var mapScriptCreated = 0;
var mapCssCreated = 0;
var mapScriptLoaded = 0;
var mapCssLoaded = 0;
var mapLoadList = [];
function showLazyMap(fname) {
    if (mapScriptLoaded == 1 && mapCssLoaded == 1) {
        if (!mapLoadList.includes(fname)) {
            window[fname]();
            mapLoadList.push(fname);
        }
    }
}
(function fn() {
    var pics = document.querySelectorAll('.no-js-hide');
    pics.forEach(function(pic) {
        pic.classList.toggle('no-js-hide');
    });
    var lazyImages = [].slice.call(document.querySelectorAll(".lazeeload"));
    if ("IntersectionObserver" in window) {
        const config = {
            root: null,
            rootMargin: '1000px',
            threshold: 0
        };
        let lazyImageObserver = new IntersectionObserver(function(entries, observer) {
            entries.forEach(function(entry) {
                if (entry.isIntersecting) {
                    let lazyImage = entry.target;
                    if (lazyImage.dataset.src) {lazyImage.src = lazyImage.dataset.src;}
                    if (lazyImage.dataset.srcset) {lazyImage.srcset = lazyImage.dataset.srcset;}
                    if (lazyImage.dataset.map) {
                        const fname = "initMapbox_"+lazyImage.dataset.map;
                        if (mapScriptLoaded == 0) {
                        
                            let script = document.createElement('script');
                            script.async=true;
                            script.defer=true;
                            script.src = "https://api.mapbox.com/mapbox-gl-js/v3.0.0/mapbox-gl.js";
                            script.onload = function(){
                                mapScriptLoaded = 1;
                                showLazyMap(fname);
                            }
                            document.head.appendChild(script);
                            mapScriptCreated = 1;
                            let css = document.createElement('link');
                            css.rel = "stylesheet";
                            css.href = "https://api.mapbox.com/mapbox-gl-js/v3.0.0/mapbox-gl.css";
                            css.onload = function(){
                                mapCssLoaded = 1;
                                showLazyMap(fname);
                            }
                            document.head.appendChild(css);
                            mapCssCreated = 1;
                        } else {
                            if (typeof window[fname] === 'function') {
                                window[fname]();
                            }
                            showLazyMap(fname);
                        }                      
                    }
                    lazyImage.classList.remove("no-js-hide");
                    lazyImage.classList.remove("lazeeload");
                    lazyImageObserver.unobserve(lazyImage);
                }
            });
        }, config);

        lazyImages.forEach(function(lazyImage) {
            lazyImageObserver.observe(lazyImage);
            lazyImage.classList.add("lazeeload-activated");
        });
    } else {
        let active = false; 
        const lazyLoad = function() {
            if (active === false) {
            active = true;

            setTimeout(function() {
                lazyImages.forEach(function(lazyImage) {
                if ((lazyImage.getBoundingClientRect().top <= window.innerHeight+1000 && lazyImage.getBoundingClientRect().bottom >= 0) && getComputedStyle(lazyImage).display !== "none") {
                    if (lazyImage.dataset.src) lazyImage.src = lazyImage.dataset.src;
                    if (lazyImage.dataset.srcset) lazyImage.srcset = lazyImage.dataset.srcset;
                    if (lazyImage.dataset.onload) lazyImage.onload = lazyImage.dataset.onload;
                    lazyImage.classList.remove("lazeeload");
                    lazyImages = lazyImages.filter(function(image) {
                        return image !== lazyImage;
                    });
                    if (lazyImages.length === 0) {
                    document.removeEventListener("scroll", lazyLoad);
                    window.removeEventListener("resize", lazyLoad);
                    window.removeEventListener("orientationchange", lazyLoad);
                    }
                }
                });

                active = false;
            }, 200);
            }
        };
        document.addEventListener("scroll", lazyLoad);
        window.addEventListener("resize", lazyLoad);
        window.addEventListener("orientationchange", lazyLoad);
    } 
    var lazyImages = [].slice.call(document.querySelectorAll(".lazeeload"));
    i=1;
    lazyImages.forEach(function(lazyImage) {
        if (!(lazyImage.classList.contains("lazeeload-activated"))) {
            if (lazyImage.dataset.src) lazyImage.src = lazyImage.dataset.src;
            if (lazyImage.dataset.srcset) lazyImage.srcset = lazyImage.dataset.srcset;
            lazyImage.classList.remove("lazeeload");
        }
    });
})();