############################################################################
# Copyright (c) 2016, Sylvain Corlay, Johan Mabille, Martin Renou          #
# Copyright (c) 2016, QuantStack                                           #
#                                                                          #
# Distributed under the terms of the BSD 3-Clause License.                 #
#                                                                          #
# The full license is in the file LICENSE, distributed with this software. #
############################################################################

# Unit tests
# ==========
if(NOT XEUS_EMSCRIPTEN_WASM_BUILD)
    cmake_minimum_required(VERSION 3.1)

    if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
        project(xeus-test)

        enable_testing()

        find_package(xeus REQUIRED CONFIG)
        find_package(nlohmann_json QUIET CONFIG)

        set(XEUS_TEST_DIR ${CMAKE_CURRENT_LIST_DIR})
    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)

    if(nlohmann_json_FOUND)
      add_definitions(-DHAVE_NLOHMANN_JSON)
    endif()

    if(CMAKE_CXX_COMPILER_ID MATCHES Clang OR CMAKE_CXX_COMPILER_ID MATCHES GNU OR CMAKE_CXX_COMPILER_ID MATCHES Intel)
        add_compile_options(-Wunused-parameter -Wextra -Wreorder -Wconversion -Wsign-conversion)

        CHECK_CXX_COMPILER_FLAG(-march=native HAS_MARCH_NATIVE)
        if (HAS_MARCH_NATIVE)
            add_compile_options(-march=native)
        endif()
    endif()

    if(CMAKE_CXX_COMPILER_ID MATCHES MSVC)
        add_compile_options(/EHsc /MP /bigobj)
        set(CMAKE_EXE_LINKER_FLAGS /MANIFEST:NO)
    endif()


    find_package(doctest REQUIRED)


    find_package(Threads)

    find_program(PYTEST  
        NAMES pytest-3 pytest py.test-3 py.test REQUIRED)


    set(XEUS_TESTS
        test_xin_memory_history_manager.cpp
        test_unit_kernel.cpp
    )

    if(nlohmann_json_FOUND)
        # Version up to 3.1.2 export the target `nlohmann_json`
        if(TARGET nlohmann_json)
          set(nlohmann_json_TARGET nlohmann_json)
        # Newer versions export the namespaced target `nlohmann_json::nlohmann_json`
        elseif(TARGET nlohmann_json::nlohmann_json)
          set(nlohmann_json_TARGET nlohmann_json::nlohmann_json)
        endif()
    endif()

    if (TARGET xeus)
        set(xeus_TARGET xeus)
        message("Found xeus shared library.")
    elseif (TARGET xeus-static)
        set(xeus_TARGET xeus-static)
        message("Found xeus static library.")
    endif ()

    foreach(filename IN LISTS XEUS_TESTS)
        get_filename_component(targetname ${filename} NAME_WE)

        add_executable(${targetname} test_main.cpp ${filename} test_interpreter.cpp)
        target_link_libraries(${targetname} PRIVATE ${xeus_TARGET} doctest::doctest Threads::Threads ${nlohmann_json_TARGET})
        add_test(NAME ${targetname} COMMAND ${targetname})
    endforeach()


    # Test_kernel tests
    # =================

    set(TEST_KERNEL_SOURCES
        test_interpreter.cpp
        test_interpreter.hpp
        main.cpp)

    configure_file(
        "${XEUS_TEST_DIR}/test_kernel/kernel.json.in"
        "kernels/test_kernel/kernel.json"
    )

    add_executable(test_kernel ${TEST_KERNEL_SOURCES})
    target_link_libraries(test_kernel PRIVATE ${xeus_TARGET} Threads::Threads)
    target_compile_features(test_kernel PRIVATE cxx_std_11)

    set(CONNECTION_FILE ${CMAKE_CURRENT_SOURCE_DIR}/connection.json)

    configure_file(
        "${XEUS_TEST_DIR}/test_kernel.py"
        "${CMAKE_CURRENT_BINARY_DIR}/"
        COPYONLY)

    add_test(NAME test_kernel
        COMMAND ${PYTEST} test_kernel.py)
    set_tests_properties(test_kernel
        PROPERTIES
        ENVIRONMENT "JUPYTER_PATH=${CMAKE_CURRENT_BINARY_DIR}")

    # Test_kernel_control tests
    # =========================

    set(TEST_KERNEL_SPLIT_SOURCES
        test_interpreter.cpp
        test_interpreter.hpp
        main_control.cpp)

    configure_file(
        "${XEUS_TEST_DIR}/test_kernel_control/kernel.json.in"
        "kernels/test_kernel_control/kernel.json"
    )

    add_executable(test_kernel_control ${TEST_KERNEL_SPLIT_SOURCES})
    target_link_libraries(test_kernel_control PRIVATE ${xeus_TARGET} Threads::Threads)
    target_compile_features(test_kernel_control PRIVATE cxx_std_11)

    set(CONNECTION_FILE ${CMAKE_CURRENT_SOURCE_DIR}/connection.json)

    configure_file(
        "${XEUS_TEST_DIR}/test_kernel_control.py"
        "${CMAKE_CURRENT_BINARY_DIR}/"
        COPYONLY)

    add_test(NAME test_kernel_control
        COMMAND ${PYTEST} test_kernel_control.py)
    set_tests_properties(test_kernel_control
        PROPERTIES
        ENVIRONMENT "JUPYTER_PATH=${CMAKE_CURRENT_BINARY_DIR}")

    # Test_kernel_shell tests
    # =======================

    set(TEST_KERNEL_SPLIT_SOURCES
        test_interpreter.cpp
        test_interpreter.hpp
        main_shell.cpp)

    configure_file(
        "${XEUS_TEST_DIR}/test_kernel_shell/kernel.json.in"
        "kernels/test_kernel_shell/kernel.json"
    )

    add_executable(test_kernel_shell ${TEST_KERNEL_SPLIT_SOURCES})
    target_link_libraries(test_kernel_shell PRIVATE ${xeus_TARGET} Threads::Threads)
    target_compile_features(test_kernel_shell PRIVATE cxx_std_11)

    set(CONNECTION_FILE ${CMAKE_CURRENT_SOURCE_DIR}/connection.json)

    configure_file(
        "${XEUS_TEST_DIR}/test_kernel_shell.py"
        "${CMAKE_CURRENT_BINARY_DIR}/"
        COPYONLY)

    add_test(NAME test_kernel_shell
        COMMAND ${PYTEST} test_kernel_shell.py)
    set_tests_properties(test_kernel_shell
        PROPERTIES
        ENVIRONMENT "JUPYTER_PATH=${CMAKE_CURRENT_BINARY_DIR}")
else()
    add_executable(emscripten_wasm_test main_emscripten_wasm.cpp test_interpreter.cpp)
    target_link_libraries(emscripten_wasm_test PRIVATE xeus-static)
endif()
