import { VASTClient } from "@dailymotion/vast-client";
import xmlDom from "@xmldom/xmldom";
import fetch from "node-fetch";


const client = new VASTClient();

client.getParser().on("VAST-error", (err) => {
  console.log("VAST-error: ", err);
});

const getXML = (text) => {
  const parser = new xmlDom.DOMParser({
    errorHandler: (level, msg) => {
      throw new Error(`[Level: ${level}]: ${msg}`);
    },
  });

  const xml = parser.parseFromString(text, "text/xml");
  const err = xml
    ?.querySelector?.("parsererror")
    ?.querySelector?.("div")?.textContent;

  if (err) {
    throw new Error(err);
  }

  return xml;
};

// Expected:
// Should emit a 303 error since
// https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/single_ad_samples&sz=640x480&cust_params=sample_ct%3Dredirecterror&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&impl=s&nofb=1&correlator=
// will emit a 303 error

// Actual: No error is emitted
const expects303Error = `<VAST version="4.0" xmlns="http://www.iab.com/VAST">
<Ad id="20011" sequence="1" conditionalAd="false">
  <Wrapper followAdditionalWrappers="true" allowMultipleAds="1" fallbackOnNoAd="0">
    <AdSystem version="4.0">iabtechlab</AdSystem>
    <Error>http://example.com/error</Error>
    <Impression id="Impression-ID">http://example.com/track/impression</Impression>
    <Creatives>
      <Creative id="5480" sequence="1" adId="2447226">
        <CompanionAds>
          <Companion id="1232" width="100" height="150" assetWidth="250" assetHeight="200" expandedWidth="350" expandedHeight="250" apiFramework="VPAID" adSlotID="3214" pxratio="1400">
            <StaticResource creativeType="image/png">
              <![CDATA[https://www.iab.com/wp-content/uploads/2014/09/iab-tech-lab-6-644x290.png]]>
            </StaticResource>
            <CompanionClickThrough>
              <![CDATA[https://iabtechlab.com]]>
            </CompanionClickThrough>
          </Companion>
        </CompanionAds>
      </Creative>
    </Creatives>
    <VASTAdTagURI>
      <![CDATA[https://pubads.g.doubleclick.net/gampad/ads?iu=/21775744923/external/single_ad_samples&sz=640x480&cust_params=sample_ct%3Dredirecterror&ciu_szs=300x250%2C728x90&gdfp_req=1&output=vast&unviewed_position_start=1&env=vp&impl=s&nofb=1&correlator=]]>
    </VASTAdTagURI>
  </Wrapper>
</Ad>
</VAST>
`;

// Expected: Should throw an error since the root tag of the XML is not 'VAST'
// Actual: Parses successfully and emits a 301 (wrapper timeout)
const expectsThrowError = `
<VAST version="4.0" xmlns="http://www.iab.com/VAST">
<Ad id="20011" sequence="1" conditionalAd="false">
  <Wrapper followAdditionalWrappers="true" allowMultipleAds="1" fallbackOnNoAd="0">
    <AdSystem version="4.0">iabtechlab</AdSystem>
    <Error>http://example.com/error</Error>
    <Impression id="Impression-ID">http://example.com/track/impression</Impression>
    <Creatives>
      <Creative id="5480" sequence="1" adId="2447226">
        <CompanionAds>
          <Companion id="1232" width="100" height="150" assetWidth="250" assetHeight="200" expandedWidth="350" expandedHeight="250" apiFramework="VPAID" adSlotID="3214" pxratio="1400">
            <StaticResource creativeType="image/png">
              <![CDATA[https://www.iab.com/wp-content/uploads/2014/09/iab-tech-lab-6-644x290.png]]>
            </StaticResource>
            <CompanionClickThrough>
              <![CDATA[https://iabtechlab.com]]>
            </CompanionClickThrough>
          </Companion>
        </CompanionAds>
      </Creative>
    </Creatives>
    <VASTAdTagURI>
      <![CDATA[https://raw.githubusercontent.com/InteractiveAdvertisingBureau/VAST_Samples/master/VAST%201-2.0%20Samples/vast1Nonlinear.xml    ]]>
    </VASTAdTagURI>
  </Wrapper>
</Ad>
</VAST>`;

const test = expectsThrowError;

export function replaceUrlCorrelator(url) {
  const newURI = new URL(url);
  newURI.searchParams.set(
    "correlator",
    `${Math.floor(Math.random() * Date.now())}`
  );
  return newURI.toString();
}

async function urlHandlerGet(url, options) {
  const urlWithCorrelator = replaceUrlCorrelator(url);
  const response = await fetch(urlWithCorrelator, {
    ...options,
    credentials: options.withCredentials ? "include" : "omit",
  });
  const text = await response.text();

  return {
    document: getXML(text),
    original: text,
    status: response.status,
  };
}

const options = {
  resolveAll: true,
  wrapperLimit: 10,
  allowMultipleAds: true,
  urlHandler: {
    get: async (url, options) => {
      try {
        const result = await urlHandlerGet(url, options);
        console.log("Result from URL Handler for URL: ");
        console.log(url);
        return {
          xml: result.document,
          details: {
            byteLength: result.original.length,
            statusCode: result.status,
            rawXml: result.original,
          },
        };
      } catch (err) {
        console.log("Error from URL Handler for URL: ");
        console.log(url);
        console.log(err);
        return {
          error: err,
        };
      }
    },
  },
};

const parse = async () => {
  const vastXml = getXML(test);

  client
    .parseVAST(vastXml, options)
    .then((res) => {
      console.log("Parsed!! ");
      console.log(res);
    })
    .catch((err) => {
      console.log("Error! ", err);
    });
};

parse();