from django.db import models
from .album import Album
from .artist import Artist
from .utils import from_json

class TrackManager(models.Manager):
    def get_queryset(self):
        return super().get_queryset().filter(old=False)

class Track(models.Model):
    def __str__(self):
        s = f"'{self.name}'"
        if self.artists.count() > 0:
            artists = list(map(lambda a:a.name, self.artists.all()))
            s += " by "
            s += " & ".join(artists)
        return s
    id = models.CharField(primary_key=True, max_length=128)
    name = models.CharField(max_length=255)
    artists = models.ManyToManyField(Artist)
    album = models.ForeignKey(Album, null=True, on_delete=models.SET_NULL)

    explicit = models.BooleanField(default=False)
    duration_ms = models.PositiveIntegerField(null=True)
    popularity = models.PositiveIntegerField(null=True)

    banter = models.TextField(blank=True)

    old = models.BooleanField(default=False)

    objects = TrackManager()
    all_tracks = models.Manager()