cmake_minimum_required(VERSION 2.8.3)

project(umurmurd C)

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
set(CMAKE_INSTALL_RPATH_USE_LINK_PATH true)

set(UMURMUR_ROOT_PATH "${CMAKE_CURRENT_LIST_DIR}")
set(UMURMUR_BINARY_DIR ${CMAKE_BINARY_DIR})

option(USE_POLARSSL_TESTCERT "Link to the PolarSSL test certificate and key." OFF)
option(USE_POLARSSL_HAVEGE "Use the PolarSSL HAVEGE random generator key." OFF)

option(USE_SHAREDMEMORY_API "Compile with Sharedmemory API support" OFF)

if(USE_POLARSSL_TESTCERT OR USE_POLARSSL_HAVEGE)
  if(SSL MATCHES "openssl" OR SSL MATCHES "gnutls")
    message(FATAL_ERROR "Selecting USE_POLARSSL_TESTCERT or USE_POLARSSL_HAVEGE implies SSL=polarssl")
  endif(SSL MATCHES "openssl" OR SSL MATCHES "gnutls")
endif(USE_POLARSSL_TESTCERT OR USE_POLARSSL_HAVEGE)

find_package(Libconfig REQUIRED)
find_package(ProtobufC REQUIRED)
include(CheckFunctionExists)
include(CheckLibraryExists)

if("${SSL}" STREQUAL "")
  set(SSL "polarssl")
endif("${SSL}" STREQUAL "")

if("${SSL}" STREQUAL "openssl")
  find_package(OpenSSL REQUIRED)
  if(OPENSSL_FOUND)
    set(SSLIMP_LIBRARIES ${OPENSSL_LIBRARIES})
    set(SSLIMP_INCLUDE_DIR ${OPENSSL_INCLUDE_DIR})
    set(SSLIMP_LIBRARY_DIR ${OPENSSL_LIB_DIR})
  endif(OPENSSL_FOUND)
elseif("${SSL}" STREQUAL "polarssl")
  find_package(PolarSSL REQUIRED)
  if(POLARSSL_FOUND)
    set(USE_POLARSSL ON)
    set(SSLIMP_LIBRARIES ${POLARSSL_LIBRARIES})
    set(SSLIMP_INCLUDE_DIR ${POLARSSL_INCLUDE_DIR})
    set(SSLIMP_LIBRARY_DIR ${POLARSSL_LIB_DIR})
  endif(POLARSSL_FOUND)
elseif("${SSL}" STREQUAL "gnutls")
  find_package(GnuTLS 3 REQUIRED)
  if(GNUTLS_FOUND)
    set(USE_GNUTLS ON)
    set(SSLIMP_LIBRARIES ${GNUTLS_LIBRARIES})
    set(SSLIMP_INCLUDE_DIR ${GNUTLS_INCLUDE_DIR})
    set(SSLIMP_LIBRARY_DIR ${GNUTLS_LIB_DIR})
  endif(GNUTLS_FOUND)
  find_package(Nettle REQUIRED)
  if(NETTLE_FOUND)
    set(CRYPTO_LIBRARIES "${NETTLE_LIBRARIES}")
  endif(NETTLE_FOUND)
endif("${SSL}" STREQUAL "openssl")

check_library_exists(rt clock_gettime "time.h" HAVE_CLOCK_GETTIME_RT)

if(NOT HAVE_CLOCK_GETTIME_RT)
  check_function_exists(clock_gettime HAVE_CLOCK_GETTIME)
  if(NOT HAVE_CLOCK_GETTIME)
    check_library_exists(c clock_get_time "mach/time.h" HAVE_CLOCK_GET_TIME)
    if(NOT HAVE_CLOCK_GET_TIME)
      message(FATAL_ERROR "Didn't find clock_gettime() or clock_get_time()!")
    endif()
  endif()
else()
  set(LIBRT rt)
endif()

if(USE_SHAREDMEMORY_API)
  set(UMURMUR_MONITOR_SOURCE_DIR "${CMAKE_CURRENT_LIST_DIR}/tools/umurmur-monitor/" CACHE PATH "The path to the umurmur-monitor source directory")
  option(BUILD_UMURMUR_MONITOR "Build the umurmur-monitor utility" OFF)

  if(BUILD_UMURMUR_MONITOR)
    if(EXISTS "${UMURMUR_MONITOR_SOURCE_DIR}/CMakeLists.txt")
      add_subdirectory("${CMAKE_CURRENT_LIST_DIR}/tools/umurmur-monitor")
    else()
      message(FATAL_ERROR "Could not find umurmur-monitor source. Please specify UMURMUR_MONITOR_SOURCE_DIR")
    endif()
  endif()
endif()

set(SOURCE "")
add_subdirectory(src)

configure_file(src/config.h.in ${CMAKE_SOURCE_DIR}/src/config.h)

include_directories(${LIBCONFIG_INCLUDE_DIR} ${PROTOBUFC_INCLUDE_DIR} ${SSLIMP_INCLUDE_DIR})
link_directories(${LIBCONFIG_LIB_DIR} ${PROTOBUFC_LIB_DIR} ${SSLIMP_LIB_DIR})

add_executable(${PROJECT_NAME} ${SOURCE})
install(TARGETS ${PROJECT_NAME} RUNTIME DESTINATION "bin")

find_path(OLD_CONFIG_FILE NAMES "umurmur.conf" PATHS ${CMAKE_INSTALL_PREFIX} PATH_SUFFIXES "etc")
if(NOT OLD_CONFIG_FILE)
  install(FILES "umurmur.conf.example" DESTINATION "etc" RENAME "umurmur.conf")
endif(NOT OLD_CONFIG_FILE)

add_definitions(${SSLIMP_CFLAGS})

target_link_libraries(${PROJECT_NAME} ${LIBCONFIG_LIBRARIES} ${PROTOBUFC_LIBRARIES} ${SSLIMP_LIBRARIES} ${LIBRT} ${CRYPTO_LIBRARIES})