"""Definición de los modelos que utilizara la aplicación Lists"""
from django.core.validators import MinValueValidator, MaxValueValidator

from users.models import User
from django.db.models import CharField, TextField, IntegerField
from django.db.models import ForeignKey, ManyToManyField
from django.db.models import CASCADE
from django.db.models import Model


class Entity(Model):
    """Entidad la cual representa una entidad de musicbrainz

    Pueden ser: artist, release-group, release o recording
    """

    class Meta:
        verbose_name = 'Entidad'
        verbose_name_plural = 'Entidades'

    ENTITY_TYPES = [
        ('artist', 'Artista'),
        ('release-group', 'Grupo de Lanzamientos'),
        ('release', 'Lanzamiento'),
        ('recording', 'Grabación')
    ]
    mbid = CharField('mbid', max_length=36, primary_key=True)
    entity_type = CharField('tipo', max_length=25, choices=ENTITY_TYPES)

    def __str__(self):
        return self.mbid


class Tag(Model):
    """Tag creada por un usuario"""
    user = ForeignKey(User, on_delete=CASCADE, related_name='tags')
    name = CharField('nombre', max_length=50)

    def __str__(self):
        return self.name


class ListItem(Model):
    """Item de la lista de un usuario"""

    class Meta:
        verbose_name = 'item de lista'
        verbose_name_plural = 'items de la lista'

    stars_validators = [MinValueValidator(0), MaxValueValidator(5)]

    user = ForeignKey(User, on_delete=CASCADE, related_name='list')
    entity = ForeignKey(Entity, on_delete=CASCADE, related_name='entities')
    stars = IntegerField('estrellas', default=0, validators=stars_validators, blank=True)
    opinion = TextField('opinion', default='', blank=True)
    tags = ManyToManyField(Tag, related_name='list', blank=True)

    def __str__(self):
        return f'{self.user.username}:{self.entity.mbid}'


class OpinionHelpful(Model):
    """Voto sobre una opinion"""

    class Meta:
        verbose_name = 'valoración de opinion'
        verbose_name_plural = 'valoraciones de opinion'

    VOTES = [
        ('Y', 'Si'),
        ('N', 'No'),
        ('F', 'Divertida')
    ]

    user = ForeignKey(User, on_delete=CASCADE)
    opinion = ForeignKey(ListItem, on_delete=CASCADE)
    vote = CharField('voto', max_length=1, choices=VOTES)

    def __str__(self):
        return f'{self.vote}'