cmake_minimum_required(VERSION 3.20)
set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
set(CMAKE_POLICY_DEFAULT_CMP0069 NEW)

project(ecgsyn.js)

option(BUILD_WITH_EMSCRIPTEN "Build with Emscripten" ON)
option(BUILD_SHARED_LIBS "Build shared libraries" OFF)

if(BUILD_WITH_EMSCRIPTEN)

  set(EMSCRIPTEN_ROOT $ENV{EMSDK})
  if(NOT EMSCRIPTEN_ROOT)
    set(EMSCRIPTEN_ROOT /usr/lib/emscripten)
  endif()

  set(EMSCRIPTEN_ROOT
      "${EMSCRIPTEN_ROOT}"
      CACHE PATH "Emscripten SDK path")

  set(CMAKE_TOOLCHAIN_FILE
      "${EMSCRIPTEN_ROOT}/cmake/Modules/Platform/Emscripten.cmake"
      CACHE FILEPATH "Emscripten toolchain file")

  set(BUILD_SHARED_LIBS OFF FORCE)
endif(BUILD_WITH_EMSCRIPTEN)

set(CMAKE_C_STANDARD 99)
set(CMAKE_CXX_STANDARD 20)

set(PFFFT_USE_TYPE_FLOAT
    OFF
    CACHE BOOL "activate pffft float" FORCE)

include(CheckIPOSupported)
check_ipo_supported(RESULT ipo_supported)
if(ipo_supported)
  set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE ON)
endif()

if(BUILD_WITH_EMSCRIPTEN)
  include_directories(BEFORE SYSTEM compat)

  add_compile_options(-msimd128 -msse -mavx -fwasm-exceptions)
  set(ecgsyn_link_options # -flto
      -fwasm-exceptions
      -sEXPORTED_FUNCTIONS=_rr_gen_new,_rr_gen_new_series,_destroy_obj,_ecgsyn,_realloc,_free
      --no-entry
      -sSTRICT
      -sNO_ASSERTIONS
      -sNO_FILESYSTEM
      -sMALLOC=emmalloc)

else()
  set(TARGET_C_ARCH haswell)
  set(TARGET_CXX_ARCH haswell)

  set(ecgsyn_defs ECGSYN_HOST_BUILD)
endif()

add_subdirectory(mini-odeint EXCLUDE_FROM_ALL)
add_subdirectory(pffft EXCLUDE_FROM_ALL)

add_executable(ecgsyn ecgsyn.cpp)
target_compile_definitions(ecgsyn PRIVATE PFFFT_ENABLE_DOUBLE ${ecgsyn_defs})
target_link_options(ecgsyn PRIVATE ${ecgsyn_link_options})
target_link_libraries(ecgsyn PRIVATE PFFFT mini-odeint)

if(BUILD_WITH_EMSCRIPTEN)
  set_target_properties(ecgsyn PROPERTIES SUFFIX ".wasm")
endif(BUILD_WITH_EMSCRIPTEN)