cmake_minimum_required(VERSION 3.22)
project(looper VERSION 1.0.0 LANGUAGES C CXX)

if("${CMAKE_SYSTEM_NAME}" STREQUAL "Emscripten")
    set(EMSCRIPTEN ON)
    message("Building for WASM.")
endif()
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(SDL_MIXER_X_STATIC ON CACHE BOOL "")
set(SDL_MIXER_X_SHARED OFF CACHE BOOL "")
set(DOWNLOAD_AUDIO_CODECS_DEPENDENCY OFF CACHE BOOL "")
set(AUDIO_CODECS_BUILD_LOCAL_SDL2 OFF CACHE BOOL "" FORCE)
set(MIXERX_LGPL ON CACHE BOOL "" FORCE)
set(USE_MIDI ON CACHE BOOL "" FORCE)
set(USE_MIDI_NATIVE_ALT OFF CACHE BOOL "" FORCE)
set(USE_MIDI_NATIVE OFF CACHE BOOL "" FORCE)
set(USE_MIDI_TIMIDITY OFF CACHE BOOL "" FORCE)
set(USE_MIDI_FLUIDLITE OFF CACHE BOOL "" FORCE)
set(USE_MIDI_OPNMIDI OFF CACHE BOOL "" FORCE)
set(USE_MIDI_ADLMIDI OFF CACHE BOOL "" FORCE)
set(USE_MIDI_FLUIDSYNTH ON CACHE BOOL "" FORCE)
set(CMAKE_C_STANDARD 99)
set(CMAKE_C_STANDARD_REQUIRED ON)
set(BUILD_FB2K OFF CACHE BOOL "" FORCE)
set(BUILD_CLI OFF CACHE BOOL "" FORCE)
set(BUILD_WINAMP OFF CACHE BOOL "" FORCE)
set(BUILD_XMPLAY OFF CACHE BOOL "" FORCE)
set(BUILD_AUDACIOUS OFF CACHE BOOL "" FORCE)
set(BUILD_V123 OFF CACHE BOOL "" FORCE)
set(JSONCPP_WITH_TESTS OFF CACHE BOOL "" FORCE)
set(BUILD_STATIC_LIBS ON CACHE BOOL "" FORCE)
set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
set(JSONCPP_WITH_PKGCONFIG_SUPPORT OFF CACHE BOOL "" FORCE)
set(JSONCPP_WITH_CMAKE_PACKAGE OFF CACHE BOOL "" FORCE)
option(ENABLE_DBUS "Enables DBus support" ON)
option(USE_PORTALS "Enables libportal" ON)
if (DEFINED EMSCRIPTEN)
    set(BUILD_STATIC ON CACHE BOOL "" FORCE)
    set(ENABLE_DBUS OFF CACHE BOOL "" FORCE)
    set(DOWNLOAD_AUDIO_CODECS_DEPENDENCY ON CACHE BOOL "" FORCE)
    set(SDL_MIXER_X_SHARED OFF CACHE BOOL "" FORCE)
    set(SDL_MIXER_X_STATIC ON CACHE BOOL "" FORCE)
    set(USE_OGG_VORBIS_STB ON CACHE BOOL "" FORCE)
    set(USE_OPUS OFF CACHE BOOL "" FORCE)
    set(USE_MODPLUG OFF CACHE BOOL "" FORCE)
    set(USE_GME OFF CACHE BOOL "" FORCE)
    set(USE_WAVPACK OFF CACHE BOOL "" FORCE)
    set(USE_XMP OFF CACHE BOOL "" FORCE)
    set(USE_MIDI_EDMIDI OFF CACHE BOOL "" FORCE)
    set(USE_PORTALS OFF CACHE BOOL "" FORCE)
    set(USE_SYSTEM_SDL2 ON CACHE BOOL "" FORCE)
    set(USE_MPEG OFF CACHE BOOL "" FORCE)
    set(USE_CELT OFF CACHE BOOL "" FORCE)
    set(USE_ATRAC9 OFF CACHE BOOL "" FORCE)
    set(USE_SPEEX OFF CACHE BOOL "" FORCE)
    set(USE_G719 OFF CACHE BOOL "" FORCE)
    set(EXTRA_FLAGS "-sUSE_VORBIS -sUSE_MPG123=1 -sUSE_ZLIB -sUSE_OGG=1 -sUSE_MODPLUG=1 -sUSE_SDL=2 -sUSE_SDL_IMAGE=2 --shell-file=${CMAKE_CURRENT_SOURCE_DIR}/web/shell.html --js-library=${CMAKE_CURRENT_SOURCE_DIR}/web/api.js")
