// Global variables
var runningAJAX=0;
var imageAJAX = new Image();

function runAJAX(theScript,theVars,theAction,theTarget,theFinal) {
  if (!runningAJAX) { doLoading(); }
  runningAJAX++;
  var xmlhttp;
  if(window.XMLHttpRequest) {
    xmlhttp = new XMLHttpRequest();
  }
  else if(window.ActiveXObject) {
    xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
  }
  else { alert('AJAX HTTP not supported'); }

  var theVarString='';
  for (i=0; i<theVars.length; i++) {
    theVarString+=theVars[i];
    if (i<theVars.length-1) { theVarString+='&'; }
  }

  var url='ajax/'+theScript;
  if (theScript.match(/^admin/)) { url='admin/'+theScript; }
  if (url.match(/admin\//)) { longAsk=0; }
//  xmlhttp.open('GET',url,true);
//  var url='ajax/'+theScript+'?'+theVar+'='+escape(theVal);
  xmlhttp.open('POST',url,true);
  xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
  xmlhttp.setRequestHeader("Content-length", theVarString.length);
  xmlhttp.setRequestHeader("Connection", "close");
  xmlhttp.send(theVarString);

  xmlhttp.onreadystatechange=function() {
    if (xmlhttp.readyState==4) {
      if (xmlhttp.status==200) {
        if (theAction=='eval') { eval(xmlhttp.responseText); }
        else if (theAction=='write') {
          var theElem=document.getElementById(theTarget);
          if (theElem) theElem.innerHTML=xmlhttp.responseText;
          else theFinal=null;
        }
        else if (theAction=='alert') { alert(xmlhttp.responseText); }
        else if (theAction=='test') { }
        else { alert('AJAX: action error on '+theAction); }
        if (theFinal) { eval(theFinal); }
      }
      else if (xmlhttp.status==401) {
        alert('Authorization failed');
        if (theFinal) { eval(theFinal); }
      }
      else if (xmlhttp.status==404) {
        alert('File '+url+' does not exist');
      }
      else { alert('AJAX: HTTP error '+xmlhttp.status); }
      runningAJAX--;
      if (!runningAJAX) { doneLoading(); }
      if (runningAJAX<0) { runningAJAX=0; }
    }
  }
  try { xmlhttp.send(null); }
  catch (err) { }
  return(false);
}

function getFile(filename,divname,donefunc) {
  runAJAX(filename,'','write',divname,donefunc);
}

// This one is kinda special: donefunc will be invoked with the value of
//  xmlhttp.status
function testFile(filename,donefunc) {
  donefunc=donefunc.replace(/\(.*\)/,'(xmlhttp.status)');
  runAJAX(filename,'','test','',donefunc);
}

function getCalendar(year,previous,print) {
  if (year-previous<1978) { year=1978+previous; }
  if (previous==null) { previous=0; }
  var vars=new Array();
  var string=year;
  while (previous>0 && year >= 1978) {
    year--;
    string+='|'+year;
    previous--;
  }
  vars.push('years='+string);
  if (getCookie('showcolor')==1) { vars.push('color=location'); }
  else if (getCookie('showcolor')==2) { vars.push('color=availability'); }
  else { vars.push('color=backups'); }
  if (getCookie('showsats')==3) { vars.push('sats=other'); }
  else if (getCookie('showsats')==2) { vars.push('sats=goes'); }
  else { }
  vars.push('admin='+isAdmin());
  if (print==null)
    runAJAX('search_calendar.php',vars,'write','search_body','initCalendar()');
  else
    runAJAX('search_calendar.php',vars,'print');
}

function getMonth(year,month,satellite) {
  var vars=new Array();
  vars.push('year='+year);
  vars.push('month='+month);
  vars.push('satellite='+satellite);
  if (satellite==null) { vars.push('color=none'); }
  else {
    if (getCookie('showcolor')==1) { vars.push('color=location'); }
    else if (getCookie('showcolor')==2) { vars.push('color=availability'); }
    else { vars.push('color=backups'); }
  }
  runAJAX('search_calendar.php',vars,'write','floater_body','floaterLoading=0');
}

