cmake_minimum_required (VERSION 3.6.1)
project (Banshee)

# Version
set (BS_VERSION_MAJOR 0)
set (BS_VERSION_MINOR 3)

# Configuration types
if(CMAKE_CONFIGURATION_TYPES) # Multiconfig generator?
	set(CMAKE_CONFIGURATION_TYPES "Debug;OptimizedDebug;Release;" CACHE INTERNAL "") 
else()
	if(NOT CMAKE_BUILD_TYPE)
		message("Defaulting to release build.")
		set(CMAKE_BUILD_TYPE Release CACHE INTERNAL "")
	endif()
	set_property(CACHE CMAKE_BUILD_TYPE PROPERTY HELPSTRING "Choose the type of build")
	# Set the valid options for cmake-gui drop-down list
	set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS Debug OptimizedDebug Release)
endif()

if(${CMAKE_SIZEOF_VOID_P} EQUAL 8)
	set(BS_64BIT true)
endif()

# Options
set(AUDIO_MODULE "OpenAudio" CACHE STRING "Audio backend to use.")
set_property(CACHE AUDIO_MODULE PROPERTY STRINGS OpenAudio FMOD)

set(PHYSICS_MODULE "PhysX" CACHE STRING "Physics backend to use.")
set_property(CACHE PHYSICS_MODULE PROPERTY STRINGS PhysX)

set(INPUT_MODULE "OIS" CACHE STRING "Input backend to use.")
set_property(CACHE INPUT_MODULE PROPERTY STRINGS OIS)

if(WIN32)
set(RENDER_API_MODULE "DirectX 11" CACHE STRING "Render API to use.")
set_property(CACHE RENDER_API_MODULE PROPERTY STRINGS "DirectX 11" "DirectX 9" "OpenGL")
else()
set(RENDER_API_MODULE "OpenGL" CACHE STRING "Render API to use.")
set_property(CACHE RENDER_API_MODULE PROPERTY STRINGS "OpenGL")
endif()

set(RENDERER_MODULE "RenderBeast" CACHE STRING "Renderer backend to use.")
set_property(CACHE RENDERER_MODULE PROPERTY STRINGS RenderBeast)

set(BUILD_EDITOR ON CACHE BOOL "If true both the engine and the editor will be built.")

mark_as_advanced(CMAKE_INSTALL_PREFIX)

# External code
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/CMake/Modules/")

# Global compile & linker flags
## Compiler-agnostic settings
### Target at least C++11
set(CMAKE_CXX_STANDARD 11)
## Compiler-specific settings
if(MSVC)
	# Linker
	set(BS_LINKER_FLAGS_COMMON "/DYNAMICBASE /NOLOGO")

	set(BS_LINKER_FLAGS_DEBUG "${BS_LINKER_FLAGS_COMMON} /DEBUG")
	set(BS_LINKER_FLAGS_OPTIMIZEDDEBUG "${BS_LINKER_FLAGS_COMMON} /LTCG:incremental /INCREMENTAL:NO /OPT:REF /DEBUG")
	set(BS_LINKER_FLAGS_RELEASE "${BS_LINKER_FLAGS_COMMON} /LTCG /INCREMENTAL:NO /OPT:REF")
	
	if(BS_64BIT)
		set(BS_LINKER_FLAGS_OPTIMIZEDDEBUG "${BS_LINKER_FLAGS_OPTIMIZEDDEBUG} /OPT:ICF")
		set(BS_LINKER_FLAGS_RELEASE "${BS_LINKER_FLAGS_RELEASE} /OPT:ICF")
	endif()
	
	set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "/DLL ${BS_LINKER_FLAGS_DEBUG}")
	set(CMAKE_MODULE_LINKER_FLAGS_DEBUG "/DLL ${BS_LINKER_FLAGS_DEBUG}")
	set(CMAKE_EXE_LINKER_FLAGS_DEBUG ${BS_LINKER_FLAGS_DEBUG})
	
