// constants
EXACTLY = 1 ;
ABOUT = 2 ; 
BEFORE = 3 ; 
AFTER = 4 ; 
BETWEEN = 5 ;   
//IN =  ; 
PRESENT = 8 ;
DONT_KNOW = 9 ;


/*
these js arrays are populated from php 
*/
var showDay = new Array(1, 16, 0 );
var showMonth = new Array(1, 2, 16, 0 );
var showYear = new Array(1, 12, 2, 3, 4, 5, 14, 16, 13, 0 );
var showBetweenYear = new Array(5, 0 );
var showCentury = new Array(15, 0 );  //added by paul.) 07/01/2011
var hideToDate = new Array(16, 0 );

var globalHiddenToDate=false;
 
/* 
facade that makes the show/hiding simpler to understand
arrays (from php) contain the rules to use

lm (1 apr 2010)
*/

function change_date_option(field_name, drop) {
  
  //debugger;
  var option_id = drop.options[drop.selectedIndex].value;    
    
  changeDMYOfDateField(option_id, field_name);
  
  
  //hide the TO date if required (to date must be enclosed in div id of 'property-connection-to-row')  
  hideToDateFlag = determineDisplayFromRulesArray(option_id, hideToDate);
  showOrHideToDate(hideToDateFlag, field_name, option_id);
  
  //when the end date is set to present show private-address-row, in other cases, hide it
  if(field_name == 'end' && option_id == 8) {
  
    //show the private address row
    if(document.getElementById("private-address-row") != null)
  		document.getElementById("private-address-row").style.display = '';
  	//alert("show private-address-row");
  	
  }	else {
  
  	//hide the private address row
  	if(document.getElementById("private-address-row") != null)
  		document.getElementById("private-address-row").style.display = 'none';
  	//alert("hide private-address-row");
  	
  }

}


function changeDMYOfDateField(option_id, field_name)
{
  // check rules to see if day should be displayed for this option_id
  showDayFlag = determineDisplayFromRulesArray(option_id, showDay);    
  // show or hide the day based on the rule
  showOrHideDay(showDayFlag, field_name);
  
  // repeat the above procedure for month
  showMonthFlag = determineDisplayFromRulesArray(option_id, showMonth);
  showOrHideMonth(showMonthFlag, field_name);
  
  // repeat the above procedure for year
  showYearFlag = determineDisplayFromRulesArray(option_id, showYear);
  showOrHideYear(showYearFlag, field_name);
  
  // repeat the above procedure for century - added by paul.O 07/01/2011
  showCenturyFlag = determineDisplayFromRulesArray(option_id, showCentury); 
  showOrHideCentury(showCenturyFlag, field_name);
  
  // repeat the above procedure for between year
  showBetweenYearFlag = determineDisplayFromRulesArray(option_id, showBetweenYear);
  showOrHideBetweenYear(showBetweenYearFlag, field_name);

}

function determineDisplayFromRulesArray(option_id,arrayToSearch)
{
	var showFlag=false;
	
	for ( var i=0; i < arrayToSearch.length; ++i ){
	
	    if(arrayToSearch[i] == option_id)
	    {
	    	showFlag=true;     
	    }
  	}
  	
  	return showFlag;
}

function showOrHideDay(showDayFlag, field_name)
{		  		
	var idName = field_name + '-date-from-day';
	showOrHideBasedOnFlag(showDayFlag, idName);	 
}

function showOrHideMonth(showMonthFlag, field_name)
{	
	var idName = field_name + '-date-from-month';
	showOrHideBasedOnFlag(showMonthFlag, idName);	 
}

function showOrHideYear(showYearFlag, field_name)
{
	var idName = field_name + '-date-from-year';
	showOrHideBasedOnFlag(showYearFlag, idName);
}


function showOrHideCentury(showCenturyFlag, field_name) {  //added by paul.O 07/01/2011
	var idName = field_name + '-date-century';
	showOrHideBasedOnFlag(showCenturyFlag, idName);
}

function showOrHideBasedOnFlag(flag, htmlElementId)
{
	if(flag)
	{						
  		var ele = document.getElementById(htmlElementId);
  		if(ele!=null)
  			ele.style.display = '';  		  		  		  		  	
	}  		
  	else
  	{  					
  		var ele = document.getElementById(htmlElementId);
  		if(ele!=null)
  			ele.style.display = 'none';  		  		
  	}  
}

function showOrHideBetweenYear(showMonthFlag, field_name)
{
	if (showMonthFlag) {
		var ele = document.getElementById(field_name + '-date-to-year');
		if(ele!=null) 
			ele.style.display = 'inline'; //note this is inline
    } else {
    	var ele = document.getElementById(field_name + '-date-to-year');
    	if(ele!=null)
    		ele.style.display = 'none';  
    }
}

/*
* call this to hide the day month and year of a certain date field - lm 6 apr 2010
*/
function hideDMY(field_name_prefix)
{
	var show = false;  
	showOrHideDay(show, field_name_prefix);  
	showOrHideMonth(show, field_name_prefix);  
	showOrHideYear(show, field_name_prefix);  
	showOrHideBetweenYear(show, field_name_prefix);
	
	if(document.getElementById("built-date-from-option") != null)
		showOrHideCentury(show, field_name_prefix);  //added by paul.O 0/7/2011 - may need to remove!!
}

