cmake_minimum_required(VERSION 3.23)

# Get the version from the meson file
file(READ ${CMAKE_CURRENT_SOURCE_DIR}/meson.build CONTENT)
string(REGEX MATCH "    version : '([0-9]+).([0-9]+).([0-9]+)'" VERSION_REGEX "${CONTENT}")
set(MESON_RELEASE_VERSION_MAJOR ${CMAKE_MATCH_1})
set(MESON_RELEASE_VERSION_MINOR ${CMAKE_MATCH_2})
set(MESON_RELEASE_VERSION_PATCH ${CMAKE_MATCH_3})

project(spatialaudio VERSION ${MESON_RELEASE_VERSION_MAJOR}.${MESON_RELEASE_VERSION_MINOR}.${MESON_RELEASE_VERSION_PATCH})

# Options
option(BUILD_SHARED_LIBS "Build shared instead of static libraries" ON)
option(HAVE_MIT_HRTF "Should MIT HRTF be built-in" ON)

include(GNUInstallDirs)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")

# Dependencies
find_package(MySofa QUIET)

# Get API version from header
file(READ "include/SpatialaudioVersion.h" SPAUDIO_VER_HEADER)
foreach(VERPART "MAJOR" "MINOR" "PATCH")
    if(SPAUDIO_VER_HEADER MATCHES "#define SPATIALAUDIO_API_VERSION_${VERPART} ([0-9]+)")
        set("SPAUDIO_API_${VERPART}" ${CMAKE_MATCH_1})
    else()
        message(FATAL_ERROR "Unable to get SPATIALAUDIO_API_VERSION_${VERPART}")
    endif()
endforeach()

set(SPAUDIO_API "${SPAUDIO_API_MAJOR}.${SPAUDIO_API_MINOR}.${SPAUDIO_API_PATCH}")
message(STATUS
    "libspatialaudio API version ${SPAUDIO_API}")

set_property(DIRECTORY APPEND PROPERTY
    CMAKE_CONFIGURE_DEPENDS "include/SpatialaudioVersion.h")

# Spatialaudio library
add_library(spatialaudio)
add_library(Spatialaudio::spatialaudio ALIAS spatialaudio)
set_target_properties(spatialaudio
    PROPERTIES
        OUTPUT_NAME spatialaudio
        POSITION_INDEPENDENT_CODE ON
        VERSION "${SPAUDIO_API}"
        SOVERSION ${SPAUDIO_API_MAJOR}
        C_VISIBILITY_PRESET hidden
        CXX_VISIBILITY_PRESET hidden
)
target_compile_features(spatialaudio PUBLIC cxx_std_14)
target_sources(spatialaudio
    PRIVATE
        source/AmbisonicEncoder.cpp
        source/AmbisonicMicrophone.cpp
        source/AmbisonicCommons.cpp
        source/mit_hrtf/mit_hrtf_lib.c
        source/AmbisonicProcessor.cpp
        source/AmbisonicRotator.cpp
        source/AmbisonicDecoder.cpp
        source/AmbisonicBinauralizer.cpp
        source/AmbisonicSource.cpp
        source/AmbisonicShelfFilters.cpp
        source/AmbisonicOptimFilters.cpp
        source/hrtf/mit_hrtf.cpp
        source/hrtf/sofa_hrtf.cpp
        source/BFormat.cpp
        source/SpeakersBinauralizer.cpp
        source/kiss_fft/kiss_fftr.c
        source/kiss_fft/kiss_fft.c
        source/AmbisonicAllRAD.cpp
        source/AmbisonicBase.cpp
        source/AmbisonicSpeaker.cpp
        source/AmbisonicEncoderDist.cpp
        source/AmbisonicZoomer.cpp
        source/Decorrelator.cpp
        source/adm/DirectSpeakersGainCalc.cpp
        source/Renderer.cpp
        source/adm/AllocentricPannerGainCalc.cpp
        source/adm/AllocentricExtent.cpp
        source/adm/GainCalculator.cpp
        source/GainInterp.cpp
        source/PointSourcePannerGainCalc.cpp
        source/adm/PolarExtent.cpp
        source/RegionHandlers.cpp
        source/Screen.cpp
        source/ObjectPanner.cpp
        source/dsp/IIRFilter.cpp
        source/dsp/LinkwitzRileyIIR.cpp
        source/LoudspeakerLayouts.cpp

