function randomBackground(backgrounds) {
    let background = selectRandom(backgrounds);
    console.log("Choosen random background image:", background);

    if (!background.includes("backgrounds/")) {
        background = "backgrounds/" + background
    }

    document.getElementById("background").style.backgroundImage = "url(" + background + ")";
//    let div_height = document.getElementById("background").offsetHeight;
//    let half_div_height = (0 - div_height) / 2;
//    document.getElementById("background").style.backgroundPosition = "0% " + half_div_height.toString() + "px";
}

function selectRandom(array) {
    let choosen = array[Math.floor(Math.random() * array.length)];
    return choosen;
}

function copyText(text) {
    try {
        navigator.clipboard.writeText(text);
        console.log('Content copied to clipboard: "' + text + '"');
    } catch (error) {
        console.error('Failed to copy "' + text + '":', error);
    }
}

function strBetweenStrings(startStr, endStr, str) {
    pos = str.indexOf(startStr) + startStr.length;
    return str.substring(pos, str.indexOf(endStr, pos));
}

function getStringOfPageContent(url, callbackFunction) {
    $.get(url, function(data) {
        callbackFunction(data);
    });
};

function getFilesInFolder(pageContent) {  // Needs auto file indexing
    // console.log(pageContent);
    let contentArray = pageContent.split("\n");

    let files = [];

    for (let line in contentArray) {
        if (contentArray[line].includes("<li>")) {
            files.push(strBetweenStrings('"', '"', contentArray[line]));
        }
    }

    files.shift();
    // console.log(files);

    return files;
};

function setBackground(bla = "") {
    let currentDate = new Date();
    let currentMonth = currentDate.getMonth();
    let currentDay = currentDate.getDay();

    if (currentMonth == 9) {
        if (currentDay > 0 && currentDay < 20) {
            getStringOfPageContent(bla + "backgrounds/halloween", function(pageContent) {
                let backgrounds = getFilesInFolder(pageContent);

                let backgroundNumber = 0;

                while (backgroundNumber < backgrounds.length) {
                    backgrounds[backgroundNumber] = bla + "backgrounds/halloween/" + backgrounds[backgroundNumber];

                    backgroundNumber++;
                }

                randomBackground(backgrounds);
            });

        }
    } else {
        getStringOfPageContent("backgrounds", function(pageContent) {
            let backgrounds = getFilesInFolder(pageContent);
            randomBackground(backgrounds);
        });

    }
}

// getStringOfPageContent("backgrounds", getFilesInFolder)