"""Emailed invitations to make a local account (milestone 496): a one-time
key, stored as its sha256, with the role and expiry the admin chose.

Revision ID: 0037_user_invites
Revises: 0036_user_email_choices
Create Date: 2026-10-08
"""
from typing import Sequence, Union
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import postgresql

revision: str = "0037_user_invites"
down_revision: Union[str, None] = "0036_user_email_choices"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "user_invites",
        sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
        sa.Column("key_hash", sa.String(64), nullable=False, unique=True),
        sa.Column("email", sa.String(255), nullable=False),
        # The users table's enum type, already created.
        sa.Column("role", postgresql.ENUM("admin", "operator", "viewer", name="userrole", create_type=False),
                  nullable=False),
        sa.Column("days", sa.Integer, nullable=False),
        sa.Column("invited_by", sa.String(36), sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("sent_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("used_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("used_by", sa.String(36), sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True),
        sa.Column("revoked_at", sa.DateTime(timezone=True), nullable=True),
    )


def downgrade() -> None:
    op.drop_table("user_invites")