cmake_minimum_required(VERSION 3.13)
# https://github.com/google/oss-policies-info/blob/main/foundational-cxx-support-matrix.md#foundational-c-support

project(test_sunshine)

include_directories("${CMAKE_SOURCE_DIR}")

enable_testing()

# Add GoogleTest directory to the project
set(GTEST_SOURCE_DIR "${CMAKE_SOURCE_DIR}/third-party/googletest")
set(INSTALL_GTEST OFF)
set(INSTALL_GMOCK OFF)
add_subdirectory("${GTEST_SOURCE_DIR}" "${CMAKE_CURRENT_BINARY_DIR}/googletest")
include_directories("${GTEST_SOURCE_DIR}/googletest/include" "${GTEST_SOURCE_DIR}")

# coverage
# https://gcovr.com/en/stable/guide/compiling.html#compiler-options
set(CMAKE_CXX_FLAGS "-fprofile-arcs -ftest-coverage -ggdb -O0")
set(CMAKE_C_FLAGS "-fprofile-arcs -ftest-coverage -ggdb -O0")

# Find the correct libgcov library path matching the gcc compiler version
# This ensures the test executable links against the same libgcov version used during compilation
if(UNIX AND NOT APPLE)
    # Get the gcc compiler version
    execute_process(
        COMMAND ${CMAKE_C_COMPILER} -dumpversion
        OUTPUT_VARIABLE GCC_VERSION
        OUTPUT_STRIP_TRAILING_WHITESPACE
    )

    # Extract major version
    string(REGEX MATCH "^[0-9]+" GCC_MAJOR_VERSION "${GCC_VERSION}")

    # Search for the gcc library directory matching this version
    file(GLOB GCC_LIB_DIRS "/usr/lib/gcc/*/*${GCC_MAJOR_VERSION}.*")

    if(GCC_LIB_DIRS)
        list(GET GCC_LIB_DIRS 0 GCC_LIB_DIR)
        message(STATUS "Found GCC library directory: ${GCC_LIB_DIR}")

        # Look for libgcov.a in the gcc library directory
        find_library(LIBGCOV_LIBRARY
            NAMES gcov
            PATHS ${GCC_LIB_DIR}
            NO_DEFAULT_PATH
        )

        if(LIBGCOV_LIBRARY)
            message(STATUS "Found libgcov: ${LIBGCOV_LIBRARY}")
            # Store this to link against later
            set(GCOV_LINK_LIBRARY ${LIBGCOV_LIBRARY})
        else()
            message(WARNING "Could not find libgcov in ${GCC_LIB_DIR}")
        endif()
    else()
        message(WARNING "Could not find GCC library directory for version ${GCC_VERSION}")
    endif()
endif()

# if windows
if (WIN32)
    # For Windows: Prevent overriding the parent project's compiler/linker settings
    set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)  # cmake-lint: disable=C0103
endif ()

# modify SUNSHINE_DEFINITIONS
if (WIN32)
    list(APPEND
            SUNSHINE_DEFINITIONS SUNSHINE_SHADERS_DIR="${CMAKE_SOURCE_DIR}/src_assets/windows/assets/shaders/directx")
elseif (NOT APPLE)
    list(APPEND SUNSHINE_DEFINITIONS SUNSHINE_SHADERS_DIR="${CMAKE_SOURCE_DIR}/src_assets/linux/assets/shaders/opengl")
endif ()

set(TEST_DEFINITIONS)  # list will be appended as needed

# this indicates we're building tests in case sunshine needs to adjust some code or add private tests
list(APPEND TEST_DEFINITIONS SUNSHINE_TESTS)
list(APPEND TEST_DEFINITIONS SUNSHINE_SOURCE_DIR="${CMAKE_SOURCE_DIR}")
list(APPEND TEST_DEFINITIONS SUNSHINE_TEST_BIN_DIR="${CMAKE_CURRENT_BINARY_DIR}")

if(NOT WIN32)
    find_package(Udev 255)  # we need 255+ for udevadm verify
    message(STATUS "UDEV_FOUND: ${UDEV_FOUND}")
    if(UDEV_FOUND)
        list(APPEND TEST_DEFINITIONS UDEVADM_EXECUTABLE="${UDEVADM_EXECUTABLE}")
    endif()
endif()

file(GLOB_RECURSE TEST_SOURCES CONFIGURE_DEPENDS
        ${CMAKE_SOURCE_DIR}/tests/*.h
        ${CMAKE_SOURCE_DIR}/tests/*.cpp)

set(SUNSHINE_SOURCES
        ${SUNSHINE_TARGET_FILES})

