import fs from 'node:fs';
import process from 'node:process';
import { setTimeout as sleep } from 'node:timers/promises';

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

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

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

function envList(name, fallbackCsv) {
  const raw = process.env[name] ?? fallbackCsv;
  return String(raw)
    .split(',')
    .map((s) => s.trim())
    .filter(Boolean);
}

function resolveConfig() {
  const tokensPath =
    process.env.HASURA_TOKENS_FILE ||
    process.env.TOKENS_FILE ||
    process.env.HASURA_CONFIG_FILE ||
    '/app/tokens/hasura.json';
  const tokens = readJsonFile(tokensPath) || {};

  const hasuraUrl =
    process.env.HASURA_GRAPHQL_URL ||
    tokens.graphqlUrl ||
    tokens.apiUrl ||
    'http://hasura:8080/v1/graphql';
  const hasuraAdminSecret =
    process.env.HASURA_ADMIN_SECRET ||
    process.env.HASURA_GRAPHQL_ADMIN_SECRET ||
    tokens.adminSecret ||
    tokens.hasuraAdminSecret;
  const hasuraAuthToken = process.env.HASURA_AUTH_TOKEN || process.env.HASURA_JWT || undefined;

  const dlobSource = String(process.env.DLOB_SOURCE || 'mevnode').trim() || 'mevnode';
  const markets = envList('DLOB_MARKETS', 'PUMP-PERP,SOL-PERP,1MBONK-PERP,BTC-PERP,ETH-PERP');
  const pollMs = clampInt(process.env.DLOB_TS_POLL_MS, 500, 60_000, 1000);

  return { hasuraUrl, hasuraAdminSecret, hasuraAuthToken, dlobSource, markets, pollMs };
}

async function graphqlRequest(cfg, query, variables) {
  const headers = { 'content-type': 'application/json' };
  if (cfg.hasuraAuthToken) {
    headers.authorization = `Bearer ${cfg.hasuraAuthToken}`;
  } else if (cfg.hasuraAdminSecret) {
    headers['x-hasura-admin-secret'] = cfg.hasuraAdminSecret;
  } else {
    throw new Error('Missing Hasura auth (set HASURA_AUTH_TOKEN or HASURA_ADMIN_SECRET or mount tokens/hasura.json)');
  }

  const res = await fetch(cfg.hasuraUrl, {
    method: 'POST',
    headers,
    body: JSON.stringify({ query, variables }),
    signal: AbortSignal.timeout(15_000),
  });
  const text = await res.text();
  if (!res.ok) throw new Error(`Hasura HTTP ${res.status}: ${text}`);
  const json = JSON.parse(text);
  if (json.errors?.length) {
    throw new Error(json.errors.map((e) => e.message).join(' | '));
  }
  return json.data;
}

function mapBigint(v) {
  if (v == null) return null;
  if (typeof v === 'number') return Number.isFinite(v) ? String(Math.trunc(v)) : null;
  if (typeof v === 'string') return v.trim() || null;
  return null;
}

async function main() {
  const cfg = resolveConfig();

  console.log(
    JSON.stringify(
      {
        service: 'dlob-ts-archiver',
        startedAt: getIsoNow(),
        hasuraUrl: cfg.hasuraUrl,
        hasuraAuth: cfg.hasuraAuthToken ? 'bearer' : cfg.hasuraAdminSecret ? 'admin-secret' : 'none',
        dlobSource: cfg.dlobSource,
        markets: cfg.markets,
        pollMs: cfg.pollMs,
      },
      null,
      2
    )
  );

  while (true) {
    const now = getIsoNow();

    try {
      const query = `
        query Latest($source: String!, $markets: [String!]!) {
          dlob_stats_latest(where: { source: { _eq: $source }, market_name: { _in: $markets } }) {
            market_name market_type market_index ts slot
            mark_price oracle_price best_bid_price best_ask_price mid_price
            spread_abs spread_bps depth_levels depth_bid_base depth_ask_base depth_bid_usd depth_ask_usd imbalance
            raw
          }
          dlob_depth_bps_latest(where: { source: { _eq: $source }, market_name: { _in: $markets } }) {
            market_name band_bps market_type market_index ts slot
            mid_price best_bid_price best_ask_price bid_base ask_base bid_usd ask_usd imbalance
            raw
          }
          dlob_slippage_latest(where: { source: { _eq: $source }, market_name: { _in: $markets } }) {
            market_name side size_usd market_type market_index ts slot
            mid_price vwap_price worst_price filled_usd filled_base impact_bps levels_consumed fill_pct
            raw
          }
          dlob_slippage_latest_v2(where: { source: { _eq: $source }, market_name: { _in: $markets } }) {
            market_name side size_usd market_type market_index ts slot
            mid_price vwap_price worst_price filled_usd filled_base impact_bps levels_consumed fill_pct
            raw
          }
        }
      `;

