/**
 * 取消相同URL和method的上一个未结束请求，主要目的是防止页面切换时串数据，比如tab切换
 * 且只针对get请求
 */
// import hash from 'object-hash'
export { generateRequestHash } from './utils'

const cancellerCache: Record<string, Record<string, any>> = {}

export function addRequestCanceler(url: string, hash: string, cancelFn: () => void) {
  const urlCache = cancellerCache[url] || {}
  urlCache[hash] = cancelFn
  cancellerCache[url] = urlCache
}

export function clearCancelerByHash(url: string, hash: string) {
  if (cancellerCache[url] && cancellerCache[url][hash]) {
    Reflect.deleteProperty(cancellerCache[url], hash)
    if (Object.keys(cancellerCache[url]).length === 0) {
      Reflect.deleteProperty(cancellerCache, url)
    }
  }
}

// export function checkIfHasURLCanceler(url: string): boolean {
//   if (!cancellerCache[url]) return false
//   if (Object.keys(cancellerCache[url]).length === 0) return false
//   return true
// }

export function execCanceler(url: string) {
  const cancelers = cancellerCache[url] || {}
  Object.entries(cancelers).forEach(([key, fn]) => {
    fn()
    Reflect.deleteProperty(cancelers, key)
  })
  Reflect.deleteProperty(cancellerCache, url)
}

// export function getCachedCanceler(hashKey: string) {
//   return cancellerCache[hashKey]
// }