import express from 'express';
import { Pool } from 'pg';
import helmet from 'helmet';
import rateLimit from 'express-rate-limit';
import { resolve } from 'node:path';
import { fileURLToPath } from 'node:url';
import { mkdir, open, unlink } from 'node:fs/promises';
import { z } from 'zod';
import { NETWORK, CONSENSUS } from '../../shared/testnet.ts';
import { transactionCardIds } from '../../shared/testnet.ts';
import { CHAIN_ID, blockSchema, tradeSchema, transferSchema, transactionSchema } from './consensus.ts';
import { RandomX } from './randomx.ts';
import { Ledger } from './ledger.ts';
import { PeerNetwork } from './peers.ts';
import { wikipediaEnrichment } from '../enrichment.ts';
import { snapshotStats } from '../../shared/enrichment.ts';
import { wikipediaArticles } from '../wiki.ts';
import { Market, marketConfig } from '../market/store.ts';
import { paymentMode } from '../market/payments.ts';
import { marketCommandSchema } from '../../shared/market.ts';
import { marketCommandV3Schema } from '../../shared/market-v3.ts';
import { custodyCommandSchema } from '../../shared/custody.ts';
import { moneroDepositAddressRequestSchema } from '../../shared/monero-deposit.ts';
import { mainnetCustodyBalanceRequestSchema, mainnetWithdrawalRequestSchema,
  mainnetWithdrawalCancellationSchema } from '../../shared/monero-withdrawal.ts';
import { CustodyMarket, CustodyError, custodyMode } from '../market/custody.ts';
import { openCustodyStorage } from '../market/custody-storage.ts';
import { PostgresCustody } from '../market/postgres-custody.ts';
import { CanonicalObserver } from '../market/canonical-observer.ts';
import { enrollMoneroDepositAddress, type MainnetEnrollmentContext } from '../market/monero-deposit-enrollment.ts';
import { cancelMainnetWithdrawal, readMainnetCustodyBalance, reserveMainnetWithdrawal } from '../market/mainnet-withdrawal.ts';
import { verifyMainnetCustodyIdentity } from '../market/mainnet-custody-identity.ts';
import { createMoneroDepositAddressRpc, loadMoneroObserverConfig } from '../market/monero-observer.ts';
import { loadMoneroMtlsTransport, loadMoneroMtlsTransportConfig } from '../market/monero-mtls-transport.ts';
import { postgresConfig } from '../market/postgres-config.ts';
import { validateMarketPolicy } from '../market/policy.ts';
import { IS_MAINNET, IS_PILOT, PROFILE } from '../../shared/network.ts';
import { assertLaunchAllowed, launchManifest } from '../launch.ts';
import { resourceConfig, RpcBudget, RpcError } from '../resources.ts';
import { trustedProxies, operationsPort, startOperations } from '../operations.ts';

const root = fileURLToPath(new URL('../../', import.meta.url));
assertLaunchAllowed();
const marketRuntimeSetting = process.env.WIKIDECK_MARKET_RUNTIME_ENABLED ?? '0';
if (marketRuntimeSetting !== '0' && marketRuntimeSetting !== '1') {
  throw new Error('WIKIDECK_MARKET_RUNTIME_ENABLED must be exactly 0 or 1');
}
const marketRuntimeEnabled = marketRuntimeSetting === '1';
const custodyConfig = custodyMode(); // Explicit opt-in sandbox only. Unknown/live modes fail before opening resources.
paymentMode(); // Keep real-payment modes fail-closed even when the optional market runtime is off.
let paymentConfig: ReturnType<typeof marketConfig> | undefined;
if (marketRuntimeEnabled || custodyConfig === 'sandbox') {
  paymentConfig = marketConfig();
  await validateMarketPolicy(paymentConfig); // Reject invalid recipient checksum/network before opening node resources.
