# 最低CMake版本要求：3.21 以上才支持 RUNTIME_DEPENDENCIES install 功能（自动部署 vcpkg so）
cmake_minimum_required(VERSION 3.21)

# =====================================================
# Toolchain (vcpkg)
# =====================================================
# 告诉CMake使用vcpkg作为依赖管理
# 所有 find_package(... CONFIG) 会优先搜索 vcpkg 提供的库
set(CMAKE_TOOLCHAIN_FILE
    $ENV{HOME}/vcpkg/scripts/buildsystems/vcpkg.cmake
    CACHE STRING "Vcpkg toolchain file")

# =====================================================
# Project定义
# =====================================================
project(sentinel-app LANGUAGES CXX)

# =====================================================
# 全局构建配置
# =====================================================
# 使用C++17标准
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

# 对生成的库启用位置无关代码（PIE / PIC）
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

# =====================================================
# 平台检测 执行命令获取目标机器架构
# =====================================================
execute_process(
    COMMAND gcc -dumpmachine
    OUTPUT_VARIABLE TARGET_DEVICE
    OUTPUT_STRIP_TRAILING_WHITESPACE
)

# 如果是 aarch64 (Jetson / Tegra)，定义宏 PLATFORM_TEGRA
if(TARGET_DEVICE MATCHES "aarch64")
    add_compile_definitions(PLATFORM_TEGRA)
endif()

# =====================================================
# 依赖库
# =====================================================
# pkg-config 必须，用来查询系统库的编译/链接参数
find_package(PkgConfig REQUIRED)
# vcpkg 管理的库（现代CMake target）
find_package(miniocpp CONFIG REQUIRED)  # minio C++ SDK
find_package(yaml-cpp CONFIG REQUIRED)  # yaml parser

# ========================
# 系统库 / NVIDIA stack
# ========================
pkg_check_modules(GST REQUIRED gstreamer-1.0) # gstreamer 头文件与库
pkg_check_modules(UUID REQUIRED uuid)         # uuid 库

# =====================================================
# 主可执行文件
# =====================================================
add_executable(sentinel-app
    src/app.cpp
    src/service/vehicle_event_service.cpp
    src/service/rtsp_grabber.cpp
    src/utils/ds_yml_parse.cpp
    src/utils/my_utils.cpp
)

# 编译选项
target_compile_options(sentinel-app
    PRIVATE
        -Wall                # 打开所有警告
        -Werror              # 警告当作错误
        -Wno-unused-function # 忽略未使用函数警告
)

# 包含目录
target_include_directories(sentinel-app
    PRIVATE
        src                     # 自己的源码目录
        src/service
        src/utils
        ${GST_INCLUDE_DIRS}     # gstreamer include
        /opt/nvidia/deepstream/deepstream/sources/includes # DeepStream SDK
        /usr/local/cuda/include # CUDA
)

# 链接目录（仅针对非 target 方式库）
target_link_directories(sentinel-app
    PRIVATE
        /opt/nvidia/deepstream/deepstream/lib  # DeepStream 库
        /usr/local/cuda/lib64                   # CUDA 库
)

# 链接库
target_link_libraries(sentinel-app
    PRIVATE
        # vcpkg target，现代CMake可追踪
        miniocpp::miniocpp
        yaml-cpp

        # RabbitMQ
        SimpleAmqpClient
        rabbitmq

        # 系统/DeepStream/GStreamer库
        ${GST_LIBRARIES}
        gstrtspserver-1.0
        nvds_batch_jpegenc
        nvdsgst_meta
        nvdsgst_helper
        nvds_meta
        nvds_yml_parser

        # 系统/第三方库
        uuid
        cudart
        avformat
        avcodec
        avutil
        swscale
        avdevice
        avfilter
        curl
        m
        z
        pthread
)

# =====================================================
# RPATH 设置（运行时库搜索路径）
# =====================================================
# BUILD_RPATH：构建时运行可执行文件的搜索路径
# INSTALL_RPATH：安装后运行可执行文件的搜索路径
# $ORIGIN 表示可执行文件所在目录
set_target_properties(sentinel-app PROPERTIES
    BUILD_RPATH "\$ORIGIN/lib"                      # 优先搜索 dist/lib
    INSTALL_RPATH "\$ORIGIN/lib:/opt/nvidia/deepstream/deepstream/lib"  # fallback DeepStream
)

# =====================================================
# 安装规则（部署阶段）
# =====================================================
# 安装可执行文件，并自动收集 vcpkg 的运行时 so
install(TARGETS sentinel-app
    RUNTIME_DEPENDENCIES
        PRE_EXCLUDE_REGEXES
            "ld-linux"      # 排除系统 loader
            "libc.so"       # 系统 libc
            "libm.so"       # 系统 math
            "libpthread.so" # 系统线程库
            "libdl.so"      # 系统动态库
            "libcuda"       # CUDA 系统库
            "libnvidia"     # NVIDIA 驱动
            "libnv"         # NVIDIA 系统库
            "libgst"        # GStreamer 系统库
            "libav"         # ffmpeg 系统库
            "libcrypto"    # 系统加密库
            "libssl"
        POST_EXCLUDE_REGEXES
            ".*/opt/nvidia/.*"  # 不拷贝 DeepStream 系统库
            ".*/usr/lib/.*"      # 不拷贝系统库
    RUNTIME DESTINATION .           # 可执行文件放 dist/
    LIBRARY DESTINATION lib         # 对应 so 库安装到 dist/lib/
)