var data;
  
  document.bind("mobileinit", function() {
          
          if (navigator.platform=="iPhone" || navigator.platform=="iPad" ||
                  navigator.platform=="iPod" || navigator.platform=="iPad" ||
                  navigator.platform=="iPhone Simulator" ) {
                          
                  // It's an iOS device, we check if we are in chrome-less mode
                  if (!navigator.standalone) {
                          showIOSInvitation();
                  }
          }
          
          /* We capture the sessions page load to check dynamic session data */
          $("#sessions").live("pageshow", function() {
                  
                  if (window.localStorage!=undefined) {
                          // HTML5 Local Storage is available
                          if (window.localStorage.getItem("data")!=undefined &&
                                         window.localStorage.getItem("data")!=null) {
                                  // We first load the offline stored session information while checking updates
                                  showSessions(window.localStorage.getItem("data"));        
                                  $("#console").html("Checking data update");
                          } else {
                                  // There is no local storage cache
                                  $("#console").html("Downloading session data...");
                          }
                  } else {
                          // No HTML5 Local Storage, downloading JSON every time
                          $("#console").html("Downloading session data...");
                  }                
                                  
                  loadSessionsAjax();        
          });
          
  });
  
  function showIOSInvitation() {
          setTimeout(function() {
                  // We hide the saving information until the whole webapp is downloaded
                  $("#install").hide();
                  // We open the iOS instructions for adding to the homepage
                  $$.mobile.changePage($("#ios"), {transition: "slideup", changeHash: false});
          }, 100);
          
          setTimeout(function() {
                  $("#consoleInstall").html("Application downloaded");
                          $("#install").show();
          }, 1000)
          
          // We capture HTML5 Application Cache events to provide useful information
          if (window.applicationCache!=undefined) {
                  window.applicationCache.addEventListener('checking', function() {
                          $("#consoleInstall").html("Checking version");
                  });
  
                  window.applicationCache.addEventListener('downloading', function() {
                          $("#consoleInstall").html("Downloading applicaiton. Please wait...");
                  });
                  
                  window.applicationCache.addEventListener('cached', function() {
                          $("#consoleInstall").html("Application downloaded");
                          $("#install").show();
                  });
  
                  window.applicationCache.addEventListener('updateready', function() {
                          $("#consoleInstall").html("Application downloaded");
                          $("#install").show();
                  });
                  window.applicationCache.addEventListener('noupdate', function() {
                          $("#consoleInstall").html("Application downloaded");
                          $("#install").show();
                  });
                  window.applicationCache.addEventListener('error', function(e) {
                          $("#consoleInstall").html("There was an error downloading this app");                                                                                                                
                  });        
                  window.applicationCache.addEventListener('obsolete', function(e) {
                          $("#consoleInstall").html("There was an error downloading this app");                                                                                                                
                  });                                        
          } 
                                  
  }
  
  function loadSessionsAjax() {
          // We bring the JSON as text so it's easy to store in Local Storage
          .ajax(/*"http://www.mobilexweb.com/congress/*/"sessions.json", {
                  complete: function(xhr) {
                          if (window.localStorage!=undefined) {
                                  if (window.localStorage.getItem("data")!=undefined && window.localStorage.getItem("data")!=null) {
                                          if (xhr.responseText==window.localStorage.getItem("data")) {
                                                  // The new session downloaded is the same as the one in screen
                                                  $("#console").html("Schedule is updated");                                                
                                          } else {
                                                  // There is an update on the session data
                                                  if (confirm("There is an update in the schedule available, do you want to load it now?")) {
                                                          $("#console").html("Schedule is updated");        
                                                          showSessions(xhr.responseText);        
                                                  } else {
                                                          $("#console").html("Schedule will be updated later");                                                                                
                                                  }
                                          }
                                  } else {
                                          // Local Storage is available but no previous cache found
                                          $("#console").html("Schedule is updated");        
                                          showSessions(xhr.responseText);        
                                  }
                          } else {
                                  // No Local Storage, show the info without saving
                                  $("#console").html("Schedule is updated");        
                                  showSessions(xhr.responseText);                                                        
                          }
                  },
                  dataType: 'text',
                  error: function() {
                          $("#console").html("Schedule update could not be downloaded");        
                  }
          });
  }
  
  var isFirstLoad = true;
  
  function showSessions(string) {
          if (window.JSON!=undefined) {
                  data = JSON.parse(string);        
          } else {
              data = eval("(" + string + ")");        
          }        
          if (window.localStorage!=undefined) {
                  // Save the new data as string
                  window.localStorage.setItem("data", string);
          }
          
          $("#slots").html("");
          
          var html = "";
          for (var i=0; i<data.slots.length; i++) {
                  
                  if (data.slots[i].message!=null) {
                          // This is an special slot, so we create a divider
                          html += "<li data-role='list-divider' data-groupingtheme='e'>" + data.slots[i].time + ": " + data.slots[i].message  + "</li>";                                        
                  } else {
                          // This is a normal slot with sessions
                          html += "<li><a href='javascript:showDetails(" + i + ")'>Sessions of " + data.slots[i].time + "</a></li>";
                  }
          }
          
          $("#slots").html(html);
          
          if (isFirstLoad) {
                  $("#slots").listview();
                  isFirstLoad = false;
          } else {
                  $("#slots").listview('refresh');                                
          }
          
  }
  
  function showDetails(index) {                        
          $("#details h1").html("Sessions of " + data.slots[index].time);
          var html = ""
          for (var i=0; i<data.sessions.length; i++) {
                  if (data.sessions[i].timeId==data.slots[index].id) {
                          // We create one collapsible component per session
                          html += "<div data-role='collapsible'>";
                          html += "<h3>" + data.sessions[i].title + "</h3>";
                          html +=" <h3>" + data.sessions[i].room + "</h3>";
                          html += "<h4>Speaker/s: " + data.sessions[i].speaker;
                          html += "</h4>";
                          html += "<p>" + data.sessions[i].description + "</p>";        
                          html += "</div>";
                  }
          }
          // We provide the information to the details page
          $("#sessionInfo").html(html);
          $("#sessionInfo div").collapsible();
          
          // We change to the details page
          $$.mobile.changePage($("#details"));
  }
  
  function refresh() {
          $("#console").html("Verifying...");
          loadSessionsAjax();
  }
  
  function openWithoutInstallation() {
          // We remove the dialog-like iOS installation page
          .mobile.changePage($("#home"), {transition:"slideup", reverse:true});        
  }