import requests
from datetime import datetime
from typing import List
from .base import BaseExchange, Trade

class LSExchange(BaseExchange):
    @property
    def name(self) -> str:
        return "LS"

    def fetch_latest_trades(self, include_yesterday: bool = False) -> List[Trade]:
        endpoints = ["https://www.ls-x.de/_rpc/json/.lstc/instrument/list/lstctradestoday"]
        if include_yesterday:
            endpoints.append("https://www.ls-x.de/_rpc/json/.lstc/instrument/list/lstctradesyesterday")
        
        headers = {
            'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
            'Accept': 'application/json',
            'Referer': 'https://www.ls-tc.de/'
        }
        
        all_trades = []
        for url in endpoints:
            try:
                response = requests.get(url, headers=headers)
                response.raise_for_status()
            
            import csv
            import io
            f = io.StringIO(response.text)
            # Header: isin;displayName;tradeTime;price;currency;size;orderId
            reader = csv.DictReader(f, delimiter=';')
            
            trades = []
            for item in reader:
                try:
                    price = float(item['price'].replace(',', '.'))
                    quantity = float(item['size'].replace(',', '.'))
                    isin = item['isin']
                    symbol = item['displayName']
                    time_str = item['tradeTime']
                    
                    # Format: 2026-01-23T07:30:00.992000Z
                    ts_str = time_str.replace('Z', '+00:00')
                    timestamp = datetime.fromisoformat(ts_str)
                    
                    all_trades.append(Trade(
                        exchange=self.name,
                        symbol=symbol,
                        isin=isin,
                        price=price,
                        quantity=quantity,
                        timestamp=timestamp
                    ))
                except Exception:
                    continue
            except Exception as e:
                print(f"Error fetching LS data from {url}: {e}")
        return all_trades