#
# Copyright 2010 Ettus Research LLC
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

########################################################################
# Check Python Modules
########################################################################
PYTHON_CHECK_MODULE(
    "Python version 2.6 or greater"
    "platform" "platform.python_version() >= '2.6'"
    HAVE_PYTHON_PLAT_MIN_VERSION
)

PYTHON_CHECK_MODULE(
    "Cheetah templates 2.0.0 or greater"
    "Cheetah" "Cheetah.Version >= '2.0.0'"
    HAVE_PYTHON_MODULE_CHEETAH
)

IF(NOT HAVE_PYTHON_PLAT_MIN_VERSION OR NOT HAVE_PYTHON_MODULE_CHEETAH)
    MESSAGE(FATAL_ERROR "Error: python requirements not met for the build system.")
ENDIF(NOT HAVE_PYTHON_PLAT_MIN_VERSION OR NOT HAVE_PYTHON_MODULE_CHEETAH)

########################################################################
# Helpful Macros
########################################################################
MACRO(LIBUHD_APPEND_SOURCES)
    LIST(APPEND libuhd_sources ${ARGV})
ENDMACRO(LIBUHD_APPEND_SOURCES)

MACRO(LIBUHD_APPEND_LIBS)
    LIST(APPEND libuhd_libs ${ARGV})
ENDMACRO(LIBUHD_APPEND_LIBS)

MACRO(LIBUHD_PYTHON_GEN_SOURCE pyfile outfile)
    #ensure that the directory exists for outfile
    GET_FILENAME_COMPONENT(outfile_dir ${outfile} PATH)
    FILE(MAKE_DIRECTORY ${outfile_dir})

    #make the outfile depend on the python script
    ADD_CUSTOM_COMMAND(
        OUTPUT ${outfile} DEPENDS ${pyfile}
        COMMAND ${PYTHON_EXECUTABLE} ${pyfile} ${outfile}
        COMMENT "Generating ${outfile}"
    )

    #make libuhd depend on the outfile
    LIBUHD_APPEND_SOURCES(${outfile})
ENDMACRO(LIBUHD_PYTHON_GEN_SOURCE)

MACRO(INCLUDE_SUBDIRECTORY subdir)
    #insert the current directories on the front of the list
    LIST(INSERT _cmake_source_dirs 0 ${CMAKE_CURRENT_SOURCE_DIR})
    LIST(INSERT _cmake_binary_dirs 0 ${CMAKE_CURRENT_BINARY_DIR})

    #set the current directories to the names of the subdirs
    SET(CMAKE_CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/${subdir})
    SET(CMAKE_CURRENT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/${subdir})

    #include the subdirectory CMakeLists to run it
    FILE(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
    INCLUDE(${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt)

    #reset the value of the current directories
    LIST(GET _cmake_source_dirs 0 CMAKE_CURRENT_SOURCE_DIR)
    LIST(GET _cmake_binary_dirs 0 CMAKE_CURRENT_BINARY_DIR)

    #pop the subdir names of the front of the list
    LIST(REMOVE_AT _cmake_source_dirs 0)
    LIST(REMOVE_AT _cmake_binary_dirs 0)
ENDMACRO(INCLUDE_SUBDIRECTORY)

########################################################################
# Include subdirectories (different than add)
########################################################################
INCLUDE_SUBDIRECTORY(ic_reg_maps)
INCLUDE_SUBDIRECTORY(transport)
INCLUDE_SUBDIRECTORY(usrp)
INCLUDE_SUBDIRECTORY(utils)

########################################################################
# Append to the list of sources for lib uhd
########################################################################
FILE(TO_NATIVE_PATH ${CMAKE_INSTALL_PREFIX}/${PKG_DATA_DIR} LOCAL_PKG_DATA_DIR)
STRING(REPLACE "\\" "\\\\" LOCAL_PKG_DATA_DIR ${LOCAL_PKG_DATA_DIR})
MESSAGE(STATUS "Local package data directory: ${LOCAL_PKG_DATA_DIR}")

IF(UNIX)
    #on unix systems, installers will use this directory for the package data
    FILE(TO_NATIVE_PATH /usr/${PKG_DATA_DIR} INSTALLER_PKG_DATA_DIR)
    STRING(REPLACE "\\" "\\\\" INSTALLER_PKG_DATA_DIR ${INSTALLER_PKG_DATA_DIR})
    MESSAGE(STATUS "Installer package data directory: ${INSTALLER_PKG_DATA_DIR}")
ENDIF(UNIX)

CONFIGURE_FILE(
    ${CMAKE_CURRENT_SOURCE_DIR}/constants.hpp.in
    ${CMAKE_CURRENT_BINARY_DIR}/constants.hpp
@ONLY)
INCLUDE_DIRECTORIES(${CMAKE_CURRENT_BINARY_DIR})

LIBUHD_APPEND_SOURCES(
    ${CMAKE_CURRENT_BINARY_DIR}/constants.hpp
    ${CMAKE_CURRENT_SOURCE_DIR}/device.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/types.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/version.cpp
    ${CMAKE_CURRENT_SOURCE_DIR}/wax.cpp
)

########################################################################
# Setup libuhd library
########################################################################
ADD_LIBRARY(uhd SHARED ${libuhd_sources})
TARGET_LINK_LIBRARIES(uhd ${Boost_LIBRARIES} ${libuhd_libs})
SET_TARGET_PROPERTIES(uhd PROPERTIES DEFINE_SYMBOL "UHD_DLL_EXPORTS")

INSTALL(TARGETS uhd
    LIBRARY DESTINATION ${LIBRARY_DIR} # .so file
    ARCHIVE DESTINATION ${LIBRARY_DIR} # .lib file
    RUNTIME DESTINATION ${LIBRARY_DIR} # .dll file
)