if(PLATFORM_WIN32 OR PLATFORM_LINUX)
    cmake_minimum_required (VERSION 3.13)
    option(DILIGENT_INSTALL_SAMPLES "Enable installation of samples and tutorials" ON)
else()
    cmake_minimum_required (VERSION 3.6)
    set(DILIGENT_INSTALL_SAMPLES OFF)
endif()

option(DILIGENT_BUILD_SAMPLE_BASE_ONLY "Build only SampleBase project" OFF)

function(add_sample_app APP_NAME IDE_FOLDER SOURCE INCLUDE SHADERS ASSETS)

    set_source_files_properties(${SHADERS} PROPERTIES VS_TOOL_OVERRIDE "None")
    set(ALL_ASSETS ${ASSETS} ${SHADERS})
    add_target_platform_app(${APP_NAME} "${SOURCE}" "${INCLUDE}" "${ALL_ASSETS}")

    set_source_files_properties(${ALL_ASSETS} PROPERTIES 
        VS_DEPLOYMENT_LOCATION "."
        MACOSX_PACKAGE_LOCATION "Resources" 
    )

    if(PLATFORM_WIN32)
        set_target_properties(${APP_NAME} PROPERTIES 
            VS_DEBUGGER_WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}/assets"
        )
        copy_required_dlls(${APP_NAME})
        append_sample_base_win32_source(${APP_NAME})
    elseif(PLATFORM_UNIVERSAL_WINDOWS)
            append_sample_base_uwp_source(${APP_NAME})
    endif()

    target_include_directories(${APP_NAME}
    PRIVATE	
        src
    )

    target_link_libraries(${APP_NAME}
    PRIVATE
        # On Linux we must have Diligent-NativeAppBase go first, otherwise the linker 
        # will fail to resolve Diligent::CreateApplication() function.
        Diligent-NativeAppBase
        Diligent-BuildSettings
        Diligent-SampleBase
    )
    set_common_target_properties(${APP_NAME})

    if(MSVC)
        # Disable MSVC-specific warnings
        # - w4201: nonstandard extension used: nameless struct/union
        target_compile_options(${APP_NAME} PRIVATE /wd4201)
    endif()

    set_target_properties(${APP_NAME} PROPERTIES
        FOLDER ${IDE_FOLDER}
    )

    source_group("src" FILES ${SOURCE} ${INCLUDE})
    source_group("assets" FILES ${ALL_ASSETS})	

    target_sources(${APP_NAME} PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/readme.md")
    set_source_files_properties(
        "${CMAKE_CURRENT_SOURCE_DIR}/readme.md" PROPERTIES HEADER_FILE_ONLY TRUE
    )

    if(PLATFORM_WIN32 OR PLATFORM_LINUX)
        # Copy assets to target folder
        add_custom_command(TARGET ${APP_NAME} POST_BUILD
            COMMAND ${CMAKE_COMMAND} -E copy_directory
                "${CMAKE_CURRENT_SOURCE_DIR}/assets"
                "\"$<TARGET_FILE_DIR:${APP_NAME}>\"")
    endif()

    if(DILIGENT_INSTALL_SAMPLES)
        # Install instructions
        file(RELATIVE_PATH TUTORIAL_REL_PATH "${CMAKE_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}")
        install(TARGETS     ${APP_NAME}
                DESTINATION "${CMAKE_INSTALL_BINDIR}/${TUTORIAL_REL_PATH}/$<CONFIG>")

        if(PLATFORM_LINUX OR PLATFORM_WIN32)
            install(DIRECTORY   "${CMAKE_CURRENT_SOURCE_DIR}/assets/"
                    DESTINATION "${CMAKE_INSTALL_BINDIR}/${TUTORIAL_REL_PATH}/$<CONFIG>")
        endif()

        if(PLATFORM_WIN32)
            get_supported_backends(BACKEND_LIBRARIES)
            install(TARGETS  ${BACKEND_LIBRARIES}
                    RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}/${TUTORIAL_REL_PATH}/$<CONFIG>"
                    LIBRARY DESTINATION "${CMAKE_INSTALL_BINDIR}/${TUTORIAL_REL_PATH}/$<CONFIG>"
                    ARCHIVE DESTINATION "${CMAKE_INSTALL_BINDIR}/${TUTORIAL_REL_PATH}/$<CONFIG>")
        endif()

        if(PLATFORM_LINUX)
            set_target_properties(${APP_NAME} PROPERTIES
                INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}/${DILIGENT_CORE_DIR}/${CMAKE_BUILD_TYPE}"
            )
        endif()
    endif()

endfunction()

add_subdirectory(ThirdParty)

if(TARGET Diligent-NativeAppBase AND TARGET Diligent-TextureLoader AND TARGET Diligent-Imgui)
    add_subdirectory(SampleBase)
endif()

if(NOT ${DILIGENT_BUILD_SAMPLE_BASE_ONLY} AND TARGET Diligent-SampleBase)
    add_subdirectory(Samples)
    add_subdirectory(Tutorials)
endif()


# Create a custom target to run source code formatting validation command
add_format_validation_target(DiligentSamples "${CMAKE_CURRENT_SOURCE_DIR}" DiligentSamples)