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

	uRandom.pas

	uScript.pas

	adler32.pas

	uSound.pas

	uStats.pas

	uStore.pas

	uTeams.pas

	uVisualGears.pas

	uWorld.pas

	CCHandlers.inc

	GSHandlers.inc

	VGSHandlers.inc

	GearDrawing.inc

	HHHandlers.inc

	SinTable.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 "-h" 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})