}
const canonicalObserverMode = process.env.WIKIDECK_CUSTODY_CANONICAL_REHEARSAL;
if (canonicalObserverMode !== undefined && canonicalObserverMode !== '0' && canonicalObserverMode !== '1') {
  throw new Error('WIKIDECK_CUSTODY_CANONICAL_REHEARSAL must be exactly 0 or 1');
}
const depositEnrollmentMode = process.env.WIKIDECK_MONERO_DEPOSIT_ENROLLMENT ?? '0';
if (depositEnrollmentMode !== '0' && depositEnrollmentMode !== '1') {
  throw new Error('WIKIDECK_MONERO_DEPOSIT_ENROLLMENT must be exactly 0 or 1');
}
if (depositEnrollmentMode === '1' && !IS_MAINNET) {
  throw new Error('Monero deposit enrollment requires the mainnet profile');
}
const withdrawalRequestMode = process.env.WIKIDECK_MONERO_WITHDRAWAL_REQUESTS ?? '0';
if (withdrawalRequestMode !== '0' && withdrawalRequestMode !== '1') {
  throw new Error('WIKIDECK_MONERO_WITHDRAWAL_REQUESTS must be exactly 0 or 1');
}
if (withdrawalRequestMode === '1' && !IS_MAINNET) {
  throw new Error('Monero withdrawal requests require the mainnet profile');
}
if (canonicalObserverMode === '1' && (process.env.NODE_ENV === 'production' || custodyConfig !== 'sandbox' ||
  process.env.WIKIDECK_CUSTODY_STORAGE !== 'postgres' || process.env.WIKIDECK_PG_DISPOSABLE_TEST !== '1')) {
  throw new Error('Canonical observer rehearsal requires sandbox custody, PostgreSQL, and disposable test isolation');
}
const limits = resourceConfig();
const proxyTrust=trustedProxies();
const opsPort=operationsPort();
const apiBudget = new RpcBudget(limits);
const peerBudget = new RpcBudget({ ...limits, requestsPerSecond: 40, writesPerSecond: 10, active: 16 });
const dataDir = process.env.WIKIDECK_DATA_DIR ?? resolve(root,'data');
await mkdir(dataDir,{recursive:true});
// Never permit two processes to rewrite the same ledger. A stale lock requires operator review.
const lockPath = resolve(dataDir,`${PROFILE}-node.lock`);
const lock = await open(lockPath,'wx',0o600).catch(()=>{throw new Error('Data directory locked. Stop its other node; remove stale testnet-node.lock only after verifying no node is running.');});
await lock.writeFile(String(process.pid));
let engine: RandomX;
try { engine = new RandomX(); }
catch(e) { await lock.close();await unlink(lockPath);throw e; }
let ledger: Ledger;
try { ledger = await Ledger.open(dataDir,engine); }
catch(e) {engine.close();await lock.close();await unlink(lockPath);throw e;}
let peers: PeerNetwork;
try { peers = new PeerNetwork({ ledger, urls:(process.env.WIKIDECK_PEERS ?? '').split(',').map(s=>s.trim()).filter(Boolean),
  allowPrivate:process.env.WIKIDECK_ALLOW_PRIVATE_PEERS === '1' }); }
catch(e) {ledger.close();engine.close();await lock.close();await unlink(lockPath);throw e;}
let market: Market | undefined;
try { if (marketRuntimeEnabled) market = await Market.open(dataDir, ledger, paymentConfig!, Date.now, { worker: true }); }
catch(e) {peers.close();ledger.close();engine.close();await lock.close();await unlink(lockPath);throw e;}
let custody: CustodyMarket | PostgresCustody | undefined;
let custodyObserver: CanonicalObserver | undefined;
let moneroDepositPool: Pool | undefined;
let moneroDepositRpc: ReturnType<typeof createMoneroDepositAddressRpc> | undefined;
let moneroDepositContext: MainnetEnrollmentContext | undefined;
let moneroWithdrawalPool: Pool | undefined;
let moneroWithdrawalCustodianId: string | undefined;
try {
  if (custodyConfig === 'sandbox') custody = await openCustodyStorage(dataDir, { ...paymentConfig!,
    card: (hash, owner, sequence) => {
