import { Result, ValueObject } from "@common/domain";
import { z } from "zod";

export class Username extends ValueObject<string> {
  static create(username: string): Result<Username, Error> {
    const result = Username.validate(username);

    return result.success
      ? Result.ok(new Username(result.data))
      : Result.fail(new Error(result.error.errors[0].message));
  }

  private static validate(username: string) {
    const schema = z
      .string()
      .min(3, { message: "Username must be at least 3 characters long" })
      .max(30, { message: "Username cannot exceed 30 characters" })
      .regex(/^[a-zA-Z0-9_]+$/, {
        message: "Username can only contain letters, numbers, and underscores",
      });

    return schema.safeParse(username);
  }
}