/*
* call this to show the day month and year of a certain date field - lm 6 apr 2010
*/
function showDMY(field_name_prefix)
{
	var show = true;  
	showOrHideDay(show, field_name_prefix);  
	showOrHideMonth(show, field_name_prefix);  
	showOrHideYear(show, field_name_prefix);  
	//showOrHideBetweenYear(show, field_name_prefix);
	
	if(document.getElementById("built-date-from-option") != null)
		showOrHideCentury(show, field_name_prefix);  //added by paul.O 0/7/2011 - may need to remove!!
}

// NB had to call this showYearField as when called it showYear it conflicted with the array name above
function showYearField(field_name_prefix)
{
	showOrHideYear(true, field_name_prefix);
}

/**
* resets values of the date field to be blank (note does not change the option eg Dont know etc ...
*/
function resetDateFieldValues(field_name_prefix)
{

	document.getElementById(field_name_prefix+'-date-from-year').value = '';
	document.getElementById(field_name_prefix+'-date-from-month').value = '';
	document.getElementById(field_name_prefix+'-date-from-day').value = '';
	document.getElementById(field_name_prefix+'-date-century').value = '';  //added by paul.O 07/01/2011 - may need removing!!
}

/*
* shows / hides to date as needed
* field_name is the prefix 
*/

function showOrHideToDate(hideToDate, field_name, option_id)
{ 
  if(field_name=='end') // we only hide the TO date when FROM option = IN , if==end the TO option is being passed
    return; 
  
  // check if this is part of the household flow (ie multilink_s_2 etc ... )
  householdId = isHouseholdFlow( field_name );
  if(field_name=='household_e' || field_name=='household_s')
    householdId = 'household_e'; // its on create_household_step1.php
  
  		
	// this will be hidden when TO should always be hidden eg if on link 
	// person to property and the option married here is selected - lm 26 aug2010
	if(globalHiddenToDate==true) 
	 hideToDate=true; 
	//alert('gloobal hide = ' + globalHiddenToDate); 
	//debugger;	
	if(householdId == 'household_e') // on create_household_step1.php 
	{
	   if (hideToDate) {
      var ele = document.getElementById('property-connection-to-row');
      if(ele!=null){      
        ele.style.display = 'none';       
        resetToDontKnow('household_e');                   
      } 
    } else {
      var ele = document.getElementById('property-connection-to-row');
      if(ele!=null)
        ele.style.display = '';  
    }		      
	}	
	else if(householdId)
	{
	   if(householdId==123456789)
	     return; // dont nowt its on the to part dont need to do anything only from part triggers code below
	    // navigate dom to get the next tr which is the to part of the from ,to date stuff 
      houseSelect = document.getElementById('multilink_s_'+householdId+'-date-from-option');      
      a = houseSelect.parentNode;      
      thetd = a.parentNode;      
      thetr = thetd.parentNode;      
      thetrto = thetr.nextSibling.nextSibling;       	
    if (hideToDate) {      
      var ele = thetrto;
      if(ele!=null){      
        ele.style.display = 'none';        
        resetToDontKnow('multilink_e_'+householdId);                   
      } 
    } else {
      var ele = thetrto;
      if(ele!=null)
        ele.style.display = '';  
    }

	}
	else
  { // normal date (not household ) 		
	
  	if (hideToDate) {
  		var ele = document.getElementById('property-connection-to-row');
  		if(ele!=null){ 			
  			ele.style.display = 'none';  			
  		  resetToDontKnow('end');  									
  	  } 
    } else {
    	var ele = document.getElementById('property-connection-to-row');
    	if(ele!=null)
    		ele.style.display = '';  
    }
  
  }   
    
    
}

/*
resets option and values of date field
*/
function resetToDontKnow(prefix)
{
	var dontKnow = 9;
	resetDateFieldValues(prefix);  
	
	changeDMYOfDateField(dontKnow, prefix);
	
	endSelect = document.getElementById(prefix+'-date-from-option');			
	endSelect.value = dontKnow;			
			
}

//-----------------------------------------------------------------------
// below here added 10 feb - louis for household stuff 


// an option is based in eg about , exactly etc ..
// based on this show / hide relevant parts of the date component
function showRelevantFields(selected_option, date_prefix, startDateBoolean, readFrom)
{
  //-date-from-option
  
  //alert('hits here option = '+selected_option + ' pref = '+date_prefix ) ;
  
  optionValue = selected_option.options[selected_option.selectedIndex].value;
    
  if(optionValue != DONT_KNOW) // 9 = DONT KNOW 
  {    
    changeDMYOfDateField(optionValue, date_prefix)   
    // change actual option also
    document.getElementById(''+date_prefix+'-date-from-option').selectedIndex = selected_option.selectedIndex;
    
