"""Tests datu papildināšanas helperiem."""

from __future__ import annotations

import random

from maris_core.data.augment import back_translate, random_synonym_swap


def test_random_synonym_swap_replaces_known_words_without_losing_punctuation() -> None:
    random.seed(7)

    augmented = random_synonym_swap("Fast image, good code!", rate=1.0)

    assert augmented != "Fast image, good code!"
    assert augmented.endswith("!")
    assert "," in augmented


def test_random_synonym_swap_returns_original_for_unknown_words() -> None:
    assert random_synonym_swap("xyz qwerty", rate=1.0) == "xyz qwerty"


def test_back_translate_uses_language_specific_replacements() -> None:
    assert back_translate("Fast help creates a good plan.", lang="en") != (
        "Fast help creates a good plan."
    )


def test_back_translate_falls_back_to_synonym_swap_for_unknown_language() -> None:
    random.seed(3)

    augmented = back_translate("Fast image", lang="de")

    assert augmented != "Fast image"