cmake_minimum_required(VERSION 3.20)

project(
    modern_cpp_course
    VERSION 1.0.0
    DESCRIPTION "Modern C++ course from basics to C++26"
    LANGUAGES CXX
)

set(CMAKE_CXX_STANDARD 26)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
    if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS 16)
        message(
            FATAL_ERROR
            "GCC 16+ is required (found ${CMAKE_CXX_COMPILER_VERSION}). "
            "Use the 'default' CMake preset or cmake/toolchains/gcc-16.cmake."
        )
    endif()
else()
    message(
        FATAL_ERROR
        "This project requires GCC 16+. Found compiler: ${CMAKE_CXX_COMPILER_ID}. "
        "Select the GCC 16 toolchain / default CMake preset in CLion."
    )
endif()

option(COURSE_BUILD_TESTS "Build Google Test exercise targets" ON)
option(COURSE_WARNINGS_AS_ERRORS "Treat compiler warnings as errors" OFF)
option(COURSE_ENABLE_CONTRACTS "Enable C++26 contracts on GCC 16+" ON)

list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")

include(CourseOptions)
include(CourseExercise)

add_subdirectory(support)

if(COURSE_BUILD_TESTS)
    include(FetchContent)
    FetchContent_Declare(
        googletest
        GIT_REPOSITORY https://github.com/google/googletest.git
        GIT_TAG v1.15.2
    )
    set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
    FetchContent_MakeAvailable(googletest)
    enable_testing()
    include(GoogleTest)
endif()

add_subdirectory(modules)

include(Cppcheck)
course_add_cppcheck_targets()