	set(CMAKE_SHARED_LINKER_FLAGS_OPTIMIZEDDEBUG "/DLL ${BS_LINKER_FLAGS_OPTIMIZEDDEBUG}")
	set(CMAKE_MODULE_LINKER_FLAGS_OPTIMIZEDDEBUG "/DLL ${BS_LINKER_FLAGS_OPTIMIZEDDEBUG}")
	set(CMAKE_EXE_LINKER_FLAGS_OPTIMIZEDDEBUG ${BS_LINKER_FLAGS_OPTIMIZEDDEBUG})
	
	set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "/DLL ${BS_LINKER_FLAGS_RELEASE}")
	set(CMAKE_MODULE_LINKER_FLAGS_RELEASE "/DLL ${BS_LINKER_FLAGS_RELEASE}")
	set(CMAKE_EXE_LINKER_FLAGS_RELEASE ${BS_LINKER_FLAGS_RELEASE})
	
	# Compiler
	set(BS_COMPILER_FLAGS_COMMON "/GS- /W3 /GR- /WX- /nologo /bigobj /wd\"4577\"")
	set(CMAKE_CXX_FLAGS "/DWIN32 /D_WINDOWS")
	
	set(CMAKE_CXX_FLAGS_DEBUG "${BS_COMPILER_FLAGS_COMMON} /Gm /Od /RTC1 /MDd")
	
	if(BS_64BIT) # Debug edit and continue for 64-bit
		set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /ZI")
	else() # Normal debug for 32-bit
		set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Zi")
	endif()
	
	set(CMAKE_CXX_FLAGS_OPTIMIZEDDEBUG "${BS_COMPILER_FLAGS_COMMON} /GL /Gy /Zi /Gm /O2 /Oi /MD")
	set(CMAKE_CXX_FLAGS_RELEASE "${BS_COMPILER_FLAGS_COMMON} /GL /Gy /O2 /Oi /MD /MP")
	
	# Global defines
	add_definitions(-D_HAS_EXCEPTIONS=0)
	
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
	# Note: Optionally add -ffunction-sections, -fdata-sections, but with linker option --gc-sections
	set(BS_COMPILER_FLAGS_COMMON "-fpic -fno-exceptions -fno-strict-aliasing -fno-rtti -fno-ms-compatibility -fms-extensions")
	
	set(CMAKE_CXX_FLAGS_DEBUG "${BS_COMPILER_FLAGS_COMMON} -g -O0")
	set(CMAKE_CXX_FLAGS_OPTIMIZEDDEBUG "${BS_COMPILER_FLAGS_COMMON} -gline-tables-only -O2")
	set(CMAKE_CXX_FLAGS_RELEASE "${BS_COMPILER_FLAGS_COMMON} -g0 -O2")
elseif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
	set(BS_COMPILER_FLAGS_COMMON "-fpic -fno-exceptions -fno-strict-aliasing -fno-rtti")
	
	set(CMAKE_CXX_FLAGS_DEBUG "${BS_COMPILER_FLAGS_COMMON} -g -O0")
	set(CMAKE_CXX_FLAGS_OPTIMIZEDDEBUG "${BS_COMPILER_FLAGS_COMMON} -gline-tables-only -O2")
	set(CMAKE_CXX_FLAGS_RELEASE "${BS_COMPILER_FLAGS_COMMON} -g0 -O2")

else()
# TODO_OTHER_COMPILERS_GO_HERE
endif()

# Output
set(CMAKE_BINARY_DIR "${PROJECT_SOURCE_DIR}/../Build/${CMAKE_GENERATOR}/")

if(BS_64BIT)
	set(BS_OUTPUT_DIR_PREFIX x64)
else()
	set(BS_OUTPUT_DIR_PREFIX x86)
endif()

set(BS_BINARY_OUTPUT_DIR ${PROJECT_SOURCE_DIR}/../bin/${BS_OUTPUT_DIR_PREFIX})
set(BS_LIBRARY_OUTPUT_DIR ${PROJECT_SOURCE_DIR}/../lib/${BS_OUTPUT_DIR_PREFIX})

