import protobuf from "npm:protobufjs";
import { assertEquals } from "https://deno.land/std@0.224.0/testing/asserts.ts";

/**
 * Proof of Concept: Protocol Buffers (Gen 2)
 *
 * Demonstrates serializing and deserializing agent state using actual
 * protobufjs instead of a JSON stringifier mock, showing high-performance
 * I/O for vector math and state passing.
 */

const protoDefinition = `
syntax = "proto3";

message AgentState {
  string agentId = 1;
  string status = 2;
  int32 memoryUsage = 3;
}
`;

if (import.meta.main) {
  console.log("Running Protocol Buffers PoC (Gen 2) tests...");

  try {
    const root = protobuf.parse(protoDefinition).root;
    const AgentState = root.lookupType("AgentState");

    const payload = {
      agentId: "adversary-01",
      status: "active",
      memoryUsage: 1024,
    };

    const errMsg = AgentState.verify(payload);
    if (errMsg) throw Error(errMsg);

    const message = AgentState.create(payload);
    const buffer = AgentState.encode(message).finish();

    console.log(`Original Data:`, payload);
    console.log(`Serialized Size: ${buffer.length} bytes (binary)`);

    const decodedMessage = AgentState.decode(buffer);
    const deserialized = AgentState.toObject(decodedMessage, {
      longs: String,
      enums: String,
      bytes: String,
    });

    console.log("Deserialized Data:", deserialized);

    assertEquals(deserialized.agentId, payload.agentId);
    assertEquals(deserialized.status, payload.status);
    assertEquals(deserialized.memoryUsage, payload.memoryUsage);

    console.log(
      "✅ Protocol Buffers PoC (Gen 2) successful: Real protobuf serialization/deserialization worked.",
    );
  } catch (err) {
    console.error("❌ Protocol Buffers PoC (Gen 2) failed:", err);
    Deno.exit(1);
  }
}