      const nft = ledger.nft(hash);
      if (!nft || nft.owner !== owner || nft.confirmations < CONSENSUS.coinbaseMaturity || nft.sequence !== sequence ||
        ledger.pendingTransactions().some(tx => transactionCardIds(tx).includes(hash))) return undefined;
      return { title: nft.block.article.title };
    } });
  if (canonicalObserverMode === '1') {
    if (!(custody instanceof PostgresCustody)) throw new Error('Canonical observer rehearsal requires PostgreSQL custody');
    custodyObserver = new CanonicalObserver(custody, ledger);
    if ((await custodyObserver.start()).state !== 'running') throw new Error('Canonical observer rehearsal failed to start; inspect custody diagnostics');
  }
  if (depositEnrollmentMode === '1') {
    const custodianId = z.string().uuid().parse(process.env.WIKIDECK_MONERO_CUSTODIAN_ID);
    const walletGenerationId = z.string().uuid().parse(process.env.WIKIDECK_MONERO_WALLET_GENERATION_ID);
    const expectedFingerprint = z.string().regex(/^[a-f0-9]{64}$/).parse(process.env.WIKIDECK_MONERO_WALLET_FINGERPRINT);
    const accountText = process.env.WIKIDECK_MONERO_DEPOSIT_ACCOUNT_INDEX;
    if (!accountText || !/^(0|[1-9]\d{0,9})$/.test(accountText) || Number(accountText) > 0xffff_ffff) {
      throw new Error('Invalid configured Monero deposit account index');
    }
    const observerConfig = await loadMoneroObserverConfig({ ...process.env, WIKIDECK_MONERO_OBSERVER: '1' });
    const mtlsConfig = await loadMoneroMtlsTransportConfig();
    if (new URL(observerConfig.url).href !== new URL(mtlsConfig.url).href) {
      throw new Error('Monero observer and mTLS gateway endpoints do not match');
    }
    const transport = await loadMoneroMtlsTransport(mtlsConfig);
    moneroDepositRpc = createMoneroDepositAddressRpc(observerConfig, transport);
    const actualFingerprint = await moneroDepositRpc.verifyWallet();
    if (actualFingerprint !== expectedFingerprint) throw new Error('Configured Monero wallet fingerprint does not match the protected wallet');
    const allocatorUrlFile = process.env.WIKIDECK_MONERO_ALLOCATOR_PG_URL_FILE;
    const allocatorCaFile = process.env.WIKIDECK_MONERO_ALLOCATOR_PG_CA_FILE;
    if (!allocatorUrlFile || !allocatorCaFile) throw new Error('Monero deposit allocator PostgreSQL URL and CA files are required');
    moneroDepositPool = new Pool(await postgresConfig({ WIKIDECK_CUSTODY_PG_URL_FILE: allocatorUrlFile,
      WIKIDECK_CUSTODY_PG_CA_FILE: allocatorCaFile, WIKIDECK_CUSTODY_PG_TRANSPORT: 'tls' }));
    moneroDepositPool.on('error', () => console.error('Monero deposit allocator database unavailable.'));
    await moneroDepositPool.query('SELECT 1 FROM wk_custody.monero_deposit_allocations LIMIT 0');
    moneroDepositContext = { custodianId, chainId: CHAIN_ID, walletGenerationId, walletFingerprint: actualFingerprint,
      accountIndex: Number(accountText) };
  }
  if (withdrawalRequestMode === '1') {
    moneroWithdrawalCustodianId = z.string().uuid().parse(process.env.WIKIDECK_MONERO_WITHDRAWAL_CUSTODIAN_ID);
    const urlFile = process.env.WIKIDECK_MONERO_WITHDRAWAL_PG_URL_FILE;
    const caFile = process.env.WIKIDECK_MONERO_WITHDRAWAL_PG_CA_FILE;
    if (!urlFile || !caFile) throw new Error('Monero withdrawal request PostgreSQL URL and CA files are required');
    moneroWithdrawalPool = new Pool(await postgresConfig({ WIKIDECK_CUSTODY_PG_URL_FILE: urlFile,
      WIKIDECK_CUSTODY_PG_CA_FILE: caFile, WIKIDECK_CUSTODY_PG_TRANSPORT: 'tls' }));
