#----------------------------------------------------------------------------
# Setup the project
cmake_minimum_required(VERSION 3.16...3.27)
project(DRAGONsim)

#----------------------------------------------------------------------------
# Find Geant4 package, activating all available UI and Vis drivers by default
# You can set WITH_GEANT4_UIVIS to OFF via the command line or ccmake/cmake-gui
# to build a batch mode only executable
#
option(WITH_GEANT4_UIVIS "Build example with Geant4 UI and Vis drivers" ON)
if(WITH_GEANT4_UIVIS)
  find_package(Geant4 REQUIRED ui_all vis_all)
else()
  find_package(Geant4 REQUIRED)
endif()

#----------------------------------------------------------------------------
# Setup Geant4 include directories and compile definitions
# Setup include directory for this project
#
include(${Geant4_USE_FILE})
include_directories(${PROJECT_SOURCE_DIR}/include)

#----------------------------------------------------------------------------
# Locate sources and headers for this project
# NB: headers are included so they will show up in IDEs
#
file(GLOB sources ${PROJECT_SOURCE_DIR}/src/*.cc)
file(GLOB headers ${PROJECT_SOURCE_DIR}/include/*.hh)
file(COPY ${CMAKE_SOURCE_DIR}/dragon_2014_IC.dat DESTINATION ${CMAKE_BINARY_DIR})
file(COPY ${CMAKE_SOURCE_DIR}/hist6p2e.txt DESTINATION ${CMAKE_BINARY_DIR})

#----------------------------------------------------------------------------
# Add the executable, and link it to the Geant4 libraries
#
add_executable(DRAGON DRAGON.cc ${sources} ${headers})
target_link_libraries(DRAGON ${Geant4_LIBRARIES})

#----------------------------------------------------------------------------
# Copy all scripts to the build directory, i.e. the directory in which we
# build DRAGON. This is so that we can run the executable directly because it
# relies on these scripts being in the current working directory.
#
set(DRAGON_SCRIPTS
  DRAGON.in
  DRAGON.out
  init_vis.mac
  run1.mac
  run2.mac
  vis.mac
  )

foreach(_script ${DRAGON_SCRIPTS})
  configure_file(
    ${PROJECT_SOURCE_DIR}/${_script}
    ${PROJECT_BINARY_DIR}/${_script}
    COPYONLY
    )
endforeach()

#----------------------------------------------------------------------------
# For internal Geant4 use - but has no effect if you build this
# example standalone
#
add_custom_target(DRAGONsim DEPENDS DRAGON)

#----------------------------------------------------------------------------
# Install the executable to 'bin' directory under CMAKE_INSTALL_PREFIX
#
install(TARGETS DRAGON DESTINATION bin)


option(WITH_ROOT "Build DRAGON with ROOT" ON)
if(WITH_ROOT)
  find_package(ROOT REQUIRED Hist RIO)
# ROOT version 6 required
   if(ROOT_FOUND)
     STRING(REGEX MATCH "6.*" VERSION6MATCH ${ROOT_VERSION})
     if(NOT VERSION6MATCH)
       message(FATAL_ERROR "${name} requires ROOT 6")
     endif()
   endif()
# Include ROOT's CMake functions for dictionary generation
#  since root6.20, the file is renamed and included by default, so include
#  only when we find the *old* name
   if(EXISTS "${ROOT_DIR}/modules/RootNewMacros.cmake")
     include("${ROOT_DIR}/modules/RootNewMacros.cmake")
   endif()
endif()

if(WITH_ROOT)
   include_directories(${ROOT_INCLUDE_DIRS})
   target_link_libraries(DRAGON ${ROOT_LIBRARIES} ${Geant4_LIBRARIES})
   #link_directories(${ROOT_LIBRARY_DIR})
endif()