import crypto from 'node:crypto';
import fs from 'node:fs';
import http from 'node:http';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const SCRIPT_DIR = path.dirname(fileURLToPath(import.meta.url));
const PROJECT_ROOT = path.resolve(SCRIPT_DIR, '..', '..');
const TOKENS_DIR = path.join(PROJECT_ROOT, 'tokens');

function readJsonFile(filePath) {
  try {
    const raw = fs.readFileSync(filePath, 'utf8');
    return JSON.parse(raw);
  } catch {
    return undefined;
  }
}

function getIsoNow() {
  return new Date().toISOString();
}

function base64Url(buf) {
  return Buffer.from(buf)
    .toString('base64')
    .replace(/=/g, '')
    .replace(/\+/g, '-')
    .replace(/\//g, '_');
}

function sha256Hex(text) {
  return crypto.createHash('sha256').update(text, 'utf8').digest('hex');
}

function generateToken() {
  return `alg_${base64Url(crypto.randomBytes(32))}`;
}

function getHeader(req, name) {
  const v = req.headers[String(name).toLowerCase()];
  return Array.isArray(v) ? v[0] : v;
}

function readBearerToken(req) {
  const auth = getHeader(req, 'authorization');
  if (auth && typeof auth === 'string') {
    const m = auth.match(/^Bearer\s+(.+)$/i);
    if (m && m[1]) return m[1].trim();
  }
  const apiKey = getHeader(req, 'x-api-key');
  if (apiKey && typeof apiKey === 'string' && apiKey.trim()) return apiKey.trim();
  return undefined;
}

function withCors(res, corsOrigin) {
  res.setHeader('access-control-allow-origin', corsOrigin);
  res.setHeader('access-control-allow-methods', 'GET,POST,OPTIONS');
  res.setHeader(
    'access-control-allow-headers',
    'content-type, authorization, x-api-key, x-admin-secret'
  );
}

function sendJson(res, status, body, corsOrigin) {
  withCors(res, corsOrigin);
  res.statusCode = status;
  res.setHeader('content-type', 'application/json; charset=utf-8');
  res.end(JSON.stringify(body));
}

async function readBodyJson(req, { maxBytes }) {
  const chunks = [];
  let total = 0;
  for await (const chunk of req) {
    total += chunk.length;
    if (total > maxBytes) throw new Error('payload_too_large');
    chunks.push(chunk);
  }
  const text = Buffer.concat(chunks).toString('utf8');
  if (!text.trim()) return {};
  try {
    return JSON.parse(text);
  } catch {
    throw new Error('invalid_json');
  }
}

function normalizeGraphqlName(value, fallback, label) {
  const v = String(value || fallback || '')
    .trim()
    .toLowerCase();
  if (!v) return String(fallback || '');
  if (!/^[a-z][a-z0-9_]*$/.test(v)) throw new Error(`Invalid ${label}: ${value}`);
  return v;
}

function resolveConfig() {
  const hasuraTokens = readJsonFile(path.join(TOKENS_DIR, 'hasura.json')) || {};
  const apiTokens = readJsonFile(path.join(TOKENS_DIR, 'api.json')) || {};

  const portRaw = process.env.PORT || process.env.API_PORT || apiTokens.port || '8787';
  const port = Number.parseInt(String(portRaw), 10);
  if (!Number.isInteger(port) || port <= 0) throw new Error(`Invalid PORT: ${portRaw}`);

  const hasuraUrl =
    process.env.HASURA_GRAPHQL_URL ||
    hasuraTokens.graphqlUrl ||
    hasuraTokens.apiUrl ||
    'http://localhost:8080/v1/graphql';

  const hasuraAdminSecret =
    process.env.HASURA_ADMIN_SECRET || hasuraTokens.adminSecret || hasuraTokens.hasuraAdminSecret;

  const apiAdminSecret = process.env.API_ADMIN_SECRET || apiTokens.adminSecret;

