import type { PropertyValue } from '../models';
import { ObjectUtil } from './objectUtil';

export default class PropertyUtil {
  private static SYSTEM_PROPERTY_KEY_PREFIX = '$';
  private static MAX_PROPERTY_VALUE_LENGTH = 1024;

  static sanitizeValue(key: string, value: any): PropertyValue | null {
    if (
      typeof key === 'string' &&
      key.startsWith(this.SYSTEM_PROPERTY_KEY_PREFIX)
    ) {
      return value;
    }

    if (!this.isValidValue(value)) {
      return null;
    }

    if (Array.isArray(value)) {
      return value.filter((it) => this.isValidElement(it));
    }

    return value;
  }

  static isValidValue(value: any): value is PropertyValue {
    if (ObjectUtil.isNullOrUndefined(value)) {
      return false;
    }

    if (typeof value === 'string') {
      return value.length <= this.MAX_PROPERTY_VALUE_LENGTH;
    }

    if (typeof value === 'number') {
      return !isNaN(value) && isFinite(value);
    }

    return typeof value === 'boolean' || Array.isArray(value);
  }

  private static isValidElement(element: any): element is string | number {
    if (ObjectUtil.isNullOrUndefined(element)) {
      return false;
    }

    if (typeof element === 'string') {
      return (
        element.length > 0 && element.length <= this.MAX_PROPERTY_VALUE_LENGTH
      );
    }

    return typeof element === 'number';
  }
}