# ---- Developer mode ----

# Developer mode enables targets and code paths in the CMake scripts that are
# only relevant for the developer(s) of operon
# Targets necessary to build the project must be provided unconditionally, so
# consumers can trivially build and package the project
if(PROJECT_IS_TOP_LEVEL)
  option(operon_DEVELOPER_MODE "Enable developer mode" OFF)
  option(BUILD_SHARED_LIBS "Build shared libs." OFF)

  # compile and link-time options
  set(JEMALLOC_DESCRIPTION             "Link against jemalloc, a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support [default=OFF].")
  set(USE_SINGLE_PRECISION_DESCRIPTION "Perform model evaluation using floats (single precision) instead of doubles. Great for reducing runtime, might not be appropriate for all purposes [default=OFF].")
  set(USE_CERES_DESCRIPTION            "Use the non-linear least squares optimizer from Ceres solver to tune model coefficients (if OFF, Eigen::LevenbergMarquardt will be used instead).")
  set(MATH_BACKEND_DESCRIPTION         "Math library for tree evaluation (defaults to Eigen)")

  # option descriptions
  option(USE_JEMALLOC         ${JEMALLOC_DESCRIPTION}             OFF)
  option(USE_SINGLE_PRECISION ${USE_SINGLE_PRECISION_DESCRIPTION}  ON)
  option(USE_CERES            ${USE_CERES_DESCRIPTION}            OFF)
  option(MATH_BACKEND         ${MATH_BACKEND_DESCRIPTION}      "Eigen")

  # provide a summary of configured options
  include(FeatureSummary)
  add_feature_info(USE_JEMALLOC         USE_JEMALLOC             ${JEMALLOC_DESCRIPTION})
  add_feature_info(USE_SINGLE_PRECISION USE_SINGLE_PRECISION     ${USE_SINGLE_PRECISION_DESCRIPTION})
  add_feature_info(USE_CERES            USE_CERES                ${USE_CERES_DESCRIPTION})
  add_feature_info(MATH_BACKEND         MATH_BACKEND_DESCRIPTION ${MATH_BACKEND_DESCRIPTION})
  set(CMAKE_EXPORT_COMPILE_COMMANDS ON CACHE INTERNAL "")
  if(CMAKE_EXPORT_COMPILE_COMMANDS)
    set(CMAKE_CXX_STANDARD_INCLUDE_DIRECTORIES ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES})
  endif()
endif()


# ---- Suppress C4251 on Windows ----

# Please see include/operon/operon.hpp for more details
set(pragma_suppress_c4251 "#define OPERON_SUPPRESS_C4251")
if(MSVC)
  string(APPEND pragma_suppress_c4251 [[ _Pragma("warning(suppress:4251)")]])
endif()

# ---- Warning guard ----

# target_include_directories with the SYSTEM modifier will request the compiler
# to omit warnings from the provided paths, if the compiler supports that
# This is to provide a user experience similar to find_package when
# add_subdirectory or FetchContent is used to consume this project
set(operon_warning_guard "")
if(NOT PROJECT_IS_TOP_LEVEL)
  option(
      operon_INCLUDES_WITH_SYSTEM
      "Use SYSTEM modifier for operon's includes, disabling warnings"
      ON
  )
  mark_as_advanced(operon_INCLUDES_WITH_SYSTEM)
  if(operon_INCLUDES_WITH_SYSTEM)
    set(operon_warning_guard SYSTEM)
  endif()
endif()