export class SemVer {
  major = 0;
  minor = 0;
  patch = 0;
  preRelease?: string;
  meta?: string;

  constructor(versionString: string) {
    const result =
      /^([0-9]+)\.([0-9]+)\.([0-9]+)(?:-([0-9A-Za-z-]+(?:\.[0-9A-Za-z-]+)*))?(?:\+([0-9A-Za-z-]+))?$/.exec(
        versionString,
      );
    if (!result) {
      console.error("Invalid version string:", versionString);
    } else {
      const [, major, minor, patch, preRelease, meta] = result;
      this.major = Number.parseInt(major ?? "NaN");
      this.minor = Number.parseInt(minor ?? "NaN");
      this.patch = Number.parseInt(patch ?? "NaN");
      if (preRelease) this.preRelease = preRelease;
      if (meta) this.meta = meta;
    }
  }

  toString() {
    return (
      `${this.major}.${this.minor}.${this.patch}` +
      (this.preRelease ? `-${this.preRelease}` : "") +
      (this.meta ? `+${this.meta}` : "")
    );
  }
}