/**
 * Background data refresh service
 * Updates prices, filings, and earnings data on a schedule
 */

import type { BrowserWindow } from "electron";
import type { Db } from "@mosaiciq/shared/db";
import { fetchQuote, fetchFilings } from "@mosaiciq/shared/data";
import { upsertCompany } from "@mosaiciq/shared/db";
import { listFilings } from "@mosaiciq/shared/db";

export interface DataRefreshOptions {
  priceInterval?: number; // minutes
  filingInterval?: number; // minutes
  earningsInterval?: number; // minutes
}

export function startDataRefresh(
  db: Db,
  mainWindow: BrowserWindow,
  options: DataRefreshOptions = {}
): () => void {
  const {
    priceInterval = 5,
    filingInterval = 60,
    earningsInterval = 1440, // daily
  } = options;

  let priceTimeout: NodeJS.Timeout | null = null;
  let filingTimeout: NodeJS.Timeout | null = null;
  let earningsTimeout: NodeJS.Timeout | null = null;

  // Get all portfolio holdings
  function getPortfolioTickers(): string[] {
    const stmt = db.prepare(`
      SELECT DISTINCT ticker FROM holdings
      UNION
      SELECT DISTINCT ticker FROM companies
    `);
    const rows = stmt.all() as Array<{ ticker: string }>;
    return rows.map((r) => r.ticker);
  }

  // Refresh prices for all tickers
  async function refreshPrices() {
    try {
      const tickers = getPortfolioTickers();
      if (tickers.length === 0) return;

      console.log(`[DataRefresh] Refreshing prices for ${tickers.length} tickers`);

      for (const ticker of tickers) {
        const quote = await fetchQuote(ticker);
        if (quote) {
          // Update company price in database
          const company = db.prepare("SELECT * FROM companies WHERE ticker = ?").get(ticker) as any;
          if (company) {
            db.prepare(`
              UPDATE companies
              SET price = ?, change_pct = ?, updated_at = datetime('now')
              WHERE ticker = ?
            `).run(quote.price, quote.changePercent, ticker);
          }
        }
      }

      // Notify UI of price updates
      mainWindow?.webContents.send("data:prices-updated", {
        timestamp: new Date().toISOString(),
      });

      console.log("[DataRefresh] Price refresh complete");
    } catch (error) {
      console.error("[DataRefresh] Error refreshing prices:", error);
    }

    // Schedule next refresh
    priceTimeout = setTimeout(refreshPrices, priceInterval * 60 * 1000);
  }

  // Check for new filings
  async function refreshFilings() {
    try {
      const tickers = getPortfolioTickers();
      if (tickers.length === 0) return;

      console.log(`[DataRefresh] Checking for new filings for ${tickers.length} tickers`);

      for (const ticker of tickers) {
        // Get most recent filing date from database
        const existingFilings = listFilings(db, ticker);
        const since = existingFilings.length > 0
          ? existingFilings[0].filedDate
          : undefined;

        const newFilings = await fetchFilings(ticker, { limit: 10, since });

        for (const filing of newFilings) {
          // Check if filing already exists
          const exists = db.prepare(`
            SELECT id FROM filings WHERE company_id = ? AND filed_date = ? AND form_type = ?
          `).get(ticker, filing.filedDate, filing.formType);

          if (!exists) {
            db.prepare(`
              INSERT INTO filings (id, company_id, form_type, filed_date, title)
              VALUES (?, ?, ?, ?, ?)
            `).run(
              `${ticker}-${filing.formType}-${filing.filedDate}`,
              ticker,
              filing.formType,
              filing.filedDate,
              filing.title
            );

            // Notify UI of new filing
            mainWindow?.webContents.send("alert:new-filing", {
              ticker,
              formType: filing.formType,
              title: filing.title,
              filedDate: filing.filedDate,
            });
          }
        }
      }

      console.log("[DataRefresh] Filing refresh complete");
    } catch (error) {
      console.error("[DataRefresh] Error refreshing filings:", error);
    }

    // Schedule next refresh
    filingTimeout = setTimeout(refreshFilings, filingInterval * 60 * 1000);
  }

  // Refresh earnings dates
  async function refreshEarnings() {
    try {
      const tickers = getPortfolioTickers();
      if (tickers.length === 0) return;

      console.log(`[DataRefresh] Updating earnings dates for ${tickers.length} tickers`);

      // Import dynamically to avoid circular dependency
      const { getEarningsDate, getQuarterString } = await import("@mosaiciq/shared/data");

      for (const ticker of tickers) {
        const earningsDate = await getEarningsDate(ticker);
        if (earningsDate) {
          // Check if earnings schedule exists
          const existing = db.prepare(`
            SELECT id FROM earnings_schedules WHERE company_id = ? AND expected_date = ?
          `).get(ticker, earningsDate.toISOString());

          if (!existing) {
            const quarter = getQuarterString(earningsDate);
            db.prepare(`
              INSERT INTO earnings_schedules (id, company_id, quarter, expected_date)
              VALUES (?, ?, ?, ?)
            `).run(
              `earnings-${ticker}-${Date.now()}`,
              ticker,
              quarter,
              earningsDate.toISOString()
            );
          }
        }
      }

      console.log("[DataRefresh] Earnings refresh complete");
    } catch (error) {
      console.error("[DataRefresh] Error refreshing earnings:", error);
    }

    // Schedule next refresh
    earningsTimeout = setTimeout(refreshEarnings, earningsInterval * 60 * 1000);
  }

  // Start all refresh cycles
  console.log("[DataRefresh] Starting data refresh service");
  priceTimeout = setTimeout(refreshPrices, 1000); // Start immediately
  filingTimeout = setTimeout(refreshFilings, 5000); // Start after 5s
  earningsTimeout = setTimeout(refreshEarnings, 10000); // Start after 10s

  // Return cleanup function
  return () => {
    if (priceTimeout) clearTimeout(priceTimeout);
    if (filingTimeout) clearTimeout(filingTimeout);
    if (earningsTimeout) clearTimeout(earningsTimeout);
    console.log("[DataRefresh] Stopped data refresh service");
  };
}