<h3>Bill Payment</h3>
<center>

<?php
$tbl = 'el_billing';

$id = $_REQUEST['id'];
$mode = $_POST['mode'];
$month = previous_month();
$dated = date("Y-m-d");

if ($_POST["submit"] == 'SAVE') {
	if (mysql_num_rows(mysql_query("select * from $tbl where id=$id"))) {
		mysql_query("update $tbl set paid='Yes',mode='$mode' where id=$id");
	}
}

$sql = "select *,
    	least(
      	case when locate('0', flatno)>0 then locate('0', flatno) else length(flatno)+1 end,
      	case when locate('1', flatno)>0 then locate('1', flatno) else length(flatno)+1 end,
      	case when locate('2', flatno)>0 then locate('2', flatno) else length(flatno)+1 end,
      	case when locate('3', flatno)>0 then locate('3', flatno) else length(flatno)+1 end,
      	case when locate('4', flatno)>0 then locate('4', flatno) else length(flatno)+1 end,
      	case when locate('5', flatno)>0 then locate('5', flatno) else length(flatno)+1 end,
      	case when locate('6', flatno)>0 then locate('6', flatno) else length(flatno)+1 end,
      	case when locate('7', flatno)>0 then locate('7', flatno) else length(flatno)+1 end,
      	case when locate('8', flatno)>0 then locate('8', flatno) else length(flatno)+1 end,
      	case when locate('9', flatno)>0 then locate('9', flatno) else length(flatno)+1 end) pos
  	from $tbl where month='$month' and external='Yes' and paid='No' 
	order by left(flatno, pos-1), mid(flatno, pos, length(flatno)-pos+1)+0";

$rs = mysql_query("select * from el_config");
if (mysql_num_rows($rs)) {
	$o = mysql_fetch_object($rs);
	$unitrate = $o->unitrate;
	$subsidymode = $o->subsidymode;
	$receipt = $o->receipt;
	$receiptto = $o->receiptto;
	$summary = $o->summary;
	$summaryto = $o->summaryto;
	$bill = $o->bill;
	$billto = $o->billto;
}

$rs = mysql_query($sql);
while ($o = mysql_fetch_object($rs)) {
        $i++;
        $flatno = $o->flatno;
        $licensee = $o->licensee;
        $userfees = $o->userfees;
        $meterno = $o->meterno;
        $contactedload = $o->contactedload;
        $unitrate = $o->unitrate;
        $fixedrate = $o->fixedrate;
        $plrate = $o->plrate;
        $edrate = $o->edrate;
        $rscrate = $o->rscrate;
        $subsidy = $o->subsidy;
        $external = $o->external;

        $prevreading = $o->prevreading;
        $curreading = $o->curreading;
        $addunits = $o->addunits;
        $paid = $o->paid;
        $mode = $o->mode;

        //get licensee details
        $sr = mysql_query("select * from el_licensee where flatno='$flatno'");
        while ($q = mysql_fetch_object($sr)) {
                $fullname = $q->fullname;
                $designation = $q->designation;
                $email = $q->email;
                $category = $q->category;
                $external = $q->external;
                $sharing = $q->sharing;
        }
        
	$consumedunit = $curreading - $prevreading + $addunits;
        $consumedcharge = $consumedunit * $unitrate;

        if ($external == 'Yes') {
                $fixedcharge = $contactedload * $fixedrate;
                $subtotal = $consumedcharge + $fixedcharge;

                $plcharge = $contactedload * $plrate;
                $edcharge = $subtotal * $edrate/100;
                $rscharge = $subtotal * $rscrate/100;

                $totalamount = $subtotal + $plcharge + $edcharge + $rscharge;

                $payable = $totalamount;
        } else {
                $excessunit =  $consumedunit - $subsidy;
                if ($excessunit > 0) {
                        $excesscharge = $excessunit * $unitrate;
                } else {
                        $excessunit =  0;
                        $excesscharge = 0;
                }
        	$payable = $excesscharge;
	}
        //payable with userfees
	$payable += $userfees;
	//summarized figures
	$tunit += $consumedunit;
        $tcharge += $consumedcharge;
        $tamount += $totalamount;
        $tsubsidy += $subsidy;
        $tpayable += $payable;

        echo "<a name='$o->id'></a>
	<div align='right'>Ref.No.: IIIT-A/iLight-$o->id/$month<br>Date: ".date("d/m/Y")."</div>
        <div align='left'>[ $i ]<dir> 
                $fullname ($email)<br>
                $flatno, IIITA Campus, Devghat, Jhalwa<br>
                Allahabad-211012 (UP) INDIA
        </dir></div>

	<table width='100%' border='1' style='border-collapse: collapse'>
	<thead>
	<tr><th colspan='14'><h3>Electricity bill for the month of $month</h3> 
	(Unit rate: Rs. $unitrate/unit, Fixed rate: $fixedrate/KVA/month, 
	P.Load rate: $plrate/KVA/month, ED rate: $edrate%, Reg.Surcharge: $rscrate%)</th></tr>
	<tr><th rowspan='2'>MeterNo</th>
	<th rowspan='2'>Contacted<br>Load</th>
	<th colspan='2'>KWH Meter Reading</th>
	<th colspan='2'>Consumption</th>
	<th colspan='8'>Connection Charges</th></tr>
	<tr><th>Previous</th><th>Current</th><th>Units</th><th>Charge</th>
	<th>Fixed</th><th>SubTotal</th><th>PLC</th><th>ED</th><th>Sur</th>
	<th>Total</th><th>Rent</th><th>Payable</th></tr>
	</thead>
	<tfoot>
	<tr><th colspan='13' align='right'>Total Payable Amount</th>
	<th>Rs.".number_format($tpayable,2)."</th></tr>";
	if ($id == $o->id) {
		echo "<tr><td colspan='14'>Payment mode <input type='text' name='mode' value='$mode' size='80'></th></tr>
		<tr><th colspan='14'><input type='hidden' name='id' value='$o->id'>
		<input type='submit' name='submit' value='SAVE'></th></tr>";
	} else {
		echo "<tr><td align='right' colspan='14'>[ <a href='?pg=$pg&id=$o->id#$o->id'>Mark as Paid</a> ]</td></tr>";
	}
	echo "</tfoot>
	<tbody>
	<tr>
        <td align='center'>$meterno</td>
	<td align='center'>$contactedload</td>
	<td align='center'>$prevreading</td>
        <td align='center'>$curreading</td>
	<td align='center'>".number_format($consumedunit,2)."</td>
        <td  align='center'>Rs.".number_format($consumedcharge,2)."</td>
        <td align='center'>Rs.".number_format($fixedcharge,2)."</td>
        <td align='center'>Rs.".number_format(round($subtotal),2)."</td>
        <td align='center'>Rs.".number_format($plcharge,2)."</td>
        <td align='center'>Rs.".number_format($edcharge,2)."</td>
        <td align='center'>Rs.".number_format($rscharge,2)."</td>
        <td align='center'>Rs.".number_format($totalamount,2)."</td>
        <td  align='center'>Rs.".number_format($userfees,2)."</td>
        <td align='center'>Rs.".number_format($payable,2)."</td>
	</tr>
	</tbody>
	</table><br>";
	$tunit = 0; $tcharge = 0; $tamount = 0; $tsubsidy = 0; $tpayable = 0;
}        

?>