import unittest
import os
from dotenv import load_dotenv

import nlpaug.augmenter.audio as naa
from nlpaug.util import AudioLoader


class TestAudio(unittest.TestCase):
    @classmethod
    def setUpClass(cls):
        env_config_path = os.path.abspath(
            os.path.join(os.path.dirname(__file__), "..", "..", "..", ".env")
        )
        load_dotenv(env_config_path)
        # https://freewavesamples.com/yamaha-v50-rock-beat-120-bpm
        cls.sample_wav_file = os.path.join(
            os.environ.get("TEST_DIR"),
            "res",
            "audio",
            "Yamaha-V50-Rock-Beat-120bpm.wav",
        )

        cls.audio, cls.sampling_rate = AudioLoader.load_audio(cls.sample_wav_file)

    def test_multi_thread(self):
        n = 3
        augs = [
            naa.CropAug(sampling_rate=self.sampling_rate),
            naa.PitchAug(sampling_rate=self.sampling_rate),
        ]

        for num_thread in [1, 3]:
            for aug in augs:
                augmented_data = aug.augment(self.audio, n=n, num_thread=num_thread)
                self.assertEqual(len(augmented_data), n)

    def test_coverage_and_zone(self):
        params = [((0.3, 0.7), 1), ((0, 1), 1)]

        for zone, coverage in params:
            augs = [
                naa.LoudnessAug(zone=zone, coverage=coverage, stateless=False),
                naa.MaskAug(zone=zone, coverage=coverage, stateless=False),
                naa.NoiseAug(zone=zone, coverage=coverage, stateless=False),
                naa.PitchAug(
                    zone=zone,
                    coverage=coverage,
                    stateless=False,
                    sampling_rate=self.sampling_rate,
                ),
                naa.SpeedAug(zone=zone, coverage=coverage, stateless=False),
                naa.VtlpAug(
                    zone=zone,
                    coverage=coverage,
                    stateless=False,
                    sampling_rate=self.sampling_rate,
                ),
            ]

            for aug in augs:
                aug_data = aug.augment(self.audio)
                self.assertTrue(
                    len(aug_data[aug.start_pos : aug.end_pos]),
                    int(len(self.audio) * (zone[1] - zone[0]) * coverage),
                )
