async function apiGetRetry(url, retry = false) {
  try {
    const res = await fetch(url);
    if (!res.ok) {
      throw new Error("HTTP " + res.status);
    }

    const text = await res.text();
    if (!text || text.trim() === "") {
      throw new Error("empty response");
    }

    return text.trim();
  } catch (e) {
    console.log("GET failed:", url, e.message);

    if (retry) {
      setTimeout(() => apiGetRetry(url, true), 3000);
    }

    throw e;
  }
}

function getNetInfo1() {
  document.getElementById("text1").innerText = "";

  apiGetRetry("/api/network/interfaces")
  .then(data => {
    document.getElementById("text1").innerText = data;
  })
  .catch(() => {
    document.getElementById("text1").innerText = "获取失败";
  });
}

function getNetInfo2() {
  document.getElementById("text2").innerText = "";

  apiGetRetry("/api/network/routes")
  .then(data => {
    document.getElementById("text2").innerText = data;
  })
  .catch(() => {
    document.getElementById("text2").innerText = "获取失败";
  });
}

function getNetInfo3() {
  document.getElementById("text3").innerText = "";
 
  apiGetRetry("/api/network/dns")
  .then(data => {
    document.getElementById("text3").innerText = data;
  })
  .catch(() => {
    document.getElementById("text3").innerText = "获取失败";
  });
}

let netLogLevel = "";
function setNetLogLevel() {
  const level = logLevel.value;

  fetch("/api/network/loglevel", {
    method: "POST",
    headers: {"Content-Type": "application/json"},
    body: JSON.stringify({level})
  })
  .then(async r => {
    if (!r.ok) throw new Error(await r.text());
    netLogLevel = level;
  })
  .catch(e => {
    logLevel.value = netLogLevel;
  });
}

function getNetLogLevel() {
  fetch("/api/network/loglevel")
  .then(async r => {
    if (!r.ok) throw new Error(await r.text());
    return r.json();
  })
  .then(d => {
    netLogLevel = d.log_level;
    logLevel.value = d.log_level;
  })
  .catch(e => {
    netLogLevel = "";
    logLevel.value = "";
  });
}

function initPage2() {
  getNetInfo1();
  getNetInfo2();
  getNetInfo3();
  getNetLogLevel();
  connectLog("yfkj-networkd.service", "text4");
}

function destroyPage2() {
  disconnectLog();
}