from proteus.game.agents.parsing import extract_action

VALID = ["up", "down", "left", "right", "stay"]


def test_extracts_action_field_last_occurrence_wins():
    text = "ACTION: left\n...changed my mind...\nACTION: up"
    assert extract_action(text, VALID) == "up"


def test_case_insensitive_and_strips_punctuation():
    assert extract_action("Action: Up.", VALID) == "up"


def test_bare_word_fallback_when_no_action_field():
    assert extract_action("I will move down to escape.", VALID) == "down"


def test_returns_none_when_no_valid_action():
    assert extract_action("no idea", VALID) is None


def test_action_field_with_trailing_question_mark():
    # LLMs often append "?"; the field token must still be extracted, not
    # fall through to a later prose word.
    assert extract_action("ACTION: up?\nThen move right", VALID) == "up"