# *********************************
# ************ cmake **************
# *********************************
CMAKE_MINIMUM_REQUIRED(VERSION 2.6)
CMAKE_POLICY(SET CMP0043 NEW)
CMAKE_POLICY(SET CMP0048 NEW)

# Enable debug symbols by default
# must be done before project() statement
SET(CMAKE_BUILD_TYPE_INIT Release)
# (you can also set it on the command line: -D CMAKE_BUILD_TYPE=Release)

# Enable CLANG as default compilers, to change this use
# cmake -DCMAKE_C_COMPILER=cc -DCMAKE_CXX_COMPILER=c++
# Note that if compilers are switched on the fly,
# the cache is deleted
IF(NOT DEFINED CMAKE_C_COMPILER)
	FIND_PROGRAM(CMAKE_C_COMPILER   NAMES $ENV{CC}  clang   gcc cc  PATHS ENV PATH NO_DEFAULT_PATH DOC "C Compiler")
ENDIF()
IF(NOT DEFINED CMAKE_CXX_COMPILER)
	FIND_PROGRAM(CMAKE_CXX_COMPILER NAMES $ENV{CXX} clang++ g++ c++ PATHS ENV PATH NO_DEFAULT_PATH DOC "C++ Compiler")
ENDIF()

#SET(CMAKE_VERBOSE_MAKEFILE ON)

# To check for an include file you do this:
#CHECK_INCLUDE_FILE("stdint.h"        HAVE_STDINT_H)
# To check the size of a primitive type:
#CHECK_TYPE_SIZE("int"   SIZEOF_INT)



# *********************************
# ************ Project ************
# *********************************

STRING(TIMESTAMP VERSION %y.%U.%w.%H UTC)

MESSAGE(STATUS "Mars V${VERSION}")

PROJECT(mars VERSION ${VERSION})

INCLUDE(GNUInstallDirs)

# ======== For config.h.in =========
SET(PACKAGE_MAINTAINER "Thomas Bretz")
SET(PACKAGE_BUGREPORT  "tbretz@physik.rwth-aachen.de")
SET(PACKAGE_URL        "https://www.fact-project.org")

FIND_PROGRAM(LSB_RELEASE_EXE NAMES lsb_release)
IF (DEFINED LSB_RELEASE_EXE)
   EXECUTE_PROCESS(COMMAND ${LSB_RELEASE_EXE} -d OUTPUT_VARIABLE LSB_RELEASE OUTPUT_STRIP_TRAILING_WHITESPACE)
   MESSAGE(STATUS ${LSB_RELEASE})
ENDIF()

# *********************************
# ********* Requirements **********
# *********************************

# Inlclude the main source AND build dir itself
#SET(CMAKE_INCLUDE_CURRENT_DIR ON)
SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)

# =========== help2man ============
FIND_PROGRAM(HELP2MAN_EXECUTABLE help2man)

# =========== pkg-config ============
FIND_PACKAGE(PkgConfig)
FIND_PACKAGE(PackageHandleStandardArgs)


# ============= libnova ==============

PKG_CHECK_MODULES(Nova QUIET Nova)

# Try to locate the package in the default path
# and in the path provided by pkg-config
FIND_PATH(NOVA_INCLUDE_DIR NAMES libnova/libnova.h PATHS ${NOVA_INCLUDE_DIRS})
FIND_LIBRARY(NOVA_LIBRARY NAMES nova PATHS ${NOVA_LIBRARY_DIRS})

# Check if NOVA_LIBARARY and NOVA_INCLUDE_DIR is set
# Print a message otherwise
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Nova DEFAULT_MSG NOVA_LIBRARY NOVA_INCLUDE_DIR)

# Mark those variables to be displayed as 'advanced' in the GUI
MARK_AS_ADVANCED(NOVA_LIBRARY NOVA_INCLUDE_DIR)

# handle success
FIND_PACKAGE_MESSAGE(NovaInc "Found Nova headers in ${NOVA_INCLUDE_DIR}" "[${NOVA_LIBRARY}][${NOVA_INCLUDE_DIR}]")


