from abc import ABC, abstractmethod
from typing import Dict, Any, Optional, List, Type, Union
from pydantic import BaseModel
from dataclasses import dataclass


@dataclass
class LLMCapabilities:
    supports_text_in: bool = True
    supports_text_out: bool = True
    supports_structured_json: bool = True
    supports_images_in: bool = False
    supports_audio_in: bool = False
    supports_images_out: bool = False
    supports_audio_out: bool = False
    supports_tools: bool = False


class LLMClient(ABC):
    """
    Abstract base class for LLM clients.
    Represent the capability of calling an LLM, decoupling it from specific providers.
    """

    @property
    @abstractmethod
    def capabilities(self) -> LLMCapabilities:
        """
        Return the capabilities of this LLM client.
        """
        pass

    @abstractmethod
    async def generate(
        self,
        prompt: str,
        *,
        instruction: Optional[str] = None,
        schema: Optional[Type[BaseModel]] = None,
        temperature: Optional[float] = None,
        tools: Optional[List[Any]] = None,
        metadata: Optional[Dict[str, Any]] = None,
        name: Optional[str] = None,
    ) -> Union[str, Dict[str, Any], BaseModel]:
        """
        Generate a response for a single prompt.
        """
        pass

    @abstractmethod
    async def chat(
        self,
        messages: List[Dict[str, str]],
        *,
        instruction: Optional[str] = None,
        schema: Optional[Type[BaseModel]] = None,
        temperature: Optional[float] = None,
        tools: Optional[List[Any]] = None,
        metadata: Optional[Dict[str, Any]] = None,
        name: Optional[str] = None,
    ) -> Union[str, Dict[str, Any], BaseModel]:
        """
        Conduct a multi-turn conversation.
        """
        pass

    async def close(self):
        """
        Optional: Close any underlying resources (e.g., aiohttp sessions).
        """
        pass