASE_PATH}")

# Main Sources
file(GLOB_RECURSE MRMC_HEADERS ${PROJECT_SOURCE_DIR}/src/*.h)
file(GLOB_RECURSE MRMC_SOURCES ${PROJECT_SOURCE_DIR}/src/*.cpp)

# Test Sources
# Note that the tests also need the source files, except for the main file
file(GLOB_RECURSE MRMC_TEST_HEADERS ${PROJECT_SOURCE_DIR}/test/*.h)
file(GLOB_RECURSE MRMC_TEST_SOURCES ${PROJECT_SOURCE_DIR}/test/*.cpp ${PROJECT_SOURCE_DIR}/src/*/*.cpp)

# Main Grouping
source_group(Headers FILES ${MRMC_HEADERS})
source_group(Sources FILES ${MRMC_SOURCES})

# Test Grouping
source_group(Headers FILES ${MRMC_TEST_HEADERS})
source_group(Sources FILES ${MRMC_TEST_SOURCES})

# Add base folder for better inclusion paths
include_directories("${PROJECT_SOURCE_DIR}/src")

# Set required external packages
find_package(Threads REQUIRED)
find_package(Doxygen REQUIRED)
#set(Boost_USE_STATIC_LIBS        ON)
set(Boost_USE_MULTITHREADED      ON)
set(Boost_USE_STATIC_RUNTIME    OFF)
find_package(Boost REQUIRED COMPONENTS program_options)

if(Boost_FOUND)
    if ((NOT Boost_LIBRARY_DIRS) OR ("${Boost_LIBRARY_DIRS}" STREQUAL ""))
        set(Boost_LIBRARY_DIRS "${Boost_INCLUDE_DIRS}/stage/lib")
    endif ()
	
    message(STATUS "BOOST_INCLUDE_DIRS is ${Boost_INCLUDE_DIRS}")
    message(STATUS "BOOST_LIBRARY_DIRS is ${Boost_LIBRARY_DIRS}")
	
    include_directories(${Boost_INCLUDE_DIRS})
	link_directories(${Boost_LIBRARY_DIRS})
endif(Boost_FOUND)

# Add Eigen to the included directories
include_directories(${EIGEN3_INCLUDE_DIR})

# Add GMMXX to the included directories
include_directories(${GMMXX_INCLUDE_DIR})

# Add the executables
# Must be created *after* Boost was added because of LINK_DIRECTORIES
add_executable(mrmc ${MRMC_SOURCES} ${MRMC_HEADERS})
add_executable(mrmc-tests ${MRMC_TEST_SOURCES} ${MRMC_TEST_HEADERS})

# Add target link deps for Boost program options
target_link_libraries(mrmc ${Boost_LIBRARIES})   
target_link_libraries(mrmc-tests ${Boost_LIBRARIES})

# Add a target to generate API documentation with Doxygen
if(DOXYGEN_FOUND)
    set(CMAKE_DOXYGEN_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/doc")
    string(REGEX REPLACE ";" " " CMAKE_DOXYGEN_INPUT_LIST "${PROJECT_SOURCE_DIR}/src")

    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/doc/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)

    add_custom_target(doc ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile COMMENT "Generating API documentation with Doxygen" VERBATIM)
endif(DOXYGEN_FOUND)

if (GTEST_INCLUDE_DIR)
	# For make-based builds, defines make target named test.
	# For Visual Studio builds, defines Visual Studio project named RUN_TESTS.
	enable_testing()

	include_directories(${GTEST_INCLUDE_DIR})
	target_link_libraries(mrmc-tests ${GTEST_LIBRARY} ${GTEST_MAIN_LIBRARY})

	add_test(NAME mrmc-tests COMMAND mrmc-tests)
	if(MSVC) # VS2012 doesn't support correctly the tuples yet
		add_definitions( /D _VARIADIC_MAX=10 )
	endif()
endif(GTEST_INCLUDE_DIR)

if (LOG4CPLUS_INCLUDE_DIR)
    include_directories(${LOG4CPLUS_INCLUDE_DIR})
    target_link_libraries(mrmc ${LOG4CPLUS_LIBRARY}) 
    target_link_libraries(mrmc-tests ${LOG4CPLUS_LIBRARY})
    # On Linux, we have to link against librt
    if (UNIX AND NOT APPLE)
	   target_link_libraries(mrmc rt)
	   target_link_libraries(mrmc-tests rt)
    endif(UNIX AND NOT APPLE)
endif(LOG4CPLUS_INCLUDE_DIR)

if (THREADS_FOUND)
	include_directories(${THREADS_INCLUDE_DIRS})
    target_link_libraries (mrmc ${CMAKE_THREAD_LIBS_INIT})
	target_link_libraries (mrmc-tests ${CMAKE_THREAD_LIBS_INIT})
endif(THREADS_FOUND)

# Configure a header file to pass some of the CMake settings to the source code
configure_file (
  "${PROJECT_SOURCE_DIR}/mrmc-config.h.in"
  "${PROJECT_BINARY_DIR}/mrmc-config.h"
)

add_custom_target(memcheck valgrind --leak-check=full --show-reachable=yes ./mrmc examples/dtmc/crowds/crowds5_5.tra examples/dtmc/crowds/crowds5_5.lab)
add_custom_target(memcheck-tests valgrind --leak-check=full --show-reachable=yes ./mrmc-tests)