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)

include_directories(${CMAKE_CURRENT_BINARY_DIR})

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

    uAIMisc.pas

    uAIActions.pas

    uAI.pas

    uWorld.pas

    uVisualGears.pas

    uTeams.pas

    uGearsList.pas

    uCollisions.pas

    uAIAmmoTests.pas

    uGears.pas

    uGame.pas

    uCommandHandlers.pas

    uGearsHandlers.pas

    uGearsHandlersRope.pas

    uGearsHedgehog.pas

    uGearsRender.pas

    uGearsUtils.pas

    uScript.pas

    hwengine.pas

    GSHandlers.inc

    VGSHandlers.inc

    ArgParsers.inc

    options.inc

    ${CMAKE_CURRENT_BINARY_DIR}/config.inc

    )

include(${CMAKE_MODULE_PATH}/utils.cmake)

if (${CMAKE_Pascal_COMPILER_VERSION} VERSION_LESS 2.2 OR # older versions are just ancient

    (${CMAKE_Pascal_COMPILER_VERSION} VERSION_LESS 2.6 AND APPLE)) # because of 64bit and opengl bindings

    message(FATAL_ERROR "Your FreePascal installation is too old (fpc ${CMAKE_Pascal_COMPILER_VERSION})!")

elseif(CMAKE_Pascal_COMPILER_VERSION VERSION_GREATER 2.4)

    #enable INLINE only with a recent version of fpc

    add_flag_prepend(CMAKE_Pascal_FLAGS_RELEASE -Si)

endif()

#DEPENDECIES AND EXECUTABLES SECTION

if(APPLE)

    if(CMAKE_OSX_ARCHITECTURES)

        #parse this system variable and adjust only the powerpc syntax to be compatible with -P

        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(x86_64_build)

            add_flag_prepend(CMAKE_Pascal_FLAGS -Px86_64)

        elseif(i386_build)

            add_flag_prepend(CMAKE_Pascal_FLAGS -Pi386)

        elseif(powerpc_build)

            add_flag_prepend(CMAKE_Pascal_FLAGS -Ppowerpc)

        else()

            message(FATAL_ERROR "Unknown architecture present in CMAKE_OSX_ARCHITECTURES (${CMAKE_OSX_ARCHITECTURES})")

        endif()

        list(LENGTH CMAKE_OSX_ARCHITECTURES num_of_archs)

        if(num_of_archs GREATER 1)

            message(${WARNING} "Only one architecture in CMAKE_OSX_ARCHITECTURES is currently supported, picking the first one")

        endif()

    elseif(CMAKE_SIZEOF_VOID_P MATCHES "8")

        #if that variable is not set check if we are on x86_64 and if so force it, else use default

        add_flag_prepend(CMAKE_Pascal_FLAGS -Px86_64)

    endif()

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

    if(NOT BUILD_ENGINE_LIBRARY)

        add_subdirectory(sdlmain)

        list(APPEND HW_LINK_LIBS SDLmain)

        add_flag_append(CMAKE_Pascal_FLAGS -Fl${LIBRARY_OUTPUT_PATH})

    endif()

    #when sysroot is set, make sure that fpc picks it

    if(CMAKE_OSX_SYSROOT)

        set(add_flag_append "-XD${CMAKE_OSX_SYSROOT}")

    endif(CMAKE_OSX_SYSROOT)

endif(APPLE)

if(FFMPEG_FOUND)

    add_subdirectory(avwrapper)

    list(APPEND HW_LINK_LIBS 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)

    list(APPEND HW_LINK_LIBS lua)

    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)

    add_definitions(-dPHYSFS_INTERNAL)

    list(APPEND HW_LINK_LIBS physfs)

    #-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}")

endif()

list(APPEND HW_LINK_LIBS physlayer)

if(HAVE_MIXINIT)

    add_definitions(-dSDL_MIXER_NEWER)

endif(HAVE_MIXINIT)

if(HAVE_IMGINIT)

    add_definitions(-dSDL_IMAGE_NEWER)

endif(HAVE_IMGINIT)

add_definitions(-dDEBUGFILE)

#SOURCE AND PROGRAMS SECTION

if(BUILD_ENGINE_LIBRARY)

    message(${WARNING} "Engine will be built as library (experimental)")

    if(APPLE AND current_macosx_version VERSION_GREATER "10.5")

        # due to compiler/linker issues on Max OS X 10.6 -k-no_order_inits is needed to avoid linking fail

        add_flag_prepend(CMAKE_Pascal_FLAGS "-k-no_order_inits")

    endif()

    #workaround for missing <TARGET> support during object generation

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

    set(destination_dir ${target_library_install_dir})

    add_flag_prepend(CMAKE_Pascal_FLAGS "-o${LIBRARY_OUTPUT_PATH}/${engine_output_name}")

    add_definitions(-dHWLIBRARY)

    add_library(hwengine SHARED ${engine_sources} hwLibrary.pas)

else()

    # no need to change name here because target has same name

    set(engine_output_name "hwengine${CMAKE_EXECUTABLE_SUFFIX}")

    set(destination_dir ${target_binary_install_dir})

    add_executable(hwengine ${engine_sources})

endif()

#even though not actually used, this will trigger relink if any lib changes

target_link_libraries(hwengine ${HW_LINK_LIBS})

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