function getManual() {
  var vars=new Array();
  if (getCookie('showsats')==3) { vars.push('sats=other'); }
  else if (getCookie('showsats')==2) { vars.push('sats=goes'); }
  else { }
  runAJAX('search_manual.php',vars,'write','search_body','initManual()');
}

function getDateCalendar(thisElem,thatElem,year,month) {
  var vars=new Array();
  vars.push('thisElem='+thisElem.id);
  vars.push('thatElem='+thatElem.id);
  vars.push('year='+year);
  vars.push('month='+month);
  runAJAX('jscalendar.php',vars,'write','floater_body','floaterLoading=0');
}

function getThumbnail(thumb,full) {
  imageAJAX=new Image();
  imageAJAX.src=thumb;
  waitThumbnail(full);
}
function waitThumbnail(full) {
  if (!imageAJAX.complete) setTimeout('waitThumbnail("'+full+'")', 250);
  else gotThumbnail(full);
}
function gotThumbnail(full) {
  var html ='<a target=_new href="'+full+'">';
      html+='<img alt="" id="floater_thumbnail" ';
      html+=' style="border:1px solid black;width:99%;"></a>';
  document.getElementById('floater_body').innerHTML=html;
  document.getElementById('floater_thumbnail').src=imageAJAX.src;
  floaterLoading=0;
}

function getProblems(sat,date,time,type) {
  var vars=new Array();
  vars.push('float=problems');
  vars.push('offsettz='+offsetTZ);
  vars.push('sat='+sat);
  vars.push('date='+date);
  vars.push('time='+time);
  vars.push('type='+type);
  runAJAX('results_float.php',vars,'write','floater_body','floaterLoading=0');
}

function getStitches(sat,date,time,type) {
  var vars=new Array();
  vars.push('float=stitches');
  vars.push('offsettz='+offsetTZ);
  vars.push('sat='+sat);
  vars.push('date='+date);
  vars.push('time='+time);
  vars.push('type='+type);
  runAJAX('results_float.php',vars,'write','floater_body','floaterLoading=0');
}

// Validation
function validateDate(id) {
  var vars=new Array();
  var value=document.getElementById(id).value;
  vars.push('type=date');
  vars.push('id='+id);
  vars.push('value='+value);
  runAJAX('jsupdate.php',vars,'eval');
}
function validateTime(id) {
  var vars=new Array();
  var value=document.getElementById(id).value;
  vars.push('type=time');
  vars.push('id='+id);
  vars.push('value='+value);
  runAJAX('jsupdate.php',vars,'eval');
}
function validateLatLon() {
  var vars=new Array();
  var value=document.getElementById('TXT_lat').value;
  var value2=document.getElementById('TXT_lon').value;
  vars.push('type=latlon');
  vars.push('id=TXT_lat');
  vars.push('value='+value);
  vars.push('id2=TXT_lon');
  vars.push('value2='+value2);
  runAJAX('jsupdate.php',vars,'eval');
}

// Update location/satellite selections
function getDates(id,id2) {
  var vars=new Array();
  var value=document.getElementById(id).value;
  vars.push('type=date');
  vars.push('id='+id);
  vars.push('value='+value);
  if (getCookie('showsats')==3) { vars.push('sats=other'); }
  else if (getCookie('showsats')==2) { vars.push('sats=goes'); }
  else { }
  if (id2!=null) {
    vars.push('id2='+id2);
    var value2=document.getElementById(id2).value;
    vars.push('value2='+value2);
  }
  runAJAX('jsupdate.php',vars,'eval','','updateSatellite()');
}

