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import os
import subprocess
from datetime import datetime, timezone
import numpy as np
from mic_clipper.storage import ClipWriter
def test_writer_creates_private_opus_clip_in_segment_start_date(tmp_path):
started_at = datetime(2026, 9, 29, 23, 59, 59, tzinfo=timezone.utc)
samples = np.sin(np.linspace(0, 100, 16_000, dtype=np.float32))
writer = ClipWriter(tmp_path)
clip = writer.open(started_at)
clip.write(samples)
clip.close()
destination = tmp_path / "2026-09-29"
files = list(destination.glob("*.opus"))
assert len(files) == 1
assert files[0].name.startswith("23-59-59")
assert os.stat(destination).st_mode & 0o777 == 0o700
assert os.stat(files[0]).st_mode & 0o777 == 0o600
assert files[0].read_bytes()[:4] == b"OggS"
assert b"OpusHead" in files[0].read_bytes()[:128]
decoded = subprocess.run(
["ffmpeg", "-v", "error", "-i", str(files[0]), "-f", "f32le", "pipe:1"],
check=True,
capture_output=True,
)
assert len(decoded.stdout) > 0
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