/**
 * Route parameter and query parsing helpers
 * Centralizes route param type handling to avoid runtime checks in components
 */

import type { LocationQueryValue } from 'vue-router'

/**
 * Parse a route param (string | string[] | undefined) to a number ID
 * Returns null if param is missing or invalid
 */
export function parseRouteId(param: string | string[] | undefined): number | null {
  if (!param) return null
  const str = Array.isArray(param) ? param[0] : param
  if (!str) return null
  const id = parseInt(str, 10)
  return isNaN(id) || id < 0 ? null : id
}

/**
 * Parse a route query param to a string
 * Returns empty string if param is missing, null, or is an array
 */
export function parseQueryString(param: LocationQueryValue | LocationQueryValue[] | undefined): string {
  if (!param) return ''
  return Array.isArray(param) ? '' : param
}