  const corsOrigin = process.env.CORS_ORIGIN || apiTokens.corsOrigin || '*';

  const appVersion = String(process.env.APP_VERSION || 'v1').trim() || 'v1';
  const buildTimestamp = String(process.env.BUILD_TIMESTAMP || '').trim() || undefined;
  const startedAt = getIsoNow();

  const ticksTable = normalizeGraphqlName(process.env.TICKS_TABLE, 'drift_ticks', 'TICKS_TABLE');
  const candlesFunction = normalizeGraphqlName(
    process.env.CANDLES_FUNCTION,
    'get_drift_candles',
    'CANDLES_FUNCTION'
  );

  return {
    port,
    hasuraUrl,
    hasuraAdminSecret,
    apiAdminSecret,
    corsOrigin,
    appVersion,
    buildTimestamp,
    startedAt,
    ticksTable,
    candlesFunction,
  };
}

async function hasuraRequest(cfg, { admin }, query, variables) {
  const headers = { 'content-type': 'application/json' };
  if (admin) {
    if (!cfg.hasuraAdminSecret) throw new Error('Missing HASURA_ADMIN_SECRET (or tokens/hasura.json adminSecret)');
    headers['x-hasura-admin-secret'] = cfg.hasuraAdminSecret;
  }

  const res = await fetch(cfg.hasuraUrl, {
    method: 'POST',
    headers,
    body: JSON.stringify({ query, variables }),
  });

  const text = await res.text();
  if (!res.ok) throw new Error(`Hasura HTTP ${res.status}: ${text}`);

  let json;
  try {
    json = JSON.parse(text);
  } catch {
    throw new Error(`Hasura invalid JSON: ${text}`);
  }
  if (json.errors?.length) {
    throw new Error(json.errors.map((e) => e.message).join(' | '));
  }
  return json.data;
}

function normalizeScopes(value) {
  if (!value) return [];
  if (Array.isArray(value)) return value.map((v) => String(v)).filter(Boolean);
  if (typeof value === 'string') {
    return value
      .split(',')
      .map((s) => s.trim())
      .filter(Boolean);
  }
  return [];
}

async function requireValidToken(cfg, req, requiredScope) {
  const token = readBearerToken(req);
  if (!token) return { ok: false, status: 401, error: 'missing_token' };

  const hash = sha256Hex(token);
  const query = `
    query ValidToken($hash: String!) {
      api_tokens(where: {token_hash: {_eq: $hash}, revoked_at: {_is_null: true}}, limit: 1) {
        id
        name
        scopes
      }
    }
  `;

  let data;
  try {
    data = await hasuraRequest(cfg, { admin: true }, query, { hash });
  } catch (err) {
    return { ok: false, status: 500, error: String(err?.message || err) };
  }

  const row = data?.api_tokens?.[0];
  if (!row?.id) return { ok: false, status: 401, error: 'invalid_or_revoked_token' };
  const scopes = normalizeScopes(row.scopes);
  if (requiredScope && !scopes.includes(requiredScope)) {
    return { ok: false, status: 403, error: 'missing_scope' };
  }

  // best-effort touch
  const touch = `
    mutation TouchToken($id: uuid!, $ts: timestamptz!) {
      update_api_tokens_by_pk(pk_columns: {id: $id}, _set: {last_used_at: $ts}) { id }
    }
  `;
  hasuraRequest(cfg, { admin: true }, touch, { id: row.id, ts: new Date().toISOString() }).catch(() => {});

  return { ok: true, token: { id: row.id, name: row.name } };
}

function toNumericString(value, fieldName) {
  if (value == null) throw new Error(`invalid_${fieldName}`);
  if (typeof value === 'number') {
    if (!Number.isFinite(value)) throw new Error(`invalid_${fieldName}`);
    return String(value);
  }
  if (typeof value === 'string') {
    const s = value.trim();
    if (!s) throw new Error(`invalid_${fieldName}`);
    const n = Number(s);
    if (!Number.isFinite(n)) throw new Error(`invalid_${fieldName}`);
    return s;
  }
  // best-effort: allow bigint-like or BN-like objects
  if (typeof value?.toString === 'function') {
    const s = String(value.toString()).trim();
    if (!s) throw new Error(`invalid_${fieldName}`);
    const n = Number(s);
    if (!Number.isFinite(n)) throw new Error(`invalid_${fieldName}`);
    return s;
  }
  throw new Error(`invalid_${fieldName}`);
}

