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from django.core.validators import MinValueValidator, MinLengthValidator
from django.db import models
from products.models import Product
from suppliers.models import Supplier


# Create your models here.
class Price(models.Model):
    PRICE_DIGITS = 10
    PRICE_DECIMAL_DIGITS = 2
    MAX_LENGTH_NAME = 15
    MIN_LENGTH_NAME = 3

    Categories = {
        "video_card": 1.05,
        "hdd": 1.07,
        'processors': 1.04
    }

    product = models.ForeignKey(Product, on_delete=models.CASCADE, related_name='product', null=True)
    supplier = models.ForeignKey(Supplier, on_delete=models.CASCADE, related_name='supplier', null=True)
    name = models.CharField(
        max_length=MAX_LENGTH_NAME,
        validators=[
            MinLengthValidator(MIN_LENGTH_NAME, message="Name must be between 3 and 15 characters"),
        ],
        blank=False,
        null=False
    )
    category = models.CharField(max_length=20, validators=[MinLengthValidator(3)])
    price = models.DecimalField(
        max_digits=PRICE_DIGITS,
        decimal_places=PRICE_DECIMAL_DIGITS,
    )
    priority = models.IntegerField(validators=[MinValueValidator(1)])

    def save(self, *args, **kwargs):
        if self.category in self.Categories.keys():
            self.price = self.price * self.Categories[self.category]
        super().save(*args, **kwargs)
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