from pathlib import Path
import sys

import numpy as np
import pytest
import soundfile as sf

# Support running the suite before the project is installed.
sys.path.insert(0, str(Path(__file__).resolve().parents[1] / "src"))

from producer.config import resolve
from producer.setup import ensure_ffmpeg


@pytest.fixture(autouse=True)
def producer_root(tmp_path, monkeypatch):
    """Isolated shared logs directory for every test: report logs always go
    under <PRODUCER_ROOT>/logs."""
    root = tmp_path / "producer-root"
    monkeypatch.setenv("PRODUCER_ROOT", str(root))
    return root


@pytest.fixture
def logs(producer_root):
    return producer_root / "logs"


@pytest.fixture
def report_of(logs):
    """Locate the one published report for an audio destination; report names
    are timestamped, so tests glob by stem."""
    def find(target):
        matches = sorted(logs.glob(f"{target.stem}.*.report.json"))
        assert len(matches) == 1, matches
        return matches[0]
    return find


@pytest.fixture
def progress():
    return lambda *_: None


@pytest.fixture
def wav(tmp_path):
    def write(samples=None, *, rate=48000, name="input.wav"):
        if samples is None:
            time = np.arange(rate * 3) / rate
            samples = 0.15 * np.sin(2 * np.pi * 440 * time)
        path = tmp_path / name
        sf.write(path, np.asarray(samples), rate, format="WAV", subtype="FLOAT")
        return path

    return write


@pytest.fixture
def bypass():
    return resolve(profile="cleanup-only", overrides={"denoiser": "none", "highpass": False})


@pytest.fixture
def ffmpeg():
    try:
        return ensure_ffmpeg()
    except RuntimeError as error:
        pytest.skip(str(error))