"""trending

Revision ID: 0003_trending
Revises: 0002_watch_providers
Create Date: 2026-09-06

Adds trending_entries (section 17, additive): Aurora's mirror of TMDb's
own trending lists, refreshed on a schedule -- see
app/services/ingestion/trending_ingestion.py.
"""

from __future__ import annotations

from collections.abc import Sequence

import sqlalchemy as sa
from alembic import op

revision: str = "0003_trending"
down_revision: str | None = "0002_watch_providers"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.create_table(
        "trending_entries",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            server_default=sa.text("now()"),
            nullable=False,
        ),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            server_default=sa.text("now()"),
            nullable=False,
        ),
        sa.Column("entity_type", sa.String(30), nullable=False),
        sa.Column("entity_id", sa.Uuid(), nullable=False),
        sa.Column("time_window", sa.String(10), nullable=False),
        sa.Column("rank", sa.Integer(), nullable=False),
    )
    op.create_index("ix_trending_entries_entity_id", "trending_entries", ["entity_id"])
    op.create_index(
        "ix_trending_entries_window", "trending_entries", ["entity_type", "time_window"]
    )


def downgrade() -> None:
    op.drop_index("ix_trending_entries_window", table_name="trending_entries")
    op.drop_index("ix_trending_entries_entity_id", table_name="trending_entries")
    op.drop_table("trending_entries")