"""ticker_universe — server-wide set of tracked tickers, no user attribution

Phase G of the multi-user migration. Adds the additive table only; old
portfolio tables (positions / portfolio_snapshots / portfolios) are dropped
in migration 0010 after the new path is verified end-to-end.

Revision ID: 0009
Revises: 0008
Create Date: 2026-05-16
"""
from typing import Sequence, Union

import sqlalchemy as sa
from alembic import op


revision: str = "0009"
down_revision: Union[str, None] = "0008"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "ticker_universe",
        # Yahoo Finance ticker is the canonical key. T212 shortnames are
        # resolved to Yahoo tickers at parse time via instrument_map.
        sa.Column("yahoo_ticker", sa.String(32), primary_key=True),
        sa.Column("currency", sa.String(8)),
        sa.Column("first_seen_at", sa.DateTime(timezone=True), nullable=False),
        # Refreshed whenever the ticker appears in a /api/portfolio/parse
        # or /api/analyze request. Eviction cron prunes rows older than
        # the configured TTL.
        sa.Column("last_referenced_at", sa.DateTime(timezone=True), nullable=False),
    )
    op.create_index(
        "ix_universe_last_ref", "ticker_universe", ["last_referenced_at"]
    )


def downgrade() -> None:
    op.drop_index("ix_universe_last_ref", table_name="ticker_universe")
    op.drop_table("ticker_universe")