"""Add musehub_fetch_mpack_cache table.

Pre-built fetch mpacks are cached here after every push so that
wire_fetch_mpack can return a presigned URL immediately (sub-second)
instead of building the mpack synchronously in the request path.

Revision ID: 0071
Revises: 0070
"""
from __future__ import annotations

import sqlalchemy as sa
from alembic import op

revision: str = "0071"
down_revision: str = "0070"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "musehub_fetch_mpack_cache",
        sa.Column("cache_id", sa.String(128), primary_key=True),
        sa.Column("repo_id", sa.String(128), nullable=False),
        sa.Column("tip_commit_id", sa.String(128), nullable=False),
        sa.Column("mpack_id", sa.String(128), nullable=False),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("now()"),
        ),
        sa.Column(
            "expires_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("now() + interval '7 days'"),
        ),
    )
    op.create_index(
        "ix_fetch_mpack_cache_repo_tip",
        "musehub_fetch_mpack_cache",
        ["repo_id", "tip_commit_id"],
        unique=True,
    )
    op.create_index(
        "ix_fetch_mpack_cache_expires_at",
        "musehub_fetch_mpack_cache",
        ["expires_at"],
    )


def downgrade() -> None:
    op.drop_index("ix_fetch_mpack_cache_expires_at", table_name="musehub_fetch_mpack_cache")
    op.drop_index("ix_fetch_mpack_cache_repo_tip", table_name="musehub_fetch_mpack_cache")
    op.drop_table("musehub_fetch_mpack_cache")