    moneroWithdrawalPool.on('error', () => console.error('Monero withdrawal request database unavailable.'));
    await verifyMainnetCustodyIdentity(moneroWithdrawalPool, moneroWithdrawalCustodianId);
    await moneroWithdrawalPool.query('SELECT 1 FROM wk_custody.monero_withdrawal_intents LIMIT 0');
  }
} catch(e) {await moneroWithdrawalPool?.end();await moneroDepositPool?.end();await custodyObserver?.close();await custody?.close();await market?.close();peers.close();ledger.close();engine.close();await lock.close();await unlink(lockPath);throw e;}
const app = express();
app.disable('x-powered-by');
if(proxyTrust.length)app.set('trust proxy',proxyTrust);
app.use(helmet({contentSecurityPolicy:{directives:{defaultSrc:["'self'"],scriptSrc:["'self'"],
  imgSrc:["'self'",'data:','https://upload.wikimedia.org','https://thumb.wikimedia.org'],styleSrc:["'self'","'unsafe-inline'"],
  connectSrc:["'self'"],upgradeInsecureRequests:null}},crossOriginEmbedderPolicy:false,
  strictTransportSecurity:process.env.NODE_ENV==='production'}));
app.get('/healthz',(_req,res)=>{res.setHeader('Cache-Control','no-store');res.json({status:'ok',network:NETWORK});});
// Admission comes before body parsing and signature/schema work. Disable compressed request inflation.
app.use('/api',apiBudget.middleware());
app.use('/p2p',peerBudget.middleware());
app.use(['/api','/p2p'],rateLimit({windowMs:60000,limit:300,standardHeaders:'draft-8',legacyHeaders:false}));
app.use(['/api','/p2p'],(req,res,next)=>{
  res.setHeader('Cache-Control','no-store');
  if(req.method==='POST') {
    if(!req.is('application/json')){res.status(415).json({error:'JSON required'});return;}
    const origin=req.get('origin');
    const allowed=new Set(['http://127.0.0.1:5173','http://localhost:5173','http://127.0.0.1:3001','http://localhost:3001',process.env.PUBLIC_ORIGIN]);
    if(origin&&!allowed.has(origin)){res.status(403).json({error:'Origin not allowed'});return;}
  }
  next();
});
app.use(['/api','/p2p'],express.json({limit:'68kb',strict:true,inflate:false}));
app.get('/api/state',(_req,res)=>res.json(ledger.legacySnapshot(limits.legacyBlocks)));
app.get('/api/summary',(_req,res)=>res.json(ledger.summary()));
app.get('/api/canonical',(req,res)=>{
  const q=z.object({tip:z.string().regex(/^[a-f0-9]{64}$/),offset:z.string().regex(/^\d{1,12}$/).optional(),
    limit:z.string().regex(/^\d{1,2}$/).optional()}).strict().parse(req.query);
  res.json(ledger.canonicalPage(q.tip,Number(q.offset??0),Number(q.limit??16)));
});
app.get('/api/network',(_req,res)=>res.json(launchManifest()));
app.get('/api/chain',(_req,res)=>res.json(ledger.legacySnapshot(limits.legacyBlocks)));
app.get('/api/peers',(_req,res)=>res.json({peers:peers.status()}));
if (market) {
app.get('/api/market', (req,res)=>res.json(market!.browse(Number(req.query.offset ?? 0))));
app.post('/api/market/command',rateLimit({windowMs:60000,limit:60,standardHeaders:'draft-8',legacyHeaders:false}),async(req,res)=>{
  const current = marketCommandV3Schema.safeParse(req.body);
  const command = current.success ? current.data : marketCommandSchema.parse(req.body);
  try {
    const result = await market!.execute(command);
    res.json(result);
    if(command.action.type==='deliver')void peers.broadcastTransfer(command.action.transfer).catch(()=>{});
  } catch(error) {
    if(error instanceof RpcError)throw error;
    // Marketplace storage/payment internals must never leak through the generic node error handler.
