from personal_agent.tools.base import Tool, ToolError, ToolResult


class CalculatorTool(Tool):
    @property
    def name(self) -> str:
        return "calculator"

    @property
    def description(self) -> str:
        return "Perform basic arithemtic"

    @property
    def schema(self) -> dict[str, object]:
        return {
            "type": "object",
            "properties": {
                "a": {
                    "type": "number",
                    "description": "The first number.",
                },
                "b": {
                    "type": "number",
                    "description": "The second number.",
                },
                "operation": {
                    "type": "string",
                    "enum": ["add", "subtract", "multiply", "divide"],
                    "description": "The arithemtic operation to perform",
                },
            },
            "required": ["a", "b", "operation"],
        }

    def execute(self, arguments: dict[str, object]) -> ToolResult:
        a = arguments["a"]
        b = arguments["b"]
        operation = arguments["operation"]

        if not isinstance(a, (int, float)):
            raise ToolError("a must be a number")

        if not isinstance(b, (int, float)):
            raise ToolError("b must be a number")

        if not isinstance(operation, str):
            raise ToolError("operation must be a string")

        if operation == "add":
            result = a + b
        elif operation == "subtract":
            result = a - b
        elif operation == "multiply":
            result = a * b
        elif operation == "divide":
            if b == 0:
                raise ToolError("cannot divide by zero")
            result = a / b
        else:
            raise ToolError(f"unknown operation: {operation}")

        return ToolResult(content=str(result))