    // set values from lead
    //debugger;
    if(startDateBoolean)
    {      
      sprefix = 'start';
      if(readFrom != '')
        sprefix = 'household_s';
      startDay = document.getElementById(''+sprefix+'-date-from-day').value;
      document.getElementById(''+date_prefix+'-date-from-day').value = startDay;
      startMonth = document.getElementById(''+sprefix+'-date-from-month').value;  
      document.getElementById(''+date_prefix+'-date-from-month').value = startMonth;
      
      startYear = document.getElementById(''+sprefix+'-date-from-year').value;
      
      startYearStr = ''+date_prefix+'-date-from-year'; 
      document.getElementById(startYearStr).value = startYear;
    }
    else
    {
      //
      eprefix = 'end';
      if(readFrom != '')
        eprefix = 'household_e';
      document.getElementById(''+date_prefix+'-date-from-day').value = document.getElementById(''+eprefix+'-date-from-day').value; 
      document.getElementById(''+date_prefix+'-date-from-month').value = document.getElementById(''+eprefix+'-date-from-month').value;
      document.getElementById(''+date_prefix+'-date-from-year').value = document.getElementById(''+eprefix+'-date-from-year').value;
    }

    
          
  }
  else
  {
    //alert('its DONT KNOW ,  = '+optionValue);
  }
  
  
  
  
  
  
  
  
}

// checks that multi link dates are ok, ie there is date/s in common with household dates
//used in household stuff - lm 3 feb 2011  
function validateHouseholdDatesOk()
{   
  //debugger;
    houseHoldStartDate = makeDateFrom('household_s','');
    //alert('start='+houseHoldStartDate);
    houseHoldEndDate = makeDateFrom('household_e','');
    //alert('end='+houseHoldEndDate);
    errorMsg='';
        
    //alert('arr count = '+additionalPersons.length);    
        
    for (i=0;i<additionalPersons.length;i++)
    {
    
      sprefix = 'multilink_s_';
      eprefix = 'multilink_e_';
      
      ele = sprefix+''+additionalPersons[i];
      
      d = document.getElementById(ele+'-date-from-day').value;
      m = document.getElementById(ele+'-date-from-month').value;
      y = document.getElementById(ele+'-date-from-year').value;
      if(trim(d)=='' && trim(m)=='' && trim(y)==''  )
      {
        errorMsg+=' missing start date ';
        continue;
      }
      
      ele = eprefix+''+additionalPersons[i];
      d = document.getElementById(ele+'-date-from-day').value;
      m = document.getElementById(ele+'-date-from-month').value;
      y = document.getElementById(ele+'-date-from-year').value;
      if(trim(d)=='' && trim(m)=='' && trim(y)==''  )
      {
        errorMsg+=' missing end date ';
        continue;
      }
      
      // get date bits and assemble into a js date objects      
      
      sdate = makeDateFrom(sprefix, additionalPersons[i]);
      
      edate = makeDateFrom(eprefix, additionalPersons[i]);
      if(sdate > houseHoldEndDate) // bad
        errorMsg += '\n'+sdate.toDateString()+' start date after household end date '+houseHoldEndDate.toDateString();
      if(sdate < houseHoldStartDate) // bad
        errorMsg += '\n'+sdate.toDateString()+' start date before household start date '+houseHoldStartDate.toDateString();        
      if(edate > houseHoldEndDate) // bad
        errorMsg += '\n'+edate.toDateString()+' end date after household end date '+houseHoldEndDate.toDateString();
    }

    return errorMsg;
}

// used in household stuff - lm 3 feb 2011
function makeDateFrom(prefix, idPerson)
{
  //alert('test '+prefix+ 'person = '+idPerson);
  prefix = prefix+''+idPerson;
  day = document.getElementById(prefix+'-date-from-day').value
  if(trim(day)=='')
   day=1;  
  month = document.getElementById(prefix+'-date-from-month').value
  if(trim(month)=='')
  {
       month=0;
  }
  else
  {
    month = month-1;
  }  

  year = document.getElementById(prefix+'-date-from-year').value

  linkDate = new Date(year, month, day);

  return linkDate;
    
}

// checks if we are looking at dates on the household flow (eg create_household_step4.php ) 
function isHouseholdFlow( prefix )
{
  //debugger;
  //alert(prefix);
  var pattern = /multilink_._(\d)+/;
  
  res = pattern.test(prefix);
  //alert('res = '+res);
  
  if(!res)
  {
    return false; // its not a match , were not on household stuff
  }

  var pattern = /multilink_e_(\d)+/;
  
  res = pattern.test(prefix);
  
  
  if(res)
  {
    return 123456789; // its on the to of household date already , so do nothing
    // pass back this to calling function to let it know what todo  
  }    
     
  pattern = /(\d)+/; // get the if part of the hosehouse multilink date 
  arrayOfMatches = pattern.exec(prefix);
  
  if(arrayOfMatches.length>0){
    
    //for(i = 0; i < arrayOfMatches.length; i++) {
    //  alert('match = '+arrayOfMatches[i]);
    //}
    //alert('prefix to return = '+ arrayOfMatches[0]);
    return arrayOfMatches[0] ; // only want the first match , as they will be the most acurate match
  }
  
  return false; // if it gets here its not part of household flow (SHOULD NEVER GET TO THIS LINE )  
  
  
}