// tslint:disable:no-any
export function getPathValue(source: any, path: string): any {
  if (!path) { return source; }
  const parts: string[] = path.split('.');
  let current: any = source;
  for (let i: number = 0; i < parts.length; i++) {
    if (current === undefined || current === null) { return undefined; }
    current = current[parts[i]];
  }
  return current;
}

export function setPathValue(target: any, path: string, value: any): void {
  const parts: string[] = path.split('.');
  let current: any = target;
  for (let i: number = 0; i < parts.length - 1; i++) {
    if (!current[parts[i]] || typeof current[parts[i]] !== 'object') {
      current[parts[i]] = {};
    }
    current = current[parts[i]];
  }
  current[parts[parts.length - 1]] = value;
}

export function cloneValue<T>(value: T): T {
  return JSON.parse(JSON.stringify(value));
}

export function mergePreservingUnknown(original: any, edited: any): any {
  if (!isObject(original) || !isObject(edited)) { return cloneValue(edited); }
  const result: any = cloneValue(original);
  Object.keys(edited).forEach((key: string): void => {
    result[key] = isObject(result[key]) && isObject(edited[key])
      ? mergePreservingUnknown(result[key], edited[key])
      : cloneValue(edited[key]);
  });
  return result;
}

export function isEmptyValue(value: any): boolean {
  return value === undefined || value === null || value === '' || (Array.isArray(value) && value.length === 0);
}

function isObject(value: any): boolean {
  return !!value && typeof value === 'object' && !Array.isArray(value);
}