# SDL::SDL was defined on 3.20.
cmake_minimum_required(VERSION 3.20)

set(TOOLS_PREFIX ${CMAKE_BINARY_DIR}/tools)
include(ExternalProject)
ExternalProject_Add(tools
    SOURCE_DIR ${CMAKE_SOURCE_DIR}/tools
    CMAKE_ARGS
        -D CMAKE_INSTALL_PREFIX=${TOOLS_PREFIX})

project(rts C)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake)

if(CMAKE_TOOLCHAIN_FILE MATCHES "ps1")
    set(PS1_BUILD 1)
elseif(CMAKE_TOOLCHAIN_FILE MATCHES "win9x")
    set(WIN9X_BUILD 1)
    set(SDL1_2_BUILD 1)
else()
    set(HOST_BUILD 1)
    set(SDL1_2_BUILD 1)
endif()

add_executable(${PROJECT_NAME} "src/main.c")

if(SDL1_2_BUILD)
    find_package(SDL 1.2 REQUIRED)
    find_package(SDL_gfx 2.0 REQUIRED)
    find_package(SDL_mixer 1.2 REQUIRED)
    # FindSDL_mixer.cmake does not export any target, so do it here instead.
    add_library(SDL::SDL_mixer STATIC IMPORTED)
    set_property(TARGET SDL::SDL_mixer PROPERTY
        IMPORTED_LOCATION ${SDL_MIXER_LIBRARIES})
    target_include_directories(SDL::SDL_mixer INTERFACE ${SDL_MIXER_INCLUDE_DIRS})
    target_link_libraries(SDL::SDL_mixer INTERFACE SDL::SDL)
endif()

if(NOT PS1_BUILD)
    find_package(ENET 1.3 REQUIRED)
endif()

set(cdroot ${CMAKE_BINARY_DIR}/cdimg)
file(MAKE_DIRECTORY ${cdroot})

if(PS1_BUILD)
    include("cmake/ps1.cmake")
elseif(WIN9X_BUILD)
    include("cmake/win9x.cmake")
elseif(HOST_BUILD)
    include("cmake/host.cmake")
endif()

add_subdirectory("res")
add_subdirectory("src")