import { ClaudeBridge } from "../../channels/slack/bridge";
import { sendEmail } from "../../channels/email/send";

const TICKERS = [
  { symbol: "^GSPC", label: "S&P 500" },
  { symbol: "^IXIC", label: "Nasdaq" },
  { symbol: "^KS11", label: "KOSPI" },
  { symbol: "^TNX", label: "10Y Treasury Yield" },
  { symbol: "^VIX", label: "VIX" },
  { symbol: "CL=F", label: "Crude Oil (WTI)" },
  { symbol: "KRW=X", label: "USD/KRW" },
  { symbol: "BTC-USD", label: "Bitcoin" },
];

async function fetchTicker(symbol: string): Promise<{ price: number; prev: number; changePct: number } | null> {
  try {
    const url = `https://query1.finance.yahoo.com/v8/finance/chart/${encodeURIComponent(symbol)}?interval=1d&range=2d`;
    const res = await fetch(url, {
      headers: { "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36" },
    });
    if (!res.ok) return null;
    const data = (await res.json()) as any;
    const meta = data?.chart?.result?.[0]?.meta;
    if (!meta) return null;
    const price: number = meta.regularMarketPrice;
    const prev: number = meta.chartPreviousClose ?? meta.previousClose;
    if (!price || !prev) return null;
    const changePct = ((price - prev) / prev) * 100;
    return { price, prev, changePct };
  } catch {
    return null;
  }
}

async function fetchMarketData(): Promise<string> {
  const rows = await Promise.all(
    TICKERS.map(async ({ symbol, label }) => {
      const data = await fetchTicker(symbol);
      if (!data) return `${label}: unavailable`;
      const { price, changePct } = data;
      const sign = changePct >= 0 ? "+" : "";
      const priceStr = symbol === "KRW=X"
        ? price.toFixed(0)
        : symbol === "^VIX" || symbol === "^TNX"
        ? price.toFixed(2)
        : price.toLocaleString("en-US", { minimumFractionDigits: 2, maximumFractionDigits: 2 });
      return `${label}: ${priceStr} (${sign}${changePct.toFixed(2)}%)`;
    })
  );
  return rows.join("\n");
}

async function main() {
  console.log("[market-report] starting...");

  const now = new Date();
  const todayPST = now.toLocaleDateString("en-CA", { timeZone: "America/Los_Angeles" });
  const hourPST = Number(now.toLocaleString("en-US", { hour: "numeric", hour12: false, timeZone: "America/Los_Angeles" }));
  const lockFile = new URL(".last-sent", import.meta.url).pathname;

  const fs = await import("fs");
  if (fs.existsSync(lockFile) && fs.readFileSync(lockFile, "utf8").trim() === todayPST) {
    console.log(`[market-report] already sent today (${todayPST}), skipping`);
    process.exit(0);
  }

  if (hourPST < 5 || hourPST > 10) {
    console.log(`[market-report] outside send window (hour=${hourPST}), skipping stale catch-up`);
    process.exit(0);
  }

  const marketData = await fetchMarketData();
  console.log("[market-report] market data fetched");

  const dateStr = now.toLocaleDateString("en-US", {
    weekday: "long",
    year: "numeric",
    month: "long",
    day: "numeric",
    timeZone: "America/Los_Angeles",
  });
  const timeStr = now.toLocaleTimeString("en-US", {
    hour: "2-digit",
    minute: "2-digit",
    timeZone: "America/Los_Angeles",
    timeZoneName: "short",
  });

  const prompt = `You are Ace, managing Palace Fund LLC with Junwon. Write a daily pre-market report email in Markdown. Today is ${dateStr}, ${timeStr}.

Palace Fund context:
- California LLC, Buffett-style value investing
- Two members: Junwon (Managing Member, 100% control) + Sungho Park ($300K capital, 50% carry after 5% hurdle)
- Monitors: US equities, KOSPI, oil, FX (USD/KRW), macro

Guidelines:
- Direct, analytical. No fluff. No pleasantries beyond opening line.
- Lead with what matters most for the fund today.
- Flag any macro risks or sector moves relevant to value investing.
- Note any significant overnight news that moved markets.
- Keep it scannable — headers, bullets, bold for key numbers.
- End with 1-2 sentence "Watch Today" — what to monitor.

Sections:
1. ## Markets — use the data below, add brief context for each
2. ## Macro — key themes (rates, Fed, geopolitics, commodities)
3. ## Watch Today — 1-2 sentences on what to monitor

---

MARKET DATA:
${marketData}`;

  console.log("[market-report] calling Claude...");
  const bridge = new ClaudeBridge();
  bridge.channel = "market-report";
  bridge.model = "sonnet";
  const reportMd = await bridge.send(prompt);
  bridge.kill();

  const subject = `Palace Fund Market Report — ${dateStr}`;
  await sendEmail("ace@palace.fund", {
    to: "junwon@manglasabang.com",
    subject,
    markdown: reportMd,
    footer: `Palace Fund LLC · Daily Market Report · ${dateStr}`,
  });

  fs.writeFileSync(lockFile, todayPST);
  console.log(`[market-report] sent: ${subject}`);
}

main().catch((err) => {
  console.error("[market-report] fatal:", err);
  process.exit(1);
});