<?php  
ob_start();
require_once('tcpdf/tcpdf.php');
require_once('db_connection.php');

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['student_id'])) {
    $student_id = $_POST['student_id'];
    $term       = $_POST['report_term'] ?? 'N/A';
    $year       = $_POST['report_year'] ?? 'N/A';

    // ✅ Fetch single student results with total students for position
$stmt = $pdo->prepare("
    SELECT r.*, 
           (SELECT COUNT(*) FROM RANKED_RESULTS r2 
            WHERE r2.CLASS = r.CLASS AND r2.TERM = r.TERM AND r2.YEAR = r.YEAR) AS TOTAL_STUDENTS
    FROM RANKED_RESULTS r
    WHERE r.STUDENT_ID = ? AND r.TERM = ? AND r.YEAR = ?
");
$stmt->execute([$student_id, $term, $year]);
$student = $stmt->fetch(PDO::FETCH_ASSOC);

if (!$student) {
    ob_end_clean();
    die('No Report found for this student.');
}


    $pdf = new TCPDF('P', PDF_UNIT, PDF_PAGE_FORMAT, true, 'UTF-8', false);
    $pdf->SetCreator('Luzira COU Primary School');
    $pdf->SetAuthor('Luzira COU Primary School');
    $pdf->SetTitle("Student Report - " . $student['STUDENT_NAME']);
    $pdf->setPrintHeader(false);
    $pdf->setPrintFooter(false);
    $pdf->SetMargins(5, 4, 5);
    $pdf->SetAutoPageBreak(TRUE, 10);
    $pdf->SetFont('helvetica', '', 10);

    // ✅ Subject names
    $subjectNames = [
        'MTC'  => 'Mathematics',
        'ENG'  => 'English',
        'LIT1' => 'Literacy 1',
        'LIT2' => 'Literacy 2',
        'RE'   => 'Religious Education',
        'SST'  => 'Social Studies',
        'SCI'  => 'Science'
    ];

    // ✅ Comments mapping
    $commentsMap = [
        'MTC' => [[0,39,'Improve'], [40,54,'Tried'], [55,69,'Fair'], [70,89,'Very Good'], [90,100,'Excellent']],
        'ENG' => [[0,39,'Improve'], [40,54,'Tried'], [55,69,'Fair'], [70,89,'Very Good'], [90,100,'Excellent']],
        'SST' => [[0,39,'Improve'], [40,54,'Tried'], [55,69,'Fair'], [70,89,'Very Good'], [90,100,'Excellent']],
        'SCI' => [[0,39,'Improve'], [40,54,'Tried'], [55,69,'Fair'], [70,89,'Very Good'], [90,100,'Excellent']]
    ];

    // ✅ Teacher initials
    $initials = [
        'P1' => ['MTC'=>'KA','ENG'=>'MA','SST'=>'JJ','SCI'=>'LL'],
        'P2' => ['MTC'=>'KK','ENG'=>'HH','SST'=>'QQ','SCI'=>'DD'],
        'P3' => ['MTC'=>'MN','ENG'=>'PA','SST'=>'RR','SCI'=>'EE'],
        'P4' => ['MTC'=>'KS','ENG'=>'S','SST'=>'AS','SCI'=>'DM'],
        'P5' => ['MTC'=>'NR','ENG'=>'NR','SST'=>'AD','SCI'=>'RI'],
        'P6' => ['MTC'=>'AH','ENG'=>'AJ','SST'=>'BI','SCI'=>'NM'],
        'P7' => ['MTC'=>'OD','ENG'=>'SE','SST'=>'AP','SCI'=>'BY']
    ];

    // ✅ Comment generator
    function getComment($subject, $mark, $commentsMap) {
        if (!isset($commentsMap[$subject])) return '';
        foreach ($commentsMap[$subject] as $range) {
            if ($mark >= $range[0] && $mark <= $range[1]) return $range[2];
        }
        return '';
    }

    // Start Report
    $pdf->AddPage();
    $pdf->Rect(5, 5, $pdf->getPageWidth() - 10, $pdf->getPageHeight() - 10);

    // ✅ Header
    $pdf->Image('logo.png', 7, 5, 20);
    $pdf->SetFont('helvetica', 'B', 14);
    $pdf->Cell(0, 5, 'LUZIRA CHURCH OF UGANDA PRIMARY SCHOOL', 0, 1, 'C');
    $pdf->SetFont('helvetica', 'B', 7);
    $pdf->Cell(0, 5, "P.O.Box 20061, Kampala - Uganda Email: luziracouprim@ymail.com Website: https://luziracouprimaryschool.com", 0, 1, 'C');
    $pdf->SetFont('helvetica', 'B', 10);
    $pdf->Cell(0, 5, "STUDENT'S TERMLY PROGRESSIVE REPORT - $term $year", 0, 1, 'C');
    $pdf->Ln(8);

    // ✅ Student details
    $pdf->Ln(5); // moves down 5 units (you can adjust)
    $pdf->writeHTML("<div style='background-color:#dbe4f3; padding:5px; font-weight:bold; font-size:12pt; color:#003366;'>Pupil's Details</div>", true, false, false, false, '');
    $pdf->writeHTML("
    <div style='line-height:1.5; font-size:10pt; padding-left:5px; padding-top:4px;'>
    <strong>ID:</strong> {$student['STUDENT_ID']}<br>
    <strong>Name:</strong> {$student['STUDENT_NAME']}<br>
    <strong>Class:</strong> {$student['CLASS']}<br>
    <strong>Sex:</strong> {$student['SEX']}<br>
    <strong>Position:</strong> {$student['POSITION']} out of {$student['TOTAL_STUDENTS']}
    </div>", true, false, false, false, '');