function normalizeTick(input, tokenInfo) {
  const ts = (input?.ts || input?.timestamp || getIsoNow())?.toString?.();
  const market_index = input?.market_index ?? input?.marketIndex;
  const symbol = input?.symbol;
  const oracle_price = input?.oracle_price ?? input?.oraclePrice ?? input?.price;
  const mark_price = input?.mark_price ?? input?.markPrice ?? input?.mark;
  const oracle_slot = input?.oracle_slot ?? input?.oracleSlot ?? input?.slot;
  const source = (input?.source || 'api')?.toString?.();
  const raw = input?.raw && typeof input.raw === 'object' ? input.raw : undefined;

  if (!ts || Number.isNaN(Date.parse(ts))) throw new Error('invalid_ts');
  if (!Number.isInteger(market_index)) throw new Error('invalid_market_index');
  if (typeof symbol !== 'string' || !symbol.trim()) throw new Error('invalid_symbol');
  const oracleStr = toNumericString(oracle_price, 'oracle_price');
  const markStr = mark_price == null ? undefined : toNumericString(mark_price, 'mark_price');

  const slotNum =
    oracle_slot == null ? undefined : Number.isFinite(Number(oracle_slot)) ? Number(oracle_slot) : undefined;

  const mergedRaw =
    raw || tokenInfo
      ? {
          ...(raw || {}),
          ingestedBy: tokenInfo ? { tokenId: tokenInfo.id, name: tokenInfo.name } : undefined,
        }
      : undefined;

  return {
    ts,
    market_index,
    symbol: symbol.trim(),
    // Postgres columns are NUMERIC; Hasura `numeric` scalar returns strings and expects string inputs.
    oracle_price: oracleStr,
    mark_price: markStr,
    oracle_slot: slotNum,
    source,
    raw: mergedRaw,
  };
}

async function insertTick(cfg, tick) {
  const table = cfg.ticksTable;
  const insertField = `insert_${table}_one`;
  const mutation = `
    mutation InsertTick($object: ${table}_insert_input!) {
      ${insertField}(object: $object) {
        id
      }
    }
  `;

  const data = await hasuraRequest(cfg, { admin: true }, mutation, { object: tick });
  return data?.[insertField]?.id;
}

async function createApiToken(cfg, name, scopes, meta) {
  const mutation = `
    mutation CreateToken($name: String!, $hash: String!, $scopes: [String!]!, $meta: jsonb) {
      insert_api_tokens_one(object: {name: $name, token_hash: $hash, scopes: $scopes, meta: $meta}) {
        id
        name
        created_at
      }
    }
  `;

  for (let attempt = 0; attempt < 5; attempt++) {
    const token = generateToken();
    const hash = sha256Hex(token);
    try {
      const data = await hasuraRequest(cfg, { admin: true }, mutation, { name, hash, scopes, meta });
      const row = data?.insert_api_tokens_one;
      if (!row?.id) throw new Error('token_insert_failed');
      return { token, row };
    } catch (err) {
      const msg = String(err?.message || err);
      const isUniqueConflict = msg.toLowerCase().includes('unique') || msg.toLowerCase().includes('constraint');
      if (!isUniqueConflict) throw err;
    }
  }
  throw new Error('token_generation_failed');
}

