"""
User models for KeepItGoing.
"""

import uuid
from django.contrib.auth.models import AbstractUser
from django.db import models


class User(AbstractUser):
    """
    Custom user model for KeepItGoing.

    Uses email as the primary identifier instead of username.
    """
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    email = models.EmailField(unique=True)

    # Profile fields
    timezone = models.CharField(max_length=50, default='UTC')
    avatar = models.ImageField(upload_to='avatars/', null=True, blank=True)

    # Preferences
    default_reminder_minutes = models.IntegerField(default=30)
    email_notifications = models.BooleanField(default=True)
    push_notifications = models.BooleanField(default=True)

    # Timestamps
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    # Use email as the username field
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['username']

    class Meta:
        db_table = 'users'
        verbose_name = 'user'
        verbose_name_plural = 'users'

    def __str__(self):
        return self.email


class DeviceToken(models.Model):
    """
    Stores push notification tokens for user devices.
    """
    PLATFORM_CHOICES = [
        ('android', 'Android'),
        ('web', 'Web'),
        ('desktop', 'Desktop'),
    ]

    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='device_tokens')
    platform = models.CharField(max_length=20, choices=PLATFORM_CHOICES)
    token = models.TextField()
    device_name = models.CharField(max_length=255, blank=True)
    is_active = models.BooleanField(default=True)
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        db_table = 'device_tokens'
        unique_together = ['user', 'token']

    def __str__(self):
        return f"{self.user.email} - {self.platform} - {self.device_name}"