    set(DEBUG_INFO ${CMAKE_BUILD_TYPE} STREQUAL Debug OR ${CMAKE_BUILD_TYPE} STREQUAL RelWithDebInfo)
    set(RELASE_OPTS ${CMAKE_BUILD_TYPE} STREQUAL Release OR ${CMAKE_BUILD_TYPE} STREQUAL RelWithDebInfo)
    set(PROFILE_ENABLED ${CMAKE_BUILD_TYPE} STREQUAL RelWithDebInfo)
    set(EXTRA_LINKER_FLAGS "-sALLOW_MEMORY_GROWTH=1  -sEXPORTED_RUNTIME_METHODS=UTF8ToString,stringToUTF8,lengthBytesUTF8 -sEXPORTED_FUNCTIONS=_malloc,_main -sASYNCIFY_IMPORTS=read_file,read_storage,write_storage,remove_storage,find_keys")
    set(OPENMP OFF CACHE BOOL "" FORCE)
    set(SOUNDSTRETCH OFF CACHE BOOL "" FORCE)
    set(SOUNDTOUCH_DLL OFF CACHE BOOL "" FORCE)
    if(DEBUG_INFO)
        option(STACK_OVERFLOW_CHECK "Enables extra stack overflow checks" OFF)
        if(${STACK_OVERFLOW_CHECK})
            set(EXTRA_LINKER_FLAGS "${EXTRA_LINKER_FLAGS} -sSTACK_OVERFLOW_CHECK=2")
        endif()
        set(EXTRA_FLAGS "${EXTRA_FLAGS} -g -gsource-map")
        set(EXTRA_LINKER_FLAGS "${EXTRA_LINKER_FLAGS} --emit-symbol-map -sASSERTIONS=1")
    endif()
    if(RELEASE_OPTS)
        set(EXTRA_FLAGS "${EXTRA_FLAGS} -flto")
        set(EXTRA_LINKER_FLAGS "${EXTRA_LINKER_FLAGS} --closure 1")
    endif()
    if(PROFILE_ENABLED)
        set(EXTRA_LINKER_FLAGS "${EXTRA_LINKER_FLAGS} --profiling --profiling-funcs")
    endif()
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${EXTRA_FLAGS}")
    set(EXTRA_LINKER_FLAGS "${EXTRA_LINKER_FLAGS} ${EXTRA_FLAGS}")
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${EXTRA_LINKER_FLAGS}")
    set(CMAKE_FIND_ROOT_PATH "${CMAKE_CURRENT_SOURCE_DIR}/web/cmake" ${CMAKE_FIND_ROOT_PATH})
    set(SDL2_DIR ${CMAKE_CURRENT_SOURCE_DIR}/web/cmake)
else()
    set(BUILD_STATIC OFF CACHE BOOL "")
endif()
option(BUILD_SDL "Enables built-in SDL" OFF)
option(BUILD_SDL_IMAGE "Enables built-in SDL_image" ${BUILD_SDL})
if(DEFINED ANDROID_NDK)
    set(USE_SYSTEM_SDL2 ON CACHE BOOL "" FORCE)
    set(AUDIOCODECS_BUILD_TIMIDITYSDL OFF CACHE BOOL "" FORCE)
    set(AUDIOCODECS_BUILD_OPUS OFF CACHE BOOL "" FORCE)
    set(USE_OGG_VORBIS_STB ON CACHE BOOL "" FORCE)
    set(AUDIOCODECS_BUILD_WAVPACK OFF CACHE BOOL "" FORCE)
    set(USE_WAVPACK OFF CACHE BOOL "" FORCE)
    set(USE_MODPLUG OFF CACHE BOOL "" FORCE)
    set(USE_XMP OFF CACHE BOOL "" FORCE)
    set(USE_GME OFF CACHE BOOL "" FORCE)
    set(USE_MIDI_EDMIDI OFF CACHE BOOL "" FORCE)
    set(USE_OPUS OFF CACHE BOOL "" FORCE)
    set(USE_MPEG OFF CACHE BOOL "" FORCE)
    set(USE_CELT OFF CACHE BOOL "" FORCE)
    set(USE_ATRAC9 OFF CACHE BOOL "" FORCE)
    set(USE_SPEEX OFF CACHE BOOL "" FORCE)
