"""Make musehub_pack_index global — drop repo_id column and its FK.

Pack index entries are content-addressed: the same object_id+pack_id pair is valid
for every repo that has ever pushed those bytes.  repo_id was the wrong abstraction
and caused wire_fetch_mpack to miss packs from other repos (same objects, different repo).

PK (object_id, pack_id) is unchanged.  Drop the (repo_id, object_id) index and replace
it with a plain object_id index — lookups are now global, not per-repo.
"""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op

revision = "0062"
down_revision = "0061"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.drop_index("ix_musehub_pack_index_repo_object", table_name="musehub_pack_index")
    op.drop_constraint("musehub_pack_index_repo_id_fkey", "musehub_pack_index", type_="foreignkey")
    op.drop_column("musehub_pack_index", "repo_id")
    op.create_index("ix_musehub_pack_index_object_id", "musehub_pack_index", ["object_id"])


def downgrade() -> None:
    op.drop_index("ix_musehub_pack_index_object_id", table_name="musehub_pack_index")
    op.add_column(
        "musehub_pack_index",
        sa.Column("repo_id", sa.String(128), nullable=False, server_default=""),
    )
    op.create_foreign_key(
        "musehub_pack_index_repo_id_fkey",
        "musehub_pack_index", "musehub_repos",
        ["repo_id"], ["repo_id"],
        ondelete="CASCADE",
    )
    op.create_index(
        "ix_musehub_pack_index_repo_object",
        "musehub_pack_index",
        ["repo_id", "object_id"],
    )