set (platform_INCLUDES "")
set (platform_LIBS "")

set(_HAS_WAYLAND Off)

if(UNIX)
    find_package(X11 QUIET)
    if(X11_FOUND)
        list(APPEND platform_INCLUDES
            ui_interfaces/x11/XcbInterface.cpp
            ui_interfaces/x11/XcbEventInterface.cpp
            ui_interfaces/x11/XcbWindow.cpp
            ui_interfaces/x11/XcbScreen.cpp
            ui_interfaces/x11/XcbImage.cpp
            ui_interfaces/x11/XcbLayerInterface.cpp
            ui_interfaces/x11/XcbTextInterface.cpp
            ui_interfaces/x11/XcbKeyboard.cpp
            ui_interfaces/x11/XcbGlInterface.cpp
            ui_interfaces/x11/XcbGlWindowInterface.cpp
            )
        list(APPEND platform_LIBS ${X11_LIBRARIES} ${X11_xcb_LIB} ${X11_X11_xcb_LIB} ${X11_xkbcommon_LIB} libxcb-image.so)
        list(APPEND X11_INCLUDE_DIRS ${X11_xkbcommon_INCLUDE_PATH})         
    else()
        message(STATUS "x11 development headers not found - skipping support")   
    endif()

    find_path(WAYLAND_CLIENT_INCLUDE_DIR NAMES wayland-client.h)
    #if (NOT ${WAYLAND_CLIENT_INCLUDE_DIR-NOTFOUND})
        list(APPEND WAYLAND_INCLUDE_DIRS ${WAYLAND_CLIENT_INCLUDE_DIR})

        find_path(WAYLAND_EXTENSIONS_INCLUDE_DIR NAMES xdg-shell-client-protocol.h HINTS ENV WAYLAND_EXTENSION_DIR)
        
        #if(NOT ${WAYLAND_EXTENSIONS_INCLUDE_DIR-NOTFOUND})
            find_library(WAYLAND_CLIENT_LIBRARY NAMES wayland-client libwayland-client)

            list(APPEND WAYLAND_INCLUDE_DIRS ${WAYLAND_EXTENSIONS_INCLUDE_DIR})
            list(APPEND platform_INCLUDES
                ui_interfaces/wayland/WaylandInterface.cpp
                ui_interfaces/wayland/WaylandSurface.cpp
                ui_interfaces/wayland/WaylandBuffer.cpp
                ui_interfaces/wayland/WaylandPointerInterface.cpp
                ui_interfaces/wayland/WaylandSeatInterface.cpp
                ui_interfaces/wayland/WaylandKeyboard.cpp
                ui_interfaces/wayland/WaylandEglInterface.cpp
                ui_interfaces/wayland/WaylandEglWindowInterface.cpp
                ${WAYLAND_EXTENSIONS_INCLUDE_DIR}/xdg-shell-protocol.cpp
                )
            set(OpenGL_GL_PREFERENCE "GLVND")
            find_package(OpenGL QUIET)
            if (OpenGL_FOUND)
                list(APPEND platform_LIBS OpenGL::EGL)
            endif()
                
            set(_HAS_WAYLAND ON)
		#else()
			#message(STATUS "Wayland Extensions Header not found - not building Wayland support")	
		#endif()
	#else()
		#message(STATUS "Wayland Client Header not found - not building Wayland support")	
	#endif()
    
else()
	list(APPEND platform_INCLUDES
	    ui_interfaces/win32/Win32UIInterface.h
	    ui_interfaces/win32/Win32UIInterface.cpp
	    ui_interfaces/win32/Win32WindowInterface.h
	    ui_interfaces/win32/Win32WindowInterface.cpp
	    ui_interfaces/win32/Win32Window.h
	    ui_interfaces/win32/Win32Window.cpp
		)
endif()

set(HAS_WAYLAND ${_HAS_WAYLAND} CACHE BOOL "Can build with Wayland")

list(APPEND windows_LIB_INCLUDES
        ui_interfaces/UiInterfaceFactory.cpp
        managers/WindowManager.cpp
        managers/DesktopManager.cpp
        managers/EventManager.cpp)

# add the library
add_library(windows SHARED ${windows_LIB_INCLUDES} ${platform_INCLUDES}) 

target_include_directories(windows PUBLIC
                          "${CMAKE_CURRENT_SOURCE_DIR}"
                          "${CMAKE_CURRENT_SOURCE_DIR}/managers"
                          "${CMAKE_CURRENT_SOURCE_DIR}/ui_interfaces"
                          "${CMAKE_CURRENT_SOURCE_DIR}/ui_interfaces/x11"
                          "${CMAKE_CURRENT_SOURCE_DIR}/ui_interfaces/wayland"
                          "${CMAKE_CURRENT_SOURCE_DIR}/ui_interfaces/win32"
                          ${WAYLAND_INCLUDE_DIRS}
                          ${X11_INCLUDE_DIRS}
                          )

target_link_libraries(windows PUBLIC ${platform_LIBS} core geometry graphics ui_elements ${WAYLAND_CLIENT_LIBRARY} wayland-egl)
target_compile_options(windows PRIVATE -Wno-attributes) # From xdg shell autogen code

set_property(TARGET windows PROPERTY FOLDER src)
set_target_properties( windows PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS ON )