"""adopt German as the untouched system reference locale

Revision ID: a36d8e4f9b12
Revises: f25c9d3e7a01
Create Date: 2026-08-05 00:00:00.000000
"""

from __future__ import annotations

from alembic import op
import sqlalchemy as sa


revision = "a36d8e4f9b12"
down_revision = "f25c9d3e7a01"
branch_labels = None
depends_on = None


def upgrade() -> None:
    bind = op.get_bind()
    if "core_system_settings" not in set(sa.inspect(bind).get_table_names()):
        return

    settings = sa.table(
        "core_system_settings",
        sa.column("id", sa.String),
        sa.column("default_locale", sa.String),
        sa.column("created_at", sa.DateTime(timezone=True)),
        sa.column("updated_at", sa.DateTime(timezone=True)),
    )
    bind.execute(
        settings.update()
        .where(settings.c.id == "global")
        .where(settings.c.default_locale == "en")
        .where(settings.c.created_at == settings.c.updated_at)
        .values(default_locale="de", updated_at=sa.func.now())
    )


def downgrade() -> None:
    # Locale selection is user-visible state. A downgrade must not overwrite a
    # German value that may have been selected explicitly after this migration.
    pass