cmake_minimum_required(VERSION 3.12)
project(CommonPacket VERSION 1.0.0 LANGUAGES CXX)

# === 基础配置 ===
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
set(CMAKE_POSITION_INDEPENDENT_CODE ON)

# 添加编译选项: -g 生成调试信息, -fPIC 位置无关代码
add_compile_options(-g -fPIC)

# 添加地址 sanitizer 选项（用于检测内存错误）
# 仅在 Debug 模式下启用，避免影响 Release 性能
set(SANITIZE_OPTIONS -fsanitize=address)
add_compile_options($<$<CONFIG:Debug>:${SANITIZE_OPTIONS}>)
link_libraries($<$<CONFIG:Debug>:${SANITIZE_OPTIONS}>)

# === 输出目录配置 ===
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

# === 路径配置 ===
set(SRC_DIR ${CMAKE_CURRENT_SOURCE_DIR})
set(INCLUDE_DIR ${SRC_DIR})

# 核心交付目录【复用，无需修改】
set(DELIVER_DIR "${CMAKE_BINARY_DIR}/../../Deliver" CACHE PATH "交付目录路径")
get_filename_component(DELIVER_DIR ${DELIVER_DIR} ABSOLUTE)
message(STATUS "交付目录: ${DELIVER_DIR}")

set(CCOSLOCK_INCLUDE_DIR "${DELIVER_DIR}/include")
set(CCOSLOCK_LIB_DIR "${DELIVER_DIR}/lib")
get_filename_component(CCOSLOCK_INCLUDE_DIR ${CCOSLOCK_INCLUDE_DIR} ABSOLUTE)
get_filename_component(CCOSLOCK_LIB_DIR ${CCOSLOCK_LIB_DIR} ABSOLUTE)
message(STATUS "CcosLock 头文件目录: ${CCOSLOCK_INCLUDE_DIR}")
message(STATUS "CcosLock 库文件目录: ${CCOSLOCK_LIB_DIR}")

set(CRC64_INCLUDE_DIR "${DELIVER_DIR}/include")
set(CRC64_LIB_DIR "${DELIVER_DIR}/lib")
get_filename_component(CRC64_INCLUDE_DIR ${CRC64_INCLUDE_DIR} ABSOLUTE)
get_filename_component(CRC64_LIB_DIR ${CRC64_LIB_DIR} ABSOLUTE)
message(STATUS "Crc64 头文件目录: ${CRC64_INCLUDE_DIR}")
message(STATUS "Crc64 库文件目录: ${CRC64_LIB_DIR}")

# === 源文件与头文件 ===
set(SRC_FILES
    ${SRC_DIR}/PacketAnalizer.cpp
)

set(HEADER_FILES
    ${INCLUDE_DIR}/PacketAnalizer.h
)

# 验证当前工程头文件是否存在
foreach(header ${HEADER_FILES})
    if(NOT EXISTS ${header})
        message(FATAL_ERROR "头文件不存在: ${header}")
    endif()
endforeach()

if(NOT EXISTS "${CCOSLOCK_INCLUDE_DIR}/CcosLock.h")
    message(FATAL_ERROR "CcosLock.h 不存在于 ${CCOSLOCK_INCLUDE_DIR}")
endif()

if(NOT EXISTS "${CRC64_INCLUDE_DIR}/Crc64.h")
    message(FATAL_ERROR "Crc64.h 不存在于 ${CRC64_INCLUDE_DIR}")
endif()

find_library(CCOSLOCK_LIB
    NAMES CcosLock libCcosLock  # 同时检查带/不带lib前缀的库名
    PATHS ${CCOSLOCK_LIB_DIR}
    NO_DEFAULT_PATH  # 只在指定目录查找，不搜索系统默认路径
)
if(NOT CCOSLOCK_LIB)
    message(FATAL_ERROR "找不到CcosLock库，路径: ${CCOSLOCK_LIB_DIR}")
else()
    message(STATUS "找到CcosLock库: ${CCOSLOCK_LIB}")
endif()

find_library(CRC64_LIB
    NAMES Crc64 libCrc64  # 同时检查带/不带lib前缀的库名
    PATHS ${CRC64_LIB_DIR}
    NO_DEFAULT_PATH  # 只在指定目录查找，不搜索系统默认路径
)
if(NOT CRC64_LIB)
    message(FATAL_ERROR "找不到Crc64库，路径: ${CRC64_LIB_DIR}")
else()
    message(STATUS "找到Crc64库: ${CRC64_LIB}")
endif()

