/*
 * Code generated by Speakeasy (https://speakeasy.com). DO NOT EDIT.
 */

const dateRE = /^\d{4}-\d{2}-\d{2}$/;

export class RFCDate {
  private serialized: string;

  /**
   * Creates a new RFCDate instance using today's date.
   */
  static today(): RFCDate {
    return new RFCDate(new Date());
  }

  /**
   * Creates a new RFCDate instance using the provided input.
   * If a string is used then in must be in the format YYYY-MM-DD.
   *
   * @param date A Date object or a date string in YYYY-MM-DD format
   * @example
   * new RFCDate("2022-01-01")
   * @example
   * new RFCDate(new Date())
   */
  constructor(date: Date | string) {
    if (typeof date === "string" && !dateRE.test(date)) {
      throw new RangeError(
        "RFCDate: date strings must be in the format YYYY-MM-DD: " + date,
      );
    }

    const value = new Date(date);
    if (isNaN(+value)) {
      throw new RangeError("RFCDate: invalid date provided: " + date);
    }

    this.serialized = value.toISOString().slice(0, "YYYY-MM-DD".length);
    if (!dateRE.test(this.serialized)) {
      throw new TypeError(
        `RFCDate: failed to build valid date with given value: ${date} serialized to ${this.serialized}`,
      );
    }
  }

  toJSON(): string {
    return this.toString();
  }

  toString(): string {
    return this.serialized;
  }
}