      const data = await graphqlRequest(cfg, query, { source: cfg.dlobSource, markets: cfg.markets });

      const statsRows = (data?.dlob_stats_latest || []).map((r) => ({
        ts: now,
        source: cfg.dlobSource,
        market_name: r.market_name,
        market_type: r.market_type,
        market_index: r.market_index ?? null,
        source_ts: mapBigint(r.ts),
        slot: mapBigint(r.slot),
        mark_price: r.mark_price ?? null,
        oracle_price: r.oracle_price ?? null,
        best_bid_price: r.best_bid_price ?? null,
        best_ask_price: r.best_ask_price ?? null,
        mid_price: r.mid_price ?? null,
        spread_abs: r.spread_abs ?? null,
        spread_bps: r.spread_bps ?? null,
        depth_levels: r.depth_levels ?? null,
        depth_bid_base: r.depth_bid_base ?? null,
        depth_ask_base: r.depth_ask_base ?? null,
        depth_bid_usd: r.depth_bid_usd ?? null,
        depth_ask_usd: r.depth_ask_usd ?? null,
        imbalance: r.imbalance ?? null,
        raw: r.raw ?? null,
      }));

      const depthRows = (data?.dlob_depth_bps_latest || []).map((r) => ({
        ts: now,
        source: cfg.dlobSource,
        market_name: r.market_name,
        band_bps: r.band_bps,
        market_type: r.market_type,
        market_index: r.market_index ?? null,
        source_ts: mapBigint(r.ts),
        slot: mapBigint(r.slot),
        mid_price: r.mid_price ?? null,
        best_bid_price: r.best_bid_price ?? null,
        best_ask_price: r.best_ask_price ?? null,
        bid_base: r.bid_base ?? null,
        ask_base: r.ask_base ?? null,
        bid_usd: r.bid_usd ?? null,
        ask_usd: r.ask_usd ?? null,
        imbalance: r.imbalance ?? null,
        raw: r.raw ?? null,
      }));

      const slippageRows = (data?.dlob_slippage_latest || []).map((r) => ({
        ts: now,
        source: cfg.dlobSource,
        market_name: r.market_name,
        side: r.side,
        size_usd: r.size_usd,
        market_type: r.market_type,
        market_index: r.market_index ?? null,
        source_ts: mapBigint(r.ts),
        slot: mapBigint(r.slot),
        mid_price: r.mid_price ?? null,
        vwap_price: r.vwap_price ?? null,
        worst_price: r.worst_price ?? null,
        filled_usd: r.filled_usd ?? null,
        filled_base: r.filled_base ?? null,
        impact_bps: r.impact_bps ?? null,
        levels_consumed: r.levels_consumed ?? null,
        fill_pct: r.fill_pct ?? null,
        raw: r.raw ?? null,
      }));

      const slippageRowsV2 = (data?.dlob_slippage_latest_v2 || []).map((r) => ({
        ts: now,
        source: cfg.dlobSource,
        market_name: r.market_name,
        side: r.side,
        size_usd: r.size_usd,
        market_type: r.market_type,
        market_index: r.market_index ?? null,
        source_ts: mapBigint(r.ts),
        slot: mapBigint(r.slot),
        mid_price: r.mid_price ?? null,
        vwap_price: r.vwap_price ?? null,
        worst_price: r.worst_price ?? null,
        filled_usd: r.filled_usd ?? null,
        filled_base: r.filled_base ?? null,
        impact_bps: r.impact_bps ?? null,
        levels_consumed: r.levels_consumed ?? null,
        fill_pct: r.fill_pct ?? null,
        raw: r.raw ?? null,
      }));

      const mutation = `
        mutation InsertTs(
          $stats: [dlob_stats_ts_insert_input!]!
          $depth: [dlob_depth_bps_ts_insert_input!]!
          $slip: [dlob_slippage_ts_insert_input!]!
          $slipV2: [dlob_slippage_ts_v2_insert_input!]!
        ) {
          insert_dlob_stats_ts(objects: $stats) { affected_rows }
          insert_dlob_depth_bps_ts(objects: $depth) { affected_rows }
          insert_dlob_slippage_ts(objects: $slip) { affected_rows }
          insert_dlob_slippage_ts_v2(objects: $slipV2) { affected_rows }
        }
      `;

      await graphqlRequest(cfg, mutation, { stats: statsRows, depth: depthRows, slip: slippageRows, slipV2: slippageRowsV2 });
    } catch (err) {
      console.error(`[dlob-ts-archiver] ${String(err?.message || err)}`);
    }

    await sleep(cfg.pollMs);
  }
}

main().catch((err) => {
  console.error(String(err?.stack || err));
  process.exitCode = 1;
});