find_package(SDL)

find_package(SDL_image)

find_package(SDL_net)

find_package(SDL_ttf)

find_package(SDL_mixer)

include(${CMAKE_MODULE_PATH}/FindSDL_Extras.cmake)

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

#SOURCE AND PROGRAMS SECTION

set(hwengine_project ${hedgewars_SOURCE_DIR}/hedgewars/hwengine.pas)

set(engine_output_name "hwengine")

set(engine_sources

    ${hwengine_project}

    SDLh.pas

    PNGh.pas

    uAI.pas

    uAIActions.pas

    uAIAmmoTests.pas

    uAIMisc.pas

    uAmmos.pas

    uCaptions.pas

    uChat.pas

    uCollisions.pas

    uCommands.pas

    uCommandHandlers.pas

    uConsole.pas

    uConsts.pas

    uDebug.pas

    uFloat.pas

    uGame.pas

    uGears.pas

    uGearsRender.pas

    uIO.pas

    uInputHandler.pas

    uLand.pas

    uLandGenMaze.pas

    uLandGraphics.pas

    uLandObjects.pas

    uLandOutline.pas

    uLandPainted.pas

    uLandTemplates.pas

    uLandTexture.pas

    uLocale.pas

    uMisc.pas

    uMobile.pas

    uRandom.pas

    uRender.pas

    uRenderUtils.pas

    uScript.pas

    uSinTable.pas

    uSound.pas

    uStats.pas

    uStore.pas

    uTeams.pas

    uTextures.pas

    uTypes.pas

    uUtils.pas

    uVariables.pas

    uVisualGears.pas

    uWorld.pas

    GSHandlers.inc

    VGSHandlers.inc

    ArgParsers.inc

    options.inc

    adler32.pas

    ${CMAKE_CURRENT_BINARY_DIR}/config.inc

    )

if(BUILD_ENGINE_LIBRARY)

    message(STATUS "Engine will be built as library (experimental)")

    set(hwengine_project ${hedgewars_SOURCE_DIR}/hedgewars/hwLibrary.pas)

    set(pascal_flags "-dHWLIBRARY" ${pascal_flags})

    # create position independent code, only required for x68_64 builds, similar to -fPIC

    if(CMAKE_SIZEOF_VOID_P MATCHES "8")

        set(pascal_flags "-Cg" ${pascal_flags})

    endif(CMAKE_SIZEOF_VOID_P MATCHES "8")

    # 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 GREATER "10.5")

        set(pascal_flags "-k-no_order_inits" ${pascal_flags})

    endif()

    if (APPLE)

        set(engine_output_name "hwengine.dylib")

    endif (APPLE)

endif(BUILD_ENGINE_LIBRARY)

IF(FPC)

    set(fpc_executable ${FPC})

ELSE()

    find_program(fpc_executable fpc)

ENDIF()

if(fpc_executable)

    exec_program(${fpc_executable} ARGS "-iV" OUTPUT_VARIABLE fpc_output)

endif(fpc_executable)

set(noexecstack_flags "-k-z" "-knoexecstack")

file(WRITE ${EXECUTABLE_OUTPUT_PATH}/checkstack.pas "begin end.")

exec_program(${fpc_executable} ${EXECUTABLE_OUTPUT_PATH}

    ARGS ${noexecstack_flags} checkstack.pas

    OUTPUT_VARIABLE noout

    RETURN_VALUE testnoexecstack

    )

if(${testnoexecstack})

    set (noexecstack_flags "")

endif(${testnoexecstack})

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 main() function when building as executable

    if(NOT BUILD_ENGINE_LIBRARY)

        #let's look for the bundled sdlmain, if not found build our own

        find_package(SDL REQUIRED)

        #remove the ";-framework Cocoa" from the SDL_LIBRARY variable

        string(REGEX REPLACE "(.*);-.*" "\\1" sdl_dir "${SDL_LIBRARY}")

        #find libsdmain.a

        find_file(SDLMAIN_LIB libSDLMain.a PATHS ${sdl_dir}/Resources/)

        if(SDLMAIN_LIB MATCHES "SDLMAIN_LIB-NOTFOUND")

            set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)

            include_directories(${SDL_INCLUDE_DIR})

            add_library (SDLmain STATIC SDLMain.m)

            #add a dependency to the hwengine target

            set(engine_sources ${engine_sources} SDLmain)

            set(SDLMAIN_LIB "${CMAKE_BINARY_DIR}/bin/libSDLmain.a")

        endif()

        set(pascal_flags "-k${SDLMAIN_LIB}" ${pascal_flags})

    endif()

endif(APPLE)