# ============== libz ================

FIND_PACKAGE(ZLIB REQUIRED)

# ============== ROOT ================

FIND_PROGRAM(ROOTCONFIG_EXECUTABLE NAMES root-config)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(root-config DEFAULT_MSG ROOTCONFIG_EXECUTABLE)
IF(NOT ROOTCONFIG_EXECUTABLE)
   MESSAGE(FATAL_ERROR "Please make sure `root-config` is accessible in your path. In case of an installation from source, you might need to source\n . [path-to-root]/bin/thisroot.sh")
ENDIF()

# You need to tell CMake where to find the ROOT installation. This can be done in a number of ways:
#   - ROOT built with classic configure/make use the provided $ROOTSYS/etc/cmake/FindROOT.cmake
#   - ROOT built with CMake. Add in CMAKE_PREFIX_PATH the installation prefix for ROOT
IF(EXISTS $ENV{ROOTSYS}/ROOTConfig.cmake)
   IF(NOT DEFINED ENV{CMAKE_PREFIX_PATH})
      LIST(APPEND CMAKE_PREFIX_PATH $ENV{ROOTSYS})
   ENDIF()
ELSE()
   SET(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "$ENV{ROOTSYS}/etc/cmake")
ENDIF()

#---Locate the ROOT package and defines a number of variables (e.g. ROOT_INCLUDE_DIRS)
FIND_PACKAGE(ROOT REQUIRED COMPONENTS Gui Minuit ASImage HistPainter)

IF(NOT DEFINED ROOT_CONFIG_EXECUTABLE)
   FIND_PACKAGE_MESSAGE(RootFound "Found ROOT: ${ROOT_INCLUDE_DIRS} [${ROOT_VERSION}]" "[${ROOT_INCLUDE_DIRS}][${ROOT_LIBRARY_DIR}][${ROOT_VERSION}]")
ENDIF()

#---Define useful ROOT functions and macros (e.g. ROOT_GENERATE_DICTIONARY)
IF(DEFINED ROOT_USE_FILE)
   FIND_PACKAGE_MESSAGE(RootInclude "Setup ROOT: ${ROOT_USE_FILE}" "[${ROOT_USE_FILE}]")
   INCLUDE(${ROOT_USE_FILE})
ELSE()
   FIND_PACKAGE_MESSAGE(RootInclude "Setup ROOT: ${ROOT_VERSION}" "[${ROOT_VERSION}]")
   # From RootUseFile.cmake (root 6)
   INCLUDE_DIRECTORIES(${ROOT_INCLUDE_DIRS})
   LINK_DIRECTORIES(${ROOT_LIBRARY_DIR})
   ADD_DEFINITIONS(${ROOT_DEFINITIONS})
   SET(CMAKE_CXX_FLAGS     "${CMAKE_CXX_FLAGS} ${ROOT_CXX_FLAGS}")
   SET(CMAKE_C_FLAGS       "${CMAKE_C_FLAGS} ${ROOT_C_FLAGS}")
   SET(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} ${ROOT_fortran_FLAGS}")
ENDIF()

# -lGui -lCore -lCint -lRIO -lNet -lHist -lGraf -lGraf3d -lGpad -lTree
# -lRint -lPostscript -lMatrix -lPhysics -lMathCore -lThread
# -lASImage -lMinuit -lHistPainter -lThread

#MESSAGE("INCL_DIRS: ${ROOT_INCLUDE_DIRS}")
#MESSAGE("LIBS:      ${ROOT_LIBRARIES}")
#MESSAGE("DEFS:      ${ROOT_DEFINITIONS}")
#MESSAGE("CXXFLAGS:  ${ROOT_CXX_FLAGS}")
#MESSAGE("CXFLAGS:   ${ROOT_CC_FLAGS}")
#MESSAGE("FOUND:     ${ROOT_FOUND}")
#MESSAGE("FILE:      ${ROOT_USE_FILE}")
#MESSAGE("DIR:       ${CMAKE_CURRENT_SOURCE_DIR}")
#ROOT_<library>_LIBRARY	PATH	Full path for each of the ROOT libraries listed in COMPONENTS
#ROOT_<command>_CMD	PATH	Full path for each ROOT executable (rootcling, root, hadd, etc.)
#ROOT_<option>_FOUND	BOOL	True for each enabled build option (e.g. cocoa, python, xrootd, etc.)

