import z, { toJSONSchema } from "zod";

const schema = z.object({
  name: z.string().describe("The name of the person"),
  age: z.number().int().min(0).describe("The age of the person"),
  email: z.string().optional().describe("The email address of the person"),
});

console.log("JSON Schema for the person object:");
console.log(
  JSON.stringify(toJSONSchema(schema), null, 2)
);
const jsonSchema = toJSONSchema(schema);

const schema2 = z.fromJSONSchema(jsonSchema);

// schema2 的类型是 ZodSchema<any>,所以无法在编译时推断出具体类型
// 这是 fromJSONSchema 的限制 - JSON Schema 转换会丢失 TypeScript 类型信息

schema2.parse({
  name: "John Doe",
  age: 30, // 添加必需的 age 字段
  email: "",
})

type Schema2Type = z.infer<typeof schema2>;
// Schema2Type 被推断为 any

// 对比:原始 schema 的类型推断是正常的
type OriginalSchemaType = z.infer<typeof schema>;
// OriginalSchemaType = { name: string; age: number; email?: string | undefined }

const v: Schema2Type = {
  name: "John Doe",
  email: ""
}

// 如果使用原始 schema,类型推断会正常工作:
const v2: OriginalSchemaType = {
  name: "John Doe",
  age: 30,
  // email 是可选的
}