    set(USE_G719 OFF CACHE BOOL "" FORCE)
    set(USE_VORBIS OFF CACHE BOOL "" FORCE)
endif()
if (BUILD_SDL)
    set(SDL_SHARED OFF CACHE BOOL "" FORCE)
    set(SDL_STATIC ON CACHE BOOL "" FORCE)
    set(SDL_TEST OFF CACHE BOOL "" FORCE)
    set(USE_SYSTEM_SDL2 ON CACHE BOOL "" FORCE)
    set(SDL_MIXER_X_STATIC ON CACHE BOOL "" FORCE)
    add_subdirectory(${CMAKE_SOURCE_DIR}/subprojects/SDL)
    install(TARGETS SDL2-static SDL2main EXPORT SDL_EXPORTS)
    install(EXPORT SDL_EXPORTS DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
    export(TARGETS SDL2-static sdl-build-options SDL2main FILE ${CMAKE_CURRENT_BINARY_DIR}/SDL2Config.cmake NAMESPACE SDL2)
    set(SDL2_DIR ${CMAKE_CURRENT_SOURCE_DIR}/cmake/built_sdl)
endif()
if (BUILD_SDL_IMAGE)
    set(BUILD_SHARED_LIBS OFF CACHE BOOL "" FORCE)
    set(SDL2IMAGE_SAMPLES OFF CACHE BOOL "" FORCE)
    set(SDL2IMAGE_TESTS OFF CACHE BOOL ""  FORCE)
    add_subdirectory(${CMAKE_SOURCE_DIR}/subprojects/SDL_image)
    set(SDL2_image_DIR ${CMAKE_CURRENT_SOURCE_DIR}/cmake/built_sdl_image)
endif()
find_package(PkgConfig)
#add_subdirectory(subprojects/jsoncpp)

include(GNUInstallDirs)
add_subdirectory(subprojects/SDL-Mixer-X)
add_subdirectory(subprojects/vgmstream)

if (DEFINED EMSCRIPTEN)
    set(EXTRA_LIBS )
else()
    set(EXTRA_LIBS libvgmstream_shared)
endif()
if(SDL_MIXER_X_STATIC)
    set(SDL_MIXER_X_TARGET SDL2_mixer_ext_Static)
else()
    set(SDL_MIXER_X_TARGET SDL2_mixer_ext)
    set(EXTRA_LIBS ${EXTRA_LIBS} ${SDL_MIXER_X_TARGET})
endif()
add_custom_target(looper_assets COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/assets/update_assets.py WORKING_DIRECTORY ${CMAKE_SOURCE_DIR})
find_package(Git)
if (Git_FOUND)
    execute_process(COMMAND ./version.sh OUTPUT_VARIABLE TAG WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
    message("" ${TAG})
else()
    set(TAG "unknown")
endif()
if(CMAKE_BUILD_TYPE STREQUAL "Debug")
	set(DEBUG ON)
endif()

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
include(log)
#execute_process(COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/meson2cmake_cfg.py ${CMAKE_CURRENT_SOURCE_DIR}/config.meson.h.in ${CMAKE_CURRENT_SOURCE_DIR}/config.cmake.h.in)
set(DEBUG_MODE_VALUE ${DEBUG})
configure_file(config.cmake.h.in config.h)

macro(target_pkgconfig)
    push_fnstack("target_pkgconfig")
    cmake_parse_arguments(PARSED_ARGS "OPTIONAL;PRIVATE;PUBLIC;INTERFACE" "PREFIX" "TARGETS;LIBRARIES" ${ARGN})
    if (NOT ${PARSED_ARGS_PREFIX})
        warning(MESSAGE "No prefix specified for reading thie PKGConfig variable to. Attempting to guess it from the library specification...")
