export default function handler(req, res) {
  const generateRandomPrice = (base, volatility = 0.02) => {
    return base * (1 + (Math.random() - 0.5) * volatility)
  }

  const generateChange = () => {
    return (Math.random() - 0.48) * 10
  }

  const stocks = [
    { symbol: 'AAPL', name: 'Apple Inc.', basePrice: 178.50 },
    { symbol: 'MSFT', name: 'Microsoft', basePrice: 378.85 },
    { symbol: 'GOOGL', name: 'Alphabet', basePrice: 139.62 },
    { symbol: 'AMZN', name: 'Amazon', basePrice: 145.78 },
    { symbol: 'META', name: 'Meta Platforms', basePrice: 312.45 },
    { symbol: 'TSLA', name: 'Tesla', basePrice: 248.50 },
    { symbol: 'NVDA', name: 'NVIDIA', basePrice: 485.09 },
    { symbol: 'NFLX', name: 'Netflix', basePrice: 445.03 },
  ]

  const stocksData = stocks.map(stock => {
    const price = generateRandomPrice(stock.basePrice)
    const change = generateChange()
    const changePercent = (change / stock.basePrice) * 100
    
    return {
      ...stock,
      price: price.toFixed(2),
      change: change.toFixed(2),
      changePercent: changePercent.toFixed(2),
      volume: Math.floor(Math.random() * 100000000) + 10000000,
      marketCap: (price * 1000000000).toFixed(0),
    }
  })

  const marketOverview = {
    sp500: {
      value: 4514.02,
      change: 15.36,
      changePercent: 0.34
    },
    nasdaq: {
      value: 14113.70,
      change: 123.45,
      changePercent: 0.88
    },
    dow: {
      value: 35430.42,
      change: -45.12,
      changePercent: -0.13
    },
    vix: {
      value: 14.82,
      change: -0.45,
      changePercent: -2.95
    }
  }

  res.status(200).json({
    stocks: stocksData,
    marketOverview,
    timestamp: new Date().toISOString()
  })
}