import { MarketCallStore } from '../../calls/MarketCallStore.js';
import { ScreenerEngine } from '../../screener/ScreenerEngine.js';
import { YahooClient } from '../../market/YahooClient.js';
import { chunkArray } from '../../screener/Chunker.js';

const noopLogger = { write: () => {}, log: () => {}, warn: () => {} };
const store = new MarketCallStore();

// Takes a screener result entry and flattens it to a snapshot record
const toSnapshot = (r) => {
  if (!r) return null;
  const m = r.asset?.displayMetrics ?? r.asset?.getDisplayMetrics?.() ?? {};
  return {
    price: r.asset?.currentPrice ?? null,
    signal: r.signal ?? null,
    inflatedVerdict: r.inflated?.label ?? null,
    fundamentalVerdict: r.fundamental?.label ?? null,
    pe: m['P/E'] ?? null,
    roe: m['ROE%'] ?? null,
    fcf: m['FCF Yld%'] ?? null,
  };
};

export default async function callsRoutes(app) {
  // GET /api/calls — list all market calls (newest first)
  app.get('/api/calls', async () => {
    return { calls: store.list() };
  });

  // GET /api/calls/:id — get one call + enrich with current prices for comparison
  app.get('/api/calls/:id', async (req, reply) => {
    const call = store.get(req.params.id);
    if (!call) return reply.code(404).send({ error: 'Call not found' });

    // Re-screen the tickers to get current prices for comparison
    let current = {};
    if (call.tickers.length > 0) {
      try {
        const engine = new ScreenerEngine({ logger: noopLogger });
        const results = await engine.screenTickers(call.tickers);
        const all = [...results.STOCK, ...results.ETF, ...results.BOND];
        for (const r of all) {
          current[r.asset.ticker] = toSnapshot(r);
        }
      } catch {
        // Non-fatal — return call without current prices
      }
    }

    return { ...call, current };
  });

  // POST /api/calls — create a new market call and snapshot current prices
  app.post('/api/calls', {
    schema: {
      body: {
        type: 'object',
        required: ['title', 'quarter', 'thesis', 'tickers'],
        properties: {
          title: { type: 'string', minLength: 3 },
          quarter: { type: 'string', minLength: 2 },
          date: { type: 'string' },
          thesis: { type: 'string', minLength: 10 },
          tickers: { type: 'array', items: { type: 'string' }, minItems: 1, maxItems: 30 },
        },
      },
    },
    handler: async (req, reply) => {
      const { title, quarter, date, thesis, tickers } = req.body;
      const upperTickers = tickers.map((t) => t.toUpperCase());

      // Snapshot current screener data for each ticker
      let snapshot = {};
      try {
        const engine = new ScreenerEngine({ logger: noopLogger });
        const results = await engine.screenTickers(upperTickers);
        const all = [...results.STOCK, ...results.ETF, ...results.BOND];
        for (const r of all) {
          snapshot[r.asset.ticker] = toSnapshot(r);
        }
      } catch (err) {
        app.log.warn('Could not snapshot prices for market call:', err.message);
      }

      const call = store.create({ title, quarter, date, thesis, tickers: upperTickers, snapshot });
      return reply.code(201).send(call);
    },
  });

  // DELETE /api/calls/:id
  app.delete('/api/calls/:id', async (req, reply) => {
    const deleted = store.delete(req.params.id);
    if (!deleted) return reply.code(404).send({ error: 'Call not found' });
    return { ok: true };
  });

  // GET /api/calls/calendar?tickers=AAPL,MSFT  (or omit to use all call tickers)
  // Returns upcoming earnings dates, ex-dividend dates and dividend dates per ticker.
  // Fetched in parallel batches of 5 with rate-limit delay.
  app.get('/api/calls/calendar', async (req) => {
    const client = new YahooClient();

    // Resolve tickers: from query param, or aggregate all unique tickers across all calls
    let tickers;
    if (req.query.tickers) {
      tickers = req.query.tickers
        .split(',')
        .map((t) => t.trim().toUpperCase())
        .filter(Boolean);
    } else {
      const allCalls = store.list();
      const set = new Set(allCalls.flatMap((c) => c.tickers));
      tickers = [...set];
    }

    if (tickers.length === 0) return { events: [] };

    // Fetch calendarEvents in parallel batches
    const results = {};
    for (const batch of chunkArray(tickers, 5)) {
      await Promise.all(
        batch.map(async (ticker) => {
          const cal = await client.fetchCalendarEvents(ticker);
          if (cal) results[ticker] = cal;
        }),
      );
      await new Promise((r) => setTimeout(r, 500));
    }

    // Flatten into a sorted event list
    const events = [];
    const now = Date.now();

    for (const [ticker, cal] of Object.entries(results)) {
      // Upcoming earnings dates
      for (const dateVal of cal.earnings?.earningsDate ?? []) {
        const d = new Date(dateVal);
        events.push({
          ticker,
          type: 'earnings',
          date: d.toISOString().slice(0, 10),
          label: 'Earnings',
          detail: cal.earnings.isEarningsDateEstimate ? 'Estimated' : 'Confirmed',
          epsEstimate: cal.earnings.earningsAverage ?? null,
          revEstimate: cal.earnings.revenueAverage ?? null,
          isPast: d.getTime() < now,
        });
      }

      // Ex-dividend date
      if (cal.exDividendDate) {
        const d = new Date(cal.exDividendDate);
        events.push({
          ticker,
          type: 'exdividend',
          date: d.toISOString().slice(0, 10),
          label: 'Ex-Dividend',
          detail: null,
          isPast: d.getTime() < now,
        });
      }

      // Dividend payment date
      if (cal.dividendDate) {
        const d = new Date(cal.dividendDate);
        events.push({
          ticker,
          type: 'dividend',
          date: d.toISOString().slice(0, 10),
          label: 'Dividend',
          detail: null,
          isPast: d.getTime() < now,
        });
      }
    }

    // Sort: upcoming first, then past
    events.sort((a, b) => {
      if (a.isPast !== b.isPast) return a.isPast ? 1 : -1;
      return a.isPast
        ? new Date(b.date) - new Date(a.date) // most recent past first
        : new Date(a.date) - new Date(b.date); // soonest upcoming first
    });

    return { events, tickers };
  });
}