"""MCP gateway: scoped bearer tokens for external AI agents

Revision ID: a8b9c0d1e2f3
Revises: f7a8b9c0d1e2
Create Date: 2026-10-14 12:00:00.000000

Owned by Agent 1 (PLAN-v2 §6). Only the token hash and a display prefix are
stored; the raw token is shown once at issue time.
"""

from __future__ import annotations

from collections.abc import Sequence

import sqlalchemy as sa
from alembic import op

revision: str = "a8b9c0d1e2f3"
down_revision: str | None = "f7a8b9c0d1e2"
branch_labels: str | Sequence[str] | None = None
depends_on: str | Sequence[str] | None = None


def upgrade() -> None:
    op.create_table(
        "mcp_tokens",
        sa.Column("id", sa.String(length=32), primary_key=True),
        sa.Column(
            "organization_id",
            sa.String(length=32),
            sa.ForeignKey("organizations.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("name", sa.String(length=120), nullable=False),
        # ``unique=True`` carries the index (``ix_mcp_tokens_token_hash``), so no
        # separate create_index is needed — a second one would drift.
        sa.Column("token_hash", sa.String(length=128), nullable=False, unique=True),
        sa.Column("prefix", sa.String(length=16), nullable=False),
        sa.Column("scopes", sa.String(length=255), nullable=False, server_default=""),
        sa.Column("created_by_user_id", sa.String(length=32), sa.ForeignKey("users.id")),
        sa.Column("expires_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("last_used_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("revoked_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
    )
    op.create_index("ix_mcp_tokens_organization_id", "mcp_tokens", ["organization_id"])


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