cmake_minimum_required (VERSION 3.16) 

# To allow linking to static libs from other directories
cmake_policy(SET CMP0079 NEW)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/lasp/cmake")
include("BuildType")

# This is used for code completion in vim
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
project(LASP LANGUAGES C CXX)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED)
set(CMAKE_C_STANDARD 11)

option(LASP_DOUBLE_PRECISION "Compile as double precision floating point" ON)
option(LASP_HAS_RTAUDIO "Compile with RtAudio Daq backend" ON)
option(LASP_HAS_ULDAQ "Compile with UlDaq backend" ON)

set(LASP_TRACERNAME "defaulttracer" CACHE STRING "Name of tracer variable containing level")
set(LASP_FFT_BACKEND "FFTW" CACHE STRING "FFT Library backend")
set_property(CACHE LASP_FFT_BACKEND PROPERTY STRINGS "FFTW" "FFTPack" "None")

find_package(Python3 COMPONENTS Interpreter Development REQUIRED)
include_directories(${Python3_INCLUDE_DIRS})
find_package(pybind11 CONFIG REQUIRED)

# Required for PYBIND11
set(POSITION_INDEPENDENT_CODE True)

if(CMAKE_BUILD_TYPE STREQUAL Debug)
    set(LASP_DEBUG True)
else()
    set(LASP_DEBUG False)
endif()

if(LASP_PARALLEL)
    add_definitions(-D_REENTRANT)
    set(LASP_THREADING_LIBRARIES pthread)
else()
    set(LASP_THREADING_LIBRARIES "")
endif()

# link openblas
set(BLA_VENDOR OpenBLAS)
find_package(BLAS REQUIRED)

# Armadillo
include_directories(SYSTEM armadillo-code/include)


# Reasonable maximum to the nfft size, at 48kHz this is 700s of data...
add_definitions(-DLASP_MAX_NFFT=33554432) # 2**25

# ####################################### End of user-adjustable variables section

if(LASP_FFT_BACKEND STREQUAL "FFTW")
    find_library(FFTW_LIBRARY NAMES fftw3 fftw)
    set(FFT_LIBRARIES "${FFTW_LIBRARY}")
elseif(LASP_FFT_BACKEND STREQUAL "FFTPack")
    include_directories(fftpack)
    set(FFT_LIBRARIES fftpack)
    add_subdirectory(fftpack)
endif()

# General make flags
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wextra -Wno-type-limits \
-Werror=implicit-function-declaration -Wno-unused-parameter \
-Werror=return-type -Wfatal-errors")

if(CMAKE_SYSTEM_NAME STREQUAL "Windows")
    set(win32 true)
    set(home $ENV{USERPROFILE})
    # set(miniconda_dir ${home}\\Miniconda3)

    message("Building for Windows")
    include_directories(
        ..\\rtaudio
        C:\\mingw\\mingw64\\include\\OpenBLAS
        link_directories(${home}\\miniconda3\\Library\\include)
        )
    set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH} $miniconda_dir\\Lib\\cmake")
    # include(
    add_definitions(-DMS_WIN64)
    link_directories(C:\\mingw\\mingw64\\lib)
    link_directories(C:\\mingw\\mingw64\\bin)
    link_directories(..\\rtaudio)
    link_directories(${home}\\Miniconda3)
    add_definitions(-DHAS_RTAUDIO_WIN_WASAPI_API)
else() # Linux compile
    set(win32 false)
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror=incompatible-pointer-types")
    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wfatal-errors")	
    include_directories(/usr/local/include/rtaudio)
    include_directories(/usr/include/rtaudio)
    link_directories(/usr/local/lib)
    # This should become optional later on, and be added to the windows list as
    # well.

endif()
# The last argument here takes care of calling SIGABRT when an integer overflow
# occures.

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-type-limits")

set(CMAKE_C_FLAGS_RELEASE  "-O2 -mfpmath=sse -march=x86-64 -mtune=native \
-fdata-sections -ffunction-sections -fomit-frame-pointer -finline-functions")

# ############################# End compilation flags


# Add FFTpack dir if used as FFT backend
if(LASP_FFTPACK_BACKEND)
    add_subdirectory(fftpack)
    include_directories(
        fftpack
        )
endif()

include_directories(STL-Threadsafe/include)
include_directories(gsl-lite/include)
include_directories(DebugTrace-cpp/include)

add_subdirectory(lasp)
add_subdirectory(gsl-lite)
add_subdirectory(test)

# set(SETUP_PY_IN "${CMAKE_CURRENT_SOURCE_DIR}/setup.py.in")
set(SETUP_PY    "${CMAKE_CURRENT_BINARY_DIR}/setup.py")

set(DEPS  "${CMAKE_CURRENT_SOURCE_DIR}/*.py"
    "${CMAKE_CURRENT_SOURCE_DIR}/lasp/*.py"
    # "wrappers"
    # "lasp_device_lib")
    )

# set(OUTPUT      "${CMAKE_CURRENT_BINARY_DIR}/build/timestamp")

# # configure_file(${SETUP_PY_IN} ${SETUP_PY})
# add_custom_command(OUTPUT ${OUTPUT}
#     COMMAND ${PYTHON_EXECUTABLE} ${SETUP_PY} build
#     COMMAND ${CMAKE_COMMAND} -E touch ${OUTPUT}
#     DEPENDS ${DEPS})

# add_custom_target(target ALL DEPENDS ${OUTPUT})

# if(DEFINED INSTALL_DEBUG)
#     set(EXTRA_SETUP_ARG --user -e)
# else()
#     set(EXTRA_SETUP_ARG "")
# endif()


# install(CODE "execute_process(COMMAND ${PYTHON_EXECUTABLE} -m pip install ${EXTRA_SETUP_ARG} .)")