const patterns = ["https://www.msn.com/*/news/*", "https://www.msn.com/*/tv/*","https://www.msn.com/*/movies/*" , "https://www.msn.com/*/sports/*", "https://www.msn.com/*/health/*", "https://www.msn.com/*/channel/*", "https://www.msn.com/*/travel/*", "https://www.msn.com/*/health/*", "https://www.msn.com/*/lifestyle/*"];
var found = 0;
var redirectUrl = ""; 
//Finds original article URL from DuckDuckGo dork.
async function findOrigUrl(title, site) {
    var siteUrl = await ddGet("https://duckduckgo.com/html/?q=" + site);
    console.log("Site Url: " + siteUrl);
    var articleUrl = await ddGet("https://duckduckgo.com/html/?q=title:" + title + " site:" + siteUrl);
    return articleUrl;
}

async function ddGet(url){
    var results = await fetch(url)
        .then(res => res.text());
    var resultParse = results.split("<!-- This is the visible part -->");
    var findUrl = resultParse[1].split('href="//duckduckgo.com/l/?uddg=');
    var extractUrl = findUrl[1].split('>');
    var trimUrl = extractUrl[0].split("&amp");
    var url = decodeURIComponent(trimUrl[0]);
    return url;
}

//Redirects the URL
async function redirect(requestDetails){
    if(requestDetails.method === "POST" && requestDetails.requestBody && found != 1){
        var rawData = requestDetails.requestBody.raw[0].bytes;
        const decoder = new TextDecoder("utf-8");
        var dataString = decoder.decode(rawData);
        var data = JSON.parse(dataString);
        var targetURL = "";
        if(data.data.page.content.brand){
            var brand = data.data.page.content.brand;
            var title = data.data.page.content.title;
            console.log(brand);
            targetUrl = await findOrigUrl(title, brand);
            console.log(targetUrl);
            redirectUrl = targetUrl;
            found = 1;
        }
    }
}

//Listener for any URL in the patterns list.
browser.webRequest.onBeforeRequest.addListener(
    redirect,
    { urls: [ "https://browser.events.data.msn.com/*" ], },
    ["blocking", "requestBody"]
);

browser.webRequest.onBeforeRequest.addListener(
    function (requestDetails){
        found = 0;
    },
    { urls: patterns },
    ["blocking"]
);

browser.browserAction.onClicked.addListener(
    function (){
        if(redirectUrl != ""){
            let creating = browser.tabs.create({
                url: redirectUrl,
            });
            redirectUrl = "";
            creating.then(onCreated, onError);
            
        }
        
});