<h3 align='left'>Stockbook</h3>
<center>
<table border='1' width='98%'>
<tr><th rowspan='2'>Sr.</th><th rowspan='2'>Medicine</th><th rowspan='2'>Date</th><th colspan='5'>Stock</th></tr>
<tr><th>Opening</th><th>Receipts</th><th>Total</th><th>Consumed</th><th>Closing</th></tr>

<?php

$tbl = 'medicines';
$summary = $_REQUEST["summary"];
if ($summary == 1) $dated = date('Y-m-d');

$rs = mysql_query("select med_id,med_name,opening_stock,date(date_creation) as dated from $tbl order by med_name");
while ($o = mysql_fetch_object($rs)) {
	$i++;
	if (!$summary) $dated = $o->dated;
	$opening_stock = $o->opening_stock;
	$qty_total = $opening_stock;
	$qty_balance = $opening_stock;
        
	echo "<tr>
	<th><a name='$i'></a>$i</th><th><a href='?pg=$pg&medid=$o->med_id#$i'>$o->med_name</a></th>
	<th>$dated</th><td align='right'>$opening_stock</td>";

	if ($summary) {
       	//receipt summary
       	$sr = mysql_query("select sum(qty_receipt) as qty_received from receipts where med_id=$o->med_id group by med_id");
       	if (mysql_num_rows($sr)) {
           	$q = mysql_fetch_object($sr);
           	$qty_total = $qty_total + $q->qty_received;
           	echo "<td align='right'>$q->qty_received</td><td align='right'>$qty_total</td>";
       	} else {
           	echo "<td></td><td align='right'>$qty_total</td>";
       	}

       	//consumption summary
       	$rr = mysql_query("select sum(qty) as qty_used from medications where med_id=$o->med_id group by med_id");
      	if (mysql_num_rows($rr)) {
           	$r = mysql_fetch_object($rr);
   	        $qty_balance = $qty_total - $r->qty_used;
            echo "<td align='right'>$r->qty_used</td><td align='right'>$qty_balance</td>";
       	} else {
            echo "<td></td><td align='right'>$qty_balance</td>";
       	}
        echo "</tr>";
	} else {
		//receipt on opening day
		$sr = mysql_query("select date(rec_date) as rec_date,sum(qty_receipt) as qty_received from receipts 
       	where med_id=$o->med_id and date(rec_date)=$o->dated group by med_id,date(rec_date)");
   		if (mysql_num_rows($sr)) {
            while ($q = mysql_fetch_object($sr)) {
				$qty_total = $qty_total + $q->qty_received;
				echo "<td align='right'>$q->qty_received</td><td align='right'>$qty_total</td>";
			}
       	} else {
			echo "<td></td><td align='right'>$qty_total</td>";
		} 
        
		//consumption on opening day
       	$rr = mysql_query("select date(dis_datetime) as dis_date,sum(qty) as qty_used from medications
       	where med_id=$o->med_id and date(dis_datetime)=$o->dated group by med_id,date(dis_datetime)");
       	if (mysql_num_rows($rr)) {
       		while ($r = mysql_fetch_object($rr)) {
           		$qty_balance = $qty_total - $r->qty_used;
				echo "<td align='right'>$r->qty_used</td><td align='right'>$qty_balance</td>";
			}
		} else {
			echo "<td></td><td align='right'>$qty_balance</td>";
		}
		echo "</tr>"; 

		$j = 0;
	
       	$sr = mysql_query("select rec_date,sum(qty_receipt) as qty_received
		from receipts where med_id=$o->med_id group by rec_date");
       	if (mysql_num_rows($sr)) {//procurement is done, check for consumption
           	while ($q = mysql_fetch_object($sr)) {
				$rr = mysql_query("select date(dis_datetime) as dis_date,sum(qty) as qty_used from medications
        		where med_id=$o->med_id and date(dis_datetime) >= $dated group by date(dis_datetime)");
        		if (mysql_num_rows($rr)) {//consumption is done, check dates
					while ($r = mysql_fetch_object($rr)) {
                		if (strtotime($r->dis_date) > strtotime($dated) && strtotime($r->dis_date) < strtotime($q->rec_date)) {
							//consumption is earlier to procurement
							$j++;

							echo "<tr><td>&nbsp;&nbsp;$i . $j</td><td></td><td>$r->dis_date [-]</td>
                        	<td align='right'>$qty_balance</td>";
				
