from typing import Dict, Any, Optional
from ..client import AvitoClient

class MessengerService:
    """Service to handle Avito Messenger (Chats)."""
    
    def __init__(self, client: AvitoClient):
        self.client = client

    def get_chats(self, user_id: str, limit: int = 100, offset: int = 0) -> Dict[str, Any]:
        """
        Get list of active chats for a user.
        Endpoint: /messenger/v2/accounts/{user_id}/chats
        """
        params = {"limit": limit, "offset": offset}
        return self.client.get(f"/messenger/v2/accounts/{user_id}/chats", params=params)

    def send_message(self, user_id: str, chat_id: str, text: str) -> Dict[str, Any]:
        """
        Send a text message to a specific chat.
        Endpoint: /messenger/v1/accounts/{user_id}/chats/{chat_id}/messages
        """
        payload = {
            "message": {
                "text": text
            },
            "type": "text"
        }
        return self.client.post(f"/messenger/v1/accounts/{user_id}/chats/{chat_id}/messages", data=payload)