import re
import warnings
from pathlib import Path

import pytest

from logwatcher.classifier import N2_PATTERNS
from logwatcher.config import FIXTURE_PATH

ORIGINAL_LOGS_DIR = FIXTURE_PATH / "original_logs"


def _pattern_name_to_filename(name: str) -> str:
    """STORE_CODE_NOT_FOUND → CR_store_code_not_found.txt"""
    return f"CR_{name.lower()}.txt"

def _read_fixture(path: Path) -> str:
    """Lit un fichier de fixture avec fallback Windows-1252."""
    try:
        return path.read_text(encoding="utf-8")
    except UnicodeDecodeError:
        return path.read_text(encoding="windows-1252")

@pytest.mark.parametrize("name, pattern", N2_PATTERNS.items())
def test_pattern_matches_fixture(name, pattern):
    """Chaque pattern N2 matche au moins une ligne de son fichier de fixture."""

    fixture = ORIGINAL_LOGS_DIR / _pattern_name_to_filename(name)
    if not fixture.exists():
        msg = f"No fixture named '{fixture}'"
        warnings.warn(msg)
        pytest.skip(msg)

    lignes = [
        l for l in _read_fixture(fixture).splitlines()
        if l.strip()
    ]

    assert lignes, f"empty fixture file : {fixture}"

    match_count = 0

    for ligne in lignes:
        match = re.search(pattern, ligne)
        if match:
            match_count += 1

    assert match_count > 0, (
        f"{name} : no match in file {fixture.name}\n"
        f"pattern: {pattern}"
    )