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG ${BS_BINARY_OUTPUT_DIR}/Debug)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_OPTIMIZEDDEBUG ${BS_BINARY_OUTPUT_DIR}/OptimizedDebug)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_RELEASE ${BS_BINARY_OUTPUT_DIR}/Release)

set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_DEBUG ${BS_BINARY_OUTPUT_DIR}/Debug)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_OPTIMIZEDDEBUG ${BS_BINARY_OUTPUT_DIR}/OptimizedDebug)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY_RELEASE ${BS_BINARY_OUTPUT_DIR}/Release)

set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY_DEBUG ${BS_LIBRARY_OUTPUT_DIR}/Debug)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY_OPTIMIZEDDEBUG ${BS_LIBRARY_OUTPUT_DIR}/OptimizedDebug)
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY_RELEASE ${BS_LIBRARY_OUTPUT_DIR}/Release)

if(WIN32)
	set(BS_LIBRARY_EXTENSION ".lib")
else()
	set(BS_LIBRARY_EXTENSION ".a")
endif()

function(add_library_per_config target_name lib_name release_name debug_name)
	add_library(${lib_name} STATIC IMPORTED)
	set_target_properties(${lib_name} PROPERTIES IMPORTED_LOCATION_DEBUG ${PROJECT_SOURCE_DIR}/../Dependencies/${lib_name}/lib/${BS_OUTPUT_DIR_PREFIX}/${debug_name}${BS_LIBRARY_EXTENSION})
	set_target_properties(${lib_name} PROPERTIES IMPORTED_LOCATION_OPTIMIZEDDEBUG ${PROJECT_SOURCE_DIR}/../Dependencies/${lib_name}/lib/${BS_OUTPUT_DIR_PREFIX}/${release_name}${BS_LIBRARY_EXTENSION})
	set_target_properties(${lib_name} PROPERTIES IMPORTED_LOCATION_RELEASE ${PROJECT_SOURCE_DIR}/../Dependencies/${lib_name}/lib/${BS_OUTPUT_DIR_PREFIX}/${release_name}${BS_LIBRARY_EXTENSION})	
	
	target_link_libraries(${target_name} PRIVATE ${lib_name})	
endfunction()

function(add_library_per_config_multi target_name lib_name file_name release_name debug_name)
	add_library(${lib_name} STATIC IMPORTED)
	set_target_properties(${lib_name} PROPERTIES IMPORTED_LOCATION_DEBUG ${PROJECT_SOURCE_DIR}/../Dependencies/${file_name}/lib/${BS_OUTPUT_DIR_PREFIX}/${debug_name}${BS_LIBRARY_EXTENSION})
	set_target_properties(${lib_name} PROPERTIES IMPORTED_LOCATION_OPTIMIZEDDEBUG ${PROJECT_SOURCE_DIR}/../Dependencies/${file_name}/lib/${BS_OUTPUT_DIR_PREFIX}/${release_name}${BS_LIBRARY_EXTENSION})
	set_target_properties(${lib_name} PROPERTIES IMPORTED_LOCATION_RELEASE ${PROJECT_SOURCE_DIR}/../Dependencies/${file_name}/lib/${BS_OUTPUT_DIR_PREFIX}/${release_name}${BS_LIBRARY_EXTENSION})	
	
	target_link_libraries(${target_name} PRIVATE ${lib_name})	
endfunction()

function(add_engine_dependencies target_name)
	if(RENDER_API_MODULE MATCHES "DirectX 11")
		add_dependencies(${target_name} BansheeD3D11RenderAPI)
	elseif(RENDER_API_MODULE MATCHES "DirectX 9")
		add_dependencies(${target_name} BansheeD3D9RenderAPI)
	else()
		add_dependencies(${target_name} BansheeGLRenderAPI)
	endif()

	if(AUDIO_MODULE MATCHES "FMOD")
		add_dependencies(${target_name} BansheeFMOD)
	else() # Default to OpenAudio
		add_dependencies(${target_name} BansheeOpenAudio)
	endif()
	
	add_dependencies(${target_name} BansheeMono BansheeSL BansheeOISInput BansheePhysX RenderBeast SBansheeEngine)
endfunction()

set_property(GLOBAL PROPERTY USE_FOLDERS TRUE)

