// Initialize deferredPrompt for use later to show browser install prompt.
let deferredPrompt;

window.addEventListener('beforeinstallprompt', (e) => {
	/*
  // Prevent the mini-infobar from appearing on mobile
  e.preventDefault();
  // Stash the event so it can be triggered later.
  deferredPrompt = e;
  // Update UI notify the user they can install the PWA
  showInstallPromotion();
  // Optionally, send analytics event that PWA install promo was shown.
  console.log(`'beforeinstallprompt' event was fired.`);
  */
	var formData = new FormData();
	var token = document.getElementById("track-token").content;
	formData.append("trackToken",token);
	formData.append("action","beforeinstallprompt");
	navigator.sendBeacon("https://online-wunsch-liste.de/api/track-pwa.php",formData);
});


window.addEventListener('appinstalled', () => {
	/*
	  // Hide the app-provided install promotion
	  hideInstallPromotion();
	  // Clear the deferredPrompt so it can be garbage collected
	  deferredPrompt = null;
	  // Optionally, send analytics event to indicate successful install
	  console.log('PWA was installed');
	  */
	
	var formData = new FormData();
	var token = document.getElementById("track-token").content;
	formData.append("trackToken",token);
	formData.append("action","appinstalled");
	navigator.sendBeacon("https://online-wunsch-liste.de/api/track-pwa.php",formData);
	});

function getPWADisplayMode() {
  const isStandalone = window.matchMedia('(display-mode: standalone)').matches;
  if (document.referrer.startsWith('android-app://')) {
    return 'pwa';
  } else if (navigator.standalone || isStandalone) {
    return 'standalone';
  }
  return 'browser';
}

function loadModules(){
	if(getPWADisplayMode()=='browser'){
		dynamicallyLoadScript("https://online-wunsch-liste.de/js/main.php?v=29.09.2023.1");
	}else{
		dynamicallyLoadScript("https://online-wunsch-liste.de/js/main-pwa.php?v=29.09.2023.1");
	}
	
	if(!checkCookieExists("webAppId")){
		setCookie("webAppId", create_UUID(), 1825);
	}
	
}

function create_UUID(){
    var dt = new Date().getTime();
    var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
        var r = (dt + Math.random()*16)%16 | 0;
        dt = Math.floor(dt/16);
        return (c=='x' ? r :(r&0x3|0x8)).toString(16);
    });
    return uuid;
}
function dynamicallyLoadScript(url) {
    var script = document.createElement("script");  // create a script DOM node
    script.src = url;  // set its src to the provided URL
   
    document.head.appendChild(script);  // add it to the end of the head section of the page (could change 'head' to 'body' to add it to the end of the body section instead)

    script.onload = function() {
    	initTracking();
      };
}

function checkCookieExists(name) {
  let cookie = getCookie(name);
  if (cookie != "") {
   return true;
  } else {
    return false;
  }
}
function getCookie(cname) {
  let name = cname + "=";
  let ca = document.cookie.split(';');
  for(let i = 0; i < ca.length; i++) {
    let c = ca[i];
    while (c.charAt(0) == ' ') {
      c = c.substring(1);
    }
    if (c.indexOf(name) == 0) {
      return c.substring(name.length, c.length);
    }
  }
  return "";
}
function setCookie(cname, cvalue, exdays) {
  const d = new Date();
  d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
  let expires = "expires="+d.toUTCString();
  document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}