        if (NOT ${PARSED_ARGS_LIBRARIES})
            fatal(MESSAGE "... But it turns out no library specification was specified. Giving up.")
        else()
            set(PARSED_ARGS_PREFIX ${PARSED_ARGS_LIBRARIES})
        endif()
    else()
        if(NOT ${PARSED_ARGS_NAME})
            warning(MESSAGE "No library name was specified. Assuming it is the same as the prefix.")
            set(PARSED_ARGS_LIBSPEC ${PARSED_ARGS_LIBRARIES})
        endif()
    endif()
    pkg_check_modules(${PARSED_ARGS_PREFIX} IMPORTED_TARGET ${PARSED_ARGS_LIBRARIES})
    set(PARSED_ARGS_PUBLICITY PRIVATE)
    if(${PARSED_ARGS_PRIVATE})
        set(PARSED_ARGS_PUBLICITY PRIVATE)
    elseif(${PARSED_ARGS_PUBLIC})
        set(PARSED_ARGS_PUBLICITY PUBLIC)
    elseif(${PARSED_ARGS_INTERFACE})
        set(PARSED_ARGS_PUBLICITY INTERFACE)
    endif()
    foreach(TARGET IN ITEMS ${PARSED_ARGS_TARGETS})
        target_link_libraries(${TARGET} ${PARSED_ARGS_PUBLICITY} PkgConfig::${PARSED_ARGS_PREFIX})
    endforeach()
    pop_fnstack()
endmacro()
set(INC ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR} subprojects/vgmstream/src subprojects/vgmstream/src/base)
set(UI_BACKENDS "")
list(POP_FRONT UI_BACKENDS)
macro(prefix_all)
    set(ARGS ${ARGV})
    list(POP_FRONT ARGS OUT_VAR PREFIX)
    set(${OUT_VAR} )
    foreach(ARG IN ITEMS ${ARGS})
        list(APPEND ${OUT_VAR} ${PREFIX}${ARG})
    endforeach()
endmacro()
prefix_all(LIBRARY_SOURCES
    ${CMAKE_CURRENT_SOURCE_DIR}/
    backend.cpp
    options.cpp
    playback.cpp
    util.cpp
    log.cpp
    dbus.cpp
    translation.cpp
)
add_library(liblooper STATIC ${LIBRARY_SOURCES})
target_include_directories(liblooper PUBLIC ${INC})
set(JSONCPP_TARGET PkgConfig::jsoncpp)
set(SOUNDTOUCH_TARGET PkgConfig::SoundTouch)
function(set_to_value_of_condition var)
    if (${ARGN})
        set(${var} ON PARENT_SCOPE)
    else()
        set(${var} OFF PARENT_SCOPE)
    endif()
endfunction()
set_to_value_of_condition(BUILD_THIRDPARTY DEFINED EMSCRIPTEN OR DEFINED ANDROID_NDK)
find_package(Intl)
set_to_value_of_condition(_USE_LIBINTL_LITE NOT Intl_FOUND)
option(BUILD_JSONCPP "Builds JsonCpp instead of using the system package." ${BUILD_THIRDPARTY})
option(BUILD_SOUNDTOUCH "Builds SoundTouch instead of using the system package" ${BUILD_THIRDPARTY})
option(USE_LIBINTL_LITE "Set to ON to build and use libintl-lite" ${_USE_LIBINTL_LITE})
set(LIBINTL_LIBRARY)
set(LIBINTL_INCDIRS)
if(BUILD_JSONCPP)
    add_subdirectory(subprojects/jsoncpp)
    set(JSONCPP_TARGET jsoncpp_static)
endif()
if(BUILD_SOUNDTOUCH)
    add_subdirectory(subprojects/soundtouch)
    set(SOUNDTOUCH_TARGET SoundTouch)
endif()
if(USE_LIBINTL_LITE)
    add_subdirectory(subprojects/libintl-lite)
