from django.db import migrations, models
from django.db.backends.postgresql.schema import BaseDatabaseSchemaEditor
from django.db.migrations.state import StateApps


# change emoji set to text if emoji_alt_code is true.
def change_emojiset(apps: StateApps, schema_editor: BaseDatabaseSchemaEditor) -> None:
    UserProfile = apps.get_model("zerver", "UserProfile")
    for user in UserProfile.objects.filter(emoji_alt_code=True):
        user.emojiset = "text"
        user.save(update_fields=["emojiset"])


def reverse_change_emojiset(apps: StateApps, schema_editor: BaseDatabaseSchemaEditor) -> None:
    UserProfile = apps.get_model("zerver", "UserProfile")
    for user in UserProfile.objects.filter(emojiset="text"):
        # Resetting `emojiset` to "google" (the default) doesn't make an
        # exact round trip, but it's nearly indistinguishable -- the setting
        # shouldn't really matter while `emoji_alt_code` is true.
        user.emoji_alt_code = True
        user.emojiset = "google"
        user.save(update_fields=["emoji_alt_code", "emojiset"])


class Migration(migrations.Migration):

    dependencies = [
        ("zerver", "0129_remove_userprofile_autoscroll_forever"),
    ]

    operations = [
        migrations.AlterField(
            model_name="userprofile",
            name="emojiset",
            field=models.CharField(
                choices=[
                    ("google", "Google"),
                    ("apple", "Apple"),
                    ("twitter", "Twitter"),
                    ("emojione", "EmojiOne"),
                    ("text", "Plain text"),
                ],
                default="google",
                max_length=20,
            ),
        ),
        migrations.RunPython(change_emojiset, reverse_change_emojiset, elidable=True),
        migrations.RemoveField(
            model_name="userprofile",
            name="emoji_alt_code",
        ),
    ]