function getSatellites(datelist) {
  var vars=new Array();
  vars.push('type=satellite');
  vars.push('dates='+datelist);
  if (getCookie('showsats')==3) { vars.push('sats=other'); }
  else if (getCookie('showsats')==2) { vars.push('sats=goes'); }
  else { }
  runAJAX('jsupdate.php',vars,'eval','','updateType()');
//  runAJAX('jsupdate.php',vars,'eval','','updatedSatellite()');
}
function getTypes(datelist,satlist) {
  var vars=new Array();
  vars.push('type=type');
  vars.push('dates='+datelist);
  vars.push('satkeys='+satlist);
  // Used to hide Block 11
  vars.push('admin='+isAdmin());
  runAJAX('jsupdate.php',vars,'eval','','updateCoverage()');
}
function getCoverages(datelist,satlist,typelist) {
  var vars=new Array();
  vars.push('type=coverage');
  vars.push('dates='+datelist);
  vars.push('satkeys='+satlist);
  vars.push('typekeys='+typelist);
  runAJAX('jsupdate.php',vars,'eval','','updateSchedule()');
}
function getSchedules(datelist,satlist,typelist,coverlist) {
  var vars=new Array();
  vars.push('type=schedule');
  vars.push('dates='+datelist);
  vars.push('satkeys='+satlist);
  vars.push('typekeys='+typelist);
  vars.push('coverkeys='+coverlist);
  runAJAX('jsupdate.php',vars,'eval','','updateSearchButton()');
}

// Draw coverage on map
function getSubpoint(datelist,satlist) {
  if (satlist.match(',') || satlist=='') {
    removeCoverage();
    return(false);
  }
  var vars=new Array();
  vars.push('type=subpoint');
  vars.push('dates='+datelist);
  vars.push('satkeys='+satlist);
  runAJAX('jsupdate.php',vars,'eval');
}

// Create PHP call to handle save/delete
function sendAdmin(rowInfo,action) {
  var vars=new Array();
  vars.push('action='+action);
  vars.push('offsettz='+offsetTZ);
  vars.push('satellite='+rowInfo['satellite']);
  vars.push('date='+rowInfo['date']);
  vars.push('time='+rowInfo['time']);
  vars.push('type='+rowInfo['type']);
  vars.push('coverage='+rowInfo['coverage']['old']+
            ','+rowInfo['coverage']['new']);
  vars.push('schedule='+rowInfo['schedule']['old']+
            ','+rowInfo['schedule']['new']);
  vars.push('satidx='+rowInfo['satidx']);
  vars.push('dateidx='+rowInfo['dateidx']);
  vars.push('timeidx='+rowInfo['timeidx']);
  vars.push('typeidx='+rowInfo['typeidx']);

  // Push comments
  var string='|';
  if (rowInfo['linked'].length>0) string='';
  for (var i=0; i<rowInfo['comments'].length; i++) {
    if (i>0) string+='|';
    string+=escape(rowInfo['comments'][i]);
  }
  vars.push('commentsMINE='+string);

  // Push keyed comments
  var string='';
  for (var i=0; i<rowInfo['kcomments'].length; i++) {
    if (i>0) string+='|';
    string+=rowInfo['kcomments'][i]['old']+',';
    string+=rowInfo['kcomments'][i]['new']+',';
    string+=rowInfo['kcomments'][i]['add'];
  }
  vars.push('kcomments='+string);

  // Push linked times
  var string='';
  for (var i=0; i<rowInfo['linked'].length; i++) {
    if (i>0) string+='|';
    string+=rowInfo['linked'][i]['time']+',';
    string+=rowInfo['linked'][i]['type'];
  }
  vars.push('linked='+string);

//  printRowInfo(rowInfo);
  if (document.location.href.match('test')) vars.push('test=1');

  runAJAX('admin.php',vars,'eval');
}

// Create PHP call to handle save/delete
function sendAdminDayComment(rowInfo,action) {
  var vars=new Array();
  vars.push('action='+action);
  vars.push('satellite='+rowInfo['satellite']);
  vars.push('satidx='+rowInfo['satidx']);
  vars.push('dateidx='+rowInfo['dateidx']);
  vars.push('cmtidx='+rowInfo['cmtidx']);

  if (document.location.href.match('test')) vars.push('test=1');

  vars.push('starttime='+rowInfo['start']['old']+
            ','+rowInfo['start']['new']);
  vars.push('endtime='+rowInfo['end']['old']+
            ','+rowInfo['end']['new']);
  vars.push('daycomment='+escape(rowInfo['daycomment']['old'])+
            '|'+escape(rowInfo['daycomment']['new']));

  runAJAX('admin.php',vars,'eval');
}

// Load the various admin menus into the correct DIV
function getAdminOption(which,vars) {
  if (vars==null) vars=new Array();
  runAJAX('admin_'+which+'.php',vars,'write','menu_admin_full');
}