    if(error instanceof Error && !/SQLITE|constraint|database/i.test(error.message))res.status(400).json({error:error.message.slice(0,200)});
    else res.status(409).json({error:'Marketplace state conflict. Refresh and retry.'});
  }
});
}
app.get('/api/custody', async (req,res)=> {
  if (!custody) { res.json({ enabled: false }); return; }
  try { res.json(await custody.browse(Number(req.query.offset ?? 0))); }
  catch (error) {
    if (error instanceof CustodyError) res.status(400).json({ error: error.message });
    else res.status(503).json({ error: 'Custody sandbox unavailable; operator review required.' });
  }
});
app.post('/api/custody/command', rateLimit({windowMs:60000,limit:30,standardHeaders:'draft-8',legacyHeaders:false}), async (req,res)=> {
  if (!custody) { res.status(503).json({ error: 'Custody sandbox is disabled on this host.' }); return; }
  const parsed = custodyCommandSchema.safeParse(req.body);
  if (!parsed.success) { res.status(400).json({ error: 'Invalid custody command schema.' }); return; }
  try { res.json(await custody.execute(parsed.data)); }
  catch (error) {
    if (error instanceof CustodyError) res.status(400).json({ error: error.message });
    else res.status(503).json({ error: 'Custody state conflict; refresh activity before retrying. Operator review may be required.' });
  }
});
if (depositEnrollmentMode === '1' && moneroDepositContext && moneroDepositRpc && moneroDepositPool) {
  app.get('/api/monero/deposit-config', (_req,res) => {
    res.json({ network: 'wikideck-randomx-mainnet-1', chainId: moneroDepositContext!.chainId,
      custodianId: moneroDepositContext!.custodianId, walletGenerationId: moneroDepositContext!.walletGenerationId,
      walletFingerprint: moneroDepositContext!.walletFingerprint, accountIndex: moneroDepositContext!.accountIndex,
      addressEnrollmentEnabled: true, depositCreditEnabled: false, withdrawalsEnabled: false });
  });
  app.post('/api/monero/deposit-address', rateLimit({windowMs:60000,limit:5,standardHeaders:'draft-8',legacyHeaders:false}), async (req,res) => {
    const parsed = moneroDepositAddressRequestSchema.safeParse(req.body);
    if (!parsed.success) { res.status(400).json({ error: 'Invalid signed Monero deposit-address request.' }); return; }
    try {
      const result = await enrollMoneroDepositAddress(moneroDepositPool!, moneroDepositRpc!, moneroDepositContext!, parsed.data);
      res.json({ ...result, status: 'address-enrolled-not-credited', depositCreditEnabled: false, withdrawalsEnabled: false });
    } catch {
      res.status(409).json({ error: 'Deposit address enrollment failed; verify signed terms and retry with the same request ID.' });
    }
  });
}
if (withdrawalRequestMode === '1' && moneroWithdrawalPool && moneroWithdrawalCustodianId) {
  app.get('/api/monero/withdrawal-config', (_req,res) => {
    res.json({ network: 'wikideck-randomx-mainnet-1', chainId: CHAIN_ID,
      custodianId: moneroWithdrawalCustodianId, withdrawalRequestsEnabled: true,
