"""
Customer models for managing customer information.
"""
import uuid
from django.db import models
from django.utils import timezone


class Customer(models.Model):
    """Customer model with contact information"""
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    name = models.CharField(max_length=200)

    # Primary contact
    primary_contact_first_name = models.CharField(max_length=100)
    primary_contact_last_name = models.CharField(max_length=100)
    primary_contact_phone = models.CharField(max_length=20)
    primary_contact_email = models.EmailField()

    # Secondary contact (optional)
    secondary_contact_first_name = models.CharField(max_length=100, blank=True, null=True)
    secondary_contact_last_name = models.CharField(max_length=100, blank=True, null=True)
    secondary_contact_phone = models.CharField(max_length=20, blank=True, null=True)
    secondary_contact_email = models.EmailField(blank=True, null=True)

    # Billing information
    billing_contact_first_name = models.CharField(max_length=100)
    billing_contact_last_name = models.CharField(max_length=100)
    billing_street_address = models.CharField(max_length=255)
    billing_city = models.CharField(max_length=100)
    billing_state = models.CharField(max_length=100)
    billing_zip_code = models.CharField(max_length=20)
    billing_email = models.EmailField()
    billing_terms = models.TextField()

    # Dates
    start_date = models.DateField()
    end_date = models.DateField(blank=True, null=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        app_label = 'core'
        verbose_name = 'Customer'
        verbose_name_plural = 'Customers'
        ordering = ['name']
        indexes = [
            models.Index(fields=['name']),
            models.Index(fields=['primary_contact_email']),
        ]

    def __str__(self):
        return self.name

    @property
    def is_active(self):
        """Check if customer is active based on end_date"""
        return self.end_date is None or self.end_date > timezone.now().date()

    @property
    def primary_contact_full_name(self):
        """Get primary contact's full name"""
        return f"{self.primary_contact_first_name} {self.primary_contact_last_name}"

    @property
    def secondary_contact_full_name(self):
        """Get secondary contact's full name"""
        if self.secondary_contact_first_name and self.secondary_contact_last_name:
            return f"{self.secondary_contact_first_name} {self.secondary_contact_last_name}"
        return None

    @property
    def billing_contact_full_name(self):
        """Get billing contact's full name"""
        return f"{self.billing_contact_first_name} {self.billing_contact_last_name}"

    @property
    def billing_address(self):
        """Get formatted billing address"""
        return f"{self.billing_street_address}, {self.billing_city}, {self.billing_state} {self.billing_zip_code}"