"""API client for RewardPilot Orchestrator"""

import httpx
from typing import Dict, Optional
from config import ORCHESTRATOR_URL
from typing import Any, Dict, List, Optional, Tuple
import logging

# Create logger
logger = logging.getLogger(__name__)

class RewardPilotClient:
    """Client for interacting with RewardPilot Orchestrator"""
    
    def __init__(self, base_url: str = ORCHESTRATOR_URL):
        self.base_url = base_url.rstrip('/')
        self.timeout = 30.0
    
    async def get_recommendation(
        self,
        user_id: str,
        merchant: str,
        mcc: str,
        amount_usd: float,
        transaction_date: Optional[str] = None
    ) -> Dict:
        """Get card recommendation from orchestrator"""
        async with httpx.AsyncClient(timeout=self.timeout) as client:
            try:
                payload = {
                    "user_id": user_id,
                    "merchant": merchant,
                    "mcc": mcc,
                    "amount_usd": amount_usd
                }
                if transaction_date:
                    payload["transaction_date"] = transaction_date
                
                response = await client.post(
                    f"{self.base_url}/recommend",
                    json=payload
                )
                response.raise_for_status()
                return response.json()
            except httpx.HTTPError as e:
                return {
                    "error": True,
                    "message": f"API Error: {str(e)}"
                }
            except Exception as e:
                return {
                    "error": True,
                    "message": f"Unexpected error: {str(e)}"
                }
    
    def get_recommendation_sync(
        self,
        user_id: str,
        merchant: str,
        mcc: str,
        amount_usd: float,
        transaction_date: Optional[str] = None
    ) -> Dict:
        """Synchronous version for Gradio"""
        import asyncio
        try:
            loop = asyncio.get_event_loop()
        except RuntimeError:
            loop = asyncio.new_event_loop()
            asyncio.set_event_loop(loop)
        
        return loop.run_until_complete(
            self.get_recommendation(
                user_id, merchant, mcc, amount_usd, transaction_date
            )
        )

    def get_user_analytics(self, user_id: str) -> Dict[str, Any]:
        """
        Fetch user analytics including spending patterns and optimization metrics
        
        Args:
            user_id: User identifier
            
        Returns:
            Dictionary containing analytics data
        """
        try:
            # Option 1: If you have a dedicated analytics endpoint
            response = httpx.get(
                f"{self.orchestrator_url}/analytics/{user_id}",
                timeout=30.0
            )
            response.raise_for_status()
            return response.json()
            
        except Exception as e:
            logger.error(f"Analytics fetch failed: {e}")
            # Return mock data as fallback
            return self._get_mock_analytics(user_id)
    
    def _get_mock_analytics(self, user_id: str) -> Dict[str, Any]:
        """Generate mock analytics data for demo purposes"""
        import random
        
        # Different data per user for variety
        user_multipliers = {
            "u_alice": 1.2,
            "u_bob": 0.9,
            "u_charlie": 1.5,
        }
        multiplier = user_multipliers.get(user_id, 1.0)
        
        return {
            "user_id": user_id,
            "annual_savings": round(342 * multiplier, 2),
            "rate_increase": round(23 * multiplier, 1),
            "optimized_transactions": int(156 * multiplier),
            "optimization_score": min(100, int(87 * multiplier)),
            "category_breakdown": [
                {
                    "category": "🛒 Groceries",
                    "monthly_spend": round(450 * multiplier, 2),
                    "best_card": "Amex Gold",
                    "rewards": round(27 * multiplier, 2),
                    "rate": "6%"
                },
                {
                    "category": "🍽️ Restaurants",
                    "monthly_spend": round(320 * multiplier, 2),
                    "best_card": "Amex Gold",
                    "rewards": round(12.8 * multiplier, 2),
                    "rate": "4%"
                },
                {
                    "category": "⛽ Gas",
                    "monthly_spend": round(180 * multiplier, 2),
                    "best_card": "Costco Visa",
                    "rewards": round(7.2 * multiplier, 2),
                    "rate": "4%"
                },
                {
                    "category": "✈️ Travel",
                    "monthly_spend": round(850 * multiplier, 2),
                    "best_card": "Sapphire Reserve",
                    "rewards": round(42.5 * multiplier, 2),
                    "rate": "5%"
                },
                {
                    "category": "🎬 Entertainment",
                    "monthly_spend": round(125 * multiplier, 2),
                    "best_card": "Freedom Unlimited",
                    "rewards": round(1.88 * multiplier, 2),
                    "rate": "1.5%"
                },
                {
                    "category": "🏪 Online Shopping",
                    "monthly_spend": round(280 * multiplier, 2),
                    "best_card": "Amazon Prime",
                    "rewards": round(16.8 * multiplier, 2),
                    "rate": "6%"
                }
            ],
            "total_monthly_spend": round(2205 * multiplier, 2),
            "total_monthly_rewards": round(108.18 * multiplier, 2),
            "average_rate": round(4.9, 1),
            "top_categories": [
                {"name": "✈️ Travel", "amount": round(850 * multiplier, 2), "change": "+45%"},
                {"name": "🛒 Groceries", "amount": round(450 * multiplier, 2), "change": "+12%"},
                {"name": "🍽️ Restaurants", "amount": round(320 * multiplier, 2), "change": "-5%"}
            ],
            "ytd_rewards": round(1298.16 * multiplier, 2),
            "ytd_potential": round(1640 * multiplier, 2),
            "money_left": round(341.84 * multiplier, 2),
            "forecast": {
                "next_month_spend": round(2350 * multiplier, 2),
                "next_month_rewards": round(115.25 * multiplier, 2),
                "cards_to_watch": ["Amex Gold (dining cap)", "Freedom (quarterly bonus)"]
            },
            "recommendations": [
                "💳 Use Chase Freedom for groceries in Q4 (5% back)",
                "⚠️ Monitor Amex Gold dining spend (cap at $2,000)",
                "🎯 Book holiday travel with Sapphire Reserve for 5x points"
            ]
        }