      transactionSigningEnabled: false, transactionRelayEnabled: false });
  });
  app.post('/api/monero/custody-balance', rateLimit({windowMs:60000,limit:20,standardHeaders:'draft-8',legacyHeaders:false}), async (req,res) => {
    const parsed = mainnetCustodyBalanceRequestSchema.safeParse(req.body);
    if (!parsed.success) { res.status(400).json({ error: 'Invalid signed mainnet custody balance request.' }); return; }
    try { res.json(await readMainnetCustodyBalance(moneroWithdrawalPool!, parsed.data)); }
    catch { res.status(403).json({ error: 'Mainnet custody balance is unavailable for this signed request.' }); }
  });
  app.post('/api/monero/withdrawals', rateLimit({windowMs:60000,limit:5,standardHeaders:'draft-8',legacyHeaders:false}), async (req,res) => {
    const parsed = mainnetWithdrawalRequestSchema.safeParse(req.body);
    if (!parsed.success) { res.status(400).json({ error: 'Invalid signed mainnet withdrawal request.' }); return; }
    try {
      const result = await reserveMainnetWithdrawal(moneroWithdrawalPool!, parsed.data);
      res.status(202).json({ ...result, status: result.status === 'reserved' ? 'reserved-not-sent' : result.status,
        transactionSigningEnabled: false, transactionRelayEnabled: false });
    } catch {
      res.status(409).json({ error: 'Withdrawal request could not be reserved; verify signed terms and available balance.' });
    }
  });
  app.post('/api/monero/withdrawals/cancel', rateLimit({windowMs:60000,limit:5,standardHeaders:'draft-8',legacyHeaders:false}), async (req,res) => {
    const parsed = mainnetWithdrawalCancellationSchema.safeParse(req.body);
    if (!parsed.success) { res.status(400).json({ error: 'Invalid signed withdrawal cancellation.' }); return; }
    try {
      const result = await cancelMainnetWithdrawal(moneroWithdrawalPool!, parsed.data);
      res.json({ ...result, transactionSigningEnabled: false, transactionRelayEnabled: false });
    } catch {
      res.status(409).json({ error: 'Withdrawal cancellation could not be applied; it may already be cancelled or under operator processing.' });
    }
  });
}
app.get('/api/decks/:address', rateLimit({windowMs:60000,limit:60,standardHeaders:'draft-8',legacyHeaders:false}), (req,res)=>{
  if(typeof req.params.address!=='string'||!/^[a-f0-9]{64}$/.test(req.params.address)){
    res.status(400).json({error:'Invalid wallet address'});return;
  }
  const offset=Number(req.query.offset??0),limit=Number(req.query.limit??24);
  if(!Number.isSafeInteger(offset)||offset<0||!Number.isSafeInteger(limit)||limit<1||limit>24){
    res.status(400).json({error:'Invalid deck page'});return;
  }
  res.setHeader('Cache-Control','no-store');
  if(req.query.tip!==undefined && req.query.tip!==ledger.summary().tip){
    res.status(409).json({error:'Canonical tip changed; restart deck pagination.'});return;
  }
  res.json(ledger.deck(req.params.address,offset,limit));
});
// Optional live data is intentionally not used by genesis, block validation or NFT ownership.
