<h3 align='left'>Yearly Medications</h3>

<?php

$tbl 		= 'medicines';
$fyear 		= $_POST["fyear"];

if (!$fyear) $fyear = date('Y');

echo "Select year <select name='fyear' onchange=\"javascript: document.location.href='?pg=$pg&fyear='+this.value\">
<option value=''></option>";

$rs = mysql_query("select year(dis_datetime) as fyear from medications group by fyear desc");
while ($o = mysql_fetch_object($rs)) {
	$fyear1 = $o->fyear; 
	echo "<option value='$fyear1'";
	if ($fyear1 == $fyear) echo " selected";
	echo ">$fyear1</option>";
}
echo "</select>
<center>";

$no = 12;//cal_days_in_month(CAL_GREGORIAN, $m, $y);
echo "<table border='1' width='90%'>
<tr><th rowspan='2'>Sr</th><th rowspan='2'>Months =><br>Medicines v</th>
<th rowspan='2'>Open<br>Stock</th><th rowspan='2'>Receipt<br>Qty</th>
<th colspan='12'>Medicines used each month this year ($fyear)</th><th rowspan='2'>Used<br>Qty</th>
<th rowspan='2'>Expired<br>Qty</th><th rowspan='2'>Close<br>Stock</th></tr>
<tr>";
foreach ($months as $mth) {
	echo "<th>$mth</th>";
}
echo "</tr>";
$sl = 0;
$rs = mysql_query("select med_id,med_name,opening_stock,qty_expired from $tbl order by med_name");
while ($o = mysql_fetch_object($rs)) {
	$sl++;
	$mid = $o->med_id;
	$ostock0 = $o->opening_stock;
	$xqty = $o->qty_expired;
	echo "<tr><td align='center'>$sl</td><td>$o->med_name</td>";

	// total receipt qty in previous years (INFLOW)
	$rqty1 = 0;
    $sr = mysql_query("select sum(qty_receipt) as rq from receipts where med_id=$mid and year(rec_date)<$fyear group by med_id");
  	$q = mysql_fetch_object($sr);
	if ($q->rq) $rqty1 = $q->rq;

	// total receipt qty in this year (INFLOW)
	$rqty2 = 0;
    $sr = mysql_query("select sum(qty_receipt) as rq from receipts where med_id=$mid and year(rec_date)=$fyear group by med_id");
  	$q = mysql_fetch_object($sr);
	if ($q->rq) $rqty2 = $q->rq;    	

	// total medication qty in previous years (OUTFLOW)
    $uqty1 = 0;
    $sr = mysql_query("select sum(qty) as uq from medications where med_id=$mid and year(dis_datetime)<$fyear group by med_id");
    $q = mysql_fetch_object($sr);
    if ($q->uq) $uqty1 = $q->uq;

	// opening stock = (opening stock + total receipt - total used) before this year
	$ostock = ($ostock0 + $rqty1) - $uqty1;
    echo "<td align='center'>". ($ostock < 0 ? "<font color='red'>$ostock</font>" : $ostock). "</td><td align='center'>$rqty2</td>";

	// total medication qty in this year (OUTFLOW)
	$tot = 0;
	for ($i=1; $i <= $no; $i++) {
		$m = $i; //str_pad($i, 2, '0', STR_PAD_LEFT);
		$sr = mysql_query("select sum(qty) as uq from medications where med_id=$mid and concat(year(dis_datetime),'-',month(dis_datetime))='$fyear-$m' group by med_id");
		$q = mysql_fetch_object($sr);
		$uqty2 = '';
		if ($q->uq) {
			$uqty2 = $q->uq;
			$tot += $uqty2;
		}
		echo "<td align='center'>$uqty2</td>";
	}
	// total qty used this year
	echo "<td align='center'>$tot</td><td align='center'>$xqty</td>";

	//closing stock = (opening stock - total received - total used) this year
	$cstock = ($ostock0 + $rqty1 + $rqty2) - ($uqty1 + $tot + $xqty);
	echo "<td align='center'>". ($cstock < 0 ? "<font color='red'>$cstock</font>" : $cstock). "</td></tr>";
}
	
?>
</table>
</center>