export function dottedGet(obj: any, path: string): any {
  const nodes = path.split(/\./g);
  return nodes.reduce((a, c) => {
    const index = dotgetkey(a, c, false);
    return a ? a[index] : undefined;
  }, obj);
}

export function dottedSet(obj: any, path: string, value: any): void {
  let current = obj;
  const keys = path.split(/\./g);
  for (let i = 0; i < keys.length; i += 1) {
    const next = keys[i + 1];
    const index = dotgetkey(current, keys[i], true, next);
    if (i === keys.length - 1) {
      current[index] = value;
    } else {
      current = current[index];
    }
  }
}

function dotgetkey(
  current: any,
  key: string,
  mutate = false,
  next?: string,
): string | number {
  const index = parseFloat(key);
  let indexKey: string | number = key;
  if (index || index === 0) {
    indexKey = index;
    if (mutate && index === current.length) {
      current.push({});
    } else if (index < 0 || index >= current.length) {
      throw new Error(`Index out of range: ${index}`);
    }
  } else if (mutate && current[key] === undefined) {
    if (next) {
      const index = parseFloat(next);
      if (index || index === 0) {
        current[key] = [];
      } else {
        current[key] = {};
      }
    } else {
      current[key] = {};
    }
  }
  return indexKey;
}

export default dottedGet;