from django.db import models
from django.core.validators import MaxValueValidator, MinValueValidator

class Review(models.Model):
    project = models.ForeignKey('projects.Project', related_name='reviews')
    stars = models.IntegerField(validators=[MinValueValidator(1), MaxValueValidator(5)])
    text = models.TextField()
    target_customer = models.ForeignKey('users.User', related_name='reviews_by_contractor', null=True, blank=True)
    target_contractor = models.ForeignKey('users.User', related_name='reviews_by_customer', null=True, blank=True)
    from_customer = models.ForeignKey('users.User', related_name='contractor_reviews', null=True, blank=True)
    from_contractor = models.ForeignKey('users.User', related_name='customer_reviews', null=True, blank=True)
    
    def __str__(self):
        return str(self.pk)
    
    class Meta:
        verbose_name = 'Отзыв'
        verbose_name_plural = 'Отзывы'
        
        unique_together = (
            ('from_customer', 'target_contractor', 'project'),
            ('from_contractor', 'target_customer', 'project'),
        )