cmake_minimum_required(VERSION 3.25)

# Allow passing search paths from environment.
foreach(_path_elem $ENV{CMAKE_FIND_ROOT_PATH})
    if(NOT IS_ABSOLUTE ${_path_elem})
        list(APPEND CMAKE_FIND_ROOT_PATH "${CMAKE_CURRENT_SOURCE_DIR}/${_path_elem}")
    else()     
        list(APPEND CMAKE_FIND_ROOT_PATH "${_path_elem}")
    endif()
endforeach()

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/")
include(FeatureSummary)
include(CheckCXXCompilerFlag)

if(NOT DEFINED CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose the type of build, options are: Debug Release RelWithDebInfo" FORCE)
endif()

project(VanillaConquer C CXX)

option(BUILD_REMASTERTD "Build Tiberian Dawn remaster dll." OFF)
option(BUILD_REMASTERRA "Build Red Alert remaster dll." OFF)
option(BUILD_VANILLATD "Build Tiberian Dawn executable." ON)
option(BUILD_VANILLARA "Build Red Alert executable." ON)
option(MAP_EDITORTD "Include internal scenario editor in Tiberian Dawn build." OFF)
option(MAP_EDITORRA "Include internal scenario editor in Red Alert build." OFF)
option(NETWORKING "Enable network play." ON)
option(WIN9X "Enable support for Windows 95/98/ME." OFF)
option(DSOUND "Enable DirectSound audio. (deprecated)" OFF)
option(DDRAW "Enable DirectDraw video backend. (deprecated)" OFF)
option(SDL1 "Enable SDL1 video backend." OFF)
option(SDL2 "Enable SDL2 video backend." ON)
option(OPENAL "Enable OpenAL audio backend." ON)
option(BUILD_TESTS "Build unit tests." OFF)
option(BUILD_TOOLS "Build modding utilities." OFF)
option(BUILD_WITH_UBSAN "Build with undefined behavior sanitizer" OFF)
option(BUILD_WITH_ASAN "Build with address sanitizer" OFF)
option(GERMAN "Use German instead of English." OFF)
option(FRENCH "Use French instead of English." OFF)

if(WIN32 OR CMAKE_SYSTEM_NAME STREQUAL "Windows")
    option(WIN9X "Enable support for Windows 95/98/ME." OFF)
    option(DSOUND "Enable DirectSound audio. (deprecated)" OFF)
    option(DDRAW "Enable DirectDraw video backend. (deprecated)" OFF)
    add_feature_info(Windows9x WIN9X "Windows 95/98/ME support" OFF)
    add_feature_info(DirectSound DSOUND "DirectSound audio backend (deprecated)")
    add_feature_info(DirectDraw DDRAW "DirectDraw video backend (deprecated)")
endif()

if(APPLE OR ${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
    option(MAKE_BUNDLE "Create a standard app bundle rather than command line program." ON)   
    add_feature_info(MakeBundle MAKE_BUNDLE "App bundles will be generated")
    if(MAKE_BUNDLE)
        set(MAKE_BUNDLE_OPTION MACOSX_BUNDLE)
    endif()
endif()

add_feature_info(SDL1 SDL1 "SDL1 video backend")
add_feature_info(SDL2 SDL2 "SDL2 video backend")
add_feature_info(OpenAL OPENAL "OpenAL audio backend")
add_feature_info(RemasterTD BUILD_REMASTERTD, "Remastered Tiberian Dawn dll")
add_feature_info(RemasterRA BUILD_REMASTERRA "Remastered Red Alert dll")
add_feature_info(VanillaTD BUILD_VANILLATD "Tiberian Dawn executable")
add_feature_info(VanillaRA BUILD_VANILLARA "Red Alert executable")
add_feature_info(MapEditorTD MAP_EDITORTD "Include internal scenario editor in VanillaTD")
add_feature_info(MapEditorRA MAP_EDITORRA "Include internal scenario editor in VanillaRA")
add_feature_info(Networking NETWORKING "Networking support")
add_feature_info(Tests BUILD_TESTS "Unit tests")
add_feature_info(Tools BUILD_TOOLS "Mod developer tools")

if(NOT BUILD_VANILLATD AND NOT BUILD_VANILLARA AND NOT BUILD_TESTS)
    set(DSOUND OFF)
    set(DDRAW OFF)
    set(SDL1 OFF)
    set(SDL2 OFF)
    set(OPENAL OFF)
endif()

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR})

include(Compilers)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_FIND_FRAMEWORK "LAST")

add_definitions(-DTRUE_FALSE_DEFINED)

if(GERMAN)
    add_definitions(-DGERMAN)
elseif(FRENCH)
    add_definitions(-DFRENCH)
else()
    add_definitions(-DENGLISH)
endif()

if(WIN32)
    add_definitions(-DWIN32 -D_WINDOWS -D_CRT_SECURE_NO_DEPRECATE -D_CRT_NONSTDC_NO_DEPRECATE -DNOMINMAX)
    set(COMMON_LIBS winmm)
endif()

set(VANILLA_DEFS "")
set(VANILLA_LIBS "")

set(REMASTER_DEFS _USRDLL REMASTER_BUILD)
set(REMASTER_LIBS "")

find_package(ClangFormat)
include(ClangFormat)

if(NOT BUILD_VANILLATD AND MAP_EDITORTD)
    message(WARNING "Internal scenario editor requires a Tiberian Dawn executable to be built, but it was not enabled.")
    set(BUILD_VANILLATD TRUE)
endif()

if(NOT BUILD_VANILLARA AND MAP_EDITORRA)
    message(WARNING "Internal scenario editor requires a Red Alert executable to be built, but it is not enabled.")
    set(BUILD_VANILLARA TRUE)
endif()

if(NETWORKING)
    list(APPEND VANILLA_DEFS NETWORKING)
    if(WIN32)
        list(APPEND VANILLA_LIBS ws2_32)
    endif()
endif()

if(SDL1)
    find_package(SDL REQUIRED)
    list(APPEND VANILLA_LIBS ${SDL_LIBRARY})
    include_directories(${SDL_INCLUDE_DIR})

    # winuser.h defines VK_ macros but it can be prevented
    if(WIN32)
        add_definitions(-DNOVIRTUALKEYCODES)
    endif()
    set(DDRAW OFF)
    set(SDL2 OFF)
endif()

if(SDL2)
    message("Find path is ${CMAKE_FIND_ROOT_PATH}")
    find_package(SDL2 REQUIRED)
    list(APPEND VANILLA_LIBS ${SDL2_LIBRARY})
    include_directories(${SDL2_INCLUDE_DIR})

    # winuser.h defines VK_ macros but it can be prevented
    if(WIN32)
        add_definitions(-DNOVIRTUALKEYCODES)
    endif()
    set(DDRAW OFF)
endif()

if(OPENAL)
    find_package(OpenAL REQUIRED)
    list(APPEND VANILLA_LIBS OpenAL::OpenAL)
    set(DSOUND OFF)
endif()

if(BUILD_TESTS)
    # Tests need to respect some options so need to occur after the options are set.
    enable_testing()
    add_subdirectory(tests)
endif()

add_subdirectory(common)
add_subdirectory(tiberiandawn)
add_subdirectory(redalert)
add_subdirectory(tools)

feature_summary(WHAT ENABLED_FEATURES DESCRIPTION "Enabled features:")
feature_summary(WHAT DISABLED_FEATURES DESCRIPTION "Disabled features:")