"""demo account: users.is_demo + demo_whitelist

Revision ID: 0014_demo_account
Revises: 0013_playlist_fingerprint
Create Date: 2026-06-16

Adds the shared demo-account plumbing:
  - users.is_demo — marks the single shared demo user (no OAuth token / YouTube scope).
  - demo_whitelist — admin-curated emails that may enter the demo account from the login
    page without Google sign-in. Multiple emails are just keys to the same shared door.
The demo user row itself is created lazily on first demo login (works across all three DBs
without a data migration), so this only adds the schema.
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op

revision: str = "0014_demo_account"
down_revision: Union[str, None] = "0013_playlist_fingerprint"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.add_column(
        "users",
        sa.Column(
            "is_demo",
            sa.Boolean(),
            nullable=False,
            server_default=sa.false(),
        ),
    )
    op.create_index("ix_users_is_demo", "users", ["is_demo"])

    op.create_table(
        "demo_whitelist",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("email", sa.String(length=320), nullable=False),
        sa.Column("note", sa.Text(), nullable=True),
        sa.Column("added_by", sa.String(length=320), nullable=True),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.func.now(),
            nullable=False,
        ),
    )
    op.create_index(
        "ix_demo_whitelist_email", "demo_whitelist", ["email"], unique=True
    )


def downgrade() -> None:
    op.drop_index("ix_demo_whitelist_email", table_name="demo_whitelist")
    op.drop_table("demo_whitelist")
    op.drop_index("ix_users_is_demo", table_name="users")
    op.drop_column("users", "is_demo")