#这里需要区分Qt版本，因此要放到find_package(qt)之后

message(STATUS "***** Find qmqtt.cmake *****")

# 0. 定义qmqtt版本


# 1. 指定头文件路径
unset(QMQTT_INCLUDE_DIR CACHE)
unset(QMQTT_LIBRARY CACHE)
unset(INCLUDE_DIR CACHE)
find_path(INCLUDE_DIR
    NAMES qmqtt.h
    PATHS ${CMAKE_CURRENT_LIST_DIR}/inc
    NO_DEFAULT_PATH
)

list(APPEND QMQTT_INCLUDE_DIR ${INCLUDE_DIR})

unset(INCLUDE_DIR CACHE)
find_path(INCLUDE_DIR
    NAMES MQTTBase.h
    PATHS ${CMAKE_CURRENT_LIST_DIR}/mqttBase
    NO_DEFAULT_PATH
)

list(APPEND QMQTT_INCLUDE_DIR ${INCLUDE_DIR})


#添加源文件
unset(QMQTT_SOURCES CACHE)
find_path(INCLUDE_DIR
    NAMES MQTTBase.cpp
    PATHS ${CMAKE_CURRENT_LIST_DIR}/mqttBase
    NO_DEFAULT_PATH
)

list(APPEND QMQTT_SOURCES ${INCLUDE_DIR}/MQTTBase.cpp)


#区分Qt版本
if(QT_VERSION_MAJOR EQUAL 5)
    # message(STATUS "----------------Qt Version : ${Qt5Core_VERSION}")
    if(${Qt5Core_VERSION} VERSION_LESS 5.15.0 AND ${Qt5Core_VERSION} VERSION_GREATER 5.12.0)
        set(QtVersion 5.12)
    elseif(${Qt5Core_VERSION} VERSION_GREATER_EQUAL 5.15.0)
        set(QtVersion 5.15)
    endif()
    
elseif(QT_VERSION_MAJOR EQUAL 6)
    message(STATUS "Qt Version : ${Qt6Core_VERSION}")
    message(STATUS "qmqtt not support Qt6")
endif()


# 2. 直接指定库文件，区分gcc，msvc，debug和release
unset(QMQTT_LIBRARY CACHE)
if(CMAKE_SYSTEM_NAME MATCHES "Windows")
    if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
        if(QtVersion STREQUAL "5.12")
            if(CMAKE_BUILD_TYPE STREQUAL "Debug")
                list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/gcc/5.12.12/Qt5Qmqttd.dll)
            else()
                list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/gcc/5.12.12/Qt5Qmqtt.dll)
            endif()
        elseif(QtVersion STREQUAL "5.15")
            if(CMAKE_BUILD_TYPE STREQUAL "Debug")
                list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/gcc/5.15.2/debug/Qt5Qmqtt.dll)
            else()
                list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/gcc/5.15.2/release/Qt5Qmqtt.dll)
            endif()
        endif()
    elseif(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
        # message(STATUS "MSVC")
        if(QtVersion STREQUAL "5.12")
            if(CMAKE_BUILD_TYPE STREQUAL "Debug")
                list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/msvc/5.12.12/Qt5Qmqttd.lib)
            else()
                list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/msvc/5.12.12/Qt5Qmqtt.lib)
            endif(CMAKE_BUILD_TYPE STREQUAL "Debug")
            
        elseif(QtVersion STREQUAL "5.15")
            if(CMAKE_BUILD_TYPE STREQUAL "Debug")
                list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/msvc/5.15.2/Qt5Qmqttd.lib)
            else()
                list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/msvc/5.15.2/Qt5Qmqtt.lib)
            endif()
        endif()
    endif()
#添加Linux库
elseif(CMAKE_SYSTEM_NAME MATCHES "Linux")
    # message(STATUS "Using ${CMAKE_SYSTEM_NAME} System")
    if(QtVersion STREQUAL "5.12")
        if(CMAKE_BUILD_TYPE STREQUAL "Debug")
            list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/linux_gcc8.3/5.12.12/debug/libQt5Qmqtt.so)
        else()
            list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/linux_gcc8.3/5.12.12/release/libQt5Qmqtt.so)
        endif()
    elseif(QtVersion STREQUAL "5.15")
        if(CMAKE_BUILD_TYPE STREQUAL "Debug")
            list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/linux_gcc8.3/5.15.14/debug/libQt5Qmqtt.so)
        else()
            list(APPEND QMQTT_LIBRARY ${CMAKE_CURRENT_LIST_DIR}/lib/linux_gcc8.3/5.15.14/debug/libQt5Qmqtt.so)
        endif()
    endif()
endif()


# message("Include: " ${QMQTT_INCLUDE_DIR})
# message("Library: " ${QMQTT_LIBRARY})
# 3. 设置查找到了变量
if(QMQTT_INCLUDE_DIR AND QMQTT_LIBRARY)
    set(QMQTT_FOUND TRUE)
    set(QMQTT_VERSION 1.0.3)

    # message(STATUS "qmqtt Version : ${QMQTT_VERSION}")
    # message(STATUS "include : QMQTT_INCLUDE_DIR")
    # message(STATUS "Library : QMQTT_LIBRARY")
    # message(STATUS "Sources : QMQTT_SOURCES")

    message(STATUS "target_link_libraries(YourTarget PRIVATE External::qmqtt)")
else()
    set(QMQTT_FOUND FALSE)
endif()


message(STATUS "qmqtt Found : ${QMQTT_FOUND}")
message(STATUS "qmqtt Version : ${QMQTT_VERSION}")
message(STATUS "--------------------------------------------------")


#导入目标
if(QMQTT_FOUND)
    if(NOT TARGET External::qmqtt)
        add_library(External::qmqtt UNKNOWN IMPORTED)
        #添加头文件
        set_target_properties(External::qmqtt PROPERTIES
            INTERFACE_INCLUDE_DIRECTORIES "${QMQTT_INCLUDE_DIR}")

        #添加库文件

        set_target_properties(External::qmqtt PROPERTIES
            IMPORTED_LOCATION "${QMQTT_LIBRARY}")
        #添加spdlog需要的依赖库
        # set_target_properties(External::qmqtt PROPERTIES
        #     INTERFACE_LINK_LIBRARIES "pthread")


        #添加源文件
        set_target_properties(External::qmqtt PROPERTIES
           INTERFACE_SOURCES "${QMQTT_SOURCES}")
    endif()
endif()

# 标记这些变量为高级变量
mark_as_advanced(
    QMQTT_INCLUDE_DIR 
    QMQTT_LIBRARY 
    QMQTT_SOURCES
)