'use strict';

/**
 * Internal ops endpoints (Session 18).
 *
 * Reachable only with the shared `VYNDR_INTERNAL_KEY` — never
 * exposed to end users. The admin dashboard wires the Tank01
 * prefetch button to POST here through the Next.js server (the
 * key never touches a browser).
 *
 * Deviation from spec: the spec suggested `execSync('node scripts/tank01-prefetch.js')`.
 * We import the module instead — same behavior, but in-process and
 * testable. The module already exposes `main(argv)` which returns
 * the same summary object the spec expected to parse out of stdout.
 */

const express = require('express');
const { requireInternalAuth } = require('../middleware/internalAuth');
const tank01Prefetch = require('../../scripts/tank01-prefetch');
const quotaTracker = require('../services/quotaTracker');

const router = express.Router();

router.use(requireInternalAuth({ loopbackOnly: false }));

/**
 * GET /api/internal/quota (Session 20)
 *
 * Snapshot of every configured provider's current quota counter.
 * Consumed by the admin dashboard's "Provider Quotas" tile. Cached
 * for 5s so a refresh-button mash doesn't flood Redis.
 */
router.get('/quota', async (req, res) => {
  try {
    const providers = await quotaTracker.getAllQuotaStatuses();
    res.set('Cache-Control', 'private, max-age=5');
    return res.json({ ok: true, providers });
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/quota] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

/**
 * POST /api/internal/prefetch/tank01
 *
 * Body (all optional):
 *   { max?: number, sports?: string[]|string, dryRun?: boolean }
 *
 * Builds an argv array equivalent to the CLI form and hands it to
 * the prefetch module. Returns the module's summary on success.
 */
router.post('/prefetch/tank01', async (req, res) => {
  const body = (req.body && typeof req.body === 'object') ? req.body : {};

  // Build argv. `main()` parses its own args, so all the validation
  // (numeric bounds, allowed sports) stays in one place — we just
  // translate JSON shapes into CLI flags.
  const argv = ['node', 'scripts/tank01-prefetch.js'];

  if (Number.isFinite(body.max) && body.max > 0) {
    argv.push(`--max=${Math.floor(body.max)}`);
  }
  if (body.dryRun === true) {
    argv.push('--dry-run');
  }
  if (body.sports) {
    const sportsList = Array.isArray(body.sports)
      ? body.sports.join(',')
      : String(body.sports);
    argv.push(`--sports=${sportsList}`);
  }

  try {
    const summary = await tank01Prefetch.main(argv);
    return res.json({ ok: true, summary });
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/prefetch/tank01] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

/**
 * POST /api/internal/snapshot/:sport (Session 45)
 *
 * Trigger one snapshot cycle for a sport (pre-grade the slate, lock grades,
 * compute deltas, emit ticker events). Internal-only (requireInternalAuth at the
 * router root). This is what the cron / n8n schedule calls — never public, so a
 * bad actor can't drain the PropLine quota by spamming it.
 */
/** POST /api/internal/snapshot/all — every active sport, sequentially.
 *  Registered BEFORE /snapshot/:sport so "all" isn't captured as a sport. */
router.post('/snapshot/all', async (req, res) => {
  const snapshot = require('../services/snapshotService');
  try {
    const results = await snapshot.runAllSnapshots();
    return res.json({ ok: true, results });
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/snapshot/all] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

/**
 * GET /api/internal/snapshot/status (Session 52) — verification probe. Reports
 * whether the in-process cron is armed, the freshest snapshot per sport, which
 * pipeline Redis keys exist, and the ticker item count. Read-only; safe to poll.
 * GET vs the POST /snapshot/:sport below — no route collision.
 */
router.get('/snapshot/status', async (req, res) => {
  const { cacheGet } = require('../utils/redis');
  const { HOURS_UTC, isSnapshotOverdue } = require('../snapshotScheduler');
  const SPORTS = ['mlb', 'nba', 'wnba'];
  try {
    const redis_keys = {};
    const last_snapshot = {};
    for (const sp of SPORTS) {
      const latestKey = `snapshot:${sp}:latest`;
      const prevKey = `snapshot:${sp}:previous`;
      const gradesKey = `grades:${sp}`;
      const [latest, prev, grades] = await Promise.all([cacheGet(latestKey), cacheGet(prevKey), cacheGet(gradesKey)]);
      redis_keys[latestKey] = !!latest;
      redis_keys[prevKey] = !!prev;
      redis_keys[gradesKey] = !!grades;
      if (latest) {
        last_snapshot[sp] = {
          updated_at: latest.updated_at || null,
          gradeCount: Array.isArray(latest.grades) ? latest.grades.length : 0,
          deltaCount: Array.isArray(latest.deltas) ? latest.deltas.length : 0,
        };
      }
    }
    const ticker = await cacheGet('ticker:items');
    redis_keys['ticker:items'] = !!ticker;
    // Session 56 — surface the missed-cron signal in the health probe.
    const mlbTs = last_snapshot.mlb && last_snapshot.mlb.updated_at;
    return res.json({
      cron_armed: process.env.SNAPSHOT_CRON === '1',
      cron_hours_utc: HOURS_UTC,
      last_snapshot,
      overdue: isSnapshotOverdue(mlbTs),
      redis_keys,
      ticker_count: Array.isArray(ticker) ? ticker.length : 0,
    });
  } catch (err) {
    return res.status(500).json({ ok: false, error: err.message });
  }
});

