from django.db import models
from django.template.defaultfilters import slugify


class Artist(models.Model):
    """ An Artist of the label.

    Attributes: 
        name: project / band name
        image: image file associated with this project
    """
    name = models.CharField(max_length = 64)
    slug = models.SlugField()
    image = models.ImageField(upload_to = "artists")
    url_bandcamp = models.URLField(blank = True)
    url_soundcloud = models.URLField(blank = True)
    genre = models.CharField(max_length = 256)
    description = models.TextField(blank = True)

    def __str__(self):
        return self.name

    def save(self, *args, **kwargs):
        self.slug = slugify(self.name)
        super().save(*args, **kwargs)

    class Meta(object):
        ordering = ("name",)


rel_types_hint = "full-length (0), EP (1), Split (2), Démo (3)"

class Release(models.Model):
    """ A release (album, EP, ...) of the label.

    Each release has an associated number "ident" to use in the catalog. It has
    of course a title, several possible artists, and other informations.

    Attributes:
        ident: catalog number
        title: release title
        contributors: list of Artists who contributed to this release
        release_type: see below
        year: year of release
        cover: image file associated to this release
    """
    ident = models.IntegerField()
    title = models.CharField(max_length = 256)
    contributors = models.ManyToManyField(Artist)
    release_type = models.IntegerField(default = 0, help_text = rel_types_hint)
    cover = models.ImageField(upload_to = "releases")
    year = models.IntegerField()
    embed = models.TextField(blank = True)
    description = models.TextField(blank = True)

    def __str__(self):
        return self.title

    class Meta(object):
        ordering = ("ident", "title")