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export type JSONPrimitive = string | number | boolean | null;

export type JSONValue =
  | JSONPrimitive
  | JSONObject
  | JSONArray;

export interface JSONObject {
  [key: string]: JSONValue;
}

export type JSONArray = JSONValue[];

export function getByPath(
  value: JSONValue,
  path: Array<string | number>
): JSONValue | undefined {
  let current: JSONValue = value;

  for (const key of path) {
    if (
      typeof key === "string" &&
      current !== null &&
      typeof current === "object" &&
      !Array.isArray(current)
    ) {
      current = (current as JSONObject)[key];
    }
    else if (
      typeof key === "number" &&
      Array.isArray(current)
    ) {
      current = current[key];
    }
    else {
      return undefined;
    }
  }

  return current;
}