from __future__ import unicode_literals

from django.utils import timezone
from django.db import models
from django.core.files.storage import default_storage
from django.core.files.base import ContentFile

import os
from mutagen import oggvorbis


class Recording(models.Model):
    file = models.FileField(upload_to='music/')
    artist = models.CharField(max_length=200, blank=True)
    album = models.CharField(max_length=100, blank=True)
    title = models.CharField(max_length=100, blank=True)
    location = models.CharField(max_length=100, blank=True)
    date = models.CharField(max_length=100, blank=True)

    def performers(self):
        return self.artist.split(';')

    def save(self, *args, **kwargs):
        path = os.path.join('/home/john/jheu/jheu/media', 'tmp','tmp.ogg')
        tmp = default_storage.save(path, ContentFile(self.file.file.read()))

        ov = oggvorbis.Open(tmp)

        if not self.artist:
            self.artist = ov.get('artist')[0]
        if not self.album:
            self.album = ov.get('album')[0]
        if not self.title:
            self.title = ov.get('title')[0]
        if not self.location:
            self.location = ov.get('location')[0]
        if not self.date:
            self.date = ov.get('date')[0]

        tmp = default_storage.delete(path)
        super(Recording, self).save(*args, **kwargs)

    def __unicode__(self):
        return self.title

    class Meta:
        ordering = ['date',]


class Set(models.Model):
    desc = models.TextField(max_length=2000, blank=True)
    recordings = models.ManyToManyField(Recording)
    num = models.IntegerField()

    def __unicode__(self):
        return "...{}...".format(self.desc[:30])

    class Meta:
        ordering = ['num',]


class Session(models.Model):
    title = models.CharField(max_length=100)
    date = models.DateTimeField(default=timezone.now)
    slug = models.SlugField(max_length=100, unique=True,
        allow_unicode=True, blank=True)
    sets = models.ManyToManyField(Set)

    def __unicode__(self):
        return self.title

    class Meta:
        ordering = ['-date',]