# Find a compatible Qt version
# Inputs: WITH_SERVER, WITH_CLIENT, WITH_ORACLE, WITH_DBCONVERTER, FORCE_USE_QT5
# Optional Input: QT6_DIR -- Hint as to where Qt6 lives on the system
# Optional Input: QT5_DIR -- Hint as to where Qt5 lives on the system
# Output: COCKATRICE_QT_VERSION_NAME -- Example values: Qt5, Qt6
# Output: SERVATRICE_QT_MODULES
# Output: COCKATRICE_QT_MODULES
# Output: ORACLE_QT_MODULES
# Output: DBCONVERTER_QT_MODULES
# Output: TEST_QT_MODULES

set(REQUIRED_QT_COMPONENTS Core)
if(WITH_SERVER)
    set(_SERVATRICE_NEEDED Network Sql WebSockets)
endif()
if(WITH_CLIENT)
    set(_COCKATRICE_NEEDED Concurrent Gui Multimedia Network PrintSupport Svg Widgets WebSockets)
endif()
if(WITH_ORACLE)
    set(_ORACLE_NEEDED Concurrent Network Svg Widgets)
endif()
if(WITH_DBCONVERTER)
    set(_DBCONVERTER_NEEDED Network Widgets)
endif()
if(TEST)
    set(_TEST_NEEDED Widgets)
endif()

set(REQUIRED_QT_COMPONENTS
        ${REQUIRED_QT_COMPONENTS}
        ${_SERVATRICE_NEEDED}
        ${_COCKATRICE_NEEDED}
        ${_ORACLE_NEEDED}
        ${_DBCONVERTER_NEEDED}
        ${_TEST_NEEDED})
list(REMOVE_DUPLICATES REQUIRED_QT_COMPONENTS)

if(NOT FORCE_USE_QT5)
    # Core5Compat is Qt6 Only, Linguist is now a component in Qt6 instead of an external package
    find_package(Qt6 6.2.3
            COMPONENTS Core5Compat ${REQUIRED_QT_COMPONENTS}
            OPTIONAL_COMPONENTS Linguist
            QUIET
            HINTS ${Qt6_DIR})
endif()
if(Qt6_FOUND)
    set(COCKATRICE_QT_VERSION_NAME Qt6)

    if(Qt6LinguistTools_FOUND)
        list(FIND Qt6LinguistTools_TARGETS Qt6::lrelease QT6_LRELEASE_INDEX)
        if(QT6_LRELEASE_INDEX EQUAL -1)
            message(WARNING "Qt6 lrelease not found.")
        endif()

        list(FIND Qt6LinguistTools_TARGETS Qt6::lupdate QT6_LUPDATE_INDEX)
        if(QT6_LUPDATE_INDEX EQUAL -1)
            message(WARNING "Qt6 lupdate not found.")
        endif()
    endif()
else()
    find_package(Qt5 5.8.0
            COMPONENTS ${REQUIRED_QT_COMPONENTS}
            QUIET
            HINTS ${Qt5_DIR})
    if(Qt5_FOUND)
        set(COCKATRICE_QT_VERSION_NAME Qt5)
    else()
        message(FATAL_ERROR "No suitable version of Qt was found")
    endif()

    # Qt5 Linguist is in a separate package
    find_package(Qt5LinguistTools QUIET)
    if (Qt5LinguistTools_FOUND)
        if(NOT Qt5_LRELEASE_EXECUTABLE)
            message(WARNING "Qt5 lrelease not found.")
        endif()
        if(NOT Qt5_LUPDATE_EXECUTABLE)
            message(WARNING "Qt5 lupdate not found.")
        endif()
    else()
        message(WARNING "Linguist Tools not found, cannot handle translations")
    endif()
endif()

if(Qt5_POSITION_INDEPENDENT_CODE OR Qt6_FOUND)
    set(CMAKE_POSITION_INDEPENDENT_CODE ON)
endif()

# Establish Qt Plugins directory & Library directories
get_target_property(QT_LIBRARY_DIR ${COCKATRICE_QT_VERSION_NAME}::Core LOCATION)
get_filename_component(QT_LIBRARY_DIR ${QT_LIBRARY_DIR} DIRECTORY)
if(Qt6_FOUND)
    get_filename_component(QT_PLUGINS_DIR "${Qt6Core_DIR}/../../../${QT6_INSTALL_PLUGINS}" ABSOLUTE)
    get_filename_component(QT_LIBRARY_DIR "${QT_LIBRARY_DIR}/../../.." ABSOLUTE)
    if(UNIX AND APPLE)
        # Mac needs a bit more help finding all necessary components
        list(APPEND QT_LIBRARY_DIR "/usr/local/lib")
    endif()
elseif(Qt5_FOUND)
    get_filename_component(QT_PLUGINS_DIR "${Qt5Core_DIR}/../../../plugins" ABSOLUTE)
    get_filename_component(QT_LIBRARY_DIR "${QT_LIBRARY_DIR}/.." ABSOLUTE)
endif()
message(DEBUG "QT_PLUGINS_DIR = ${QT_PLUGINS_DIR}")
message(DEBUG "QT_LIBRARY_DIR = ${QT_LIBRARY_DIR}")

# Establish exports
string(REGEX REPLACE "([^;]+)" "${COCKATRICE_QT_VERSION_NAME}::\\1" SERVATRICE_QT_MODULES "${_SERVATRICE_NEEDED}")
string(REGEX REPLACE "([^;]+)" "${COCKATRICE_QT_VERSION_NAME}::\\1" COCKATRICE_QT_MODULES "${_COCKATRICE_NEEDED}")
string(REGEX REPLACE "([^;]+)" "${COCKATRICE_QT_VERSION_NAME}::\\1" ORACLE_QT_MODULES "${_ORACLE_NEEDED}")
string(REGEX REPLACE "([^;]+)" "${COCKATRICE_QT_VERSION_NAME}::\\1" DB_CONVERTER_QT_MODULES "${_DBCONVERTER_NEEDED}")
string(REGEX REPLACE "([^;]+)" "${COCKATRICE_QT_VERSION_NAME}::\\1" TEST_QT_MODULES "${_TEST_NEEDED}")
if(Qt6_FOUND)
    list(APPEND SERVATRICE_QT_MODULES ${COCKATRICE_QT_VERSION_NAME}::Core5Compat)
    list(APPEND COCKATRICE_QT_MODULES ${COCKATRICE_QT_VERSION_NAME}::Core5Compat)
    LIST(APPEND ORACLE_QT_MODULES ${COCKATRICE_QT_VERSION_NAME}::Core5Compat)
endif()

message(STATUS "Found Qt ${${COCKATRICE_QT_VERSION_NAME}_VERSION} at: ${${COCKATRICE_QT_VERSION_NAME}_DIR}")