from django.db import models
from django.utils import timezone
from api.models import User
import regex
from django.core.exceptions import ValidationError


def validate_mac_address(value):
    if not regex.match(r"^([0-9A-Fa-f]{2}-){5}[0-9A-Fa-f]{2}$", value):
        raise ValidationError(
            "This field accepts a valid MAC address in the format XX-XX-XX-XX-XX-XX using '-' as the separator."
        )
    return value


class Device(models.Model):
    name = models.CharField(max_length=255)
    mac = models.CharField(
        max_length=255,
        validators=[
            validate_mac_address,
        ],
    )
    has_a_pending_payment = models.BooleanField(default=False)
    reason_for_blocking = models.CharField(max_length=255, null=True, blank=True)
    is_active = models.BooleanField(default=False)
    registered = models.BooleanField(default=False)
    blocked = models.BooleanField(default=False)
    blocked_by = models.CharField(
        max_length=255,
        choices=[("ADMIN", "Admin"), ("PARENT", "Parent")],
        default="PARENT",
    )
    expiry_date = models.DateTimeField(null=True, blank=True)
    created_at = models.DateTimeField(default=timezone.now)
    updated_at = models.DateTimeField(auto_now=True)
    user = models.ForeignKey(
        User, on_delete=models.SET_NULL, null=True, blank=True, related_name="devices"
    )

    def __str__(self):
        return self.name