// finance.js — Personal Finance Entry Point
//
// Runs independently of the news screener.
// Fetches your accounts from SimpleFIN, screens your portfolio holdings,
// and generates a finance-report.html with:
//
//   1. Net worth + account overview  (SimpleFIN)
//   2. Portfolio positions with hold/sell/add advice  (screener + crypto prices)
//   3. Spending breakdown  (SimpleFIN)
//
// Usage:
//   npm run finance

import 'dotenv/config';
import { readFileSync, existsSync } from 'fs';
import { SimpleFINClient } from './src/finance/SimpleFINClient.js';
import { PersonalFinanceAnalyzer } from './src/finance/PersonalFinanceAnalyzer.js';
import { PortfolioAdvisor } from './src/finance/PortfolioAdvisor.js';
import { ScreenerEngine } from './src/core/engine/ScreenerEngine.js';
import { FinanceReporter } from './src/reporters/FinanceReporter.js';

async function main() {
  // ── 1. Load portfolio ──────────────────────────────────────────────────────
  if (!existsSync('./portfolio.json')) {
    console.error('portfolio.json not found. Edit it with your holdings and re-run.');
    process.exit(1);
  }
  const { holdings } = JSON.parse(readFileSync('./portfolio.json', 'utf8'));

  const byType = holdings.reduce((acc, h) => {
    const t = h.type ?? 'stock';
    acc[t] = (acc[t] ?? 0) + 1;
    return acc;
  }, {});
  console.log(
    `📋 Portfolio: ${holdings.length} positions — ${Object.entries(byType)
      .map(([t, n]) => `${n} ${t}`)
      .join(', ')}\n`,
  );

  // ── 2. Fetch SimpleFIN data ────────────────────────────────────────────────
  let personalFinance = null;
  if (process.env.SIMPLEFIN_ACCESS_URL || process.env.SIMPLEFIN_SETUP_TOKEN) {
    try {
      process.stdout.write('💰 Fetching accounts from SimpleFIN...');
      const client = new SimpleFINClient();
      await client.init();
      const { accounts } = await client.getAccounts();
      personalFinance = new PersonalFinanceAnalyzer().analyse(accounts);
      process.stdout.write(` ${accounts.length} accounts loaded\n`);
    } catch (err) {
      process.stdout.write(` skipped — ${err.message}\n`);
    }
  } else {
    console.log(
      'ℹ  SimpleFIN not configured — add SIMPLEFIN_SETUP_TOKEN to .env for account data\n',
    );
  }

  // ── 3. Screen stocks + ETFs (crypto handled separately by PortfolioAdvisor) ─
  const screenableTickers = holdings
    .filter((h) => (h.type ?? 'stock') !== 'crypto')
    .map((h) => h.ticker.toUpperCase());

  let results = { STOCK: [], ETF: [], BOND: [], ERROR: [], marketContext: {} };
  if (screenableTickers.length > 0) {
    process.stdout.write(`📊 Screening ${screenableTickers.length} stock/ETF positions...`);
    results = await new ScreenerEngine().screenTickers(screenableTickers);
    process.stdout.write(' done\n');
  }

  // ── 4. Fetch crypto prices + generate advice ───────────────────────────────
  process.stdout.write('💡 Generating advice...');
  const advice = await new PortfolioAdvisor().advise(holdings, results);
  process.stdout.write(' done\n');

  // ── 5. Generate report ─────────────────────────────────────────────────────
  const reportPath = new FinanceReporter().generate(advice, personalFinance, results.marketContext);
  console.log(`\n✅  Finance report saved to: ${reportPath}\n`);
}

main().catch((err) => console.error('Failed:', err.message));