/**
 * bin/finance.js — Personal Finance CLI
 *
 * Fetches your accounts from SimpleFIN, screens your portfolio holdings,
 * and saves a finance-report.html with:
 *   1. Net worth + account overview  (SimpleFIN)
 *   2. Portfolio 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, saveAccessUrlToEnv } from '../server/finance/clients/SimpleFINClient.js';
import { PersonalFinanceAnalyzer } from '../server/finance/PersonalFinanceAnalyzer.js';
import { PortfolioAdvisor } from '../server/finance/PortfolioAdvisor.js';
import { ScreenerEngine } from '../server/screener/ScreenerEngine.js';
import { FinanceReporter } from '../server/reporters/FinanceReporter.js';

const PORTFOLIO_PATH = './portfolio.json';

async function main() {
  // ── 1. Load portfolio
  if (!existsSync(PORTFOLIO_PATH)) {
    throw new Error('portfolio.json not found — edit it with your holdings and re-run.');
  }

  const { holdings } = JSON.parse(readFileSync(PORTFOLIO_PATH, '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. SimpleFIN accounts (optional)
  let personalFinance = null;
  if (process.env.SIMPLEFIN_ACCESS_URL || process.env.SIMPLEFIN_SETUP_TOKEN) {
    try {
      process.stdout.write('💰 Fetching SimpleFIN accounts...');
      const client = new SimpleFINClient({ onAccessUrlClaimed: saveAccessUrlToEnv });
      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  Add SIMPLEFIN_SETUP_TOKEN to .env for account balances & spending data\n');
  }

  // ── 3. Screen stocks & ETFs
  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. Portfolio advice + crypto prices
  process.stdout.write('💡 Generating portfolio advice...');
  const advice = await new PortfolioAdvisor().advise(holdings, results);
  process.stdout.write(' done\n');

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

main().catch((err) => {
  console.error('Failed:', err.message);
  process.exit(1);
});