<?php
include("common_db.php");
include("functions.php");
dbconnect($host, $username, $password);

$strings = loadStrings($lang, 'VRPDF');

include("pdf/phppdflib.class.php");

//if(isset($_REQUEST['paper_size'])) {			//disabled
//	$papersize = $_REQUEST['paper_size'];
//} else {
	$papersize = 'a4';		//default to a4
//}

$paperheight = 841;			//210 mm (A4) == 595.275 points
$paperwidth = 595;			//297 mm (A4) == 841.889 points
$sidemargin = 70;			//margin to the left and right
$upmargin = 70;				//margin to the top and bottom
$tablemargin = 3;			//margin between table columns

if(isset($_REQUEST['report_id'])) {
	$report_id = intval($_REQUEST['report_id']);
} else {
	//todo: panic
	die('panic');
}

//Get the report from the database
mysql_select_db('HypatiaDB');
$report_details = mysql_fetch_array(mysql_query("SELECT * FROM reports WHERE id = '$report_id'"));

$pdf = new pdffile();

$pdf->set_default('margin', 0);

$page = $pdf->new_page($papersize);
$pagearray[] = $page;

//draw_text takes, unfortunately enough, args as (left, bottom, text, page, params)
$pdf->draw_text($sidemargin, $paperheight - ($upmargin), $report_details['title'], $page, array('height' => 24, 'margin' => 0, 'font' => 'Times-Roman'));
//$pdf->draw_text(0, 0, $report_details['title'], $page);

if($pdf->pop_error($num, $msg)) {
	error_log("pdf:$num:$mdg");
}

//now we need to draw the table
$sql = buildReportSQL($report_id);
mysql_select_db($report_details['db']);
$results = mysql_query($sql);

//There's no way to actually tell how wide a table column should be
//So, we loop through the result array and find the longest column, 
//and then set the length to that.

for($i = 0; $i < mysql_num_fields($results); $i++) {
	$len = $pdf->strlen(mysql_field_name($results, $i));
	$row_lengths[$i] = $len;
}

while($row = mysql_fetch_row($results)) {
	$rows[] = $row;
	for($i = 0; $i < count($row); $i++) {
		$len = $pdf->strlen($row[$i]);
		if($len > $row_lengths[$i]) {
			$row_lengths[$i] = $len;
		}
	}
}

//Now we move on to drawing
//The current y-position of the table draw is stored in the variable
//$position. This variable is passed to the appropriate functions,
//which return the new value for $position (based on how much y-space
//the row/header takes up)

//Like draw_text, position is the distance from the bottom of the page.

$position = $paperheight - ($upmargin + 24 + 5);		//24 - header, 5 - margin

$position = drawTableHeader($page, $results, $row_lengths, $position);

$banded = false;

$pages = 1;

for($o = 0; $o < count($rows); $o++) {
	$position = drawTableRow($page, $rows[$o], $row_lengths, $position, $banded);
	$banded = !$banded;
	//check if we need a new page
	if($position < $upmargin) {
		$page = $pdf->new_page($papersize);
		$position = $paperheight - $upmargin;
		$pages++;
		$pagearray[] = $page;
	}
}

function drawTableHeader($page, $results, $lengths, $position) {
	global $pdf, $sidemargin, $tablemargin;
	$margin = $sidemargin;
	$position -= 12;		//row height
	for($i = 0; $i < mysql_num_fields($results); $i++) {
		$pdf->draw_text($margin, $position, mysql_field_name($results, $i), $page);
		$margin += $lengths[$i] + $tablemargin;
	}
	$position -= 1;			//space for descenders
	//draw a line
	$x = array($sidemargin, $margin);
	$y = array($position, $position);
	$pdf->draw_line($x, $y, $page);
	return $position - 2;		//row height is 12 + 3 margin (the 12 + 1 is subtracted above)
}

function drawTableRow($page, $row, $lengths, $position, $banded) {
	global $pdf, $sidemargin, $tablemargin;
	$margin = $sidemargin;

	$total_margin = $margin;
	foreach($lengths as $l)
		$total_margin += ($l + $tablemargin);

	if($banded) {
		//top, left, bottom, right, page, params
		if(!$pdf->draw_line(array($margin, $total_margin), array($position - 7.5, $position - 7.5), $page, array('width' => 13, 'strokecolor' => array('red' => 0.9, 'green' => 0.9, 'blue' => 0.93)/*, 'fillcolor' => array('red' => 1, 'green' => 0, 'blue' => 0)*/))) {
			$pdf->pop_error($num, $msg);
			error_log("pdf:$num:$msg");
		}
	}

	for($i = 0; $i < count($row); $i++) {
		$pdf->draw_text($margin, $position - 12, $row[$i], $page);
		$margin += $lengths[$i] + $tablemargin;
	}
	return $position - 13;		//row height is 12 + 1 spacing
}

function drawFooter($page, $total, $current) {
	global $pdf, $report_details, $paperwidth, $strings;
	$str = sprintf($strings['VRP_FOOTER'], $report_details['title'], $current, $total);
	$len = $pdf->strlen($str);
	$left = ($paperwidth / 2) - ($len / 2);
	$pdf->draw_text($left, 5, $str, $page, array('height' => 10));
}

//Now, we draw the footer and so forth
$cpage = 1;
foreach($pagearray as $page) {
	drawFooter($page, $pages, $cpage);
	$cpage++;
}

$output = $pdf->generate();
header("Content-Type: application/pdf");
header("Content-Length: " . strlen($output));

echo $output;


?>