from django.db import models
from django.contrib.auth.models import User
from django.utils import timezone
from datetime import timedelta

class CarAuction(models.Model):
    title = models.CharField(max_length=200)
    make = models.CharField(max_length=100)
    model = models.CharField(max_length=100)
    year = models.IntegerField()
    description = models.TextField()
    image_url = models.URLField(max_length=500, blank=True, null=True)
    starting_bid = models.DecimalField(max_digits=10, decimal_places=2)
    current_bid = models.DecimalField(max_digits=10, decimal_places=2, null=True, blank=True)
    seller = models.ForeignKey(User, on_delete=models.CASCADE, related_name='auctions')
    created_at = models.DateTimeField(auto_now_add=True)
    end_date = models.DateTimeField()
    
    def is_active(self):
        return timezone.now() < self.end_date

    def time_left(self):
        if not self.is_active():
            return "Closed"
        delta = self.end_date - timezone.now()
        days = delta.days
        hours = delta.seconds // 3600
        minutes = (delta.seconds // 60) % 60
        if days > 0:
            return f"{days}d {hours}h"
        return f"{hours}h {minutes}m"

    def __str__(self):
        return f"{self.year} {self.make} {self.model}"

class Bid(models.Model):
    auction = models.ForeignKey(CarAuction, on_delete=models.CASCADE, related_name='bids')
    user = models.ForeignKey(User, on_delete=models.CASCADE)
    amount = models.DecimalField(max_digits=10, decimal_places=2)
    created_at = models.DateTimeField(auto_now_add=True)

    class Meta:
        ordering = ['-amount']

    def __str__(self):
        return f"{self.user.username} - {self.amount} on {self.auction.title}"