const jsdom = require("jsdom");
const { JSDOM } = jsdom;
const fs = require('fs');
const { updateURLLink } = require('./common');

const target = "RASPBIAN_IMAGE_URL";

// Read the input file, and parse the variable input
try {
    const data = fs.readFileSync('../test/run-tests.sh', 'utf8')
          .split('\n')
          .filter(line => line.match(`${target}=.*`));
    var line = data[0];
    console.log(line);
    var reg = "raspbian_lite-(?<date>[0-9]{4}-[0-9]{2}-[0-9]{1,2})/(?<updated>[0-9]{4}-[0-9]{2}-[0-9]{1,2}).*$";
    var m = line.match(".*=\"(?<url>[a-zA-Z-://\._]*)(?<imageName>raspbian_lite-[0-9]{4}-[0-9]{2}-[0-9]{1,2})/(?<updated>[0-9]{4}-[0-9]{2}-[0-9]{1,2}).*$");
    console.log(m);
    var url = m.groups.url;
    var imageName = m.groups.imageName;
    var updated = m.groups.updated;
} catch (err) {
    console.error(err);
    process.exit(1);
}

function getNewRaspbian(url) {
    console.log("getNewRaspbian");
    console.log(`${url}`);
    return JSDOM.fromURL(url, {}).then(dom => {
        var document = dom.window.document;
        var refs = document.getElementsByTagName("a");
        var test = Array.from(refs)
            .filter(ref => ref.textContent.match(("raspbian-.*-lite.*\.zip$")))
            .reduce((acc, element) => {
                acc.push(element.textContent.match("raspbian-.*-lite.*\.zip$").input);
                return acc;
            }, [])[0];
        return `${target}=\"${url}/${test}\"`;
    });
}


JSDOM.fromURL(url, {}).then(dom => {
    var document = dom.window.document;
    var table = document.getElementsByTagName("table");
    var rows = table[0].rows;
    var matches = [];
    for (var i=0; i< rows.length; i++) {
        var rowText = rows[i].textContent;
        var regMatch = rowText.match(reg);
        if (regMatch) {
            matches.push(regMatch);
        }
    }
    // Sort the accumulated matches
    matches.sort(function(a,b) {
        let al = Date.parse(a.groups.date);
        let bl = Date.parse(b.groups.date);
        if (al == bl) {
            let ad = Date.parse(a.groups.updated);
            let bd = Date.parse(b.groups.updated);
            return bd - ad;
        }
        return bl - al;
    });
    var matchOn = matches[0].input.split("/")[0];
    if (matchOn !== imageName) {
        // We also need to extract the new image name from the index folder, as
        // dated folders contain images with different dates in them o_O
        console.error("We've got a new release! \\o/");
        var newVar = getNewRaspbian(`${url}${matches[0].input.split(" ")[0].split("/").slice(0, -1)}`)
            .then(res => {
                console.log(`New release: ${res}`);
                updateURLLink(res, target);
            });
    }
});