from typing import Dict, Any, List
from datetime import datetime
from .base_handler import BaseHandler
from services.crypto_service import CryptoService

class CryptoHandler(BaseHandler):
    """加密货币价格处理器"""
    
    def __init__(self, crypto_service: CryptoService):
        self.crypto_service = crypto_service
    
    def handle(self, pair: str = "ETH-USDT", **kwargs) -> List[Dict[str, Any]]:
        """处理加密货币价格请求"""
        data = self.crypto_service.get_cached_data(f"{pair.lower()}_price", pair=pair)
        
        if not data:
            return [{
                "title": f"{pair} 价格获取失败",
                "description": "无法获取当前价格，请稍后重试",
                "link": "https://www.okx.com",
                "pub_date": datetime.now().strftime("%a, %d %b %Y %H:%M:%S +0800"),
                "guid": f"{pair}-error-{int(datetime.now().timestamp())}"
            }]
        
        # 格式化价格信息
        price = data['price']
        change_24h = data['change_24h']
        change_symbol = "📈" if change_24h >= 0 else "📉"
        
        title = f"{pair.replace('-', '/')} 当前价格: ${price:,.4f}"
        
        description = f"""
        🔸 当前价格: ${price:,.4f}
        🔸 24小时涨跌: {change_symbol} {change_24h:+.2f}%
        🔸 24小时最高: ${data['high_24h']:,.4f}
        🔸 24小时最低: ${data['low_24h']:,.4f}
        🔸 24小时成交量: {data['volume_24h']:,.2f}
        🔸 更新时间: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}
        """.strip()
        
        return [{
            "title": title,
            "description": description,
            "link": f"https://www.okx.com/trade-spot/{pair.lower()}",
            "pub_date": datetime.now().strftime("%a, %d %b %Y %H:%M:%S +0800"),
            "guid": f"{pair}-{int(datetime.now().timestamp())}"
        }]
    
    def get_handler_name(self) -> str:
        return "crypto"