# Sub-directories
## Layers
add_subdirectory(BansheeUtility)
add_subdirectory(BansheeCore)
add_subdirectory(BansheeEngine)

if(BUILD_EDITOR OR MSVC)
	add_subdirectory(BansheeEditor)
endif()

## Plugins
### If using MSVC include all plugins in the solution (which ones actually build is controlled by dependencies)
if(MSVC)
	add_subdirectory(BansheeD3D11RenderAPI)
	add_subdirectory(BansheeD3D9RenderAPI)
	add_subdirectory(BansheeGLRenderAPI)
	add_subdirectory(BansheeFMOD)
	add_subdirectory(BansheeOpenAudio)
else() # Otherwise include only chosen ones
	if(RENDER_API_MODULE MATCHES "DirectX 11")
		add_subdirectory(BansheeD3D11RenderAPI)
	elseif(RENDER_API_MODULE MATCHES "DirectX 9")
		add_subdirectory(BansheeD3D9RenderAPI)
	else()
		add_subdirectory(BansheeGLRenderAPI)
	endif()

	if(AUDIO_MODULE MATCHES "FMOD")
		add_subdirectory(BansheeFMOD)
	else() # Default to OpenAudio
		add_subdirectory(BansheeOpenAudio)
	endif()
endif()

add_subdirectory(RenderBeast)
add_subdirectory(BansheeOISInput)
add_subdirectory(BansheePhysX)
add_subdirectory(BansheeFBXImporter)
add_subdirectory(BansheeFontImporter)
add_subdirectory(BansheeFreeImgImporter)
add_subdirectory(BansheeMono)
add_subdirectory(BansheeSL)

## Script interop
add_subdirectory(SBansheeEngine)

if(BUILD_EDITOR OR MSVC)
	add_subdirectory(SBansheeEditor)
endif()

## Executables
add_subdirectory(Game)
add_subdirectory(ExampleProject)

if(BUILD_EDITOR OR MSVC)
	add_subdirectory(BansheeEditorExec)
endif()

## Managed projects
if(MSVC)
	include_external_msproject(MBansheeEngine ${PROJECT_SOURCE_DIR}/MBansheeEngine/MBansheeEngine.csproj)
	add_dependencies(Game MBansheeEngine)
	
	set_property(TARGET MBansheeEngine PROPERTY FOLDER Script)

	if(BUILD_EDITOR)
		include_external_msproject(MBansheeEditor ${PROJECT_SOURCE_DIR}/MBansheeEditor/MBansheeEditor.csproj)
		add_dependencies(BansheeEditorExec MBansheeEngine MBansheeEditor)
		set_property(TARGET MBansheeEditor PROPERTY FOLDER Script)
		set_property(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} PROPERTY VS_STARTUP_PROJECT BansheeEditorExec)
	endif()
else()
# TODO - Use Mono compiler to build the managed code as a pre-build step
endif()

# Config file
## Set names of libraries used in the config file
if(RENDER_API_MODULE MATCHES "DirectX 11")
	set(RENDER_API_MODULE_LIB BansheeD3D11RenderAPI)
elseif(RENDER_API_MODULE MATCHES "DirectX 9")
	set(RENDER_API_MODULE_LIB BansheeD3D9RenderAPI)
else()
	set(RENDER_API_MODULE_LIB BansheeGLRenderAPI)
endif()

if(AUDIO_MODULE MATCHES "FMOD")
	set(AUDIO_MODULE_LIB BansheeFMOD)
else() # Default to OpenAudio
	set(AUDIO_MODULE_LIB BansheeOpenAudio)
endif()

set(RENDERER_MODULE_LIB RenderBeast)
set(INPUT_MODULE_LIB BansheeOISInput)
set(PHYSICS_MODULE_LIB BansheePhysX)

## Generate config file
configure_file("${PROJECT_SOURCE_DIR}/CMake/BsEngineConfig.h.in" "${PROJECT_SOURCE_DIR}/BansheeEngine/Include/BsEngineConfig.h")