async function revokeApiToken(cfg, id) {
  const mutation = `
    mutation RevokeToken($id: uuid!, $ts: timestamptz!) {
      update_api_tokens_by_pk(pk_columns: {id: $id}, _set: {revoked_at: $ts}) {
        id
        revoked_at
      }
    }
  `;
  const data = await hasuraRequest(cfg, { admin: true }, mutation, { id, ts: new Date().toISOString() });
  return data?.update_api_tokens_by_pk?.id;
}

function clampInt(value, min, max) {
  const n = Number.parseInt(String(value), 10);
  if (!Number.isFinite(n) || !Number.isInteger(n)) return min;
  return Math.min(max, Math.max(min, n));
}

function parseTimeframeToSeconds(tf) {
  const v = String(tf || '').trim().toLowerCase();
  if (!v) return 60;
  const m = v.match(/^(\d+)(s|m|h|d)$/);
  if (!m) throw new Error(`invalid_tf`);
  const num = Number.parseInt(m[1], 10);
  if (!Number.isInteger(num) || num <= 0) throw new Error(`invalid_tf`);
  const unit = m[2];
  const mult = unit === 's' ? 1 : unit === 'm' ? 60 : unit === 'h' ? 3600 : 86400;
  return num * mult;
}

function mean(values) {
  if (!values.length) return 0;
  return values.reduce((a, b) => a + b, 0) / values.length;
}

function stddev(values) {
  if (!values.length) return 0;
  const m = mean(values);
  const v = values.reduce((acc, x) => acc + (x - m) * (x - m), 0) / values.length;
  return Math.sqrt(v);
}

function sma(values, period) {
  if (period <= 0) throw new Error('period must be > 0');
  const out = new Array(values.length).fill(null);
  let sum = 0;
  for (let i = 0; i < values.length; i++) {
    sum += values[i];
    if (i >= period) sum -= values[i - period];
    if (i >= period - 1) out[i] = sum / period;
  }
  return out;
}

function ema(values, period) {
  if (period <= 0) throw new Error('period must be > 0');
  const out = new Array(values.length).fill(null);
  const k = 2 / (period + 1);
  if (values.length < period) return out;
  const first = mean(values.slice(0, period));
  out[period - 1] = first;
  let prev = first;
  for (let i = period; i < values.length; i++) {
    const next = values[i] * k + prev * (1 - k);
    out[i] = next;
    prev = next;
  }
  return out;
}

function rsi(values, period) {
  if (period <= 0) throw new Error('period must be > 0');
  const out = new Array(values.length).fill(null);
  if (values.length <= period) return out;

  let gains = 0;
  let losses = 0;
  for (let i = 1; i <= period; i++) {
    const change = values[i] - values[i - 1];
    if (change >= 0) gains += change;
    else losses -= change;
  }
  let avgGain = gains / period;
  let avgLoss = losses / period;

  const rs = avgLoss === 0 ? Number.POSITIVE_INFINITY : avgGain / avgLoss;
  out[period] = 100 - 100 / (1 + rs);

  for (let i = period + 1; i < values.length; i++) {
    const change = values[i] - values[i - 1];
    const gain = Math.max(change, 0);
    const loss = Math.max(-change, 0);
    avgGain = (avgGain * (period - 1) + gain) / period;
    avgLoss = (avgLoss * (period - 1) + loss) / period;
    const rs2 = avgLoss === 0 ? Number.POSITIVE_INFINITY : avgGain / avgLoss;
    out[i] = 100 - 100 / (1 + rs2);
  }

  return out;
}

function bollingerBands(values, period, stdDevMult) {
  if (period <= 0) throw new Error('period must be > 0');
  const upper = new Array(values.length).fill(null);
  const lower = new Array(values.length).fill(null);
  const mid = sma(values, period);

  for (let i = period - 1; i < values.length; i++) {
    const window = values.slice(i - period + 1, i + 1);
    const sd = stddev(window);
    const m = mid[i];
    if (m == null) continue;
    upper[i] = m + stdDevMult * sd;
    lower[i] = m - stdDevMult * sd;
  }