# remove main.cpp from the list of sources
list(REMOVE_ITEM SUNSHINE_SOURCES ${CMAKE_SOURCE_DIR}/src/main.cpp)

add_executable(${PROJECT_NAME}
        ${TEST_SOURCES}
        ${SUNSHINE_SOURCES})

# Copy files needed for config consistency tests to build directory
# This ensures both CLI and CLion can access the same files relative to the test executable
# Using configure_file ensures files are copied when they change between builds
set(INTEGRATION_TEST_FILES
    "src/config.cpp"
    "src_assets/common/assets/web/config.html"
    "docs/configuration.md"
    "src_assets/common/assets/web/public/assets/locale/en.json"
    "src_assets/common/assets/web/configs/tabs/General.vue"
    "src_assets/linux/misc/60-sunshine.rules"
)

foreach(file ${INTEGRATION_TEST_FILES})
    configure_file(
        "${CMAKE_SOURCE_DIR}/${file}"
        "${CMAKE_CURRENT_BINARY_DIR}/${file}"
        COPYONLY
    )
endforeach()

# Copy all locale files for locale consistency tests
# Use a custom command to properly handle both adding and removing files
set(LOCALE_SRC_DIR "${CMAKE_SOURCE_DIR}/src_assets/common/assets/web/public/assets/locale")
set(LOCALE_DST_DIR "${CMAKE_CURRENT_BINARY_DIR}/src_assets/common/assets/web/public/assets/locale")
add_custom_target(sync_locale_files ALL
    COMMAND ${CMAKE_COMMAND} -E rm -rf "${LOCALE_DST_DIR}"
    COMMAND ${CMAKE_COMMAND} -E make_directory "${LOCALE_DST_DIR}"
    COMMAND ${CMAKE_COMMAND} -E copy_directory "${LOCALE_SRC_DIR}" "${LOCALE_DST_DIR}"
    COMMENT "Synchronizing locale files for tests"
    VERBATIM
)

foreach(dep ${SUNSHINE_TARGET_DEPENDENCIES})
    add_dependencies(${PROJECT_NAME} ${dep})  # compile these before sunshine
endforeach()

# Ensure locale files are synchronized before building the test executable
add_dependencies(${PROJECT_NAME} sync_locale_files)

set_target_properties(${PROJECT_NAME} PROPERTIES CXX_STANDARD 23)

# Build the list of libraries to link
set(TEST_LINK_LIBRARIES
    ${SUNSHINE_EXTERNAL_LIBRARIES}
    gtest
    ${PLATFORM_LIBRARIES}
)

# Add the specific libgcov library if found
if(GCOV_LINK_LIBRARY)
    list(APPEND TEST_LINK_LIBRARIES ${GCOV_LINK_LIBRARY})
endif()

target_link_libraries(${PROJECT_NAME} ${TEST_LINK_LIBRARIES})
target_compile_definitions(${PROJECT_NAME} PUBLIC ${SUNSHINE_DEFINITIONS} ${TEST_DEFINITIONS})
target_compile_options(${PROJECT_NAME} PRIVATE $<$<COMPILE_LANGUAGE:CXX>:${SUNSHINE_COMPILE_OPTIONS}>;$<$<COMPILE_LANGUAGE:CUDA>:${SUNSHINE_COMPILE_OPTIONS_CUDA};-std=c++17>)  # cmake-lint: disable=C0301
target_link_options(${PROJECT_NAME} PRIVATE)

if (WIN32)
    # prefer static libraries since we're linking statically
    # this fixes libcurl linking errors when using non MSYS2 version of CMake
    set_target_properties(${PROJECT_NAME} PROPERTIES LINK_SEARCH_START_STATIC 1)
endif ()