"""Tool registry for dynamic tool management."""

from typing import Any

from exoclaw.agent.tools.protocol import Tool, ToolContext


class ToolRegistry:
    """
    Registry for agent tools.

    Allows dynamic registration and execution of tools.
    """

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

    def register(self, tool: Tool) -> None:
        """Register a tool."""
        self._tools[tool.name] = tool

    def unregister(self, name: str) -> None:
        """Unregister a tool by name."""
        self._tools.pop(name, None)

    def get(self, name: str) -> Tool | None:
        """Get a tool by name."""
        return self._tools.get(name)

    def has(self, name: str) -> bool:
        """Check if a tool is registered."""
        return name in self._tools

    def get_definitions(self) -> list[dict[str, Any]]:
        """Get all tool definitions in OpenAI format."""
        return [
            {
                "type": "function",
                "function": {
                    "name": tool.name,
                    "description": tool.description,
                    "parameters": tool.parameters,
                },
            }
            for tool in self._tools.values()
        ]

    async def execute(
        self, name: str, params: dict[str, Any], ctx: ToolContext | None = None
    ) -> str:
        """Execute a tool by name with given parameters.

        If the tool implements execute_with_context(ctx, **kwargs), that is called
        instead of execute(**kwargs). Falls back to execute() if not implemented or
        ctx is None.
        """
        _HINT = "\n\n[Analyze the error above and try a different approach.]"

        tool = self._tools.get(name)
        if not tool:
            return f"Error: Tool '{name}' not found. Available: {', '.join(self.tool_names)}"

        try:
            if hasattr(tool, "cast_params"):
                params = getattr(tool, "cast_params")(params)
            if hasattr(tool, "validate_params"):
                errors: list[str] = getattr(tool, "validate_params")(params)
                if errors:
                    return f"Error: Invalid parameters for tool '{name}': " + "; ".join(errors) + _HINT
            if ctx is not None and hasattr(tool, "execute_with_context"):
                result: str = await getattr(tool, "execute_with_context")(ctx, **params)
            else:
                result = await tool.execute(**params)
            if isinstance(result, str) and result.startswith("Error"):
                return result + _HINT
            return result
        except Exception as e:
            return f"Error executing {name}: {str(e)}" + _HINT

    @property
    def tool_names(self) -> list[str]:
        """Get list of registered tool names."""
        return list(self._tools.keys())
