import io
import itertools
import platform
import unittest
if platform.system() == "Windows":
    import warnings
    warnings.warn("sox io not support in Windows, please skip test.")
    exit()

from parameterized import parameterized
from paddleaudio.backends import sox_io_backend
from common_utils import (get_wav_data, TempDirMixin, name_func)


class SmokeTest(TempDirMixin, unittest.TestCase):
    """Run smoke test on various audio format

    The purpose of this test suite is to verify that sox_io_backend functionalities do not exhibit
    abnormal behaviors.

    This test suite should be able to run without any additional tools (such as sox command),
    however without such tools, the correctness of each function cannot be verified.
    """

    def run_smoke_test(self,
                       ext,
                       sample_rate,
                       num_channels,
                       *,
                       compression=None,
                       dtype="float32"):
        duration = 1
        num_frames = sample_rate * duration
        #path = self.get_temp_path(f"test.{ext}")
        path = self.get_temp_path(f"test.{ext}")
        original = get_wav_data(
            dtype, num_channels, normalize=False, num_frames=num_frames)

        # 1. run save
        sox_io_backend.save(
            path, original, sample_rate, compression=compression)
        # 2. run info
        info = sox_io_backend.info(path)
        assert info.sample_rate == sample_rate
        assert info.num_channels == num_channels
        # 3. run load
        loaded, sr = sox_io_backend.load(path, normalize=False)
        assert sr == sample_rate
        assert loaded.shape[0] == num_channels

    @parameterized.expand(
        list(
            itertools.product(
                ["float32", "int32"],
                #["float32", "int32", "int16", "uint8"],
                [8000, 16000],
                [1, 2], )),
        name_func=name_func, )
    def test_wav(self, dtype, sample_rate, num_channels):
        """Run smoke test on wav format"""
        self.run_smoke_test("wav", sample_rate, num_channels, dtype=dtype)

    #@parameterized.expand(
    #list(
    #itertools.product(
    #[8000, 16000],
    #[1, 2],
    #[-4.2, -0.2, 0, 0.2, 96, 128, 160, 192, 224, 256, 320],
    #)
    #)
    #)
    #def test_mp3(self, sample_rate, num_channels, bit_rate):
    #"""Run smoke test on mp3 format"""
    #self.run_smoke_test("mp3", sample_rate, num_channels, compression=bit_rate)

    #@parameterized.expand(
    #list(
    #itertools.product(
    #[8000, 16000],
    #[1, 2],
    #[-1, 0, 1, 2, 3, 3.6, 5, 10],
    #)
    #)
    #)
    #def test_vorbis(self, sample_rate, num_channels, quality_level):
    #"""Run smoke test on vorbis format"""
    #self.run_smoke_test("vorbis", sample_rate, num_channels, compression=quality_level)

    @parameterized.expand(
        list(itertools.product(
            [8000, 16000],
            [1, 2],
            list(range(9)), )),
        name_func=name_func, )
    def test_flac(self, sample_rate, num_channels, compression_level):
        """Run smoke test on flac format"""
        self.run_smoke_test(
            "flac", sample_rate, num_channels, compression=compression_level)


class SmokeTestFileObj(unittest.TestCase):
    """Run smoke test on various audio format

    The purpose of this test suite is to verify that sox_io_backend functionalities do not exhibit
    abnormal behaviors.

    This test suite should be able to run without any additional tools (such as sox command),
    however without such tools, the correctness of each function cannot be verified.
    """

    def run_smoke_test(self,
                       ext,
                       sample_rate,
                       num_channels,
                       *,
                       compression=None,
                       dtype="float32"):
        duration = 1
        num_frames = sample_rate * duration
        original = get_wav_data(
            dtype, num_channels, normalize=False, num_frames=num_frames)

        fileobj = io.BytesIO()
        # 1. run save
        sox_io_backend.save(
            fileobj, original, sample_rate, compression=compression, format=ext)
        # 2. run info
        fileobj.seek(0)
        info = sox_io_backend.info(fileobj, format=ext)
        assert info.sample_rate == sample_rate
        assert info.num_channels == num_channels
        # 3. run load
        fileobj.seek(0)
        loaded, sr = sox_io_backend.load(fileobj, normalize=False, format=ext)
        assert sr == sample_rate
        assert loaded.shape[0] == num_channels

    @parameterized.expand(
        list(itertools.product(
            ["float32", "int32"],
            [8000, 16000],
            [1, 2], )),
        name_func=name_func, )
    def test_wav(self, dtype, sample_rate, num_channels):
        """Run smoke test on wav format"""
        self.run_smoke_test("wav", sample_rate, num_channels, dtype=dtype)

    # not support yet
    #@parameterized.expand(
    #list(
    #itertools.product(
    #[8000, 16000],
    #[1, 2],
    #[-4.2, -0.2, 0, 0.2, 96, 128, 160, 192, 224, 256, 320],
    #)
    #)
    #)
    #def test_mp3(self, sample_rate, num_channels, bit_rate):
    #"""Run smoke test on mp3 format"""
    #self.run_smoke_test("mp3", sample_rate, num_channels, compression=bit_rate)

    #@parameterized.expand(
    #list(
    #itertools.product(
    #[8000, 16000],
    #[1, 2],
    #[-1, 0, 1, 2, 3, 3.6, 5, 10],
    #)
    #)
    #)
    #def test_vorbis(self, sample_rate, num_channels, quality_level):
    #"""Run smoke test on vorbis format"""
    #self.run_smoke_test("vorbis", sample_rate, num_channels, compression=quality_level)

    @parameterized.expand(
        list(itertools.product(
            [8000, 16000],
            [1, 2],
            list(range(9)), )),
        name_func=name_func, )
    def test_flac(self, sample_rate, num_channels, compression_level):
        #"""Run smoke test on flac format"""
        self.run_smoke_test(
            "flac", sample_rate, num_channels, compression=compression_level)


if __name__ == '__main__':
    #test_func()
    unittest.main()