find_package(SDL)

find_package(SDL_image)

find_package(SDL_net)

find_package(SDL_ttf)

find_package(SDL_mixer)

include (CheckLibraryExists)

#Mix_Init/Mix_Quit from SDL_mixer 1.2.10

check_library_exists(${SDLMIXER_LIBRARY} Mix_Init "" HAVE_MIXINIT)

#IMG_Init/IMG_Quit from SDL_image 1.2.8

check_library_exists(${SDLIMAGE_LIBRARY} IMG_Init "" HAVE_IMGINIT)

enable_language(Pascal)

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.inc.in ${CMAKE_CURRENT_BINARY_DIR}/config.inc)

#SOURCE AND PROGRAMS SECTION

if(${BUILD_ENGINE_LIBRARY})

    set(engine_output_name "${CMAKE_SHARED_LIBRARY_PREFIX}hwengine${CMAKE_SHARED_LIBRARY_SUFFIX}")

    set(hwengine_project hwLibrary.pas)

else()

    set(engine_output_name "hwengine${CMAKE_EXECUTABLE_SUFFIX}")

endif()

if (APPLE)

    set(required_fpc_version 2.6)

else()

    set(required_fpc_version 2.2)

endif()

set(engine_sources

    SDLh.pas

    uSinTable.pas

    uFloat.pas

    uConsts.pas

    LuaPas.pas

    PNGh.pas

    uTypes.pas

    uUtils.pas

    uVariables.pas

    uMisc.pas

    uConsole.pas

    uDebug.pas

    uCommands.pas

    uInputHandler.pas

    uTextures.pas

    uRenderUtils.pas

    uRender.pas

    uCaptions.pas

    uLandTexture.pas

    uIO.pas

    uChat.pas

    uPhysFSLayer.pas

    uStore.pas

    uSound.pas

    uRandom.pas

    uLocale.pas

    uStats.pas

    uCursor.pas

    uVideoRec.pas

    uAILandMarks.pas

    adler32.pas

    uLandTemplates.pas

    uLandGraphics.pas

    uLandPainted.pas

    uLandOutline.pas

    uLandGenMaze.pas

    uLandObjects.pas

    uLand.pas

    uAmmos.pas

    uGearsList.pas

    uCollisions.pas

    uAIMisc.pas

    uAIActions.pas

    uAIAmmoTests.pas

    uAI.pas

    uTeams.pas

    uGears.pas

    uGame.pas

    uCommandHandlers.pas

    uGearsHandlers.pas

    uGearsHandlersRope.pas

    uGearsHedgehog.pas

    uGearsRender.pas

    uGearsUtils.pas

    uScript.pas

    uWorld.pas

    uVisualGears.pas

    hwengine.pas

    GSHandlers.inc

    VGSHandlers.inc

    ArgParsers.inc

    options.inc

    ${CMAKE_CURRENT_BINARY_DIR}/config.inc

    )

include(${CMAKE_MODULE_PATH}/utils.cmake)

find_package_or_fail(FreePascal)

#when cmake-2.6 support is dropped, this ought to be inside FindFreePascal.cmake

if (FREEPASCAL_VERSION VERSION_LESS required_fpc_version)

    message(FATAL_ERROR "Freepascal ${FREEPASCAL_VERSION} is too old, minimum version required is ${required_fpc_version}")

elseif(FREEPASCAL_VERSION VERSION_GREATER 2.4)

    #enable INLINE only with a recent version of fpc

    add_flag_append(CMAKE_Pascal_FLAGS_RELEASE -Si)

endif()

#DEPENDECIES AND EXECUTABLES SECTION

if(APPLE)

    string(REGEX MATCH "[pP][pP][cC]+" powerpc_build "${CMAKE_OSX_ARCHITECTURES}")

    string(REGEX MATCH "[iI]386+" i386_build "${CMAKE_OSX_ARCHITECTURES}")

    string(REGEX MATCH "[xX]86_64+" x86_64_build "${CMAKE_OSX_ARCHITECTURES}")

    if(powerpc_build)

        set(powerpc_build "powerpc")

    endif()

    #on OSX we need to provide the SDL_main() function when building as executable

    if(NOT ${BUILD_ENGINE_LIBRARY})

        add_subdirectory(sdlmain)

        add_flag_append(CMAKE_Pascal_FLAGS -Fl${LIBRARY_OUTPUT_PATH})

    endif()

endif(APPLE)

    add_subdirectory(avwrapper)

    add_definitions(-dUSE_VIDEO_RECORDING)

    add_flag_append(CMAKE_Pascal_FLAGS -Fl${LIBRARY_OUTPUT_PATH})

endif()

find_package_or_disable_msg(PNG NOPNG "Screenshots will be saved in BMP")

if(PNG_FOUND)

    get_filename_component(PNG_LIB_DIR ${PNG_LIBRARY} PATH)

    add_definitions(-dPNG_SCREENSHOTS)

    add_flag_append(CMAKE_Pascal_FLAGS -Fl${PNG_LIB_DIR})

endif()

if(NOT LUA_FOUND)

    add_flag_append(CMAKE_Pascal_FLAGS -k${EXECUTABLE_OUTPUT_PATH}/lib${LUA_LIBRARY}.a)

    #linking with liblua.a requires system readline

    if(UNIX)

        add_flag_append(CMAKE_Pascal_FLAGS -k-lreadline)

    endif(UNIX)

endif()

if(NOT PHYSFS_FOUND)

    #-XLA is a beta fpc flag that renames libraries before passing them to the linker

    #we also have to pass PHYSFS_INTERNAL to satisfy windows runtime requirements

    #(should be harmless on other platforms)

    add_flag_append(CMAKE_Pascal_FLAGS "-XLAphysfs=${physfs_output_name}")

    add_definitions(-dPHYSFS_INTERNAL)

endif()

if(APPLE)

    add_flag_append(CMAKE_Pascal_FLAGS -Px86_64)

else()

    add_flag_append(CMAKE_Pascal_FLAGS -Pi386)

endif()

add_definitions(-dDEBUGFILE)

add_executable(hwengine ${engine_sources})

#when system Lua is not found we need to compile it before engine

if(NOT LUA_FOUND)

    target_link_libraries(hwengine lua)

endif()

# same for physfs

if(NOT PHYSFS_FOUND)

    target_link_libraries(hwengine physfs)

endif()

target_link_libraries(hwengine physlayer)

#when ffmpeg/libav is found we need to compile it before engine

#TODO: convert avwrapper to .pas unit so we can skip this step

if(${FFMPEG_FOUND})

    target_link_libraries(hwengine avwrapper)

endif()

if(APPLE)

    target_link_libraries(hwengine SDLmain)

endif()

install(PROGRAMS "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}" DESTINATION ${destination_dir})