                        	$qty_balance = $qty_total - $r->qty_used;
                        	
							echo "<td></td><td align='right'>$qty_total</td>
							<td align='right'>$r->qty_used</td><td align='right'>$qty_balance</td></tr>";
							
							$qty_total = $qty_balance;
							$dated = $r->dis_date;
						} else if (strtotime($q->rec_date) == strtotime($r->dis_date)) {
							//simultaneous procurement/consumption
							$j++;
                        	$qty_total = $qty_total + $q->qty_received;

							echo "<tr><td>&nbsp;&nbsp;$i . $j</td><td></td><td>$q->rec_date [+-]</td>
                        	<td align='right'>$qty_balance</td>";
				
							$qty_balance = $qty_total - $r->qty_used;
                        	
							echo "<td align='right'>$q->qty_received</td><td align='right'>$qty_total</td>
							<td align='right'>$r->qty_used</td><td align='right'>$qty_balance</td></tr>";
					
							$qty_total = $qty_balance;
							$dated = $r->dis_date;
						} else if (strtotime($q->rec_date) > strtotime($dated) && strtotime($q->rec_date) < strtotime($r->dis_date)) {
							//procurement is earlier to consumption
							$j++;
                        	$qty_total = $qty_total + $q->qty_received;

							echo "<tr><td>&nbsp;&nbsp;$i . $j</td><td></td><td>$q->rec_date [+]</td>
                        	<td align='right'>$qty_balance</td>";
				
							$qty_balance = $qty_total;
                        	
							echo "<td align='right'>$q->qty_received</td><td align='right'>$qty_total</td>
							<td align='right'></td><td align='right'>$qty_balance</td></tr>";
					
							$dated = $q->rec_date;
						} else {//consumption is after procurement
							//$dated = (strtotime($q->rec_date) > strtotime($r->dis_date) ? $q->rec_date : $r->dis_date);
							continue;
						}
						//$dated = (strtotime($q->rec_date) > strtotime($r->dis_date) ? $q->rec_date : $r->dis_date);
					}
				} else {//first procurement is earlier to first consumption
                    $j++;
					$qty_total = $qty_total + $q->qty_received;

					echo "<tr><td>&nbsp;&nbsp;$i . $j</td><td></td><td>$q->rec_date [+]</td>
					<td align='right'>$qty_balance</td>";

					$qty_balance = $qty_total;

                    echo "<td align='right'>$q->qty_received</td><td align='right'>$qty_total</td>
					<td></td><td align='right'>$qty_balance</td></tr>";
				}
				$dated = (strtotime($q->rec_date) > strtotime($r->dis_date) ? $q->rec_date : $r->dis_date);
			}
			//remaining consumption
            $rr = mysql_query("select date(dis_datetime) as dis_date,sum(qty) as qty_used from medications
            where med_id=$o->med_id group by date(dis_datetime)");
             if (mysql_num_rows($rr)) {
             	while ($r = mysql_fetch_object($rr)) {
               		if (strtotime($r->dis_date) > strtotime($dated)) {
						$j++;
 
	                    echo "<tr><td>&nbsp;&nbsp;$i . $j</td><td></td><td>$r->dis_date [-]</td>
                        <td align='right'>$qty_balance</td>";

                        $qty_balance = $qty_total - $r->qty_used;

                        echo "<td></td><td align='right'>$qty_total</td>
                        <td align='right'>$r->qty_used</td><td align='right'>$qty_balance</td></tr>";
                               		
						$qty_total = $qty_balance;
						$dated = $r->dis_date;
					}
				}
			}
		} else {//no procurement, only consumption
			$rr = mysql_query("select date(dis_datetime) as dis_date,sum(qty) as qty_used from medications
        		where med_id=$o->med_id and date(dis_datetime) > $dated group by date(dis_datetime)");
        		if (mysql_num_rows($rr)) {
				while ($r = mysql_fetch_object($rr)) {
					$j++;
                       
					echo "<tr><td>&nbsp;&nbsp;$i . $j</td><td></td><td>$r->dis_date [-]</td>
                    <td align='right'>$qty_balance</td>";

        			$qty_balance = $qty_total - $r->qty_used;

                    echo "<td></td><td align='right'>$qty_total</td>
					<td align='right'>$r->qty_used</td><td align='right'>$qty_balance</td></tr>";
					$qty_total = $qty_balance;
           		}       
			}
		}
	}
}
?>

</table>
</center>