var START = 1;
var count = 0;
var degreeId = "";
var collegeId = "";
var departmentId = "";


var SECTION_STATUS_DESC = [
              "",
              "متاحة",
"ملغاة",
              "مغلقة"
              ];
var SECTION_STATUS_STYLE = [
              "",
              "",
              "background: blue; color:white; font-weight: bold;",
              "background: red; color:white; font-weight: bold;"
              ];


function getBlockCode(blockId,title,content){
  var code ='<div id="' + blockId + '" class="info">\n'
           + '<h2>' + title + '</h2>\n'
           + content + '\n'
           + '</div>\n';
  return code;
}


function doChangeDepartment(selectObject){
  
}

function doChangeCollege(selectObject){
  populate(document.getElementById("department"),getDepartments(document.getElementById("college").value));
}

function doChangeDegree(selectObject){
  
}

function doOnLoad(){
  populate(document.getElementById("degree"),getDegrees());
  populate(document.getElementById("college"),getColleges());
  populate(document.getElementById("department"),getDepartments(document.getElementById("college").value));
}

function populate(selectElement,list){
  selectElement.options.length = list.length; 
  for(var i=0;i<list.length;i++){
    selectElement.options[i] = new Option(list[i].name, list[i].id, i==0, i==0);
  }
}



function doSearch(pageNo,start){
  degreeId = document.getElementById("degree").value;
  collegeId = document.getElementById("college").value;
  departmentId = document.getElementById("department").value;
  
  count = getCoursesPagesCount(degreeId,collegeId,departmentId);
  
  doView(START);
}


function doView(pageNo){
  var courses = getCourses(degreeId,collegeId,departmentId,pageNo);
  showCourses(pageNo,courses);
}

function showCourses(pageNo,courses){
  document.getElementById("workspace").innerHTML = getCoursesCode(pageNo,courses);
}


function getCoursesCode(pageNo,courses){
  var code = ""; 
  var color = "038338";
  var fontColor = "#FFFFFF";

  if(typeof courses != "undefined" && courses.length > 0){
    code = "<center>"
         + (count>1?getBarCode(degreeId,collegeId,departmentId,pageNo):"")
         + "<br>"
         + "<table style='font-weight:bold;margin-left: 5px;margin-right: 5px;font-size: 14px' border='1'>\n"
         + "<tr>\n"
         + "<td width='50px' style='color:" + fontColor + "' bgcolor='#" + color + "'>رقم المادة</td>"
         + "<td width='200px' style='color:" + fontColor + "' bgcolor='#" + color + "'>اسم المادة</td>"
         + "<td width='10px' style='color:" + fontColor + "' bgcolor='#" + color + "'>س.</td>"
         + "<td width='10px' style='color:" + fontColor + "' bgcolor='#" + color + "'>ش.</td>"
         + "<td width='200px' style='color:" + fontColor + "' bgcolor='#" + color + "'>الاوقات</td>"
         + "<td width='150px' style='color:" + fontColor + "' bgcolor='#" + color + "'>المحاضرين</td>"
         + "<td width='150px' style='color:" + fontColor + "' bgcolor='#" + color + "'>القاعات</td>"
         + "<td width='10px' style='color:" + fontColor + "' bgcolor='#" + color + "'>الحالة</td>"
         + "<td width='100px' style='color:" + fontColor + "' bgcolor='#" + color + "'>ملاحظات</td>"
         + "</tr>";
    for(var i=0;i<courses.length;i++){
      code += "<tr>\n"
            + "<td valign='top'>" + courses[i].no + "</td>"
            + "<td valign='top' nowrap>" + courses[i].name + "</td>"
            + "<td valign='top'>" + courses[i].hours + "</td>"
            + "<td valign='top'>" + courses[i].sectionNo + "</td>"
            + "<td valign='top' nowrap>" + courses[i].times + "</td>"
            + "<td valign='top' nowrap>" + courses[i].lecturers + "</td>\n"
            + "<td valign='top'>" + courses[i].rooms + "</td>\n"
            + "<td valign='top' style='" + SECTION_STATUS_STYLE[courses[i].status] + "'>" + SECTION_STATUS_DESC[courses[i].status] + "</td>\n"
            + "<td valign='top'>" + courses[i].remarks + "</td>\n";
            + "<tr>\n";
    }
    code += "</table>\n"
          + "<br>\n"
          + (count>1?getBarCode(degreeId,collegeId,departmentId,pageNo):"")
          + "<br>\n"
          + "</center>\n";
  }else{
    code = "<center>" 
         + "<h1 style='color:red'>"
         + "لا يوجد مواد مطروحة لهذا القسم"
         + "</h1>"
         + "</center>";
  }