# function ROOT_GENERATE_DICTIONARY( dictionary
#                                    header1 header2 ...
#                                    LINKDEF linkdef1 ...
#                                    OPTIONS opt1...)

# *********************************
# ********** Observatory **********
# *********************************

SET(OBSERVATORY "ORM" CACHE STRING "Select the observatory location (ORM, HAWC, SPM, RWTH: see nova.h)")

IF(NOT OBSERVATORY STREQUAL "ORM"  AND
   NOT OBSERVATORY STREQUAL "HAWC" AND
   NOT OBSERVATORY STREQUAL "SPM"  AND
   NOT OBSERVATORY STREQUAL "RWTH")
   MESSAGE(FATAL_ERROR "OBSERVATORY=${OBSERVATORY} invalid. Only ORM, HAWC, SPM and RWTH allowd!")
ENDIF()

FIND_PACKAGE_MESSAGE(PresetObservatory "Preset Observatory: ${OBSERVATORY}" "[${OBSERVATORY}]")


# *********************************
# *********** Compiler ************
# *********************************

SET(CMAKE_CXX_STANDARD 11)
SET(CMAKE_CXX_FLAGS
	"${CMAKE_CXX_FLAGS} -Wall -Winit-self -Wpointer-arith \
         -Wcast-align -Wformat -Woverloaded-virtual \
         -Wnon-virtual-dtor -Wshadow -fPIC") # -Wextra

SET(CMAKE_CXX_FLAGS
	"${CMAKE_CXX_FLAGS} \
         -DMARSVER=\\\"1.0\\\" -D_REENTRANT -D__MARS__ -D__LINUX__ \
         -DPACKAGE_VERSION=\\\"1.0\\\" -DREVISION=\\\"1.0\\\" \
         -DPACKAGE_NAME=\\\"MARS\\\" -DHAVE_ZLIB")

CONFIGURE_FILE("${PROJECT_SOURCE_DIR}/cmake/root.rc.in"     "${PROJECT_BINARY_DIR}/.rootrc")
CONFIGURE_FILE("${PROJECT_SOURCE_DIR}/cmake/rootlogon.C.in" "${PROJECT_BINARY_DIR}/rootlogon.C")
CONFIGURE_FILE("${PROJECT_SOURCE_DIR}/cmake/dohtml.C.in"    "${PROJECT_BINARY_DIR}/dohtml.C")

# -------------------------------------------------------

FILE(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/dictionary)

MACRO(SRCFILES subdir)

	MESSAGE(STATUS "Reading source list from ${DIR}/Makefile")

 	EXECUTE_PROCESS(COMMAND
		${PROJECT_SOURCE_DIR}/Makefile.extract.sh ${subdir}
	        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}/${subdir}
		OUTPUT_VARIABLE _HEADERS)

        SEPARATE_ARGUMENTS(_HEADERS)

        LIST(GET       _HEADERS 0 _CINT)
        LIST(REMOVE_AT _HEADERS 0)

 	SET(_SRCLIST ${_HEADERS})

        STRING(REPLACE "${subdir}/" " "    _HEADERS ${_HEADERS}) # Remove directory
        STRING(REPLACE ".cc"        ".h"   _HEADERS ${_HEADERS}) # change extension
        STRING(REPLACE ".cxx"       ".hxx" _HEADERS ${_HEADERS}) # special for files in mmc

	SEPARATE_ARGUMENTS(_HEADERS)