router.post('/snapshot/:sport', async (req, res) => {
  const snapshot = require('../services/snapshotService');
  try {
    const summary = await snapshot.runSnapshot(req.params.sport);
    return res.json({ ok: true, summary });
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/snapshot] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

/**
 * POST /api/internal/outcomes/all (Session 55) — settle every sport's latest
 * snapshot against real results + recompute the overall accuracy record. This
 * is the self-learning loop's write path (the public /api/accuracy is read-only).
 * Registered BEFORE /outcomes/:sport so "all" isn't captured as a sport.
 */
router.post('/outcomes/all', async (req, res) => {
  const outcomes = require('../services/outcomeService');
  try {
    const results = await outcomes.settleAllOutcomes();
    return res.json({ ok: true, results });
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/outcomes/all] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

/**
 * POST /api/internal/refresh/all (Session 60, Phase 2.5) — manual intraday
 * odds-only refresh: STEAM/VALUE movement, public revisions, closing
 * capture. Same behavior as the in-process 20-min cadence.
 */
router.post('/refresh/all', async (req, res) => {
  const refresh = require('../services/intradayRefreshService');
  try {
    const results = await refresh.runAllIntradayRefreshes();
    return res.json({ ok: true, results });
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/refresh/all] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

/**
 * POST /api/internal/ledger/settle (Session 58, Phase 1) — settle the
 * persistent ledger (outcome + actual_value + CLV) across every sport.
 * Idempotent — safe to re-run; already-settled rows are never touched.
 */
router.post('/ledger/settle', async (req, res) => {
  const ledger = require('../services/ledgerService');
  try {
    const results = await ledger.settleAllLedgers();
    return res.json({ ok: true, results });
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/ledger/settle] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

/**
 * POST /api/internal/newsletter/send (Session S7, a1) — assemble today's
 * VYNDR REPORT from the pipeline (snapshot signals + streak lens + the
 * ledger record) and send it as a Listmonk campaign to the opted-in list.
 *
 * DELIBERATELY UNSCHEDULED: nothing calls this on a timer. The operator
 * (or a future n8n cron, once Kev arms it) triggers the send. Env-gated —
 * without LISTMONK_* config it's a calm no-op; an empty report (zero
 * signals AND zero streaks) refuses to send.
 *
 * Body (optional): { sports?: string[] }  — defaults to ['mlb', 'wnba'].
 */
router.post('/newsletter/send', async (req, res) => {
  const newsletter = require('../services/newsletterService');
  const body = (req.body && typeof req.body === 'object') ? req.body : {};
  const sports = Array.isArray(body.sports) && body.sports.length > 0 ? body.sports : undefined;
  try {
    const result = await newsletter.sendDailyReport({ sports });
    return res.json(result);
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/newsletter/send] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

router.post('/outcomes/:sport', async (req, res) => {
  const outcomes = require('../services/outcomeService');
  try {
    const summary = await outcomes.settleSnapshot(req.params.sport);
    await outcomes.recomputeOverall();
    return res.json({ ok: true, summary: { sport: summary.sport, settled: summary.settled, pending: summary.pending, accuracy: summary.accuracy } });
  } catch (err) {
    const message = err && err.message ? err.message : String(err);
    console.error('[internal/outcomes] failed:', message);
    return res.status(500).json({ ok: false, error: message });
  }
});

module.exports = router;