#! /usr/bin/env python

from nose2 import main
from nose2.tools import params
from numpy.testing import TestCase, assert_equal
from aubio import source
from .utils import list_all_sounds
import numpy as np

import warnings
warnings.filterwarnings('ignore', category=UserWarning, append=True)

list_of_sounds = list_all_sounds('sounds')
samplerates = [0, 44100, 8000, 32000]
hop_sizes = [512, 1024, 64]

path = None

all_params = []
for soundfile in list_of_sounds:
    for hop_size in hop_sizes:
        for samplerate in samplerates:
            all_params.append((hop_size, samplerate, soundfile))


class aubio_source_test_case_base(TestCase):

    def setUp(self):
        if not len(list_of_sounds):
            self.skipTest('add some sound files in \'python/tests/sounds\'')
        self.default_test_sound = list_of_sounds[0]

class aubio_source_test_case(aubio_source_test_case_base):

    @params(*list_of_sounds)
    def test_close_file(self, filename):
        samplerate = 0 # use native samplerate
        hop_size = 256
        f = source(filename, samplerate, hop_size)
        f.close()

    @params(*list_of_sounds)
    def test_close_file_twice(self, filename):
        samplerate = 0 # use native samplerate
        hop_size = 256
        f = source(filename, samplerate, hop_size)
        f.close()
        f.close()

class aubio_source_read_test_case(aubio_source_test_case_base):

    def read_from_source(self, f):
        total_frames = 0
        while True:
            samples , read = f()
            total_frames += read
            if read < f.hop_size:
                assert_equal(samples[read:], 0)
                break
        #result_str = "read {:.2f}s ({:d} frames in {:d} blocks at {:d}Hz) from {:s}"
        #result_params = total_frames / float(f.samplerate), total_frames, total_frames//f.hop_size, f.samplerate, f.uri
        #print (result_str.format(*result_params))
        return total_frames

    @params(*all_params)
    def test_samplerate_hopsize(self, hop_size, samplerate, soundfile):
        try:
            f = source(soundfile, samplerate, hop_size)
        except RuntimeError as e:
            self.skipTest('failed opening with hop_s = {:d}, samplerate = {:d} ({:s})'.format(hop_size, samplerate, str(e)))
        assert f.samplerate != 0
        read_frames = self.read_from_source(f)
        if 'f_' in soundfile and samplerate == 0:
            import re
            f = re.compile('.*_\([0:9]*f\)_.*')
            match_f = re.findall('([0-9]*)f_', soundfile)
            if len(match_f) == 1:
                expected_frames = int(match_f[0])
                self.assertEqual(expected_frames, read_frames)

    @params(*list_of_sounds)
    def test_samplerate_none(self, p):
        f = source(p)
        assert f.samplerate != 0
        self.read_from_source(f)

    @params(*list_of_sounds)
    def test_samplerate_0(self, p):
        f = source(p, 0)
        assert f.samplerate != 0
        self.read_from_source(f)

    @params(*list_of_sounds)
    def test_zero_hop_size(self, p):
        f = source(p, 0, 0)
        assert f.samplerate != 0
        assert f.hop_size != 0
        self.read_from_source(f)

    @params(*list_of_sounds)
    def test_seek_to_half(self, p):
        from random import randint
        f = source(p, 0, 0)
        assert f.samplerate != 0
        assert f.hop_size != 0
        a = self.read_from_source(f)
        c = randint(0, a)
        f.seek(c)
        b = self.read_from_source(f)
        assert a == b + c

    @params(*list_of_sounds)
    def test_duration(self, p):
        total_frames = 0
        f = source(p)
        duration = f.duration
        while True:
            _, read = f()
            total_frames += read
            if read < f.hop_size: break
        self.assertEqual(duration, total_frames)


class aubio_source_test_wrong_params(TestCase):

    def test_wrong_file(self):
        with self.assertRaises(RuntimeError):
            source('path_to/unexisting file.mp3')

class aubio_source_test_wrong_params_with_file(aubio_source_test_case_base):

    def test_wrong_samplerate(self):
        with self.assertRaises(ValueError):
            source(self.default_test_sound, -1)

    def test_wrong_hop_size(self):
        with self.assertRaises(ValueError):
            source(self.default_test_sound, 0, -1)

    def test_wrong_channels(self):
        with self.assertRaises(ValueError):
            source(self.default_test_sound, 0, 0, -1)

    def test_wrong_seek(self):
        f = source(self.default_test_sound)
        with self.assertRaises(ValueError):
            f.seek(-1)

    def test_wrong_seek_too_large(self):
        f = source(self.default_test_sound)
        try:
            with self.assertRaises(ValueError):
                f.seek(f.duration + f.samplerate * 10)
        except AssertionError:
            self.skipTest('seeking after end of stream failed raising ValueError')

class aubio_source_readmulti_test_case(aubio_source_read_test_case):

    def read_from_source(self, f):
        total_frames = 0
        while True:
            samples, read = f.do_multi()
            total_frames += read
            if read < f.hop_size:
                assert_equal(samples[:,read:], 0)
                break
        #result_str = "read {:.2f}s ({:d} frames in {:d} channels and {:d} blocks at {:d}Hz) from {:s}"
        #result_params = total_frames / float(f.samplerate), total_frames, f.channels, int(total_frames/f.hop_size), f.samplerate, f.uri
        #print (result_str.format(*result_params))
        return total_frames

if __name__ == '__main__':
    main()