cmake_minimum_required(VERSION 3.9)

project( qmqtt VERSION 1.0.3 )

include( GNUInstallDirs ) # needed to define vars used in install() directives.


# ===================================================================
# Configurable options

option( ${PROJECT_NAME}_SHARED "Build a shared library.  Turn off for static." OFF )
option( ${PROJECT_NAME}_WEBSOCKETS "Enable WebSockets for MQTT" OFF )
option( ${PROJECT_NAME}_SSL "Enable SSL support for MQTT" ON )

if ( ${PROJECT_NAME}_SHARED )
 set(library_build_type SHARED )
 set(library_install_component Library )
else()
 set(library_build_type STATIC )
 set(library_install_component Devel )
endif()


set(ws_component )
set(ws_libname )
set(qt5_min_version "5.3.0" )
set(qt6_min_version "6.2.4" )

if ( ${PROJECT_NAME}_WEBSOCKETS )
 set(ws_component WebSockets )
 set(qt5_min_version "5.7.0" )
endif()

if ( NOT ${PROJECT_NAME}_SSL)
 set(ssl_defs QT_NO_SSL )
endif()

find_package(Qt6 ${qt6_min_version} COMPONENTS Core Network ${ws_component} CONFIG)
if(NOT Qt6_FOUND)
 find_package(Qt5 ${qt5_min_version} COMPONENTS Core Network ${ws_component} REQUIRED)
endif()

if(${PROJECT_NAME}_WEBSOCKETS)
 set(ws_libname "Qt${QT_VERSION_MAJOR}::WebSockets" )
 find_package(Qt${QT_VERSION_MAJOR} COMPONENTS WebSockets REQUIRED)
endif()

set(CMAKE_AUTOMOC ON )
cmake_policy( SET CMP0020 NEW ) # Automatically link Qt executables to qtmain target on Windows.


# ===================================================================
# Project files

set(PUBLIC_HEADERS
 src/mqtt/qmqtt_global.h
 src/mqtt/qmqtt.h
 src/mqtt/qmqtt_client.h
 src/mqtt/qmqtt_frame.h
 src/mqtt/qmqtt_message.h
 src/mqtt/qmqtt_routesubscription.h
 src/mqtt/qmqtt_routedmessage.h
 src/mqtt/qmqtt_router.h
 src/mqtt/qmqtt_networkinterface.h
 src/mqtt/qmqtt_socketinterface.h
 src/mqtt/qmqtt_timerinterface.h
)

set(PRIVATE_HEADERS
 src/mqtt/qmqtt_client_p.h
 src/mqtt/qmqtt_message_p.h
 src/mqtt/qmqtt_network_p.h
 src/mqtt/qmqtt_socket_p.h
 src/mqtt/qmqtt_timer_p.h
)

set(SOURCES
 src/mqtt/qmqtt_client_p.cpp
 src/mqtt/qmqtt_client.cpp
 src/mqtt/qmqtt_frame.cpp
 src/mqtt/qmqtt_message.cpp
 src/mqtt/qmqtt_network.cpp
 src/mqtt/qmqtt_routesubscription.cpp
 src/mqtt/qmqtt_router.cpp
 src/mqtt/qmqtt_socket.cpp
 src/mqtt/qmqtt_timer.cpp
)

if ( ${PROJECT_NAME}_WEBSOCKETS )
 list( APPEND PRIVATE_HEADERS
  src/mqtt/qmqtt_websocket_p.h
  src/mqtt/qmqtt_websocketiodevice_p.h
 )
list( APPEND SOURCES
 src/mqtt/qmqtt_websocket.cpp
 src/mqtt/qmqtt_websocketiodevice.cpp
)
endif()

if ( ${PROJECT_NAME}_SSL)
 list( APPEND PRIVATE_HEADERS
  src/mqtt/qmqtt_ssl_socket_p.h
 )
list( APPEND SOURCES
 src/mqtt/qmqtt_ssl_socket.cpp
)
endif()


# Mark public headers as such
set_source_files_properties( ${PUBLIC_HEADERS} PROPERTIES PUBLIC_HEADER 1 )


# ===================================================================
# Library target

# Library has the same name as the project
add_library( ${PROJECT_NAME} ${library_build_type} ${SOURCES} ${PUBLIC_HEADERS} ${PRIVATE_HEADERS} )
target_link_libraries( ${PROJECT_NAME} PUBLIC Qt${QT_VERSION_MAJOR}::Core Qt${QT_VERSION_MAJOR}::Network ${ws_libname} )
target_compile_definitions( ${PROJECT_NAME}
 PRIVATE
 QT_NO_CAST_FROM_ASCII
 QT_NO_CAST_TO_ASCII
 QT_STATIC
)

# Where to look for headers while compiling the target or when compiling against
# the target.
target_include_directories( ${PROJECT_NAME}
 PUBLIC
 $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src/mqtt>
 $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
)

set_target_properties( ${PROJECT_NAME}
 PROPERTIES
 VERSION                   ${PROJECT_VERSION}
 SOVERSION                 ${PROJECT_VERSION_MAJOR}
 CXX_STANDARD              11
 CXX_STANDARD_REQUIRED     OFF  # Whether CXX_STANDARD is enforced
)

if ( ${CMAKE_HOST_WIN32} )
 # On Windows, libraries are not generally prefixed with "lib".
 # If left unchanged, cmake will still add this prefix.
 set_target_properties( ${PROJECT_NAME}
  PROPERTIES
  PREFIX        ""
  IMPORT_PREFIX ""
 )
endif()