    set(LIBINTL_LIBRARY intl CACHE INTERNAL "")
    set(LIBINTL_INCDIRS "subprojects/libintl-lite" CACHE INTERNAL "")
else()
    find_package(Intl REQUIRED)
    set(LIBINTL_LIBRARY Intl::Intl CACHE INTERNAL "")
    set(LIBINTL_INCDIRS ${Intl_INCLUDE_DIRS} CACHE INTERNAL "")
endif()

if (DEFINED ANDROID_NDK)
    add_subdirectory(subprojects/oboe)
    target_link_libraries(liblooper PUBLIC oboe)
endif()
target_include_directories(liblooper PUBLIC ${LIBINTL_INCDIRS})
target_link_libraries(liblooper PUBLIC ${LIBINTL_LIBRARY})
if(DEFINED EMSCRIPTEN)
    target_link_libraries(liblooper PUBLIC ${SDL_MIXER_X_TARGET} ${SOUNDTOUCH_TARGET} libvgmstream ${JSONCPP_TARGET})
    target_compile_options(liblooper PUBLIC "-sUSE_SDL=2")
else()
    if(NOT BUILD_SOUNDTOUCH)
        pkg_check_modules(SoundTouch IMPORTED_TARGET soundtouch)
    endif()
    if (NOT BUILD_JSONCPP)
        pkg_check_modules(jsoncpp IMPORTED_TARGET jsoncpp)
    endif()
    if (NOT BUILD_SDL)
        find_package(SDL2 REQUIRED)
    endif()
    if (ENABLE_DBUS)
        find_package(sdbus-c++)
        if(NOT ${sdbus-c++_FOUND}) 
            set(ENABLE_DBUS OFF)
            message("Warning: Dbus support not found - Not enabling DBus")
        endif()
    endif()
    set(SDL2_TARGET SDL2::SDL2)
    if (TARGET SDL2-static)
        set(SDL2_TARGET SDL2-static)
    endif()
    target_link_libraries(liblooper PUBLIC ${SDL2_TARGET} SDL2main ${SDL_MIXER_X_TARGET} ${SOUNDTOUCH_TARGET} libvgmstream libvgmstream_shared ${JSONCPP_TARGET})
endif()
if (${ENABLE_DBUS})
    target_link_libraries(liblooper PUBLIC SDBusCpp::sdbus-c++)
    target_compile_definitions(liblooper PUBLIC DBUS_ENABLED)
endif()
macro(add_ui_backend)
    set(ARGS ${ARGV})
    list(POP_FRONT ARGS target)
    add_library(${target} STATIC ${ARGS})
    message("Enabling UI backend '" ${target} "'...")
    list(APPEND UI_BACKENDS ${target})
    set(UI_BACKENDS ${UI_BACKENDS} PARENT_SCOPE)
    add_dependencies(${target} looper_assets)
    target_include_directories(${target} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR} ${CMAKE_CURRENT_BINARY_DIR} ${INC})
    target_link_libraries(${target} PRIVATE liblooper)
    if(${USE_PORTALS})
        target_pkgconfig(TARGETS ${target} PRIVATE PREFIX libPortal LIBRARIES libportal)
        if (NOT ${libPortal_FOUND} EQUAL "1")
            set(USE_PORTALS OFF)
        else()
            info("Enabling libportal support...")
            target_compile_definitions(imgui_ui PRIVATE "PORTALS")
        endif()
    endif()
endmacro()
macro(ui_backend_subdir)
    cmake_parse_arguments(UI_OPTS "" "SUBDIR;NAME;READABLE_NAME" "" ${ARGN} )
    message("Backend ${UI_OPTS_READABLE_NAME} defined...")
