import { createTool } from "@mastra/core/tools";
import { z } from "zod";

export const calculatorTool = createTool({
  id: "calculator",
  description: "执行基本算术运算",
  inputSchema: z.object({
    operation: z.enum(["add", "subtract", "multiply", "divide"]).describe("要执行的算术运算"),
    a: z.number().describe("第一个数字"),
    b: z.number().describe("第二个数字"),
  }),
  outputSchema: z.object({
    result: z.number(),
    operation: z.string(),
  }),
  execute: async ({ context }) => {
    const { operation, a, b } = context;
    let result: number;
    switch (operation) {
      case "add":
        result = a + b;
        break;
      case "subtract":
        result = a - b;
        break;
      case "multiply":
        result = a * b;
        break;
      case "divide":
        if (b === 0) throw new Error("Division by zero");
        result = a / b;
        break;
      default:
        throw new Error(`Unknown operation: ${operation}`);
    }
    return {
      result,
      operation: `${a} ${operation} ${b}`,
    };
  },
});