"""Tests for transient Edge TTS retry behavior."""

from __future__ import annotations

import asyncio

from src.engines import Engine
from src.translation import TranslationConfig


def test_synthesize_retries_transient_edge_tts_failure(tmp_path, monkeypatch):
    calls = {"count": 0}

    class FakeCommunicate:
        def __init__(self, text, voice, rate):
            self.text = text
            self.voice = voice
            self.rate = rate

        async def save(self, out_path):
            calls["count"] += 1
            if calls["count"] == 1:
                raise RuntimeError("transient 503")
            with open(out_path, "wb") as audio_file:
                audio_file.write(b"0" * 2048)

    async def no_sleep(_seconds):
        return None

    monkeypatch.setattr("src.engines.edge_tts.Communicate", FakeCommunicate)
    monkeypatch.setattr("src.engines.asyncio.sleep", no_sleep)
    monkeypatch.setattr("src.engines.DEFAULT_TTS_MAX_RETRIES", 2)

    engine = Engine(
        "cpu",
        translation_config=TranslationConfig(
            base_url="http://127.0.0.1:1234/v1",
            api_key="test-key",
            model="test-model",
        ),
    )
    out_path = tmp_path / "tts.mp3"

    asyncio.run(engine.synthesize("Bonjour", "fr", out_path))

    assert calls["count"] == 2
    assert out_path.exists()
    assert out_path.stat().st_size == 2048