    set(UI_DISABLE_OPT DISABLE_${UI_OPTS_NAME}_UI)
    option(${UI_DISABLE_OPT} "Disables the ${UI_OPTS_READABLE_NAME} UI" OFF)
    if (NOT ${${UI_DISABLE_OPT}})
        cmake_path(GET UI_OPTS_SUBDIR STEM UI_OPTS_DIRNAME)
        set(BASE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/${UI_OPTS_SUBDIR})
        add_subdirectory(${UI_OPTS_SUBDIR})
        list(APPEND ENABLED_UIS "${UI_OPTS_DIRNAME}")
        message("Enabled backend ${UI_OPTS_READABLE_NAME}.")
    else()
        message("Disabled backend ${UI_OPTS_READABLE_NAME}")
    endif()
endmacro()
set(ENABLED_UIS )
ui_backend_subdir(NAME "IMGUI" READABLE_NAME "Dear ImGui" SUBDIR backends/ui/imgui)
if (NOT (DEFINED EMSCRIPTEN OR DEFINED ANDROID_NDK))
    ui_backend_subdir(NAME "GTK" READABLE_NAME "GTK4" SUBDIR backends/ui/gtk)
endif()
execute_process(COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/gen_ui_backend_inc.py ${CMAKE_CURRENT_BINARY_DIR} ${ENABLED_UIS})
prefix_all(SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/ main.cpp daemon_backend.cpp proxy_backend.cpp)
list(APPEND SOURCES ${CMAKE_CURRENT_BINARY_DIR}/backend_glue.cpp)
if(DEFINED EMSCRIPTEN)
    set(CMAKE_EXECUTABLE_SUFFIX ".html")
endif()

set(TARGET_NAME looper)
if(DEFINED EMSCRIPTEN)
    set(TARGET_NAME index)
endif()
function(copy_to_bindir src dst)
    add_custom_command(TARGET ${TARGET_NAME} POST_BUILD COMMAND ${CMAKE_COMMAND} -E copy "${CMAKE_CURRENT_SOURCE_DIR}/${src}" "$<TARGET_FILE_DIR:${TARGET_NAME}>/${dst}")
endfunction()
if (DEFINED ANDROID_NDK)
    add_library(${TARGET_NAME} SHARED ${SOURCES})
else()
    add_executable(${TARGET_NAME} ${SOURCES})
endif()
add_dependencies(${TARGET_NAME} looper_assets ${UI_BACKENDS})

if(DEFINED EMSCRIPTEN)
    copy_to_bindir(assets/icon.svg icon.svg)
    copy_to_bindir(assets/icon.png icon.png)
    copy_to_bindir(web/shell.js shell.js)
endif()
find_program(ASCLI_EXE NAMES "appstreamcli" NO_CACHE)
if(${ASCLI_EXE} STREQUAL "ASCLIEXE-NOTFOUND")
    message("Cannot verify Appstream Metadata.")
else()
    add_test(NAME "verify appstream metadata" COMMAND ${ASCLI_EXE} validate --no-net --pedantic "assets/com.complecwaft.Looper.metainfo.xml")
endif()
target_link_libraries(${TARGET_NAME} PUBLIC liblooper ${UI_BACKENDS})
install(TARGETS ${TARGET_NAME} ${EXTRA_LIBS})
if (${BUILD_SDL2}) 
    install(EXPORT SDL2-static SDL2main)
endif()
if (NOT DEFINED EMSCRIPTEN)
    install(FILES assets/icon.svg DESTINATION ${CMAKE_INSTALL_DATADIR}/icons/hicolor/scalable/apps/)
    install(FILES assets/com.complecwaft.Looper.desktop DESTINATION ${CMAKE_INSTALL_DATADIR}/applications)
    install(FILES assets/com.complecwaft.Looper.metainfo.xml DESTINATION ${CMAKE_INSTALL_DATADIR}/metainfo)
    install(DIRECTORY assets/translations/ TYPE LOCALE PATTERN "*" EXCLUDE PATTERN "looper.pot")
endif()