from django.db import models
from django.contrib.auth.models import User


class Factor(models.Model):
    class Meta:
        permissions = [
            ("ViewFactor", "ViewFactor"),
            ("DelFactor", "DelFactor"),
            ("EditFactor", "EditFactor"),
            ("AddFactor", "AddFactor")
        ]
    customer = models.ForeignKey('Customer', on_delete=models.CASCADE)
    create_date = models.DateTimeField(auto_now_add=True)
    amount = models.IntegerField()
    discount = models.IntegerField(null=True, blank=True)
    deadline = models.DateTimeField(null=True, blank=True)
    desc = models.CharField(max_length=100, default='')
    user = models.ForeignKey(User, on_delete=models.SET_NULL, null=True, blank=True)
    statusList = [
        ('unpaid', 'unpaid'),
        ('paid', 'paid'),
        ('cancell', 'cancell'),
    ]
    pay_status = models.CharField(max_length=10, choices=statusList, default='')
    FactorTypeList = [
        ('Nasb', 'Nasb'),
        ('Khadamat', 'Khadamat'),
        ('Garranty', 'Garranty'),
    ]
    FactorType = models.CharField(max_length=10, choices=FactorTypeList, default='')
    PayTypeList = [
        ('naghd', 'naghd'),
        ('cardToCard', 'cardToCard'),
        ('kartKhan', 'kartKhan'),
        ('nesiye', 'nesiye'),
        ('check', 'check'),
    ]
    PayType = models.CharField(max_length=30, choices=PayTypeList, default='')

    # فیلد جدید برای حذف نرم
    is_active = models.BooleanField(default=True, null=True, blank=True)

    # بازنویسی متد حذف: ابطال فاکتور به جای حذف فیزیکی
    def delete(self, *args, **kwargs):
        # فاکتور باطل می‌شود اما رکوردهای انبار دست‌نخورده باقی می‌مانند!
        self.is_active = False
        self.pay_status = 'cancell'
        self.save()


class FactorIteam(models.Model):  # پیشنهاد: در آینده املای نام این کلاس را به FactorItem اصلاح کنید
    factor = models.ForeignKey(Factor, on_delete=models.CASCADE)
    product = models.ForeignKey('Product', on_delete=models.CASCADE, null=True, blank=True)
    product_name = models.CharField(max_length=200, default='')
    num = models.IntegerField()
    amount = models.IntegerField()
    garantyEsh = models.CharField(max_length=100, default='', null=True, blank=True)