  return { upper, lower, mid };
}

function macd(values, fastPeriod = 12, slowPeriod = 26, signalPeriod = 9) {
  const fast = ema(values, fastPeriod);
  const slow = ema(values, slowPeriod);
  const macdLine = values.map((_, i) => {
    const f = fast[i];
    const s = slow[i];
    return f == null || s == null ? null : f - s;
  });

  const signal = new Array(values.length).fill(null);
  const k = 2 / (signalPeriod + 1);
  let seeded = false;
  let prev = 0;
  const buf = [];

  for (let i = 0; i < macdLine.length; i++) {
    const v = macdLine[i];
    if (v == null) continue;

    if (!seeded) {
      buf.push(v);
      if (buf.length === signalPeriod) {
        const first = mean(buf);
        signal[i] = first;
        prev = first;
        seeded = true;
      }
      continue;
    }

    const next = v * k + prev * (1 - k);
    signal[i] = next;
    prev = next;
  }

  return { macd: macdLine, signal };
}

function toSeries(times, values) {
  return times.map((t, i) => ({ time: t, value: values[i] ?? null }));
}

function isAdmin(cfg, req) {
  if (!cfg.apiAdminSecret) return false;
  const provided = getHeader(req, 'x-admin-secret');
  return typeof provided === 'string' && provided === cfg.apiAdminSecret;
}

async function handler(cfg, req, res) {
  if (req.method === 'OPTIONS') {
    withCors(res, cfg.corsOrigin);
    res.statusCode = 204;
    res.end();
    return;
  }

  const url = new URL(req.url || '/', `http://${req.headers.host || 'localhost'}`);
  const pathname = url.pathname;

  if (req.method === 'GET' && pathname === '/healthz') {
    sendJson(
      res,
      200,
      {
        ok: true,
        version: cfg.appVersion,
        buildTimestamp: cfg.buildTimestamp,
        startedAt: cfg.startedAt,
        ticksTable: cfg.ticksTable,
        candlesFunction: cfg.candlesFunction,
      },
      cfg.corsOrigin
    );
    return;
  }

  if (req.method === 'GET' && pathname === '/v1/chart') {
    const auth = await requireValidToken(cfg, req, 'read');
    if (!auth.ok) {
      sendJson(res, auth.status, { ok: false, error: auth.error }, cfg.corsOrigin);
      return;
    }

    const symbol = (url.searchParams.get('symbol') || '').trim();
    const source = (url.searchParams.get('source') || '').trim();
    const tf = (url.searchParams.get('tf') || url.searchParams.get('timeframe') || '1m').trim();
    const limit = clampInt(url.searchParams.get('limit') || '300', 10, 2000);

    if (!symbol) {
      sendJson(res, 400, { ok: false, error: 'missing_symbol' }, cfg.corsOrigin);
      return;
    }

    let bucketSeconds;
    try {
      bucketSeconds = parseTimeframeToSeconds(tf);
    } catch {
      sendJson(res, 400, { ok: false, error: 'invalid_tf' }, cfg.corsOrigin);
      return;
    }

    const fn = cfg.candlesFunction;
    const query = `
      query Candles($symbol: String!, $bucket: Int!, $limit: Int!, $source: String) {
        ${fn}(args: { p_symbol: $symbol, p_bucket_seconds: $bucket, p_limit: $limit, p_source: $source }) {
          bucket
          open
          high
          low
          close
          oracle_close
          ticks
        }
      }
    `;

    try {
      const data = await hasuraRequest(cfg, { admin: true }, query, {
        symbol,
        bucket: bucketSeconds,
        limit,
        source: source || null,
      });

      const rows = data?.[fn] || [];
      const candles = rows
        .slice()
        .reverse()
        .map((r) => {
          const time = Math.floor(Date.parse(r.bucket) / 1000);
          const open = Number(r.open);
          const high = Number(r.high);
          const low = Number(r.low);
          const close = Number(r.close);
          const oracle = r.oracle_close == null ? null : Number(r.oracle_close);
          const volume = Number(r.ticks || 0);
          return { time, open, high, low, close, volume, oracle };
        })
        .filter((c) => Number.isFinite(c.time) && Number.isFinite(c.open) && Number.isFinite(c.close));

