"""Shared pytest fixtures for audio-fingerprint tests."""

from __future__ import annotations

import sys
import tempfile
from pathlib import Path

import numpy as np
import pytest
import soundfile as sf

# Ensure the package source is importable as `src.*` when pytest is invoked
# from the package directory without an installed wheel.
_PKG_DIR = Path(__file__).resolve().parents[1]
if str(_PKG_DIR) not in sys.path:
    sys.path.insert(0, str(_PKG_DIR))


@pytest.fixture
def sample_audio() -> tuple[np.ndarray, int]:
    """Generate a 2-second 440 Hz sine for tests."""
    sample_rate = 22050
    duration = 2.0
    t = np.linspace(0, duration, int(sample_rate * duration))
    audio = 0.5 * np.sin(2 * np.pi * 440.0 * t)
    return audio.astype(np.float32), sample_rate


@pytest.fixture
def audio_file(sample_audio: tuple[np.ndarray, int]) -> Path:
    """Persist the sample audio to a temp WAV path."""
    audio, sample_rate = sample_audio
    with tempfile.NamedTemporaryFile(suffix=".wav", delete=False) as tmp:
        sf.write(tmp.name, audio, sample_rate)
        return Path(tmp.name)