find_package(SDL)

find_package(SDL_image)

find_package(SDL_net)

find_package(SDL_ttf)

find_package(SDL_mixer)

find_package(Lua)

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

#find which version of SDL_image and SDL_mixer we have (for IMG_Init and Mix_Init)

#if the headers are not installed, the newer apis won't be activated

find_file(sdlmixer_h SDL_mixer.h ${SDLMIXER_INCLUDE_DIR})

if(sdlmixer_h)

    file(STRINGS ${sdlmixer_h} sdlmixer_version_tmp REGEX "SDL_MIXER_PATCHLEVEL[\t' ']+[0-9]+")

    string(REGEX MATCH ".([0-9]+)" sdlmixer_version "${sdlmixer_version_tmp}")

    if(sdlmixer_version GREATER 9)

        message(STATUS "Enabling enhanced SDL_Mixer calls")

        set(pascal_compiler_flags_cmn "-dSDL_MIXER_NEWER" ${pascal_compiler_flags_cmn})

    endif()

endif()

find_file(sdlimage_h SDL_image.h ${SDLIMAGE_INCLUDE_DIR})

if(sdlimage_h)

    file(STRINGS ${sdlimage_h} sdlimage_version_tmp REGEX "SDL_IMAGE_PATCHLEVEL[\t' ']+[0-9]+")

    string(REGEX MATCH ".([0-9]+)" sdlimage_version "${sdlimage_version_tmp}")

    if(sdlimage_version GREATER 7)

        message(STATUS "Enabling enhanced SDL_Image calls")

        set(pascal_compiler_flags_cmn "-dSDL_IMAGE_NEWER" ${pascal_compiler_flags_cmn})

    endif()

endif()

#SOURCE AND PROGRAMS SECTION

set(fpc_tryexe fpc)

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

set(engine_sources

    ${hwengine_project}

    SDLh.pas

    uAI.pas

    uAIActions.pas

    uAIAmmoTests.pas

    uAIMisc.pas

    uAmmos.pas

    uChat.pas

    uCollisions.pas

    uConsole.pas

    uConsts.pas

    uFloat.pas

    uGame.pas

    uGears.pas

    uIO.pas

    uKeys.pas

    uLand.pas

    uLandGraphics.pas

    uLandObjects.pas

    uLandTemplates.pas

    uLandTexture.pas

    uLocale.pas

    uMisc.pas

    uMobile.pas

    uRandom.pas

    uScript.pas

    adler32.pas

    uSound.pas

    uStats.pas

    uStore.pas

    uTeams.pas

    uTypes.pas

    uVisualGears.pas

    uWorld.pas

    CCHandlers.inc

    GSHandlers.inc

    VGSHandlers.inc

    GearDrawing.inc

    HHHandlers.inc

    SinTable.inc

    ArgParsers.inc

    options.inc

    ${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(engine_sources ${hwengine_project} PascalExports.pas ${engine_sources})

    set(pascal_compiler_flags_cmn "-dHWLIBRARY" "-k-no_order_inits" "-fPIC" ${pascal_compiler_flags_cmn})

endif(BUILD_ENGINE_LIBRARY)

find_program(fpc_executable ${fpc_tryexe})

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()

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 detected: ${fpc_vers_major}.${fpc_vers_minor}")

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

    if(fpc_ver LESS "020200")

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

    elseif(APPLE AND x86_64_build AND fpc_ver LESS "020400")

        message(FATAL_ERROR "Minimum required version of FreePascal is 2.4.0 for building 64 bit applications!")

    endif()

else()

    message(FATAL_ERROR "No Pascal compiler found!")

endif()

set(pascal_compiler ${fpc_executable})

set(pascal_compiler_flags ${noexecstack_flags} ${pascal_compiler_flags_cmn} ${hwengine_project})

#DEPENDECIES AND EXECUTABLES SECTION

IF(NOT APPLE OR BUILD_ENGINE_LIBRARY)

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

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

        COMMAND "${pascal_compiler}"

        ARGS ${pascal_compiler_flags}

        MAIN_DEPENDENCY ${hwengine_project}

        DEPENDS ${engine_sources}

        )

ELSE()

    #let's build sdlmain, which is absent from the framework

    find_package(SDL REQUIRED)

    set(LIBRARY_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)

    include_directories(${SDL_INCLUDE_DIR})

    add_library (SDLmain STATIC SDLMain.m)

    #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 "${pascal_compiler}"

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

            MAIN_DEPENDENCY ${hwengine_project}

            DEPENDS ${engine_sources} SDLmain lua

            )

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

    endforeach()

    add_custom_command(OUTPUT "${EXECUTABLE_OUTPUT_PATH}/hwengine"

        COMMAND "lipo"

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

        DEPENDS ${lipo_args_list}

        )

ENDIF()

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

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