"""
Event Service - Get event details from MongoDB ID or eventCode
"""
import httpx
from typing import Dict, Any, Optional


class EventService:
    """Service to fetch event details from external API"""
    
    def __init__(self, base_url: str = "https://hoalacrent.io.vn/api/v0"):
        self.base_url = base_url
        self.client = httpx.AsyncClient(timeout=10.0)
    
    async def get_event_by_code(self, event_code: str) -> Optional[Dict[str, Any]]:
        """
        Get event details by eventCode
        
        Args:
            event_code: Event code (e.g., "EVENT001")
        
        Returns:
            Event data or None if not found
        """
        try:
            url = f"{self.base_url}/event/get-event-by-event-code"
            response = await self.client.get(url, params={"eventCode": event_code})
            response.raise_for_status()
            
            data = response.json()
            if data.get("success") and data.get("data"):
                event = data["data"]
                return {
                    "eventCode": event.get("eventCode"),
                    "eventName": event.get("eventName"),
                    "eventAddress": event.get("eventAddress"),
                    "eventStartTime": event.get("eventStartTime"),
                    "eventEndTime": event.get("eventEndTime"),
                    "maxParticipants": event.get("maxParticipants"),
                    "eventOrganizer": event.get("eventOrganizer"),
                    "eventDescription": event.get("eventDescription")
                }
            return None
        except Exception as e:
            print(f"⚠️ Error fetching event by code: {e}")
            return None
    
    async def get_event_by_id(self, event_id: str) -> Optional[Dict[str, Any]]:
        """
        Get event details by MongoDB _id
        
        IMPORTANT: Backend needs to implement this endpoint:
        GET /api/v0/event/get-event-by-id?id={mongodb_id}
        
        Args:
            event_id: MongoDB _id (e.g., "6900ae38eb03f29702c7fd1d")
        
        Returns:
            Event data or None if not found
        """
        try:
            # Option 1: If backend has this endpoint
            url = f"{self.base_url}/event/get-event-by-id"
            response = await self.client.get(url, params={"id": event_id})
            response.raise_for_status()
            
            data = response.json()
            if data.get("success") and data.get("data"):
                event = data["data"]
                return {
                    "eventCode": event.get("eventCode"),
                    "eventName": event.get("eventName"),
                    "eventAddress": event.get("eventAddress"),
                    "eventStartTime": event.get("eventStartTime"),
                    "eventEndTime": event.get("eventEndTime"),
                    "maxParticipants": event.get("maxParticipants"),
                    "eventOrganizer": event.get("eventOrganizer"),
                    "eventDescription": event.get("eventDescription")
                }
            return None
        except httpx.HTTPStatusError as e:
            if e.response.status_code == 404:
                print(f"⚠️ Event not found: {event_id}")
            else:
                print(f"⚠️ Error fetching event by ID: {e}")
            return None
        except Exception as e:
            print(f"⚠️ Error fetching event by ID: {e}")
            return None
    
    def format_event_for_display(self, event: Dict[str, Any]) -> str:
        """
        Format event data for chat display
        
        Args:
            event: Event data dict
        
        Returns:
            Formatted string
        """
        name = event.get("eventName", "Sự kiện")
        
        # Format date
        start = event.get("eventStartTime", "")
        date_str = start[:10] if start else "TBA"  # Extract date part
        
        # Format location
        location = event.get("eventAddress", "")
        
        result = f"**{name}**"
        if date_str != "TBA":
            result += f" ({date_str})"
        if location:
            result += f" - {location}"
        
        return result
    
    async def close(self):
        """Close HTTP client"""
        await self.client.aclose()