from datetime import datetime, timedelta
import os
import subprocess

from config import Config


def generate_test_file(fn, delta):
    subprocess.call([
        'ffmpeg',
        '-f', 'lavfi',
        '-i', 'sine=frequency=1000:duration=%d' % delta.total_seconds(),
        '-b:a', '%dk' % 128,
        fn
    ])


start = datetime.now().replace(minute=0, second=0) - timedelta(hours=3)
end = start + timedelta(hours=6)
delta = timedelta(hours=1)

t = start
while t < end:
    fn = os.path.join(Config.data_dir, 'qfhi-{:04d}{:02d}{:02d}-{:02d}{:02d}.mp3'.format(
            t.year, t.month, t.day, t.hour, t.minute))
    print(fn)
    generate_test_file(fn, delta)

    t += delta