import requests
import logging
from time import sleep
from typing import List, Dict, Optional
from datetime import datetime
class ValuationCollector:
    def __init__(self, api_key: str):
        self.api_key = api_key
        self.base_url = "https://financialmodelingprep.com/api/v3"
        self.base_url_v4 = "https://financialmodelingprep.com/api/v4"
        self.rate_limit_pause = 0.2
        self.session = requests.Session()
        self.max_retries = 3
        self.retry_delay = 1  # Initial delay in seconds

    def _make_request(self, url: str, params: Dict) -> Optional[List[Dict]]:
        """Make API request with retry mechanism and error handling."""
        try:
            sleep(self.rate_limit_pause)
            response = self.session.get(url, params=params, timeout=30)
            response.raise_for_status()
            return response.json()
        except requests.exceptions.RequestException as e:
            logging.error(f"API request error for {url}: {str(e)}")
            return None
        except ValueError as e:
            logging.error(f"JSON parsing error for {url}: {str(e)}")
            return None

    def get_simple_dcf(self, ticker: str) -> Optional[List[Dict]]:
        """Get simple DCF valuation."""
        params = {'apikey': self.api_key}
        return self._make_request(f"{self.base_url}/discounted-cash-flow/{ticker}", params)

    def get_advanced_dcf(self, ticker: str) -> Optional[List[Dict]]:
        """Get advanced DCF valuation."""
        params = {'apikey': self.api_key, 'symbol': ticker}
        return self._make_request(f"{self.base_url_v4}/advanced_discounted_cash_flow", params)

    def get_levered_dcf(self, ticker: str) -> Optional[List[Dict]]:
        """Get levered DCF valuation."""
        params = {'apikey': self.api_key, 'symbol': ticker}
        return self._make_request(f"{self.base_url_v4}/advanced_levered_discounted_cash_flow", params)

    def get_company_rating(self, ticker: str) -> Optional[List[Dict]]:
        """Get current company rating."""
        params = {'apikey': self.api_key}
        return self._make_request(f"{self.base_url}/rating/{ticker}", params)

    def get_historical_rating(self, ticker: str) -> Optional[List[Dict]]:
        """Get historical company ratings."""
        params = {'apikey': self.api_key}
        return self._make_request(f"{self.base_url}/historical-rating/{ticker}", params)