from providers.chatgpt.registration import (
    build_authorize_url,
    extract_verification_code,
    generate_birthdate_90s,
    generate_name,
)


def test_generate_name_shape():
    name = generate_name()
    parts = name.split(" ")
    assert len(parts) == 2
    assert all(p.isalpha() for p in parts)


def test_generate_birthdate_90s_range():
    month, day, year = generate_birthdate_90s()
    assert 1 <= int(month) <= 12
    assert 1 <= int(day) <= 28
    assert 1990 <= int(year) <= 1999


def test_extract_verification_code_prefers_chatgpt_phrase():
    text = "foo 123456 bar Your ChatGPT code is 654321"
    assert extract_verification_code(text) == "654321"


def test_extract_verification_code_fallback_last_code():
    text = "codes 111111 and 222222"
    assert extract_verification_code(text) == "222222"


def test_build_authorize_url_contains_required_params():
    url = build_authorize_url("challenge", "state123")
    assert "response_type=code" in url
    assert "code_challenge=challenge" in url
    assert "state=state123" in url