  return getBlockCode("","",code);
}

function getBarCode(degreeId,collegeId,departmentId,pageNo){
  var endPageIndex = count - (1-START);
  var code = "<table border='0' cellpadding='0' cellspacing='10'><tr>"
  if(pageNo != ""+START){
    var prevPageNo = parseInt(pageNo) - 1;

    code += "<td>"
          + "<a href=\"javascript:doView('" + prevPageNo + "')\">"
          + "السابق"
          + "</a>"
          + "</td>";  
  }

  for(var i=START;i<=endPageIndex;i++){
    var viewPageIndex = i + (1-START);
    code += "<td>";
    if(pageNo != i)
      code += "<a href=\"javascript:doView('" + i + "')\">"
    code += viewPageIndex;
    if(pageNo != i)
      code += "</a>"
    code += "</td>";
  }
  if(pageNo!=""+endPageIndex){
    var nextPageNo = parseInt(pageNo) + 1;

    code += "<td>"
          + "<a href=\"javascript:doView('" + nextPageNo + "')\">"
          + "التالي"
          + "</a>"
          + "</td>";  
  }
  code += "</tr></table>";
  
  return code;
}
/**********************************************************************************************************************************/

function doCheck(elementObject){
  var indexCode = elementObject.id.substring(elementObject.id.length-2);
  var elementName = "past_mark"+indexCode;
  if(!elementObject.disabled && elementObject.checked)
    document.getElementById(elementName).disabled="";
  else
    document.getElementById(elementName).disabled="disabled";
}

function doCheckLine(elementObject){
  var ids = ["hours","mark","course_repeated"];
  
  var indexCode = elementObject.id.substring(elementObject.id.length-2);
  var disabledCode = "";

  if(elementObject.checked)
    disabledCode="";
  else
    disabledCode="disabled";
    
    
  for(var i=0;i<ids.length;i++)
    document.getElementById(ids[i] + indexCode).disabled=disabledCode;

  doCheck(document.getElementById(ids[ids.length-1] + indexCode));
}


function validate(){
  var totalHoursId = "total_hours";
  var finalAverageId = "final_average";
  var totalHours = getInteger(document.getElementById(totalHoursId).value);
  if(totalHours<0){
    alert("الرجاء ادخال عدد الساعات المقطوعة بشكل صحيح");
    return false;
  }
  var finalAverage = getFloat(document.getElementById(finalAverageId).value);
  if(finalAverage<0 || finalAverage>4.0 || (totalHours==0 && finalAverage>0)){
    alert("الرجاء ادخال المعدل الحالي بشكل صحيح");
    return false;
  }
  
  return true;
  
}
  


function doCalc(){
  if(!validate())
    return;
  var totalHoursId = "total_hours";
  var finalAverageId = "final_average";
  var calculatedTotalHoursId = "cal_total_hours";
  var calculatedFinalAverageId = "cal_final_average";
  
  var ids = ["course_","hours_","mark_","course_repeated_","past_mark_"];
  
  var totalHours = 0;
  var finalAverage = 0.0;
  
  totalHours = parseInt(document.getElementById(totalHoursId).value);
  finalAverage = parseFloat(document.getElementById(finalAverageId).value);
  
  var total = totalHours * finalAverage;
  
  for(var i=0;i<10;i++){
    if(document.getElementById(ids[0] + i).checked){
      if(document.getElementById(ids[3] + i).checked){
        totalHours-=parseInt(document.getElementById(ids[1] + i).value);
        total-=parseInt(document.getElementById(ids[1] + i).value)*parseFloat(document.getElementById(ids[4] + i).value);
      }
      totalHours+=parseInt(document.getElementById(ids[1] + i).value);
      total+=parseInt(document.getElementById(ids[1] + i).value)*parseFloat(document.getElementById(ids[2] + i).value);
    }
  }
  
  total = total/totalHours;
  
  if(totalHours<0 || total<0 || total>4.0){
    alert("إدخال غير منطقي لعدد الساعات المقطوعة أو المعدل الحالي");
    document.getElementById(calculatedTotalHoursId).value = "";
    document.getElementById(calculatedFinalAverageId).value = "";
    return;
  }
  total = Math.round(total*100.0)/100;
  document.getElementById(calculatedTotalHoursId).value = totalHours;
  document.getElementById(calculatedFinalAverageId).value = total;
}