#
# 全局变量、路径、日志、工具函数
#

# 日志宏
macro(DEPLOY_MSG MSG)
    message(STATUS "[DEPLOY] ${MSG}")
endmacro()

# 校验 root 权限（系统包/系统目录需要）
function(CHECK_ROOT)
    execute_process(
        COMMAND id -u
        OUTPUT_VARIABLE CURRENT_UID
        OUTPUT_STRIP_TRAILING_WHITESPACE
    )
    if(NOT CURRENT_UID STREQUAL "0")
        message(FATAL_ERROR "Please run cmake/make with root privileges!")
    endif()
endfunction()

# ===================== 编译器自动检测&安装 =====================
function(CheckAndInstallCompiler)
    DEPLOY_MSG("Checking GCC/G++ compiler...")

    # 查找 gcc g++
    find_program(GCC_EXEC gcc)
    find_program(GXX_EXEC g++)

    if(NOT GCC_EXEC OR NOT GXX_EXEC)
        DEPLOY_MSG("GCC/G++ not found, start installing via dnf...")
        CHECK_ROOT()

        # dnf 安装 gcc gcc-c++
        execute_process(
            COMMAND dnf install -y gcc gcc-c++
            RESULT_VARIABLE COMP_RET
            OUTPUT_VARIABLE COMP_OUT
            ERROR_VARIABLE COMP_ERR
        )

        if(NOT COMP_RET EQUAL 0)
            message(FATAL_ERROR "Failed to install GCC/G++: ${COMP_ERR}")
        endif()

        DEPLOY_MSG("GCC/G++ installed successfully")

        # 重新刷新程序查找，让CMake识别新安装的编译器
        find_program(GCC_EXEC gcc REQUIRED)
        find_program(GXX_EXEC g++ REQUIRED)
    else()
        DEPLOY_MSG("Found compiler: ${GCC_EXEC}, ${GXX_EXEC}")
    endif()

    # 赋值给全局 CMake 编译器变量
    set(CMAKE_C_COMPILER   ${GCC_EXEC} CACHE FILEPATH "C compiler" FORCE)
    set(CMAKE_CXX_COMPILER ${GXX_EXEC} CACHE FILEPATH "CXX compiler" FORCE)
endfunction()

# 统一安装路径拼接
function(SET_INSTALL_PATH NAME VER OUT_PATH)
    set(${OUT_PATH} "${INSTALL_ROOT}/${NAME}/${VER}" PARENT_SCOPE)
endfunction()

# 基础编译参数
set(CMAKE_C_FLAGS   "-O2" CACHE STRING "C flags")
set(CMAKE_CXX_FLAGS "-O2" CACHE STRING "C++ flags")