	# - This adds the rule how the dictionary is created
        ROOT_GENERATE_DICTIONARY(dictionary/${_CINT} ${_HEADERS} ${_CINT}Incl.h LINKDEF ${subdir}/${_CINT}LinkDef.h OPTIONS -p  -D__MARS__ -DHAVE_ZLIB)
	# - This makes sure that it is compiled
	TARGET_SOURCES(mars PRIVATE dictionary/${_CINT}.cxx ${_SRCLIST})

        INSTALL(DIRECTORY ${subdir}/ DESTINATION "include" FILES_MATCHING PATTERN "*.h")

ENDMACRO()

# -------------------------------------------------------

#SET(DIRECTORIES mmc)

SET(DIRECTORIES
	manalysis
        mastro
        mbadpixels
	mbase
        mcalib
        mcamera
	mcorsika
        mdata
        mdrs
        melectronics
        mextralgo
        mfbase
	mfileio
        mfilter
        mgeom
        mgui
        mhbase
        mhcalib
        mhflux
        mhft
        mhist
        mhvstime
        mimage
        mjobs
        mjoptim
        mjtrain
        mmain
        mmc
        mmovie
        mmuon
        mpedestal
        mpointing
        mranforest
        mraw
        mreport
        msignal
        msim
        msimcamera
        msimreflector
        msql
        mtools
        mtrigger
)

INCLUDE_DIRECTORIES(${DIRECTORIES} mcore .)

ROOT_GENERATE_DICTIONARY(dictionary/Core
	   mcore/factofits.h
	   mcore/factfits.h
	   mcore/DrsCalib.h
	   mcore/PixelMap.h
	   mcore/Interpolator2D.h
	   mcore/nova.h
	   mcore/Prediction.h
           MIncl.h
        LINKDEF MLinkDef.h
        OPTIONS -p -D__MARS__ -DHAVE_ZLIB)

ADD_LIBRARY(mars SHARED dictionary/Core.cxx) # CMAKE_POSITION_INDEPENDENT_CODE
TARGET_LINK_LIBRARIES(mars
        ZLIB::ZLIB
        ${NOVA_LIBRARY}
        ${ROOT_LIBRARIES})

ADD_EXECUTABLE(showplot showplot.cc)
ADD_EXECUTABLE(showlog  showplot.cc)
ADD_EXECUTABLE(ceres    ceres.cc)
TARGET_LINK_LIBRARIES(showplot mars ${ROOT_LIBRARIES})
TARGET_LINK_LIBRARIES(showlog  mars ${ROOT_LIBRARIES})
TARGET_LINK_LIBRARIES(ceres    mars ${ROOT_LIBRARIES})


FOREACH(DIR ${DIRECTORIES})
	SRCFILES(${DIR})
ENDFOREACH()

# rootlogon.C finds the shared object only if the libmars.so is in the same directory than the dictionary files
# there is a way to create a map file with rootcling - but I haven#t yet fugured out how. Note that a link is not enough
#ADD_CUSTOM_COMMAND(TARGET mars POST_BUILD
#	COMMAND cp -f ${PROJECT_BINARY_DIR}/libmars.so ${PROJECT_BINARY_DIR}/dictionary/libmars.so
#	COMMENT "Copying libmars.so to ${PROJECT_BINARY_DIR}/dictionary")

#---Create a shared library with geneated dictionary
#ADD_LIBRARY(Event SHARED Event.cxx G__Event.cxx)
#TARGET_LINK_LIBRARIES(Event ${ROOT_LIBRARIES})

#---Create  a main program using the library
#ADD_EXECUTABLE(Main MainEvent.cxx)
#TARGET_LINK_LIBRARIES(Main Event)


# *********************************
# ************ Packaging **********
# *********************************

#SET(PKG_SHARE    "${CMAKE_INSTALL_DATAROOTDIR}/${PROJECT_NAME}")
#SET(PKG_APPS     "${CMAKE_INSTALL_DATAROOTDIR}/applications")
#SET(PKG_PIXMAPS  "${CMAKE_INSTALL_DATAROOTDIR}/pixmaps")

