# CMakeLists.txt für Qt6-Migrationstests
# Diese Tests validieren BUILD_RTI Guards, Qt6-Kompatibilität und RTI-Integration

cmake_minimum_required(VERSION 3.16)

# Qt6 finden (wird vom Hauptprojekt gesetzt, aber sicherheitshalber hier auch)
find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets Test)

# Try to find system-wide GTest first, fallback to FetchContent
find_package(GTest QUIET)
if(NOT TARGET GTest::gtest_main)
    include(FetchContent)
    FetchContent_Declare(
      googletest
      GIT_REPOSITORY https://github.com/google/googletest.git
      GIT_TAG v1.13.0
    )
    # For Windows: Prevent overriding the parent project's compiler/linker settings
    set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
    FetchContent_MakeAvailable(googletest)
endif()

# Nur bauen wenn BUILD_TESTING aktiviert ist
if(BUILD_TESTING)
    # Collect all test source files dynamically
    file(GLOB MIGRATION_TEST_SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/test_*.cpp")

    if(MIGRATION_TEST_SOURCES)
        set(EXISTING_SOURCES ${MIGRATION_TEST_SOURCES})

        add_executable(migration_tests ${EXISTING_SOURCES})
        
        # Enable Qt Meta-Object Compiler for tests with Q_OBJECT
        set_target_properties(migration_tests PROPERTIES AUTOMOC ON)
        
        # Exclude tests for non-existent or commented-out components
        list(FILTER EXISTING_SOURCES EXCLUDE REGEX "test_lts_app_descriptor_editor\\.cpp")
        
        target_compile_features(migration_tests PRIVATE cxx_std_23)
        
        target_include_directories(migration_tests PRIVATE
            ${CMAKE_SOURCE_DIR}
            ${CMAKE_SOURCE_DIR}/include
            ${CMAKE_SOURCE_DIR}/qt6-after/qt6-migrated-legatus
            ${CMAKE_SOURCE_DIR}/qt6-after/qt6-migrated-legatus/include
            ${CMAKE_SOURCE_DIR}/qt6-after/qt6-migrated-legatus/DDS
            ${CMAKE_BINARY_DIR}/Lts/Common
            ${CMAKE_BINARY_DIR}/Lts/Common/CodeGen
            ${CMAKE_BINARY_DIR}/Lts/Common/LtsTimeline
        )
        
        # Link against Qt6 components and LtsTimelineClassic (provides export header)
        target_link_libraries(migration_tests PRIVATE
            Qt6::Core
            Qt6::Gui
            Qt6::Widgets
            Qt6::Test
            GTest::gtest_main
            LtsTimelineClassic
        )
        
        # Ensure LtsTimelineClassic is built before tests (generates export header)
        add_dependencies(migration_tests LtsTimelineClassic)
        
        # Grantlee tests require BUILD_GRANTLEE=ON
        if(BUILD_GRANTLEE)
            target_link_libraries(migration_tests PRIVATE codegen_grantlee)
            target_include_directories(migration_tests PRIVATE
                ${CMAKE_SOURCE_DIR}/qt6-after/qt6-migrated-legatus/Lts/Common/CodeGen
            )
            message(STATUS "Migration tests: Grantlee support enabled")
        else()
            # Exclude Grantlee-related tests when BUILD_GRANTLEE is OFF
            list(FILTER EXISTING_SOURCES EXCLUDE REGEX "test_.*Grantlee.*\\.cpp")
            message(STATUS "Migration tests: Grantlee support disabled (BUILD_GRANTLEE=OFF), excluded Grantlee tests")
            # Re-create executable with filtered sources
            if(EXISTING_SOURCES)
                set_target_properties(migration_tests PROPERTIES
                    SOURCES "${EXISTING_SOURCES}"
                )
            else()
                message(WARNING "No non-Grantlee migration tests found - skipping migration_tests target")
                return()
            endif()
        endif()
        
        # RTI libraries if BUILD_RTI is ON
        if(BUILD_RTI)
            find_package(RTI QUIET)
            if(RTI_FOUND)
                target_include_directories(migration_tests PRIVATE ${RTI_INCLUDE_DIRS})
                target_link_libraries(migration_tests PRIVATE ${RTI_LIBRARIES})
                target_compile_definitions(migration_tests PRIVATE BUILD_RTI=1)
                message(STATUS "RTI found: ${RTI_LIBRARIES}")
            else()
                message(STATUS "BUILD_RTI=ON but RTI not found - building tests without RTI")
            endif()
        endif()
        
        # Register with CTest
        include(GoogleTest)
        gtest_discover_tests(migration_tests)
        
        message(STATUS "Migration tests enabled: ${EXISTING_SOURCES}")
    else()
        message(WARNING "No migration test sources found in ${CMAKE_CURRENT_SOURCE_DIR}")
    endif()
endif()