    PUBLIC
        FILE_SET HEADERS
        TYPE HEADERS
        BASE_DIRS
            include
            source
        FILES
            include/adm/Conversions.h
            include/adm/MappingRules.h
            include/adm/CartesianLoudspeakerLayouts.h
            include/adm/DirectSpeakersGainCalc.h
            include/RendererMetadata.h
            include/Renderer.h
            include/adm/AllocentricPannerGainCalc.h
            include/adm/AllocentricExtent.h
            include/AmbisonicAllRAD.h
            include/AmbisonicBase.h
            include/AmbisonicBinauralizer.h
            include/AmbisonicCommons.h
            include/AmbisonicDecoder.h
            include/AmbisonicEncoderDist.h
            include/AmbisonicEncoder.h
            include/AmbisonicMicrophone.h
            include/AmbisonicProcessor.h
            include/AmbisonicRotator.h
            include/Ambisonics.h
            include/AmbisonicShelfFilters.h
            include/AmbisonicOptimFilters.h
            include/AmbisonicSource.h
            include/AmbisonicSpeaker.h
            include/AmbisonicZoomer.h
            include/BFormat.h
            include/Coordinates.h
            include/Decorrelator.h
            include/adm/GainCalculator.h
            include/GainInterp.h
            include/hrtf/hrtf.h
            include/hrtf/mit_hrtf.h
            include/hrtf/sofa_hrtf.h
            include/LoudspeakerLayouts.h
            include/PointSourcePannerGainCalc.h
            include/adm/PolarExtent.h
            include/RegionHandlers.h
            include/Screen.h
            include/ScreenCommon.h
            include/SpeakersBinauralizer.h
            include/Tools.h
            include/ObjectPanner.h
            include/kiss_fft/kiss_fft.h
            include/kiss_fft/kiss_fftr.h
            include/dsp/IIRFilter.h
            include/dsp/LinkwitzRileyIIR.h
            include/SpatialaudioAPI.h
            include/SpatialaudioVersion.h
)

# Generate config header
set(SPATIALAUDIO_SUPPORTS_SOFA ${MYSOFA_FOUND})
set(SPATIALAUDIO_SUPPORTS_MIT_HRTF ${HAVE_MIT_HRTF})
if(NOT BUILD_SHARED_LIBS)
    set(SPATIALAUDIO_STATIC YES)
endif()

configure_file(
    "include/SpatialaudioConfig.h.in"
    "include/SpatialaudioConfig.h"
)

target_sources(spatialaudio
    PUBLIC
        FILE_SET generated_headers
        TYPE HEADERS
        BASE_DIRS $<TARGET_PROPERTY:BINARY_DIR>/include
        FILES
            ${CMAKE_CURRENT_BINARY_DIR}/include/SpatialaudioConfig.h
)

target_include_directories(spatialaudio
    PUBLIC
        $<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>
)
target_compile_definitions(spatialaudio
    PRIVATE
        SPATIALAUDIO_COMPILATION
)

if(MYSOFA_FOUND)
    message("Found mysofa!")
    set(MYSOFA_LIB "-L${MYSOFA_LIBRARY_DIRS} -lmysofa")
    set(MYSOFA_INCLUDE "-I${MYSOFA_INCLUDE_DIRS}")
    target_include_directories(spatialaudio
        PUBLIC ${MYSOFA_INCLUDE_DIRS})
    target_link_libraries(spatialaudio ${MYSOFA_LIBRARIES})
endif(MYSOFA_FOUND)

configure_file(
    "${CMAKE_CURRENT_SOURCE_DIR}/cmake/spatialaudio.pc.cmake"
    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
    @ONLY
)

install(TARGETS spatialaudio
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
    FILE_SET HEADERS
        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/spatialaudio
    FILE_SET generated_headers
        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/spatialaudio
)
install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc"
    DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)

enable_testing()
add_subdirectory(tests)

# Tarballs generation
set(CPACK_PACKAGE_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
set(CPACK_PACKAGE_VERSION_MINOR ${PROJECT_VERSION_MINOR})
set(CPACK_PACKAGE_VERSION_PATCH ${PROJECT_VERSION_PATCH})
set(CPACK_SOURCE_PACKAGE_FILE_NAME
    "${CMAKE_PROJECT_NAME}-${PROJECT_VERSION}")
set(CPACK_SOURCE_GENERATOR "TBZ2")
list(APPEND CPACK_SOURCE_IGNORE_FILES
    "/build.*/"
    "/\\\\..+"
)
include(CPack)