"""Main inference engine."""

from typing import AsyncIterator, Optional, Dict, Any, List
from .config import InfraionConfig


class InfraionEngine:
    """Main engine for LLM inference.

    Example:
        >>> engine = InfraionEngine(config)
        >>> response = await engine.generate("Hello")
    """

    def __init__(self, config: Optional[InfraionConfig] = None):
        """Initialize the engine.

        Args:
            config: Engine configuration.
        """
        self.config = config or InfraionConfig()
        self._initialized = False

    async def generate(
        self,
        prompt: str,
        **kwargs: Any,
    ) -> str:
        """Generate a response.

        Args:
            prompt: Input prompt.
            **kwargs: Additional options.

        Returns:
            Generated response text.
        """
        raise NotImplementedError("Full implementation coming soon")

    async def stream(
        self,
        prompt: str,
        **kwargs: Any,
    ) -> AsyncIterator[str]:
        """Stream a response.

        Args:
            prompt: Input prompt.
            **kwargs: Additional options.

        Yields:
            Response chunks.
        """
        raise NotImplementedError("Full implementation coming soon")
        yield  # type: ignore

    async def batch(
        self,
        prompts: List[str],
        **kwargs: Any,
    ) -> List[str]:
        """Generate responses for multiple prompts.

        Args:
            prompts: List of input prompts.
            **kwargs: Additional options.

        Returns:
            List of generated responses.
        """
        raise NotImplementedError("Full implementation coming soon")

    async def close(self) -> None:
        """Close the engine and release resources."""
        pass

    async def __aenter__(self) -> "InfraionEngine":
        return self

    async def __aexit__(self, *args: Any) -> None:
        await self.close()