app.get('/api/wikipedia/:pageId', rateLimit({windowMs:60000,limit:60,standardHeaders:'draft-8',legacyHeaders:false}), async(req,res)=>{
  if(typeof req.params.pageId!=='string'||!/^[1-9]\d{0,9}$/.test(req.params.pageId)){res.status(400).json({error:'Invalid Wikipedia page ID'});return;}
  const pageId=Number(req.params.pageId);
  try {res.json(await wikipediaEnrichment.get(pageId));}
  catch {res.status(503).json({error:'Wikipedia enrichment is temporarily unavailable. NFT data is unaffected.'});}
});
app.get('/p2p/status',(_req,res)=>res.json(ledger.peerStatus()));
app.get('/p2p/blocks',(req,res)=>{
  const offset=Number(req.query.offset??0);
  if(!Number.isSafeInteger(offset)||offset<0){res.status(400).json({error:'Invalid offset'});return;}
  const blocks=ledger.inventory(offset,32);
  res.json({blocks,next:offset+blocks.length<ledger.size?offset+blocks.length:null});
});
app.get('/p2p/mempool',(_req,res)=>res.json({transactions:ledger.pendingTransactions()}));
app.get('/api/nfts/:id', (req,res)=>{
  if(typeof req.params.id!=='string'||!/^[a-f0-9]{64}$/.test(req.params.id)){
    res.status(400).json({error:'Invalid NFT identifier'});return;
  }
  const nft=ledger.nft(req.params.id);
  if(!nft){res.status(404).json({error:'NFT not found on the canonical chain'});return;}
  const block=nft.block;
  res.json({network:NETWORK,chainId:CHAIN_ID,tokenId:block.tokenId,owner:nft.owner,sequence:nft.sequence,blockHash:block.hash,
    confirmations:nft.confirmations,article:block.article,statsSnapshot:block.statsSnapshot,
    stateRoot:ledger.block(ledger.summary().tip)?.stateRoot});
});
const templateLimit=rateLimit({windowMs:60000,limit:20,standardHeaders:'draft-8',legacyHeaders:false});
app.post('/api/mining/template', templateLimit, async (req,res)=>{
  const body=z.object({owner:z.string().regex(/^[a-f0-9]{64}$/),publicKey:z.string().max(256)}).strict().parse(req.body);
  try {
    const article=await wikipediaArticles.random();
    const metrics=await wikipediaEnrichment.getFresh(article.pageId);
    res.json(ledger.template(body.owner,body.publicKey,article,snapshotStats(metrics)));
  } catch {
    res.status(503).json({error:'Could not prepare a Wikipedia article and current statistics. Retry shortly.'});
  }
});
const workLimit=rateLimit({windowMs:60000,limit:30,standardHeaders:'draft-8',legacyHeaders:false});
app.post(['/api/blocks','/p2p/block'],workLimit,async(req,res)=>{
  const block=blockSchema.parse(req.body);
  const result=await ledger.submit(block);
  res.status(result.accepted?201:200).json(result);
  if(result.accepted)void peers.broadcastBlock(block).catch(()=>{});
});
app.post('/api/transfer',workLimit,async(req,res)=>{
  const tx=transferSchema.parse(req.body);
  const id=await ledger.submitTransfer(tx);
  res.status(202).json({id,status:'pending',message:'Ownership changes only when this transaction is mined.'});
  void peers.broadcastTransfer(tx).catch(()=>{});
});
app.post('/api/trades',workLimit,async(req,res)=>{
  const trade=tradeSchema.parse(req.body);
  const id=await ledger.submitTransaction(trade);
  res.status(202).json({id,status:'pending',message:'The complete multi-card trade is pending; ownership changes atomically when it is mined.'});
  void peers.broadcastTransaction(trade).catch(()=>{});
});
app.post('/p2p/transaction',workLimit,async(req,res)=>{
  const transaction=transactionSchema.parse(req.body);
  const id=await ledger.submitTransaction(transaction);
  res.status(202).json({id,status:'pending'});
});
app.use(['/api','/p2p'],(_req,res)=>{res.status(404).json({error:'Unknown testnet endpoint'});});
app.use(express.static(resolve(root,'dist')));
app.get('/{*path}',(_req,res)=>res.sendFile(resolve(root,'dist/index.html')));
app.use((err:Error & {status?:number},_req:express.Request,res:express.Response,_next:express.NextFunction)=>{
  const input=err instanceof z.ZodError||err instanceof SyntaxError;
  const message=input?'Invalid request encoding':err.message;
  // No keys/passwords are accepted by any node endpoint.
