export function registerServiceWorker() {
  if (typeof window === "undefined" || !("serviceWorker" in navigator)) {
    console.log("Service Worker 不被支持")
    return
  }

  window.addEventListener("load", () => {
    navigator.serviceWorker
      .register("/sw.js")
      .then((registration) => {
        console.log("Service Worker 注册成功:", registration.scope)

        // 检查更新
        registration.addEventListener("updatefound", () => {
          const newWorker = registration.installing
          if (newWorker) {
            newWorker.addEventListener("statechange", () => {
              if (newWorker.state === "installed" && navigator.serviceWorker.controller) {
                // 新的 Service Worker 已安装，提示用户刷新
                if (confirm("发现新版本，是否立即更新？")) {
                  window.location.reload()
                }
              }
            })
          }
        })
      })
      .catch((error) => {
        console.log("Service Worker 注册失败:", error)
      })
  })
}

export function unregisterServiceWorker() {
  if (typeof window === "undefined" || !("serviceWorker" in navigator)) {
    return
  }

  navigator.serviceWorker.ready
    .then((registration) => {
      registration.unregister()
    })
    .catch((error) => {
      console.error("Service Worker 注销失败:", error)
    })
}