from __future__ import annotations

import pytest

from app.aliases import ProductAliasIndex
from app.normalization import normalize_text
from app.typo import damerau_levenshtein_distance, word_similarity


@pytest.mark.parametrize(
    ("source", "expected"),
    [
        ("Шуруповёрт", "шуруповерт"),
        ("3,5 × 25", "3.5x25"),
        ("4.2 х 75", "4.2x75"),
        ("М10", "m10"),
        ("Р120", "p120"),
    ],
)
def test_basic_canonicalization(source: str, expected: str) -> None:
    assert normalize_text(source) == expected


def test_cyrillic_x_is_not_replaced_inside_words() -> None:
    assert normalize_text("хомут находится") == "хомут находится"


def test_damerau_counts_adjacent_transposition_as_one_edit() -> None:
    assert damerau_levenshtein_distance("шуруповерт", "шурпуоверт") == 1


def test_heavily_damaged_product_word_still_has_useful_score() -> None:
    assert word_similarity("шураывваверт", "шуруповерт") > 0.53


@pytest.mark.parametrize(
    ("query", "canonical"),
    [
        ("болгарка на 230", "ушм"),
        ("шурик на 12в", "шуруповерт"),
        ("пластиковые хомуты 4.8х400", "стяжка"),
        ("шурпуоверт", "шуруповерт"),
        ("шураыввавёрт", "шуруповерт"),
    ],
)
def test_alias_and_typo_detection(query: str, canonical: str) -> None:
    match = ProductAliasIndex().detect(query)
    assert match is not None
    assert match.canonical == canonical