############################################################################
# Copyright (c) Wolf Vollprecht, Johan Mabille and Sylvain Corlay          #
# Copyright (c) QuantStack                                                 #
#                                                                          #
# Distributed under the terms of the BSD 3-Clause License.                 #
#                                                                          #
# The full license is in the file LICENSE, distributed with this software. #
############################################################################

cmake_minimum_required(VERSION 3.29)

if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
    project(xtensor-python-test)

    find_package(pybind11 REQUIRED)
    set(PYBIND11_INCLUDE_DIR ${pybind11_INCLUDE_DIRS})

    find_package(xtensor REQUIRED CONFIG)
    set(XTENSOR_INCLUDE_DIR ${xtensor_INCLUDE_DIRS})

    find_package(xtensor-python REQUIRED CONFIG)
    set(XTENSOR_PYTHON_INCLUDE_DIR ${xtensor-python_INCLUDE_DIRS})
endif ()

message(STATUS "Forcing tests build type to Release")
set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)

include(CheckCXXCompilerFlag)

string(TOUPPER "${CMAKE_BUILD_TYPE}" U_CMAKE_BUILD_TYPE)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")

if(MSVC)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc /MP /bigobj")
    set(CMAKE_EXE_LINKER_FLAGS /MANIFEST:NO)
endif()

if (DOWNLOAD_GTEST OR GTEST_SRC_DIR)
    if(DOWNLOAD_GTEST)
        # Download and unpack googletest at configure time
        configure_file(downloadGTest.cmake.in googletest-download/CMakeLists.txt)
    else()
        # Copy local source of googletest at configure time
        configure_file(copyGTest.cmake.in googletest-download/CMakeLists.txt)
    endif()
    execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
                    RESULT_VARIABLE result
                    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
    if(result)
        message(FATAL_ERROR "CMake step for googletest failed: ${result}")
    endif()
    execute_process(COMMAND ${CMAKE_COMMAND} --build .
                    RESULT_VARIABLE result
                    WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
    if(result)
        message(FATAL_ERROR "Build step for googletest failed: ${result}")
    endif()

    set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)

    # Add googletest directly to our build. This defines
    # the gtest and gtest_main targets.
    add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googletest-src
                     ${CMAKE_CURRENT_BINARY_DIR}/googletest-build EXCLUDE_FROM_ALL)

    set(GTEST_INCLUDE_DIRS "${gtest_SOURCE_DIR}/include")
    set(GTEST_BOTH_LIBRARIES gtest_main gtest)
else()
    find_package(GTest REQUIRED)
endif()

find_package(Threads)

include_directories(${GTEST_INCLUDE_DIRS})

set(XTENSOR_PYTHON_TESTS
    main.cpp
    test_pyarray.cpp
    test_pyarray_traits.cpp
    test_pytensor.cpp
    test_pyvectorize.cpp
    test_sfinae.cpp
)

add_executable(test_xtensor_python ${XTENSOR_PYTHON_TESTS} ${XTENSOR_PYTHON_HEADERS})
target_link_libraries(test_xtensor_python xtensor-python ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT} ${PYTHON_LIBRARIES})

if(DOWNLOAD_GTEST OR GTEST_SRC_DIR)
    add_dependencies(test_xtensor_python gtest_main)
endif()

add_custom_target(xtest COMMAND ./test_xtensor_python DEPENDS test_xtensor_python)