# ====== Installation targets =====

#INSTALL(TARGETS  mars           DESTINATION "${CMAKE_INSTALL_BINDIR}")
INSTALL(TARGETS   mars         DESTINATION ".")
INSTALL(TARGETS   showplot     DESTINATION ".")
INSTALL(TARGETS   showlog      DESTINATION ".")
INSTALL(TARGETS   ceres        DESTINATION ".")
INSTALL(FILES     .rootrc      DESTINATION ".")
INSTALL(DIRECTORY lib          DESTINATION ".")
INSTALL(DIRECTORY macros       DESTINATION "." FILES_MATCHING PATTERN "*.C")
INSTALL(DIRECTORY fact         DESTINATION "." FILES_MATCHING PATTERN "*.C")
INSTALL(DIRECTORY datacenter   DESTINATION ".")
INSTALL(DIRECTORY scripts      DESTINATION ".")
INSTALL(DIRECTORY resources    DESTINATION "." FILES_MATCHING PATTERN "*.rc" PATTERN "*.txt")
INSTALL(DIRECTORY resmc        DESTINATION "." FILES_MATCHING PATTERN "*" )
INSTALL(DIRECTORY mcore/       DESTINATION "include" FILES_MATCHING PATTERN "*.h")


# ======== General packaging ======
# https://cmake.org/cmake/help/latest/module/CPack.html

INCLUDE(InstallRequiredSystemLibraries)

# SET(CPACK_STRIP_FILES ON) # Strip debug sysmbold from files

SET(CPACK_PACKAGE_VERSION       "${mars_VERSION}")
SET(CPACK_PACKAGE_CONTACT       "${PACKAGE_BUGREPORT}")
SET(CPACK_PACKAGE_MAINTAINER    "${PACKAGE_MAINTAINER}")
#SET(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_SOURCE_DIR}/COPYING")
#SET(CPACK_PACKAGE_VENDOR "Me, myself, and I")


SET(CPACK_SOURCE_IGNORE_FILES "/old/;/build/;/[.].*/;/autom4te[.]cache/;.*~;.log$")

# Maybe the text displayed in synaptic?
#SET(CPACK_PACKAGE_DESCRIPTION_FILE "${CMAKE_SOURCE_DIR}/README")
SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "MARS - Environment")
#CPACK_RESOURCE_FILE_README     ReadMe file to be embedded in the installer.

SET(CPACK_GENERATOR        TBZ2) # TGZ DEB
#SET(CPACK_SOURCE_GENERATOR TBZ2) # TGZ
#SET(CPACK_PROJECT_CONFIG_FILE ${CMAKE_SOURCE_DIR}/cmake/Package.txt)
#SET(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/Copyright.txt")


# ======== Debian packaging =======
# https://cmake.org/cmake/help/latest/module/CPackDeb.html
# https://www.debian.org/doc/debian-policy

#SET(CPACK_DEBIAN_PACKAGE_DEPENDS "libao4 (>=1.0), libsfm-system2.3v5 (>=2.3), libsfml-graphicsv2.3v5 (>=2.3), libsfml-audio2.3v5 (>=2.3), libsfm-window2.3v5 (>2.3)")
SET(CPACK_DEBIAN_PACKAGE_SHLIBDEPS 1) # generate better (atomatic?) dependecies
SET(CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS_POLICY ">=")
SET(CPACK_DEBIAN_PACKAGE_CONTROL_STRICT_PERMISSION TRUE)
SET(CPACK_DEBIAN_PACKAGE_SECTION utils)
SET(CPACK_DEBIAN_PACKAGE_HOMEPAGE "${PACKAGE_URL}")
SET(CPACK_DEBIAN_PACKAGE_DESCRIPTION
"${CPACK_PACKAGE_DESCRIPTION_SUMMARY}
 This package contains the MARS Analysis Environment.")
#indent the long description with spaces

#CPACK_INSTALL_CMAKE_PROJECTS
#List of four values that specify what project to install. Build directory, Project Name, Project Component, Directory.

INCLUDE(CPack)