// initialize default value
function getTheme(){
    return localStorage.getItem('theme') ? localStorage.getItem('theme') : null;
}

function setTheme(style){
    document.documentElement.setAttribute('data-theme', style);
    localStorage.setItem('theme', style);  
}

function init(){
    // initialize default value
    var theme = getTheme();

    // check if a prefered color theme is set for users that have never been to our site
    const userPrefersDark = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
    if (theme === null) {
        if(userPrefersDark){
            setTheme('dark');
        }
        else if(!document.documentElement.getAttribute('data-theme')){
            setTheme('light');
        }
        else{
            setTheme(document.documentElement.getAttribute('data-theme'));
        }
    }
    else {
        // load a stored theme
        if (theme == 'light') {
            document.documentElement.setAttribute('data-theme', 'light');
        }
        else {
            document.documentElement.setAttribute('data-theme', 'dark');
        }    
    }    
}


// switch themes
function switchTheme(e) {
    var theme = getTheme();
    if (theme == 'light') {
        setTheme('dark');
    }
    else {
        setTheme('light');
    }
}

document.addEventListener('DOMContentLoaded', function() {
    var themeSwitcher = document.querySelector('.theme-switch');
    themeSwitcher.addEventListener('click', switchTheme, false);
}, false);

document.addEventListener("DOMContentLoaded", function () {
// Get all "navbar-burger" elements
var $navbarBurgers = Array.prototype.slice.call(document.querySelectorAll(".navbar-burger"), 0);
// Check if there are any navbar burgers
if ($navbarBurgers.length > 0) {
    // Add a click event on each of them
    $navbarBurgers.forEach(function ($el) {
    $el.addEventListener("click", function () {
        var target = $el.dataset.target;
        var $target = document.getElementById(target);
        $el.classList.toggle("is-active");
        $target.classList.toggle("is-active");
    });
    });
}
});

init();