      const times = candles.map((c) => c.time);
      const closes = candles.map((c) => c.close);
      const oracleSeries = toSeries(times, candles.map((c) => (c.oracle == null ? null : c.oracle)));

      const sma20 = toSeries(times, sma(closes, 20));
      const ema20 = toSeries(times, ema(closes, 20));
      const bb = bollingerBands(closes, 20, 2);
      const bbUpper = toSeries(times, bb.upper);
      const bbLower = toSeries(times, bb.lower);
      const bbMid = toSeries(times, bb.mid);
      const rsi14 = toSeries(times, rsi(closes, 14));
      const macdOut = macd(closes, 12, 26, 9);
      const macdLine = toSeries(times, macdOut.macd);
      const macdSignal = toSeries(times, macdOut.signal);

      sendJson(
        res,
        200,
        {
          ok: true,
          version: cfg.appVersion,
          buildTimestamp: cfg.buildTimestamp,
          ticksTable: cfg.ticksTable,
          candlesFunction: cfg.candlesFunction,
          symbol,
          source: source || null,
          tf,
          bucketSeconds,
          candles,
          indicators: {
            oracle: oracleSeries,
            sma20,
            ema20,
            bb20: { upper: bbUpper, lower: bbLower, mid: bbMid },
            rsi14,
            macd: { macd: macdLine, signal: macdSignal },
          },
        },
        cfg.corsOrigin
      );
    } catch (err) {
      sendJson(res, 500, { ok: false, error: String(err?.message || err) }, cfg.corsOrigin);
    }
    return;
  }

  if (req.method === 'POST' && pathname === '/v1/ingest/tick') {
    const auth = await requireValidToken(cfg, req, 'write');
    if (!auth.ok) {
      sendJson(res, auth.status, { ok: false, error: auth.error }, cfg.corsOrigin);
      return;
    }

    let body;
    try {
      body = await readBodyJson(req, { maxBytes: 1024 * 1024 });
    } catch (err) {
      const msg = String(err?.message || err);
      if (msg === 'payload_too_large') {
        sendJson(res, 413, { ok: false, error: 'payload_too_large' }, cfg.corsOrigin);
        return;
      }
      sendJson(res, 400, { ok: false, error: 'invalid_json' }, cfg.corsOrigin);
      return;
    }

    let tick;
    try {
      tick = normalizeTick(body, auth.token);
    } catch (err) {
      sendJson(res, 400, { ok: false, error: String(err?.message || err) }, cfg.corsOrigin);
      return;
    }

    try {
      const id = await insertTick(cfg, tick);
      sendJson(res, 200, { ok: true, id }, cfg.corsOrigin);
    } catch (err) {
      sendJson(res, 500, { ok: false, error: String(err?.message || err) }, cfg.corsOrigin);
    }
    return;
  }

  if (req.method === 'GET' && pathname === '/v1/ticks') {
    const auth = await requireValidToken(cfg, req, 'read');
    if (!auth.ok) {
      sendJson(res, auth.status, { ok: false, error: auth.error }, cfg.corsOrigin);
      return;
    }

    const symbol = url.searchParams.get('symbol') || '';
    const source = url.searchParams.get('source');
    const limitRaw = url.searchParams.get('limit') || '1000';
    const limit = Math.min(5000, Math.max(1, Number.parseInt(limitRaw, 10) || 1000));
    const from = url.searchParams.get('from');
    const to = url.searchParams.get('to');

    if (!symbol.trim()) {
      sendJson(res, 400, { ok: false, error: 'missing_symbol' }, cfg.corsOrigin);
      return;
    }

    const where = { symbol: { _eq: symbol.trim() } };
    if (source && source.trim()) where.source = { _eq: source.trim() };
    if (from || to) {
      where.ts = {};
      if (from) where.ts._gte = from;
      if (to) where.ts._lte = to;
    }

