from dataclasses import dataclass
from typing import Any, Callable


ToolContext = dict[str, Any]
ToolArgs = dict[str, Any]
ToolRunner = Callable[[ToolArgs, ToolContext], dict[str, Any]]


@dataclass(frozen=True)
class ToolSpec:
    name: str
    description: str
    input_schema: dict[str, Any]
    run: ToolRunner
    enabled: bool = True
    cost_level: str = "low"

    def prompt_block(self) -> str:
        enabled_text = "enabled" if self.enabled else "disabled"
        return (
            f"- {self.name} ({enabled_text}, cost={self.cost_level})\n"
            f"  description: {self.description}\n"
            f"  args_schema: {self.input_schema}"
        )