Historical Prices

// Get past week with daily aggregation
async function getWeeklyPrices() {
  const response = await fetch(
    'https://api.oilpriceapi.com/v1/prices/past_week?by_code=WTI_USD&interval=1d',
    {
      headers: {
        'Authorization': 'Token YOUR_API_KEY'
      }
    }
  );

  const data = await response.json();
  return data.data.prices; // Returns ~7 daily averages
}

// Get optimized data for charting (monthly averages for past year)
async function getChartData(commodityCode = 'WTI_USD') {
  const response = await fetch(
    `https://api.oilpriceapi.com/v1/prices/past_year?by_code=${commodityCode}&interval=1m`,
    {
      headers: { 'Authorization': 'Token YOUR_API_KEY' }
    }
  );

  const data = await response.json();

  // Format for chart libraries (e.g., Chart.js, Recharts)
  return data.data.prices.map(price => ({
    date: new Date(price.created_at),
    value: price.price,
    formatted: price.formatted
  }));
}

// Handle pagination for raw (non-aggregated) data
async function getAllRawData(endpoint = 'past_week', commodityCode = 'WTI_USD') {
  let allData = [];
  let page = 1;
  let totalPages = 1;

  while (page <= totalPages) {
    const response = await fetch(
      `https://api.oilpriceapi.com/v1/prices/${endpoint}?by_code=${commodityCode}&page=${page}`,
      {
        headers: { 'Authorization': 'Token YOUR_API_KEY' }
      }
    );

    totalPages = parseInt(response.headers.get('X-Total-Pages'));
    const data = await response.json();

    if (data.data?.prices) {
      allData.push(...data.data.prices);
    }

    page++;
  }

  return allData;
}