  if(err instanceof RpcError&&err.status===503)res.setHeader('Retry-After','1');
  res.status(err instanceof RpcError?err.status:err.status===413?413:err.status===415?415:400).json({error:message.slice(0,200)});
});
const port=Number(process.env.PORT??3001),host=process.env.HOST??'127.0.0.1';
const server=app.listen(port,host,()=>{
  const a=server.address();console.log(`Wikideck RandomX ${IS_MAINNET?'mainnet candidate':IS_PILOT?'private pilot':'testnet'}: http://${host}:${typeof a==='object'&&a?a.port:port} · chain ${CHAIN_ID} · ${ledger.snapshot().blocks.length} blocks`);
  peers.start();
});
const operations=startOperations(opsPort,()=>({network:NETWORK,paymentMode:'mock',
  ledger:ledger.diagnostics(),native:engine.diagnostics(),
  peers:{configured:peers.status().length,connected:peers.status().filter(p=>p.connected).length},
  rpc:{api:apiBudget.status(),p2p:peerBudget.status()},market:market?.diagnostics() ?? { enabled:false },
  canonicalObserver:custodyObserver?.status(),
  custody: custody && 'diagnostics' in custody ? custody.diagnostics() : { backend: custody ? 'sqlite-sandbox' : 'off' }}),resolve(dataDir,PROFILE));
server.maxConnections=256;
server.headersTimeout=10000;
server.requestTimeout=15000;
server.keepAliveTimeout=5000;
server.setTimeout(30000,socket=>socket.destroy());
// Advance simulated payout/expiry state even when no browser is open. No real funds are sent.
let stopping=false;
let catchupPaused=false;
let catchupImmediate:NodeJS.Immediate|undefined;
let marketTimer:NodeJS.Timeout|undefined;
let marketCatchupTimer:NodeJS.Timeout|undefined;
// Drain durable catch-up without page-load dependence. Each pass is a smaller synchronous
// SQLite slice, then setImmediate yields so HTTP and peer work can run between passes.
const advanceMarketCatchup=()=>{
  catchupImmediate=undefined;
  if(!market||stopping||catchupPaused||market.isReconciliationWorkerBusy()||!market.hasReconciliationBacklog())return;
  if(market.isReconciliationWorkerFailed()){
    catchupPaused=true;console.error('Marketplace reconciliation worker failed; operator review required.');return;
  }
  try {market.browse();}
  catch {catchupPaused=true;console.error('Marketplace canonical catch-up paused; operator review required.');return;}
  if(market.hasReconciliationBacklog()&&!market.isReconciliationWorkerBusy()){
    catchupImmediate=setImmediate(advanceMarketCatchup);catchupImmediate.unref();
  }
};
if (market) {
  marketTimer=setInterval(()=>{try {market!.browse();}catch{console.error('Marketplace reconciliation failed; operator review required.');}},15000);
  marketTimer.unref();
  marketCatchupTimer=setInterval(()=>{
    if(!stopping&&!catchupPaused&&!catchupImmediate&&market!.hasReconciliationBacklog()){
      catchupImmediate=setImmediate(advanceMarketCatchup);catchupImmediate.unref();
    }
  },250);
  marketCatchupTimer.unref();
}
for(const signal of ['SIGTERM','SIGINT']as const)process.once(signal,()=>{
  if(stopping)return;stopping=true;peers.close();operations.close();if(marketTimer)clearInterval(marketTimer);if(marketCatchupTimer)clearInterval(marketCatchupTimer);
  if(catchupImmediate)clearImmediate(catchupImmediate);
  const observerDrain=custodyObserver?.close()??Promise.resolve();
  const timeout=setTimeout(()=>process.exit(1),25000);timeout.unref();
  server.close(async()=>{await observerDrain;await moneroWithdrawalPool?.end();await moneroDepositPool?.end();await custody?.close();await market?.close();ledger.close();engine.close();await lock.close();await unlink(lockPath).catch(()=>{});clearTimeout(timeout);process.exit(0);});
});
server.on('error',async()=>{stopping=true;if(marketTimer)clearInterval(marketTimer);if(marketCatchupTimer)clearInterval(marketCatchupTimer);if(catchupImmediate)clearImmediate(catchupImmediate);operations.close();peers.close();await custodyObserver?.close();await moneroWithdrawalPool?.end();await moneroDepositPool?.end();await custody?.close();await market?.close();ledger.close();engine.close();await lock.close();await unlink(lockPath).catch(()=>{});process.exit(1);});