#PASCAL DETECTION SECTION

string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" fpc_version "${fpc_output}")

if(fpc_version)

    string(REGEX REPLACE "([0-9]+)\\.[0-9]+\\.[0-9]+" "\\1" fpc_vers_major "${fpc_version}")

    string(REGEX REPLACE "[0-9]+\\.([0-9]+)\\.[0-9]+" "\\1" fpc_vers_minor "${fpc_version}")

    string(REGEX REPLACE "[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" fpc_vers_patch "${fpc_version}")

    message(STATUS "Freepascal version installed: ${fpc_vers_major}.${fpc_vers_minor}")

    math(EXPR fpc_version "${fpc_vers_major}*10000 + ${fpc_vers_minor}*100 + ${fpc_vers_patch}")

    if(fpc_version LESS "020200")

        message(FATAL_ERROR "Minimum required version of FreePascal is 2.2.0")

    elseif(APPLE AND (fpc_version LESS "020600"))

        message(FATAL_ERROR "Minimum required version of FreePascal is 2.6.0 on Mac OS X")

    endif()

else()

    message(FATAL_ERROR "No FreePascal compiler found!")

endif()

#DEPENDECIES AND EXECUTABLES SECTION

if(NOT NOPNG)

    find_package(PNG)

    if(${PNG_FOUND})

        message(STATUS "PNG screenshots enabled (library found at ${PNG_LIBRARY})")

        set(pascal_flags "-dPNG_SCREENSHOTS" ${pascal_flags})

        if(APPLE)  # need to explictly link with the static lib -- maybe windows too?

            string(REGEX REPLACE "(.*)libpng.*" "\\1" PNG_LIBDIR "${PNG_LIBRARY}")

            set(pascal_flags "-k${PNG_LIBDIR}/libpng.a" ${pascal_flags})

        endif()

    else()

        message(STATUS "PNG library not found, switching to screenshots in BMP format")

    endif()

else()

    message(STATUS "PNG screenshots disabled per user request, using BMP format")

endif()

set(fpc_flags ${noexecstack_flags} ${pascal_flags} ${hwengine_project})

IF(NOT APPLE)

    #here is the command for standard executables or for shared library

    add_custom_command(OUTPUT "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}${CMAKE_EXECUTABLE_SUFFIX}"

        COMMAND "${fpc_executable}"

        ARGS ${fpc_flags}

        MAIN_DEPENDENCY ${hwengine_project}

        DEPENDS ${engine_sources}

        )

ELSE()

    #these are the dependencies for building a universal binary on Mac OS X

    foreach (build_arch ${powerpc_build} ${i386_build} ${x86_64_build})

        set(lipo_args_list "${EXECUTABLE_OUTPUT_PATH}/hwengine.${build_arch}" ${lipo_args_list})

        add_custom_command(OUTPUT "${EXECUTABLE_OUTPUT_PATH}/hwengine.${build_arch}"

            COMMAND "${fpc_executable}"

            ARGS ${fpc_flags} -ohwengine.${build_arch} -P${build_arch}

            MAIN_DEPENDENCY ${hwengine_project}

            DEPENDS ${engine_sources}

            )

        add_custom_target(hwengine.${build_arch} ALL DEPENDS "${EXECUTABLE_OUTPUT_PATH}/hwengine.${build_arch}")

    endforeach()

    add_custom_command(OUTPUT "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}"

        COMMAND "lipo"

        ARGS ${lipo_args_list} -create -output ${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}

        DEPENDS ${lipo_args_list}

        )

ENDIF()

add_custom_target(${engine_output_name} ALL DEPENDS "${EXECUTABLE_OUTPUT_PATH}/${engine_output_name}${CMAKE_EXECUTABLE_SUFFIX}")

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

if(NOT LUA_FOUND)

    add_dependencies(${engine_output_name} lua)

endif()

#this command is a workaround to some inlining issues present in older

# FreePascal versions and fixed in 2.6, That version is mandatory on OSX,

# hence the command is not needed there

if(NOT APPLE)

    add_custom_target(ENGINECLEAN COMMAND ${CMAKE_BUILD_TOOL} "clean" "${PROJECT_BINARY_DIR}" "${hedgewars_SOURCE_DIR}/hedgewars")

    add_dependencies(${engine_output_name} ENGINECLEAN)

endif()

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