cmake_minimum_required(VERSION 3.12)
project(common_api 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})

# 配置ResDataObject相关路径（明确指定位置）
set(RES_DATA_INCLUDE_DIR "${CMAKE_BINARY_DIR}/../../Deliver/include")
set(RES_DATA_LIB_DIR "${CMAKE_BINARY_DIR}/../../Deliver/lib")  # 明确设置ResDataObject库所在目录
get_filename_component(RES_DATA_INCLUDE_DIR ${RES_DATA_INCLUDE_DIR} ABSOLUTE)
get_filename_component(RES_DATA_LIB_DIR ${RES_DATA_LIB_DIR} ABSOLUTE)
message(STATUS "ResDataObject 头文件目录: ${RES_DATA_INCLUDE_DIR}")
message(STATUS "ResDataObject 库文件目录: ${RES_DATA_LIB_DIR}")

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}")

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

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

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

# 验证ResDataObject相关文件是否存在
if(NOT EXISTS "${RES_DATA_INCLUDE_DIR}/ResDataObject.h")
    message(FATAL_ERROR "ResDataObject.h 不存在于 ${RES_DATA_INCLUDE_DIR}")
endif()

# 查找ResDataObject库（精确匹配指定目录）
find_library(RES_DATA_LIB
    NAMES ResDataObject libResDataObject  # 同时检查带lib前缀和不带前缀的库名
    PATHS ${RES_DATA_LIB_DIR}
    NO_DEFAULT_PATH  # 只在指定目录查找，不搜索系统默认路径
)

if(NOT RES_DATA_LIB)
    # 找不到库时列出目录内容帮助调试
    message(FATAL_ERROR "找不到ResDataObject库，路径: ${RES_DATA_LIB_DIR}\n目录内容: $(ls ${RES_DATA_LIB_DIR})")
else()
    message(STATUS "找到ResDataObject库: ${RES_DATA_LIB}")
endif()

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

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

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

# === 依赖配置 ===
target_include_directories(common_api
    PUBLIC
        $<BUILD_INTERFACE:${INCLUDE_DIR}>
        $<BUILD_INTERFACE:${RES_DATA_INCLUDE_DIR}>
        $<INSTALL_INTERFACE:include>
)

# 链接ResDataObject库和系统库
target_link_libraries(common_api
    PUBLIC
        ${RES_DATA_LIB}  # 链接ResDataObject库
    PRIVATE
        pthread
        dl
)

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

add_custom_command(TARGET common_api 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 libcommon_api.so.1.0.0）
    COMMAND ${CMAKE_COMMAND} -E echo "复制common_api核心库文件..."
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
        "$<TARGET_FILE:common_api>"          # 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 libcommon_api.so.1 -> libcommon_api.so.1.0.0）
    COMMAND ${CMAKE_COMMAND} -E echo "创建common_api主版本符号链接..."
    COMMAND ${CMAKE_COMMAND} -E create_symlink
        "$<TARGET_FILE_NAME:common_api>"     # 链接指向的目标（核心库文件名）
        "${DELIVER_DIR}/lib/$<TARGET_SONAME_FILE_NAME:common_api>"  # 链接文件本身（主版本名）
    
    # 4. 创建通用符号链接（如 libcommon_api.so -> libcommon_api.so.1）
    COMMAND ${CMAKE_COMMAND} -E echo "创建common_api通用符号链接..."
    COMMAND ${CMAKE_COMMAND} -E create_symlink
        "$<TARGET_SONAME_FILE_NAME:common_api>"  # 链接指向的目标（主版本链接名）
        "${DELIVER_DIR}/lib/$<TARGET_LINKER_FILE_NAME:common_api>"  # 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common_api头文件..."
    COMMAND ${CMAKE_COMMAND} -E copy_if_different
        ${HEADER_FILES}
        ${DELIVER_DIR}/include/
)

# 安装配置
install(TARGETS common_api
    EXPORT common_apiTargets
    LIBRARY DESTINATION lib
    ARCHIVE DESTINATION lib
    PUBLIC_HEADER DESTINATION include
)

install(EXPORT common_apiTargets
    FILE common_apiConfig.cmake
    DESTINATION lib/cmake/common_api
    EXPORT_LINK_INTERFACE_LIBRARIES
)

# === 调试辅助 ===
message(STATUS "common_api 源文件: ${SRC_FILES}")
message(STATUS "common_api 头文件: ${HEADER_FILES}")
message(STATUS "common_api 链接库: ${RES_DATA_LIB} pthread dl")