"""
Service models for tracking service events.
"""
import uuid
from django.db import models
from django.utils import timezone


class Service(models.Model):
    """Service records for accounts"""
    STATUS_CHOICES = (
        ('scheduled', 'Scheduled'),
        ('in_progress', 'In Progress'),
        ('completed', 'Completed'),
        ('cancelled', 'Cancelled'),
    )
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    account = models.ForeignKey('Account', on_delete=models.CASCADE, related_name='services')
    date = models.DateField()
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='scheduled')
    team_members = models.ManyToManyField('Profile', related_name='services')
    notes = models.TextField(blank=True, null=True)

    # Service window
    deadline_start = models.DateTimeField()
    deadline_end = models.DateTimeField()

    # Timestamps
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)
    completed_at = models.DateTimeField(blank=True, null=True)

    class Meta:
        app_label = 'core'
        verbose_name = 'Service'
        verbose_name_plural = 'Services'
        ordering = ['-date']
        indexes = [
            models.Index(fields=['account']),
            models.Index(fields=['date']),
            models.Index(fields=['status']),
        ]

    def __str__(self):
        return f"Service for {self.account.name} on {self.date}"

    def save(self, *args, **kwargs):
        """Override save to set completed_at when status changes to completed"""
        if self.status == 'completed' and not self.completed_at:
            self.completed_at = timezone.now()
        super().save(*args, **kwargs)

    @property
    def is_upcoming(self):
        """Check if service is upcoming"""
        return self.date > timezone.now().date()

    @property
    def is_today(self):
        """Check if service is scheduled for today"""
        return self.date == timezone.now().date()

    @property
    def is_past_due(self):
        """Check if service is past due"""
        return self.date < timezone.now().date() and self.status not in ['completed', 'cancelled']

    @property
    def team_member_names(self):
        """Get list of team member names"""
        return [f"{member.first_name} {member.last_name}" for member in self.team_members.all()]