from typing import TYPE_CHECKING, List, Optional, Tuple

if TYPE_CHECKING:
    from letta.schemas.agent import AgentState
    from letta.schemas.file import FileMetadata


async def open_file(agent_state: "AgentState", file_name: str, view_range: Optional[Tuple[int, int]]) -> str:
    """
    Open the file with name `file_name` and load the contents into files section in core memory.

    Args:
        file_name (str): Name of the file to view. Required.
        view_range (Optional[Tuple[int, int]]): Optional tuple indicating range to view.

    Returns:
        str: A status message
    """
    raise NotImplementedError("Tool not implemented. Please contact the Letta team.")


async def close_file(agent_state: "AgentState", file_name: str) -> str:
    """
    Close file with name `file_name` in files section in core memory.

    Args:
        file_name (str): Name of the file to close.

    Returns:
        str: A status message
    """
    raise NotImplementedError("Tool not implemented. Please contact the Letta team.")


async def grep(agent_state: "AgentState", pattern: str, include: Optional[str] = None) -> str:
    """
    Grep tool to search files across data sources with a keyword or regex pattern.

    Args:
        pattern (str): Keyword or regex pattern to search within file contents.
        include (Optional[str]): Optional keyword or regex pattern to filter filenames to include in the search.

    Returns:
        str: Matching lines or summary output.
    """
    raise NotImplementedError("Tool not implemented. Please contact the Letta team.")


async def search_files(agent_state: "AgentState", query: str) -> List["FileMetadata"]:
    """
    Get list of most relevant files across all data sources using embedding search.

    Args:
        query (str): The search query.

    Returns:
        List[FileMetadata]: List of matching files.
    """
    raise NotImplementedError("Tool not implemented. Please contact the Letta team.")
