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


class Review(models.Model):
    STATUS_PENDING  = 'pending'
    STATUS_LIVE     = 'live'
    STATUS_REJECTED = 'rejected'
    STATUS_CHOICES  = [
        (STATUS_PENDING,  'Pending'),
        (STATUS_LIVE,     'Live'),
        (STATUS_REJECTED, 'Rejected'),
    ]
    REJECT_CHOICES = [
        ('spam',          'Spam'),
        ('inappropriate', 'Inappropriate'),
        ('fake',          'Fake'),
    ]

    reviewer        = models.ForeignKey(
        'accounts.User', on_delete=models.CASCADE, related_name='admin_reviews'
    )
    event           = models.ForeignKey(
        'events.Event', on_delete=models.CASCADE, related_name='admin_reviews'
    )
    rating          = models.IntegerField(
        validators=[MinValueValidator(1), MaxValueValidator(5)]
    )
    review_text     = models.TextField()
    submission_date = models.DateTimeField(auto_now_add=True)
    status          = models.CharField(
        max_length=10, choices=STATUS_CHOICES, default=STATUS_PENDING
    )
    reject_reason   = models.CharField(
        max_length=15, choices=REJECT_CHOICES, null=True, blank=True
    )
    display_name    = models.CharField(max_length=100, blank=True, default='')
    is_verified     = models.BooleanField(default=False)
    helpful_count   = models.IntegerField(default=0)
    flag_count      = models.IntegerField(default=0)

    class Meta:
        ordering = ['-submission_date']
        indexes  = [
            models.Index(fields=['status']),
            models.Index(fields=['submission_date']),
        ]

    def __str__(self):
        return f'Review #{self.pk} by {self.reviewer_id} — {self.status}'


class ReviewInteraction(models.Model):
    INTERACTION_CHOICES = [('HELPFUL', 'Helpful'), ('FLAG', 'Flag')]

    review           = models.ForeignKey(Review, on_delete=models.CASCADE, related_name='interactions')
    username         = models.CharField(max_length=255)
    interaction_type = models.CharField(max_length=20, choices=INTERACTION_CHOICES)
    created_at       = models.DateTimeField(auto_now_add=True)

    class Meta:
        unique_together = ('review', 'username', 'interaction_type')

    def __str__(self):
        return f'{self.username} {self.interaction_type} on Review #{self.review_id}'