cmake_minimum_required (VERSION 2.8.11)
project (upm)

if ("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
message("WARNING: building into sources dir can be risky, prefer other directory")
endif ()

find_package (SWIG)
if (SWIG_FOUND)
  include (${SWIG_USE_FILE})
endif ()

find_package (Threads REQUIRED)
find_package (PkgConfig REQUIRED)

# force a libmraa search and minimum required version every time a config is generated
unset(MRAA_FOUND CACHE)
pkg_check_modules (MRAA REQUIRED mraa>=0.6.0)
message (INFO " found libmraa version: ${MRAA_VERSION}")

# Appends the cmake/modules path to MAKE_MODULE_PATH variable.
set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})
set (LIB_INSTALL_DIR "lib${LIB_SUFFIX}" CACHE PATH "Installation path for libraries")

# Set CMAKE_LIB_INSTALL_DIR if not defined
include(GNUInstallDirs)

# Make a version file containing the current version from git.
include (GetGitRevisionDescription)
git_describe (VERSION "--tags")
if ("x_${VERSION}" STREQUAL "x_GIT-NOTFOUND")
  message (WARNING " - Install git to compile a production libmraa!")
  set (VERSION "v0.2.0-dirty")
endif ()

message (INFO " - UPM Version ${VERSION}")

#parse the version information into pieces.
string (REGEX REPLACE "^v([0-9]+)\\..*" "\\1" VERSION_MAJOR "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.([0-9]+).*" "\\1" VERSION_MINOR "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" VERSION_PATCH "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.[0-9]+\\-([0-9]+).*" "\\1" VERSION_COMMIT "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.[0-9]+-[0-9]+\\-(.*)" "\\1" VERSION_SHA1 "${VERSION}")

if ("${VERSION_COMMIT}" MATCHES "^v.*")
  set (VERSION_COMMIT "")
endif()

set (upm_VERSION_MAJOR ${VERSION_MAJOR})
set (upm_VERSION_MINOR ${VERSION_MINOR})
set (upm_VERSION_PATCH ${VERSION_PATCH})
set (upm_VERSION_STRING ${upm_VERSION_MAJOR}.${upm_VERSION_MINOR}.${upm_VERSION_PATCH})

set (CMAKE_SWIG_FLAGS "")

option (IPK "Generate IPK using CPack" OFF)
option (BUILDDOC "Build all doc." OFF)
option (BUILDSWIG "Build swig modules." ON)
option (BUILDSWIGPYTHON "Build swig python modules." ON)
option (BUILDSWIGNODE "Build swig node modules." ON)

if (BUILDDOC)
  # add a target to generate API documentation with Doxygen
  find_package (Doxygen)
  if (DOXYGEN_FOUND)
    configure_file (${CMAKE_CURRENT_SOURCE_DIR}/doxy/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
    add_custom_target (doc
      ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
      COMMENT "Generating API documentation with Doxygen" VERBATIM
    )
  endif (DOXYGEN_FOUND)
  # check if Sphinx is installed and add target to generate API documentation
  find_package (Sphinx)
  if(SPHINX_FOUND)
    # python required for Sphinx build
    find_package (PythonLibs)
    string (REPLACE "." ";" PYTHON_VERSION_LIST ${PYTHONLIBS_VERSION_STRING})
    list (GET PYTHON_VERSION_LIST 0 PYTHON_VERSION_MAJOR)
    list (GET PYTHON_VERSION_LIST 1 PYTHON_VERSION_MINOR)
    set (SITE_PACKAGES ${CMAKE_INSTALL_LIBDIR}/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/site-packages)

    # throw a warning if site-packages doesn't exist, might need a more robust way on adding make install dependency and paths
    if (NOT EXISTS ${CMAKE_CURRENT_BINARY_DIR}/${SITE_PACKAGES})
      message( WARNING " - Sphinx documentation 'pydoc' target depends on python libs generated by 'install' target. Run that first!")
    endif()

    configure_file (${CMAKE_CURRENT_SOURCE_DIR}/doxy/conf.py.in ${CMAKE_CURRENT_BINARY_DIR}/pydoc/conf.py @ONLY)
    configure_file (${CMAKE_CURRENT_SOURCE_DIR}/doxy/index.rst ${CMAKE_CURRENT_BINARY_DIR}/pydoc/index.rst)
    add_custom_target (pydoc
      ${SPHINX_API_EXECUTABLE} -f -o pydoc ${SITE_PACKAGES}
      # todo: use a separate cmake FILE module for string replacement instead
      COMMAND sed -i.bak s|site-packages|sensor-drivers|g pydoc/modules.rst
      COMMAND ${SPHINX_EXECUTABLE} -b html pydoc html/python
      COMMAND sed -i.bak s|\">pyupm_|\">|g html/python/index.html html/python/modules.html
      COMMAND sed -i.bak s|[[:space:]]module</a>|</a>|g html/python/index.html html/python/modules.html
      # cleanup .pyc files
      COMMAND find ${SITE_PACKAGES} -name *.pyc -exec rm {} \;
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
      COMMENT "Generating API documentation with Sphinx" VERBATIM
    )
  endif()
endif()

if (IPK)
  include (TargetArch)
  target_architecture (DETECTED_ARCH)
  message( INFO " - Target arch is ${DETECTED_ARCH}")

  set(CPACK_GENERATOR "DEB" "TGZ")
  set(OPKG_ARCH ${DETECTED_ARCH})
  set(CPACK_BINARY_DIR ${CMAKE_BINARY_DIR})
  set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Intel IoT-Devkit") #required
  set(upm_PACKAGE_ON_TAG ".")
  if ("${VERSION_COMMIT}" STREQUAL "")
    set(upm_PACKAGE_ON_TAG "")
  endif()
  set(CPACK_PACKAGE_VERSION
      "${upm_VERSION_MAJOR}.${upm_VERSION_MINOR}.${upm_VERSION_PATCH}${upm_PACKAGE_ON_TAG}${VERSION_COMMIT}")
  set(CPACK_PACKAGE_NAME "upm")
  set(CPACK_DEBIAN_PACKAGE_SECTION "libs")
  set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE ${DETECTED_ARCH})
  set(CPACK_SYSTEM_NAME ${DETECTED_ARCH})
  set(CPACK_DEBIAN_PACKAGE_DEPENDS "libmraa0 (>= ${MRAA_VERSION})")
  set(CPACK_DEBIAN_PACKAGE_PROVIDES "upm-dev, upm-dbg, upm-doc")
  set(CPACK_DEBIAN_PACKAGE_REPLACES ${CPACK_DEBIAN_PACKAGE_PROVIDES})
  set(CPACK_DEBIAN_PACKAGE_CONFLICTS ${CPACK_DEBIAN_PACKAGE_PROVIDES})
  set(WDIR "${CPACK_TOPLEVEL_DIRECTORY}/${CPACK_PACKAGE_FILE_NAME}")
  include (CPack)
endif()

add_subdirectory (src)
add_subdirectory (examples/c++)