export default function handler(req, res) {
  const { symbol } = req.query
  const days = 30
  
  const generateHistoricalData = (basePrice) => {
    const data = []
    let currentPrice = basePrice * 0.9
    
    for (let i = days; i >= 0; i--) {
      const date = new Date()
      date.setDate(date.getDate() - i)
      
      const volatility = 0.03
      const trend = i === 0 ? 1 : 1 + (Math.random() - 0.5) * volatility
      currentPrice = currentPrice * trend
      
      data.push({
        date: date.toISOString().split('T')[0],
        price: parseFloat(currentPrice.toFixed(2)),
        volume: Math.floor(Math.random() * 50000000) + 10000000
      })
    }
    
    return data
  }

  const stockPrices = {
    'AAPL': 178.50,
    'MSFT': 378.85,
    'GOOGL': 139.62,
    'AMZN': 145.78,
    'META': 312.45,
    'TSLA': 248.50,
    'NVDA': 485.09,
    'NFLX': 445.03,
  }

  const basePrice = stockPrices[symbol] || 100
  const chartData = generateHistoricalData(basePrice)

  res.status(200).json(chartData)
}