# Generated by Django 5.2.12 on 2026-05-14

from django.db import migrations, models
from django.db.models import Q
from django.db.models.functions import Lower


def _normalize_email(value):
    if value is None:
        return None
    normalized = value.strip().lower()
    return normalized or None


def normalize_user_and_social_emails(apps, schema_editor):
    User = apps.get_model("users", "User")
    UserSocialAccount = apps.get_model("users", "UserSocialAccount")

    seen_emails = set()
    for user in User.objects.all().order_by("created_at", "id"):
        normalized_email = _normalize_email(user.email)
        if normalized_email in seen_emails:
            normalized_email = None
        elif normalized_email is not None:
            seen_emails.add(normalized_email)

        if user.email != normalized_email:
            user.email = normalized_email
            user.save(update_fields=["email"])

    for social_account in UserSocialAccount.objects.all().order_by("created_at", "id"):
        normalized_email = _normalize_email(social_account.email)
        if social_account.email != normalized_email:
            social_account.email = normalized_email
            social_account.save(update_fields=["email"])


class Migration(migrations.Migration):
    dependencies = [
        ("users", "0002_usersocialaccount"),
    ]

    operations = [
        migrations.AlterField(
            model_name="user",
            name="email",
            field=models.EmailField(blank=True, default=None, max_length=254, null=True),
        ),
        migrations.AlterField(
            model_name="usersocialaccount",
            name="email",
            field=models.EmailField(blank=True, default=None, max_length=254, null=True),
        ),
        migrations.RunPython(normalize_user_and_social_emails, migrations.RunPython.noop),
        migrations.AddConstraint(
            model_name="user",
            constraint=models.UniqueConstraint(
                Lower("email"),
                condition=Q(email__isnull=False),
                name="user_email_ci_uniq",
            ),
        ),
    ]