cmake_minimum_required(VERSION 3.14)

# Enable testing
enable_testing()

# Enable code coverage
if(CMAKE_COMPILER_IS_GNUCXX)
    option(CIGUI_CODE_COVERAGE "Enable code coverage reporting" OFF)
    if(CIGUI_CODE_COVERAGE)
        target_compile_options(cigui_tests PRIVATE --coverage)
        target_link_options(cigui_tests PRIVATE --coverage)
    endif()
endif()

# Add GoogleTest (fetched via CPM)
CPMAddPackage(
    NAME GTest
    GITHUB_REPOSITORY google/googletest
    VERSION 1.16.0
    OPTIONS
        "INSTALL_GTEST OFF"
        "gtest_force_shared_crt ON"
)

# Function to easily add test files
function(add_cigui_test TEST_NAME)
    add_executable(${TEST_NAME} ${ARGN})
    target_link_libraries(${TEST_NAME} PRIVATE cigui gtest gtest_main gmock)
    target_include_directories(${TEST_NAME} PRIVATE ${CMAKE_SOURCE_DIR}/src)

    # Add test to CTest
    add_test(NAME ${TEST_NAME} COMMAND ${TEST_NAME})

    # Copy DLLs on Windows when using shared libraries
    if(WIN32 AND CIGUI_BUILD_SHARED)
        add_custom_command(TARGET ${TEST_NAME} POST_BUILD
            COMMAND ${CMAKE_COMMAND} -E copy_if_different
            $<TARGET_FILE:sfml-graphics>
            $<TARGET_FILE:sfml-window>
            $<TARGET_FILE:sfml-system>
            $<TARGET_FILE:cigui>
            $<TARGET_FILE_DIR:${TEST_NAME}>
        )
    endif()
endfunction()

# Main test executable
add_executable(
    cigui_tests
    test_main.cpp
)

# Link against the library and test framework
target_link_libraries(
    cigui_tests
    PRIVATE
    cigui
    gtest
    gmock
)

# Include private headers for white-box testing
target_include_directories(
    cigui_tests
    PRIVATE
    ${CMAKE_SOURCE_DIR}/src
)

# Add main test to CTest
add_test(NAME cigui_tests COMMAND cigui_tests)

# Copy DLLs on Windows when using shared libraries
if(WIN32 AND CIGUI_BUILD_SHARED)
    add_custom_command(TARGET cigui_tests POST_BUILD
        COMMAND ${CMAKE_COMMAND} -E copy_if_different
        $<TARGET_FILE:sfml-graphics>
        $<TARGET_FILE:sfml-window>
        $<TARGET_FILE:sfml-system>
        $<TARGET_FILE:cigui>
        $<TARGET_FILE_DIR:cigui_tests>
    )
endif()

# Optional: Individual test executables
# Uncomment to build separate test executables in addition to the main one
# add_cigui_test(widget_test widgets/widget_test.cpp)
# add_cigui_test(button_test widgets/button_test.cpp)
# add_cigui_test(window_test core/window_test.cpp)