from django.db import models

class Unit(models.Model):
    UNIT_TYPE_CHOICES = [
        ('Ambulance', 'Ambulance'),
        ('Police Car', 'Police Car'),
    ]
    STATUS_CHOICES = [
        ('Available', 'Available'),
        ('Dispatched', 'Dispatched'),
        ('Refueling', 'Refueling'),
        ('Out of Service', 'Out of Service'),
    ]

    unit_id = models.CharField(max_length=100, unique=True)
    unit_type = models.CharField(max_length=50, choices=UNIT_TYPE_CHOICES)
    location_lat = models.FloatField(default=0.0)
    location_lon = models.FloatField(default=0.0)
    status = models.CharField(max_length=50, choices=STATUS_CHOICES, default='Available')

    def __str__(self):
        return self.unit_id

    class Meta:
        ordering = ['unit_id']