    const table = cfg.ticksTable;
    const query = `
      query Ticks($where: ${table}_bool_exp!, $limit: Int!) {
        ${table}(where: $where, order_by: {ts: desc}, limit: $limit) {
          ts
          market_index
          symbol
          oracle_price
          mark_price
          oracle_slot
          source
        }
      }
    `;

    try {
      const data = await hasuraRequest(cfg, { admin: true }, query, { where, limit });
      const ticks = (data?.[table] || []).slice().reverse();
      sendJson(res, 200, { ok: true, version: cfg.appVersion, ticksTable: cfg.ticksTable, ticks }, cfg.corsOrigin);
    } catch (err) {
      sendJson(res, 500, { ok: false, error: String(err?.message || err) }, cfg.corsOrigin);
    }
    return;
  }

  if (req.method === 'POST' && pathname === '/v1/admin/tokens') {
    if (!isAdmin(cfg, req)) {
      sendJson(res, 401, { ok: false, error: 'admin_unauthorized' }, cfg.corsOrigin);
      return;
    }

    let body;
    try {
      body = await readBodyJson(req, { maxBytes: 1024 * 1024 });
    } catch {
      sendJson(res, 400, { ok: false, error: 'invalid_json' }, cfg.corsOrigin);
      return;
    }

    const name = (body?.name || 'algo')?.toString?.().trim();
    if (!name) {
      sendJson(res, 400, { ok: false, error: 'missing_name' }, cfg.corsOrigin);
      return;
    }
    const scopes = normalizeScopes(body?.scopes);
    const resolvedScopes = scopes.length ? scopes : ['write'];

    try {
      const { token, row } = await createApiToken(cfg, name, resolvedScopes, body?.meta);
      sendJson(res, 200, { ok: true, token, id: row.id, name: row.name, created_at: row.created_at }, cfg.corsOrigin);
    } catch (err) {
      sendJson(res, 500, { ok: false, error: String(err?.message || err) }, cfg.corsOrigin);
    }
    return;
  }

  if (req.method === 'POST' && pathname === '/v1/admin/tokens/revoke') {
    if (!isAdmin(cfg, req)) {
      sendJson(res, 401, { ok: false, error: 'admin_unauthorized' }, cfg.corsOrigin);
      return;
    }

    let body;
    try {
      body = await readBodyJson(req, { maxBytes: 1024 * 1024 });
    } catch {
      sendJson(res, 400, { ok: false, error: 'invalid_json' }, cfg.corsOrigin);
      return;
    }

    const id = (body?.id || '')?.toString?.().trim();
    if (!id) {
      sendJson(res, 400, { ok: false, error: 'missing_id' }, cfg.corsOrigin);
      return;
    }

    try {
      const revokedId = await revokeApiToken(cfg, id);
      sendJson(res, 200, { ok: true, id: revokedId }, cfg.corsOrigin);
    } catch (err) {
      sendJson(res, 500, { ok: false, error: String(err?.message || err) }, cfg.corsOrigin);
    }
    return;
  }

  sendJson(res, 404, { ok: false, error: 'not_found' }, cfg.corsOrigin);
}

function main() {
  const cfg = resolveConfig();
  const server = http.createServer((req, res) => void handler(cfg, req, res));

  server.listen(cfg.port, () => {
    console.log(
      JSON.stringify(
        {
          service: 'trade-api',
          version: cfg.appVersion,
          buildTimestamp: cfg.buildTimestamp,
          port: cfg.port,
          hasuraUrl: cfg.hasuraUrl,
          ticksTable: cfg.ticksTable,
          candlesFunction: cfg.candlesFunction,
          hasuraAdminSecret: cfg.hasuraAdminSecret ? '***' : undefined,
          apiAdminSecret: cfg.apiAdminSecret ? '***' : undefined,
        },
        null,
        2
      )
    );
  });
}

main();