var duplicateSlots = new function() {

  // this variable will contain all the org details, and filled

  // incrementally

  var orgs_details = {};

  // this variable will contain all student/proposal data details,

  // filled incrementally

  var assigned_proposals = new Array();

  // public function to begin iterating load of JSONs and then call printing

  // of duplicates

  this.showDuplicatesInit = function() {

    // Remember this object for Javascript scoping

    var this_object = this;

    var NUMBER_OF_ORGS = number_of_orgs;

    var OFFSET_LENGTH = offset_length;

    // Variables to handle progress bar updating

    var ITERATIONS = (number_of_orgs % offset_length)==0 ? Math.floor(number_of_orgs/offset_length) : Math.floor(number_of_orgs/offset_length)+1;

    var successful_calls = 0;

    $("#id_button_duplicate_slots").fadeOut("slow",

      function() {

        $("#duplicates_progress_bar").progressBar(0);

        $("#description_done").html("");

        // For every ajax success, bind this function to update user feedback

        $(this).bind("ajaxSuccess", function() {

          successful_calls++;

          var percentage = Math.floor(100 * (successful_calls) / (ITERATIONS));

          $("#duplicates_progress_bar").progressBar(percentage);

          $("#description_progressbar").html(" Processed orgs chunk " + (successful_calls) + "/" + ITERATIONS);

          // If this is the last call, feedback the user and print the duplicates data

          if (successful_calls==ITERATIONS) {

            $("#applications_progress_bar").fadeOut("slow",

              function() {

                $("#duplicates_progress_bar").progressBar(0);

                $("#id_button_duplicate_slots").fadeIn("slow");

              }

            );

            $("#description_progressbar").html("");

            $("#description_done").html("<strong> Done!</strong>");

            $("#duplicates_progress_bar").fadeOut("slow",

              function() {

                $("#id_button_duplicate_slots").val("Recalculate").fadeIn("slow",

                  function() {

                    // Call printing to HTML function with correct scope

                    printDuplicatesAndSendJSON.call(this_object);

                  }

                );

              }

            );

          }

        });

        // Call the showDuplicates function for the first time with correct scope

        $("#duplicates_progress_bar").fadeIn("slow", showDuplicates.apply(this_object,[url_to_query,OFFSET_LENGTH,NUMBER_OF_ORGS]));

      }

    );

  }

  function showDuplicates(url_to_query,OFFSET_LENGTH,NUMBER_OF_ORGS) {

    var current_offset = 0;

    // Here Ajax call is handled

    setTimeout(function() {

      $.ajax({

        cache:false,

        mode: "sync",

        type: "POST",

        timeout: 1000000,

        dataType: "json",

        url: "/program/assigned_proposals/"+url_to_query+"?limit="+OFFSET_LENGTH+"&offset="+current_offset+"&_="+(new Date().getTime()),

        success: function (data, textStatus) {

          if (data) {

            // Load JSON data

            loadSingleJSONData(data);

          }

        },

        error: function(XMLHttpRequest, textStatus, errorThrown) {

          // if there is an error return the button and leave a try again message

          if (XMLHttpRequest!=undefined) {

            $("#id_button_duplicate_slots").fadeIn("slow", function() {

	      $("#description_done").html("<strong class='error'> Error encountered, try again</strong>");

            });

          }

       }

      });

      current_offset+=OFFSET_LENGTH;

      if (current_offset<NUMBER_OF_ORGS) {

        setTimeout(arguments.callee,1);

      }

    },1);

    // This prevent page reloading after each ajax call

    return false;

  }

  // private function to load a JSON and pushing the data to the

  // private global variables

  function loadSingleJSONData(data) {

    if (data) {

      // pushing org details

      for (var org_key in data.data.orgs) {

        orgs_details[org_key] = data.data.orgs[org_key];

      }

      // pushing proposals

      $(data.data.proposals).each(

        function(intIndex, proposal) {

          // if this student_key is not yet present

          if (assigned_proposals[proposal.student_key]==undefined) {

            // create the object and insert general info

            assigned_proposals[proposal.student_key] = {};

            assigned_proposals[proposal.student_key].name = proposal.student_name;

            assigned_proposals[proposal.student_key].contact = proposal.student_contact;

            assigned_proposals[proposal.student_key].proposals = new Array();

          }

          // anyway, push the accepted proposals

          assigned_proposals[proposal.student_key].proposals.push(

            {

              "org_key" : proposal.org_key,

              "proposal_key" : proposal.key_name,

              "proposal_title": proposal.proposal_title

            }

          );

        }

      );

    }

  }

  // private function to generate the JSON to send for caching and calling

  // the actual function that will print the data

  function printDuplicatesAndSendJSON() {

    // JSON skeleton that need to be sent to the server

    var to_json = {

      "data": {

        "orgs" : orgs_details,

        "students": {}

      }

    }

    // for every student...

    for (var student_key in assigned_proposals) {

      var accepted_proposals = assigned_proposals[student_key].proposals.length;

      // if accepted proposal are less than 2, then ignore and continue the iteration

      if (accepted_proposals<2) continue;

      var student = assigned_proposals[student_key];

      // push this student to the caching JSON

      to_json.data.students[student_key] = student;

      var proposals = student.proposals;

      // call the function that prints the output html

      this.showDuplicatesHtml(orgs_details,student,student_key,proposals);

    }

    if (html_string=="") {

      $("#div_duplicate_slots").html("<strong>No duplicate slots found</strong>");

    }

    // at the end, send the JSON for caching purposes

    $.ajax({

      url: location.href,

      type: 'POST',

      processData: true,

      data: {result: JSON.stringify(to_json)},

      contentType: 'application/json',

      dataType: 'json',

    });

  }

  // public function to output actual HTML out of the data (cached or not)

  this.showDuplicatesHtml = function(orgs_details,student,student_key,proposals) {

      html_string='<ul>';

    }

    html_string+= '<li>Student: <strong><a href="/student/show/'+student_key+'">'+student.name+'</a></strong> (<a href="mailto:'+student.contact+'">'+student.contact+'</a>)';

    html_string+='<ul>';

    $(proposals).each(

      function (intIndex, proposal) {

        html_string+='<li>Organization: <a href="/org/show/'+proposal.org_key+'">'+orgs_details[proposal.org_key].name+'</a>, admin: '+orgs_details[proposal.org_key].admin_name+' (<a href="mailto:'+orgs_details[proposal.org_key].admin_email+'">'+orgs_details[proposal.org_key].admin_email+'</a>)</li>';

        html_string+='<ul><li>Proposal: <a href="/student_proposal/show/'+proposal.proposal_key+'">'+proposal.proposal_title+'</a></li></ul>';

      }

    );

    html_string+='</ul></li>';

    html_string+='</ul>';

    $("#div_duplicate_slots").html(html_string);

  }

}