import requests
import pandas as pd
from datetime import datetime, timedelta

class MarketData:
    def __init__(self):
        self.base_url = "YOUR_MARKET_DATA_API_ENDPOINT"
        
    def fetch_ohlcv(self, symbol, timeframe='1d'):
        """
        Fetch OHLCV data for given symbol
        Returns: DataFrame with columns [timestamp, open, high, low, close, volume]
        """
        endpoint = f"{self.base_url}/historical/{symbol}"
        params = {
            'timeframe': timeframe,
            'limit': 365  # Last year of data
        }
        
        response = requests.get(endpoint, params=params)
        data = response.json()
        
        df = pd.DataFrame(data)
        df['timestamp'] = pd.to_datetime(df['timestamp'])
        return df
    
    def get_latest_price(self, symbol):
        endpoint = f"{self.base_url}/price/{symbol}"
        response = requests.get(endpoint)
        return response.json()['price']