#!/usr/bin/env node
// plan.js, migration-plan CLI. Demonstrates the migration SDK (lib/migrate.js):
// derive a counterfactual PQC account address and print a step-by-step,
// honestly-caveated migration plan. Signs and broadcasts NOTHING.
//
//   node plan.js                                     demo (uses the sample Falcon key)
//   node plan.js --mode pqc --falcon 0x09.. --salt 0
//   node plan.js --mode hybrid --falcon 0x09.. --ecdsa 0xYourEoa
//   node plan.js --json

import { readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import { dirname, join } from 'node:path';
import { buildMigrationPlan, predictPqcAccountAddress, ADDRESSES } from './lib/migrate.js';

const __dirname = dirname(fileURLToPath(import.meta.url));

function loadSampleKey() {
  // The real Falcon-512 public key of the live sample account.
  // [CITED: aerenew/contracts/deployments/pqc-account.json sampleAccount.falconPubKey]
  const p = join(__dirname, '..', 'contracts', 'deployments', 'pqc-account.json');
  return JSON.parse(readFileSync(p, 'utf8')).sampleAccount.falconPubKey;
}

function parseArgs(argv) {
  const a = { mode: 'pqc', salt: 0 };
  for (let i = 0; i < argv.length; i++) {
    const t = argv[i];
    if (t === '--mode') a.mode = argv[++i];
    else if (t === '--falcon') a.falcon = argv[++i];
    else if (t === '--ecdsa') a.ecdsa = argv[++i];
    else if (t === '--salt') a.salt = parseInt(argv[++i], 10);
    else if (t === '--json') a.json = true;
    else if (t === '--help' || t === '-h') a.help = true;
  }
  return a;
}

function main() {
  const args = parseArgs(process.argv.slice(2));
  if (args.help) {
    console.log('node plan.js [--mode pqc|hybrid] [--falcon 0x09..] [--ecdsa 0x..] [--salt N] [--json]');
    return;
  }
  const falcon = args.falcon || loadSampleKey();
  const usingSample = !args.falcon;

  const plan = buildMigrationPlan({
    mode: args.mode,
    falconPubKey: falcon,
    ecdsaSigner: args.ecdsa,
    salt: args.salt,
  });

  if (args.json) {
    console.log(JSON.stringify(plan, null, 2));
    return;
  }

  console.log('');
  console.log(`Aere post-quantum migration plan  (mode: ${plan.mode})`);
  if (usingSample) console.log('  (demo: using the live sample account\'s real Falcon-512 key)');
  console.log('');
  if (args.mode === 'pqc') {
    const predicted = predictPqcAccountAddress({ falconPubKey: falcon, salt: args.salt });
    console.log(`  factory:            ${ADDRESSES.AerePQCAccountFactory.address}  (live)`);
    console.log(`  derived account:    ${predicted}`);
    console.log('');
  }
  for (const step of plan.steps) {
    console.log(`  Step ${step.n}. ${step.title}`);
    console.log(`     how:    ${step.how}`);
    if (step.result) console.log(`     result: ${step.result}`);
    if (step.identityId) console.log(`     identityId: ${step.identityId}`);
    if (step.calldata) console.log(`     calldata: ${step.calldata.slice(0, 42)}... (${(step.calldata.length - 2) / 2} bytes)`);
    if (step.note) console.log(`     note:   ${step.note}`);
    console.log('');
  }
  console.log('  Honest caveats:');
  for (const c of plan.caveats) console.log(`     - ${c}`);
  console.log('');
}

main();