from abc import ABC, abstractmethod
from dataclasses import dataclass


class ToolError(Exception):
    pass


@dataclass
class ToolResult:
    content: str


class Tool(ABC):
    @property
    @abstractmethod
    def name(self) -> str: ...

    @property
    @abstractmethod
    def description(self) -> str: ...

    @property
    @abstractmethod
    def schema(self) -> dict[str, object]: ...

    @abstractmethod
    def execute(self, arguments: dict[str, object]) -> ToolResult: ...


class ToolRegistry:
    def __init__(self) -> None:
        self.tools: dict[str, Tool] = {}

    def register(self, tool: Tool) -> None:
        self.tools[tool.name] = tool

    def get(self, name: str) -> Tool | None:
        return self.tools.get(name)

    def all(self) -> list[Tool]:
        return list(self.tools.values())

    def schemas(self) -> list[dict[str, object]]:
        return [
            {
                "type": "function",
                "function": {
                    "name": tool.name,
                    "description": tool.description,
                    "parameters": tool.schema,
                },
            }
            for tool in self.tools.values()
        ]