from django.conf import settings
from django.contrib.gis.db import models as gis_models
from django.core.validators import RegexValidator
from django.db import models

from apps.locations.models import City, Neighborhood
from utils.models import BaseModel


class StoreCategory(BaseModel):
    name = models.CharField(max_length=100, unique=True)
    icon = models.ImageField(upload_to='store_categories/', null=True, blank=True)
    order = models.PositiveSmallIntegerField(default=0)

    class Meta:
        ordering = ['order', 'name']
        verbose_name = 'دسته‌بندی فروشگاه'
        verbose_name_plural = 'دسته‌بندی‌های فروشگاه'

    def __str__(self):
        return self.name


class Store(BaseModel):
    class Status(models.TextChoices):
        PENDING = 'pending', 'در انتظار تایید'
        APPROVED = 'approved', 'تایید شده'
        SUSPENDED = 'suspended', 'معلق شده'

    owner = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.PROTECT, related_name='store')
    category = models.ForeignKey(StoreCategory, on_delete=models.PROTECT, related_name='stores')
    name = models.CharField(max_length=150)
    description = models.TextField(blank=True)
    logo = models.ImageField(upload_to='store_logos/', null=True, blank=True)
    cover_image = models.ImageField(upload_to='store_covers/', null=True, blank=True)
    phone_number = models.CharField(max_length=20, blank=True)

    city = models.ForeignKey(City, on_delete=models.PROTECT, related_name='stores')
    address = models.TextField()
    location = gis_models.PointField(geography=True, null=True, blank=True)
    service_neighborhoods = models.ManyToManyField(
        Neighborhood, related_name='stores', blank=True,
        help_text='محله‌هایی که این فروشگاه به آن‌ها ارسال دارد.',
    )
    delivery_radius_km = models.DecimalField(max_digits=5, decimal_places=2, default=5)

    min_order_amount = models.PositiveBigIntegerField(default=0)
    delivery_fee = models.PositiveBigIntegerField(default=0)
    free_delivery_threshold = models.PositiveBigIntegerField(null=True, blank=True)
    commission_percent = models.DecimalField(
        max_digits=5, decimal_places=2, null=True, blank=True,
        help_text='در صورت خالی بودن، از DEFAULT_COMMISSION_PERCENT استفاده می‌شود.',
    )

    accepts_wallet = models.BooleanField(default=True)
    accepts_online = models.BooleanField(default=True)
    accepts_cash_on_delivery = models.BooleanField(default=True)

    rating_avg = models.DecimalField(max_digits=3, decimal_places=2, default=0)
    rating_count = models.PositiveIntegerField(default=0)

    status = models.CharField(max_length=10, choices=Status.choices, default=Status.PENDING)
    is_open = models.BooleanField(default=True)

    class Meta:
        ordering = ['-created_at']
        verbose_name = 'فروشگاه'
        verbose_name_plural = 'فروشگاه‌ها'

    def __str__(self):
        return self.name

    @property
    def commission_percent_effective(self):
        if self.commission_percent is not None:
            return self.commission_percent
        from django.conf import settings as dj_settings
        return dj_settings.DEFAULT_COMMISSION_PERCENT


class StoreWorkingHours(BaseModel):
    class Weekday(models.IntegerChoices):
        SATURDAY = 0, 'شنبه'
        SUNDAY = 1, 'یکشنبه'
        MONDAY = 2, 'دوشنبه'
        TUESDAY = 3, 'سه‌شنبه'
        WEDNESDAY = 4, 'چهارشنبه'
        THURSDAY = 5, 'پنجشنبه'
        FRIDAY = 6, 'جمعه'

    store = models.ForeignKey(Store, on_delete=models.CASCADE, related_name='working_hours')
    weekday = models.PositiveSmallIntegerField(choices=Weekday.choices)
    opens_at = models.TimeField(null=True, blank=True)
    closes_at = models.TimeField(null=True, blank=True)
    is_closed = models.BooleanField(default=False)

    class Meta:
        ordering = ['weekday']
        unique_together = ('store', 'weekday')
        verbose_name = 'ساعت کاری فروشگاه'
        verbose_name_plural = 'ساعات کاری فروشگاه'

    def __str__(self):
        return f'{self.store.name} - {self.get_weekday_display()}'


class StoreBankAccount(BaseModel):
    store = models.OneToOneField(Store, on_delete=models.CASCADE, related_name='bank_account')
    iban = models.CharField(
        max_length=26,
        validators=[RegexValidator(r'^IR\d{24}$', 'شماره شبا معتبر نیست.')],
    )
    account_holder_name = models.CharField(max_length=150)

    class Meta:
        verbose_name = 'حساب بانکی فروشگاه'
        verbose_name_plural = 'حساب‌های بانکی فروشگاه'

    def __str__(self):
        return f'{self.store.name} - {self.iban}'