from django.db import models
from django.conf import settings


class PotholeDetection(models.Model):
    uploaded_image = models.ImageField(upload_to='road_detection/uploads/')
    result_image = models.ImageField(upload_to='road_detection/results/', blank=True, null=True)
    detection_count = models.IntegerField(default=0)
    confidence_threshold = models.FloatField(default=0.25)
    created_at = models.DateTimeField(auto_now_add=True)
    created_by = models.ForeignKey(
        settings.AUTH_USER_MODEL,
        on_delete=models.SET_NULL,
        null=True,
        blank=True,
    )
    notes = models.TextField(blank=True)

    # GPS de la photo source (extrait de l'EXIF)
    image_lat = models.FloatField(null=True, blank=True)
    image_lon = models.FloatField(null=True, blank=True)

    # Détail des détections individuelles avec coordonnées GPS estimées
    detections_data = models.JSONField(null=True, blank=True)

    class Meta:
        ordering = ['-created_at']
        verbose_name = 'Pothole Detection'
        verbose_name_plural = 'Pothole Detections'

    def __str__(self):
        return f"Detection #{self.pk} - {self.detection_count} pothole(s) - {self.created_at:%Y-%m-%d %H:%M}"