"""Phase 11: Archivierung von Listen

Revision ID: 0013
Revises: 0012
Create Date: 2026-08-08
"""
from collections.abc import Sequence

import sqlalchemy as sa
from alembic import op

revision: str = "0013"
down_revision: str | None = "0012"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.add_column("list_member", sa.Column("archived_at", sa.DateTime(), nullable=True))
    op.add_column(
        "list_member", sa.Column("last_opened_at", sa.DateTime(), nullable=True)
    )
    # Bestandsmitgliedschaften nicht sofort der Automatik aussetzen:
    # Ohne Startwert waere last_opened_at NULL und damit scheinbar "nie
    # geoeffnet". Der Beitrittszeitpunkt ist die konservativere Annahme.
    op.execute(
        "UPDATE list_member SET last_opened_at = joined_at "
        "WHERE last_opened_at IS NULL"
    )

    op.add_column("shopping_list", sa.Column("warn_7d_at", sa.DateTime(), nullable=True))
    op.add_column("shopping_list", sa.Column("warn_1d_at", sa.DateTime(), nullable=True))


def downgrade() -> None:
    op.drop_column("shopping_list", "warn_1d_at")
    op.drop_column("shopping_list", "warn_7d_at")
    op.drop_column("list_member", "last_opened_at")
    op.drop_column("list_member", "archived_at")