#!/usr/bin/env node
/**
 * deviant-web — local web UI for the Deviant wallet.
 *
 * Starts a localhost HTTP server that serves the SPA in `public/` and a
 * small JSON API backed by a real DeviantWallet (same core the CLI uses).
 *
 * Run: node --import tsx scripts/deviant-web.mjs
 * npm: npm run deviant:web
 *
 * Flags (same defaults as the CLI):
 *   --keys <path>     WIF keys file (default .chipnet-keys.json)
 *   --network <net>   chipnet | testnet4 | mainnet (default chipnet)
 *   --tokens <a,b>    token JSON files (default asm + asm2)
 *   --port <n>        listen port (default 8088)
 *
 * Binds to 127.0.0.1 only — never expose this off the machine; it can sign
 * and broadcast with the wallet's key.
 */
import { readFileSync, writeFileSync, existsSync, mkdirSync, readdirSync, rmSync } from 'node:fs';
import { join } from 'node:path';
import { TestNetWallet, Wallet } from 'mainnet-js';
import { InMemoryTokenRegistry } from '../src/token/registry.js';
import { tokenToPortable } from '../src/token/portable.js';
import { connectWallet, tokenFileToTierA } from '../src/wallet/runtime.js';
import { registerToken } from '../src/wallet/register.js';
import { startWebServer } from '../src/web/server.js';
import { parseArgs } from '../src/cli/wallet-cli.js';

const ROOT = join(import.meta.dirname, '..');
const TOKENS_DIR = join(ROOT, '.deviant', 'tokens');

// Load `.env` from the project root if present, so on-ramp keys/referral IDs
// (KYCNOT_API_KEY, TROCADOR_API_KEY, SIDESHIFT_AFFILIATE, …) reach process.env.
// Uses Node's built-in loader (v20.12+/v21.7+); silently skipped if absent.
const ENV_FILE = join(ROOT, '.env');
if (existsSync(ENV_FILE) && typeof process.loadEnvFile === 'function') {
  try { process.loadEnvFile(ENV_FILE); } catch { /* malformed .env — ignore */ }
}

async function main() {
  // deviant-web takes only flags (no command). Prepend a placeholder so the
  // flag parser doesn't consume the first `--flag` as the command slot.
  const { flags } = parseArgs(['web', ...process.argv.slice(2)]);
  const network = typeof flags.network === 'string' ? flags.network : 'chipnet';
  const port = typeof flags.port === 'string' ? Number(flags.port) : 8088;
  const keysPath = typeof flags.keys === 'string' ? flags.keys : join(ROOT, '.chipnet-keys.json');
  const tokenPaths = typeof flags.tokens === 'string'
    ? flags.tokens.split(',').map((p) => p.trim())
    : ['ChipnetTests/.chipnet-asm-token.json', 'ChipnetTests/.chipnet-asm2-token.json'].map((f) => join(ROOT, f));

  const registry = new InMemoryTokenRegistry();
  for (const p of tokenPaths) {
    const abs = p.startsWith('/') || /^[A-Za-z]:/.test(p) ? p : join(ROOT, p);
    if (existsSync(abs)) registry.add(tokenFileToTierA(JSON.parse(readFileSync(abs, 'utf8'))), 'replace');
  }
  // Persistent registered tokens (same dir the CLI's `register` writes to).
  if (existsSync(TOKENS_DIR)) {
    for (const f of readdirSync(TOKENS_DIR)) {
      if (!f.endsWith('.json')) continue;
      try {
        registerToken(JSON.parse(readFileSync(join(TOKENS_DIR, f), 'utf8')), registry, { policy: 'replace' });
      } catch (err) {
        console.error(`[warn] skipping ${f}: ${err?.message ?? err}`);
      }
    }
  }

  // Persist newly-registered tokens as portable JSON so they reload next run.
  const persistToken = (token) => {
    mkdirSync(TOKENS_DIR, { recursive: true });
    writeFileSync(join(TOKENS_DIR, `${token.id}.json`), JSON.stringify(tokenToPortable(token), null, 2));
  };
  // Drop a forgotten token's persisted file ("Convert to BCH" for Tier B).
  const forgetToken = (id) => {
    const f = join(TOKENS_DIR, `${id}.json`);
    if (existsSync(f)) rmSync(f);
  };

  const { wif } = JSON.parse(readFileSync(keysPath, 'utf8'));
  const w = network === 'mainnet' ? await Wallet.fromWIF(wif) : await TestNetWallet.fromWIF(wif);

  const wallet = connectWallet({
    registry,
    network,
    privateKey: w.privateKey,
    cashaddr: w.cashaddr,
    tokenAddress: w.tokenaddr,
    mainnetWallet: w, // enables asset creation (genesis)
  });

  startWebServer(
    {
      ctx: { wallet, registry, ownTokenAddress: w.tokenaddr },
      publicDir: join(ROOT, 'public'),
      walletInfo: { network, cashaddr: w.cashaddr, tokenAddress: w.tokenaddr },
      persistToken,
      forgetToken,
    },
    port,
  );

  console.log(`Deviant web UI → http://127.0.0.1:${port}  (${network}, ${w.cashaddr})`);
  console.log('Ctrl-C to stop.');
}

main().catch((err) => {
  console.error('FAILED:', err?.message ?? err);
  if (err?.stack) console.error(err.stack);
  process.exit(1);
});