/**
 * GridStamp — Claude Agent SDK: Proof-of-Presence Example
 *
 * What this does (for insurance underwriters reading this file):
 *   1. A mock camera sensor produces a synthetic HMAC-signed frame.
 *   2. Claude orchestrates four tools: read_sensor → verify_spatial_proof →
 *      check_antispoofing → write_attestation.
 *   3. Every attestation is appended to ./proof-audit.ndjson — the audit trail
 *      your claims team reads to establish whether the robot was where it said.
 *   4. The output is a structured AttestationResult: status, confidence score,
 *      spoofing signals, and a pointer to the immutable audit log.
 *   5. Run: npm run example:agent  (requires ANTHROPIC_API_KEY in env)
 */

import crypto from 'node:crypto';
import type { CameraFrame, Pose } from '../src/types/index.js';
import { runProofAgent } from '../src/agent/proof-agent.js';

// ── Mock sensor data ──────────────────────────────────────────────────────────

const ROBOT_ID = 'DLV-DEMO-001';
const HMAC_SECRET = 'gridstamp-example-secret-min32chars!!';
const FRAME_WIDTH = 64;
const FRAME_HEIGHT = 64;

/**
 * Build a synthetic CameraFrame that looks like it came from a real camera.
 * The HMAC is computed over (id + timestamp + sequenceNumber) to mimic the
 * production HMAC-signing that happens at capture time in the perception layer.
 */
function buildMockFrame(sequenceNumber: number): CameraFrame {
  const id = `frame-${sequenceNumber}-${Date.now()}`;
  const timestamp = Date.now();

  // Synthetic RGB: grey gradient with a per-frame noise seed
  const pixelCount = FRAME_WIDTH * FRAME_HEIGHT * 3;
  const rgb = new Uint8Array(pixelCount);
  for (let i = 0; i < pixelCount; i++) {
    rgb[i] = (i + sequenceNumber * 7) % 256;
  }

  // Synthetic depth map (metres, constant plane at ~2 m)
  const depth = new Float32Array(FRAME_WIDTH * FRAME_HEIGHT);
  depth.fill(2.0 + Math.random() * 0.05);

  const pose: Pose = {
    position: { x: 37.421998, y: -122.084, z: 0.0 },
    orientation: { w: 1, x: 0, y: 0, z: 0 },
    timestamp,
  };

  // HMAC-SHA256 over id|timestamp|sequenceNumber — mirrors perception/camera.ts
  const hmac = crypto
    .createHmac('sha256', HMAC_SECRET)
    .update(`${id}|${timestamp}|${sequenceNumber}`)
    .digest('hex');

  return { id, timestamp, rgb, width: FRAME_WIDTH, height: FRAME_HEIGHT, depth, pose, hmac, sequenceNumber };
}

// ── Expected pose ─────────────────────────────────────────────────────────────

const EXPECTED_POSE: Pose = {
  position: { x: 37.421998, y: -122.084, z: 0.0 },
  orientation: { w: 1, x: 0, y: 0, z: 0 },
  timestamp: Date.now(),
};

// ── Run the agent ─────────────────────────────────────────────────────────────

async function main(): Promise<void> {
  console.log('GridStamp Proof-of-Presence Agent');
  console.log('==================================');
  console.log(`Robot:  ${ROBOT_ID}`);
  console.log(`Model:  claude-sonnet-4-6`);
  console.log(`Audit:  ./proof-audit.ndjson`);
  console.log('');

  // The agent calls this function when it invokes the read_sensor tool.
  // In production, replace with your camera driver (e.g. OAK-D, RealSense).
  let frameSeq = 1;
  const sensorReader = async (_sensorId: string): Promise<CameraFrame> => {
    return buildMockFrame(frameSeq++);
  };

  const result = await runProofAgent({
    robotId: ROBOT_ID,
    hmacSecret: HMAC_SECRET,
    sensorReader,
    expectedPose: EXPECTED_POSE,
    auditLogPath: './proof-audit.ndjson',
  });

  console.log('Attestation Result');
  console.log('------------------');
  console.log(`Status:          ${result.status}`);
  console.log(`Proof ID:        ${result.proofId}`);
  console.log(`Confidence:      ${(result.confidence * 100).toFixed(1)}%`);
  console.log(`Chain length:    ${result.chainLength}`);
  console.log(`Audit trail:     ${result.auditTrailPath}`);

  if (result.spoofingSignals.length > 0) {
    console.log('');
    console.log('Spoofing signals:');
    for (const signal of result.spoofingSignals) {
      console.log(`  • ${signal}`);
    }
  } else {
    console.log('Spoofing signals: none');
  }

  console.log('');
  console.log(`Exit: ${result.status === 'pass' ? 0 : 1}`);
  process.exitCode = result.status === 'pass' ? 0 : 1;
}

main().catch((err: unknown) => {
  console.error('Agent error:', err);
  process.exitCode = 1;
});