import os

from mutagen.dsdiff import DSDIFF, IffError

from tests import TestCase, DATA_DIR, get_temp_copy


class TDSDIFF(TestCase):
    silence_1 = os.path.join(DATA_DIR, '2822400-1ch-0s-silence.dff')
    silence_2 = os.path.join(DATA_DIR, '5644800-2ch-s01-silence.dff')
    silence_dst = os.path.join(DATA_DIR, '5644800-2ch-s01-silence-dst.dff')

    def setUp(self):
        self.dff_1 = DSDIFF(self.silence_1)
        self.dff_2 = DSDIFF(self.silence_2)
        self.dff_dst = DSDIFF(self.silence_dst)

        self.dff_id3 = DSDIFF(get_temp_copy(self.silence_dst))
        self.dff_no_id3 = DSDIFF(get_temp_copy(self.silence_2))

    def test_channels(self):
        self.failUnlessEqual(self.dff_1.info.channels, 1)
        self.failUnlessEqual(self.dff_2.info.channels, 2)
        self.failUnlessEqual(self.dff_dst.info.channels, 2)

    def test_length(self):
        self.failUnlessEqual(self.dff_1.info.length, 0)
        self.failUnlessEqual(self.dff_2.info.length, 0.01)
        self.failUnlessEqual(self.dff_dst.info.length, 0)

    def test_sampling_frequency(self):
        self.failUnlessEqual(self.dff_1.info.sample_rate, 2822400)
        self.failUnlessEqual(self.dff_2.info.sample_rate, 5644800)
        self.failUnlessEqual(self.dff_dst.info.sample_rate, 5644800)

    def test_bits_per_sample(self):
        self.failUnlessEqual(self.dff_1.info.bits_per_sample, 1)

    def test_bitrate(self):
        self.failUnlessEqual(self.dff_1.info.bitrate, 2822400)
        self.failUnlessEqual(self.dff_2.info.bitrate, 11289600)
        self.failUnlessEqual(self.dff_dst.info.bitrate, 0)

    def test_notdsf(self):
        self.failUnlessRaises(IffError, DSDIFF, os.path.join(
            DATA_DIR, '2822400-1ch-0s-silence.dsf'))

    def test_pprint(self):
        self.failUnless(self.dff_1.pprint())

    def test_mime(self):
        self.failUnless("audio/x-dff" in self.dff_1.mime)

    def test_update_tags(self):
        from mutagen.id3 import TIT1
        tags = self.dff_id3.tags
        tags.add(TIT1(encoding=3, text="foobar"))
        tags.save()

        new = DSDIFF(self.dff_id3.filename)
        self.failUnlessEqual(new["TIT1"], ["foobar"])

    def test_delete_tags(self):
        self.dff_id3.tags.delete()
        new = DSDIFF(self.dff_id3.filename)
        self.failUnlessEqual(new.tags, None)

    def test_save_tags(self):
        from mutagen.id3 import TIT1
        self.dff_no_id3.add_tags()
        tags = self.dff_no_id3.tags
        tags.add(TIT1(encoding=3, text="foobar"))
        tags.save(self.dff_no_id3.filename)

        new = DSDIFF(self.dff_no_id3.filename)
        self.failUnlessEqual(new["TIT1"], ["foobar"])