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)

if(HAVE_MIXINIT)

    add_definitions(-dSDL_MIXER_NEWER)

endif()

#IMG_Init/IMG_Quit from SDL_image 1.2.8

check_library_exists(${SDLIMAGE_LIBRARY} IMG_Init "" HAVE_IMGINIT)

if(HAVE_IMGINIT)

    add_definitions(-dSDL_IMAGE_NEWER)

endif()

enable_language(Pascal)

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

#SOURCE AND PROGRAMS SECTION

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

    )

if(${BUILD_ENGINE_LIBRARY})

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

    add_definitions(-dHWLIBRARY)

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

    if(APPLE AND current_macosx_version VERSION_GREATER "10.5")

        add_flag_append(CMAKE_Pascal_FLAGS "-k-no_order_inits")

    endif()

    set(destination_dir ${target_library_install_dir})

else(${BUILD_ENGINE_LIBRARY})

    set(destination_dir ${target_binary_install_dir})

endif(${BUILD_ENGINE_LIBRARY})

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}")

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})

        #let's look for the installed sdlmain file; if it is not found, let's build our own

        find_package(SDL REQUIRED)

        include_directories(${SDL_INCLUDE_DIR})

        add_library (SDLmain STATIC SDLMain.m)

        add_flag_append(CMAKE_Pascal_FLAGS -Fl${LIBRARY_OUTPUT_PATH})

    endif()

endif(APPLE)

if(${FFMPEG_FOUND})

    # TODO: this check is only for SDL < 2

    # fpc will take care of linking but we need to have this library installed

    find_package(GLUT REQUIRED)

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

    include_directories(${FFMPEG_INCLUDE_DIR})

    if(WIN32)

        # there are some problems with linking our avwrapper as static lib, so link it as shared

        add_library(avwrapper SHARED avwrapper.c)

        target_link_libraries(avwrapper ${FFMPEG_LIBRARIES})

        install(PROGRAMS "${LIBRARY_OUTPUT_PATH}/${CMAKE_SHARED_LIBRARY_PREFIX}avwrapper${CMAKE_SHARED_LIBRARY_SUFFIX}" DESTINATION ${target_library_install_dir})

    else()

        add_library(avwrapper STATIC avwrapper.c)

    endif()

    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)

    #linking with liblua.a requires system readline

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()

#this command is a workaround to some inlining issues present in older FreePascal versions and fixed in 2.6

#if((FREEPASCAL_VERSION VERSION_LESS "2.6") AND (NOT ${FFMPEG_FOUND}))

#    add_dependencies(hwengine ENGINECLEAN)

#endif()