# === 构建共享库 ===
add_library(CommonPacket SHARED ${SRC_FILES} ${HEADER_FILES})

# === 目标属性配置 ===
set_target_properties(CommonPacket PROPERTIES
    VERSION ${PROJECT_VERSION}
    SOVERSION 1
    OUTPUT_NAME "CommonPacket"
    PUBLIC_HEADER "${HEADER_FILES}"
)

# === 编译选项 ===
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
    target_compile_options(CommonPacket PRIVATE -Wall -Wextra -Wpedantic -Werror=return-type)
elseif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
    target_compile_options(CommonPacket PRIVATE -Wall -Wextra -Wpedantic -Werror=return-type)
endif()

# === 依赖配置 - 头文件目录 ===
target_include_directories(CommonPacket
    PUBLIC
        $<BUILD_INTERFACE:${INCLUDE_DIR}>
        $<BUILD_INTERFACE:${CCOSLOCK_INCLUDE_DIR}>
        $<BUILD_INTERFACE:${CRC64_INCLUDE_DIR}>  # 【新增】添加CRC64头文件目录
        $<INSTALL_INTERFACE:include>
)

# === 依赖配置 - 链接库【核心修改】===
# 同时链接：CcosLock + Crc64 + pthread + dl，所有依赖一次性配置完成
target_link_libraries(CommonPacket
    PUBLIC
        ${CCOSLOCK_LIB}   # 原有：CcosLock库
        ${CRC64_LIB}      # 新增：Crc64/libCrc库
    PRIVATE
        pthread
        dl
)

# === 交付与安装 ===
file(MAKE_DIRECTORY
    ${DELIVER_DIR}/lib
    ${DELIVER_DIR}/include
)

add_custom_command(TARGET CommonPacket POST_BUILD
    COMMENT "复制构建产物到交付目录: ${DELIVER_DIR}"
    # 1. 确保交付目录存在（避免链接/复制失败）
    COMMAND ${CMAKE_COMMAND} -E make_directory "${DELIVER_DIR}/lib"
    COMMAND ${CMAKE_COMMAND} -E make_directory "${DELIVER_DIR}/include"
    
    # 2. 复制核心库文件（唯一真实二进制文件，如 libCommonPacket.so.1.0.0）
    COMMAND ${CMAKE_COMMAND} -E echo "复制CommonPacket核心库文件..."
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
        "$<TARGET_FILE:CommonPacket>"          # 源：完整版本核心库（含全版本号）
        "${DELIVER_DIR}/lib/"                # 目标：交付目录的lib文件夹
    
    # 3. 创建主版本符号链接（如 libCommonPacket.so.1 -> libCommonPacket.so.1.0.0）
    COMMAND ${CMAKE_COMMAND} -E echo "创建CommonPacket主版本符号链接..."
    COMMAND ${CMAKE_COMMAND} -E create_symlink
        "$<TARGET_FILE_NAME:CommonPacket>"     # 链接指向的目标（核心库文件名）
        "${DELIVER_DIR}/lib/$<TARGET_SONAME_FILE_NAME:CommonPacket>"  # 链接文件本身（主版本名）
    
    # 4. 创建通用符号链接（如 libCommonPacket.so -> libCommonPacket.so.1）
    COMMAND ${CMAKE_COMMAND} -E echo "创建CommonPacket通用符号链接..."
    COMMAND ${CMAKE_COMMAND} -E create_symlink
        "$<TARGET_SONAME_FILE_NAME:CommonPacket>"  # 链接指向的目标（主版本链接名）
        "${DELIVER_DIR}/lib/$<TARGET_LINKER_FILE_NAME:CommonPacket>"  # 链接文件本身（通用名）
    
    # 5. 复制头文件（保持原逻辑，确保头文件正确交付）
    COMMAND ${CMAKE_COMMAND} -E echo "复制CommonPacket头文件..."
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
        ${HEADER_FILES}
        ${DELIVER_DIR}/include/
)

# 安装配置
install(TARGETS CommonPacket
    EXPORT CommonPacketTargets
    LIBRARY DESTINATION lib
    ARCHIVE DESTINATION lib
    PUBLIC_HEADER DESTINATION include
)

install(EXPORT CommonPacketTargets
    FILE CommonPacketConfig.cmake
    DESTINATION lib/cmake/CommonPacket
    EXPORT_LINK_INTERFACE_LIBRARIES
)

# === 调试辅助 - 【新增CRC64日志】===
message(STATUS "CommonPacket 源文件: ${SRC_FILES}")
message(STATUS "CommonPacket 头文件: ${HEADER_FILES}")
message(STATUS "CommonPacket 链接库: ${CCOSLOCK_LIB} ${CRC64_LIB} pthread dl")