from django.conf import settings
from django.db import models
from apps.core.models import PersianTextNormalizationMixin, TimeStampedModel


class ContactGroup(PersianTextNormalizationMixin, TimeStampedModel):
    """A unit-owned address-book group; contacts may belong to many groups."""

    persian_text_fields = {"name": False, "description": True}
    name = models.CharField(max_length=150)
    unit = models.ForeignKey(
        "staff.OrganizationalUnit",
        on_delete=models.CASCADE,
        related_name="contact_groups",
    )
    description = models.TextField(blank=True)
    is_active = models.BooleanField(default=True)

    class Meta:
        constraints = [
            models.UniqueConstraint(fields=["unit", "name"], name="unique_contact_group_name_per_unit")
        ]
        ordering = ["unit__name", "name"]
        verbose_name = "گروه مخاطبان"
        verbose_name_plural = "گروه‌های مخاطبان"

    def __str__(self):
        return f"{self.unit}: {self.name}"


class CustomerProfile(PersianTextNormalizationMixin, TimeStampedModel):
    persian_text_fields = {"first_name": False, "last_name": False, "organization_name": False, "province": False, "city": False}
    class Type(models.TextChoices):
        PERSON="PERSON","شخص"; CONSUMER="CONSUMER","مصرف‌کننده نهایی"; SHOP="SHOP","فروشگاه"; REPRESENTATIVE="REPRESENTATIVE","نمایندگی"; COMPANY="COMPANY","شرکت"; OTHER="OTHER","سایر"
    class StakeholderType(models.TextChoices):
        CUSTOMER = "CUSTOMER", "مشتری"
        SUPPLIER = "SUPPLIER", "تامین‌کننده"
        CARRIER = "CARRIER", "باربری"
        OTHER = "OTHER", "سایر"
    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, related_name="customer_profile")
    first_name = models.CharField(max_length=100, blank=True)
    last_name = models.CharField(max_length=100, blank=True)
    customer_type = models.CharField(max_length=20, choices=Type.choices, blank=True)
    stakeholder_type = models.CharField(
        max_length=20,
        choices=StakeholderType.choices,
        default=StakeholderType.CUSTOMER,
        db_index=True,
    )
    organization_name = models.CharField(max_length=180, blank=True)
    groups = models.ManyToManyField(ContactGroup, blank=True, related_name="contacts")
    province = models.CharField(max_length=100, blank=True)
    city = models.CharField(max_length=100, blank=True)
    def __str__(self): return (f"{self.first_name} {self.last_name}".strip() or self.user.mobile or self.user.username)