let requestId = 0;

function coordinatorWireRequest(payload, prefix = "acceptance") {
  if (payload && payload.type === "coordinator_request") return payload;
  if (!payload || typeof payload.type !== "string" || !payload.type.trim()) {
    throw new Error("coordinator payload must have a non-empty type");
  }
  requestId += 1;
  return {
    type: "coordinator_request",
    protocol_version: 1,
    request_id: `${prefix}-${process.pid}-${requestId}`,
    operation: payload.type,
    authentication: authenticationMetadata(payload),
    payload,
  };
}

function authenticationMetadata(payload) {
  if (payload.type === "authenticated") {
    return {
      kind: "cli_session",
      session: true,
      request_operation: payload.request?.type || "unknown",
    };
  }
  if (payload.type === "signed_node" || payload.node_signature) {
    return { kind: "node_signature", node: payload.node || null };
  }
  if (payload.agent_signature) {
    return {
      kind: "agent_signature",
      agent: payload.actor_agent || null,
      fingerprint: payload.agent_public_key_fingerprint || null,
    };
  }
  if (payload.admin_token) {
    return { kind: "admin_credential" };
  }
  return { kind: "none" };
}

module.exports = { coordinatorWireRequest };