import { Result } from "./Result";
import { Primitive, ValueObject } from "./ValueObject";

type KeyValueMapProps = Map<string, Primitive>;

export class KeyValueMap extends ValueObject<KeyValueMapProps> {
  public static create(entries?: [string, Primitive][]) {
    const map = new Map<string, Primitive>(entries);
    return Result.ok(new KeyValueMap(map));
  }

  get(key: string): Primitive | undefined {
    return this.props.get(key);
  }

  set(key: string, value: Primitive): KeyValueMap {
    const newMap = new Map(this.props);
    newMap.set(key, value);
    return new KeyValueMap(newMap);
  }

  delete(key: string): KeyValueMap {
    const newMap = new Map(this.props);
    newMap.delete(key);
    return new KeyValueMap(newMap);
  }

  public toPrimitive(): string {
    return JSON.stringify(Object.fromEntries(this.props.entries()));
  }

  public entries(): [string, Primitive][] {
    return Array.from(this.props.entries());
  }
}