# ============================================
# Projet   : API-KA
# Fichier  : tests/test_retry.py
# Node     : m3u96b
# Author   : Simon-Pierre Boucher
# Contact  : contact@spboucher.ai
# Date     : 2026-08-16
# ============================================
"""Tests de la logique de retry avec backoff (src/utils/retry.py)."""

from __future__ import annotations

import pytest

from src.utils.retry import retry, retry_call


def test_retry_call_succeeds_first_try() -> None:
    """Aucune relance si le premier essai réussit."""
    calls = {"count": 0}

    def ok() -> str:
        calls["count"] += 1
        return "ok"

    assert retry_call(ok, attempts=3, delays=(0, 0, 0)) == "ok"
    assert calls["count"] == 1


def test_retry_call_recovers_after_failures() -> None:
    """Les échecs transitoires sont relancés jusqu'au succès."""
    calls = {"count": 0}
    retries: list[int] = []

    def flaky() -> str:
        calls["count"] += 1
        if calls["count"] < 3:
            raise RuntimeError("transitoire")
        return "ok"

    result = retry_call(
        flaky,
        attempts=3,
        delays=(0, 0, 0),
        on_retry=lambda attempt, exc, delay: retries.append(attempt),
    )
    assert result == "ok"
    assert calls["count"] == 3
    assert retries == [1, 2]


def test_retry_call_raises_after_exhaustion() -> None:
    """Après épuisement des tentatives, la dernière exception est propagée."""
    calls = {"count": 0}

    def always_fails() -> None:
        calls["count"] += 1
        raise ValueError("permanent")

    with pytest.raises(ValueError, match="permanent"):
        retry_call(always_fails, attempts=3, delays=(0, 0, 0))
    assert calls["count"] == 4  # essai initial + 3 relances


def test_retry_decorator() -> None:
    """Le décorateur applique la même logique que retry_call."""
    calls = {"count": 0}

    @retry(attempts=2, delays=(0, 0))
    def flaky(value: int) -> int:
        calls["count"] += 1
        if calls["count"] == 1:
            raise RuntimeError("transitoire")
        return value * 2

    assert flaky(21) == 42
    assert calls["count"] == 2