"""add users.diagnostics_level + diagnostics_until — a user's consented diagnostics level (E22 S5)

Revision ID: 0087_users_diagnostics_level
Revises: 0086_log_events
Create Date: 2026-09-17

Both NULL = the base level (Alap). A raised level is ALWAYS paired with its expiry, computed by the
server at consent time (`app/diagnostics.py`), so no client can ask for a level that never ends.
Columns rather than `users.preferences`: that JSON is written wholesale by the client, and a consent
with a lifetime must not be something a client can write.
"""

import sqlalchemy as sa
from alembic import op

revision: str = "0087_users_diagnostics_level"
down_revision: str | None = "0086_log_events"
branch_labels: str | None = None
depends_on: str | None = None


def upgrade() -> None:
    op.add_column("users", sa.Column("diagnostics_level", sa.String(8), nullable=True))
    op.add_column(
        "users", sa.Column("diagnostics_until", sa.DateTime(timezone=True), nullable=True)
    )


def downgrade() -> None:
    op.drop_column("users", "diagnostics_until")
    op.drop_column("users", "diagnostics_level")