import os
import re

import pytest

import yatest.common as yc


def clean_traceback(traceback):
    traceback = re.sub(rb"\033\[(\d|;)+?m", b"", traceback)  # strip ANSI codes
    traceback = re.sub(rb" at 0x[0-9a-fA-F]+", b"", traceback)  # remove object ids
    return traceback


@pytest.mark.parametrize(
    "mode",
    [
        "default",
        "ultratb_color",
        "ultratb_verbose",
    ],
)
@pytest.mark.parametrize(
    "entry_point",
    [
        "main",
        "custom",
    ],
)
def test_traceback(mode, entry_point):
    tb_tool = yc.build_path("library/python/runtime_py3/test/traceback/traceback")
    stdout_path = yc.test_output_path("stdout_raw.txt")
    stderr_path = yc.test_output_path("stderr_raw.txt")
    filtered_stdout_path = yc.test_output_path("stdout.txt")
    filtered_stderr_path = yc.test_output_path("stderr.txt")

    env = os.environ.copy()
    env.pop("PYTHONPATH", None)  # Do not let program peek into its sources on filesystem
    if entry_point == "custom":
        env["Y_PYTHON_ENTRY_POINT"] = "library.python.runtime_py3.test.traceback.crash:main"

    proc = yc.execute(
        command=[tb_tool, mode],
        env=env,
        stdout=stdout_path,
        stderr=stderr_path,
        check_exit_code=False,
    )

    with open(filtered_stdout_path, "wb") as f:
        f.write(clean_traceback(proc.std_out))

    with open(filtered_stderr_path, "wb") as f:
        f.write(clean_traceback(proc.std_err))

    return {
        "stdout": yc.canonical_file(
            filtered_stdout_path,
            local=True,
        ),
        "stderr": yc.canonical_file(
            filtered_stderr_path,
            local=True,
        ),
    }