    // ✅ Midterm Results
    $stmtMid = $pdo->prepare("SELECT * FROM midterm_results WHERE STUDENT_ID = ? AND CLASS = ? AND TERM = ? AND YEAR = ?");
    $stmtMid->execute([$student['STUDENT_ID'], $student['CLASS'], $term, $year]);
    $midterm = $stmtMid->fetch(PDO::FETCH_ASSOC);

    if ($midterm) {
       $pdf->Ln(5); // moves down 5 units (you can adjust)
        $pdf->writeHTML('<h3 style="color:#007BFF;">MIDTERM RESULTS</h3>', true, false, false, false, '');
        $midtermTable = '<table border="1" cellpadding="4"><thead><tr style="background-color:#eee;">
            <th>LEARNING AREA</th><th>MARKS OBTAINED</th><th>OUT OF</th><th>AGG</th><th>TEACHER\'S COMMENT</th><th>INITIAL</th>
        </tr></thead><tbody>';
        foreach ($commentsMap as $code => $ranges) {
            $mark = $midterm[$code] ?? 0;
            $agg  = $midterm[$code.'_AGG'] ?? '';
            $comment = getComment($code, $mark, $commentsMap);
            $initial = $initials[$student['CLASS']][$code] ?? '';
            $subjectName = $subjectNames[$code] ?? $code;
            $midtermTable .= "<tr>
                <td>$subjectName</td><td>$mark</td><td>100</td><td>$agg</td><td>$comment</td><td>$initial</td>
            </tr>";
        }
        $midtermTable .= "<tr style='background-color:#f0f0f0; font-weight:bold;'> 
            <td>TOTAL MARKS</td><td>{$midterm['TOTAL_MARKS']}</td>
            <td>TOTAL AGG</td><td>{$midterm['TOTAL_AGG']}</td>
            <td>DIVISION {$midterm['DIVISION']}</td><td></td>
        </tr></tbody></table>";
        $pdf->writeHTML($midtermTable, true, false, false, false, '');
    }

    // ✅ End of Term Results
    $pdf->writeHTML('<h3 style="color:#28A745;">END OF TERM RESULTS</h3>', true, false, false, false, '');
    $eotTable = '<table border="1" cellpadding="4"><thead><tr style="background-color:#eee;">
        <th>LEARNING AREA</th><th>MARKS OBTAINED</th><th>OUT OF</th><th>AGG</th><th>TEACHER\'S COMMENT</th><th>INITIAL</th>
    </tr></thead><tbody>';
    foreach ($commentsMap as $code => $ranges) {
        $mark = $student[$code] ?? 0;
        $agg  = $student[$code.'_AGG'] ?? '';
        $comment = getComment($code, $mark, $commentsMap);
        $initial = $initials[$student['CLASS']][$code] ?? '';
        $subjectName = $subjectNames[$code] ?? $code;
        $eotTable .= "<tr>
            <td>$subjectName</td><td>$mark</td><td>100</td><td>$agg</td><td>$comment</td><td>$initial</td>
        </tr>";
    }
    $eotTable .= "<tr style='font-weight:bold;'>
        <td>TOTAL MARKS</td><td>{$student['TOTAL_MARKS']}</td>
        <td>TOTAL AGG</td><td>{$student['TOTAL_AGG']}</td>
       <td>DIVISION {$student['DIVISION']}</td><td></td>
    </tr></tbody></table>";
    $pdf->writeHTML($eotTable, true, false, false, false, '');

    // ✅ Teacher remarks
    $pdf->Ln(5);
    $pdf->writeHTML("<strong>Class Teacher's Comment:</strong> " . ($student['REMARKS'] ?? ''), true, false, false, false, '');

     // ✅ Requirements
        $pdf->Ln(5);
        $pdf->SetFont('helvetica', 11);
        $pdf->writeHTML('<strong>Requirements</strong>', true, false, false, false, '');
        $requirementsTable = '<table border="1" cellpadding="2">
            <tr><th width="65%">Item</th><th width="35%">Status</th></tr>
            <tr><td>PARENTS CONTRIBUTION: P1-P2 Ugx75,000 P3-P5 Ugx85,000  and   P6-P7 UGX115,000</td><td>Should be Paid at Bank with Pay Code</td></tr>
            <tr><td>A REAM OF DOUBLE A/DOLOPHINE</td><td>Should be Provided by parent</td></tr>
            <tr><td>4 ROLLS OF TOILET PAPER</td><td>Should be Provided by parent</td></tr>
        </table>';
        $pdf->writeHTML($requirementsTable, true, false, false, false, '');

    // ✅ Headteacher comment
    $div = $student['DIVISION'];
    if ($div == '1') $ht_comment = 'Excellent performance. Keep it up.';
    elseif ($div == '2') $ht_comment = 'Good work. Aim higher.';
    elseif ($div == '3') $ht_comment = 'Fair performance. Needs improvement.';
    elseif ($div == '4' || $div == 'U') $ht_comment = 'Work harder next time.';
    else $ht_comment = 'Avoid missing exams.';
    $pdf->writeHTML('<strong>Headteacher\'s Comment:</strong> ' . $ht_comment, true, false, false, false, '');

    // ✅ Signature
    $yBefore = $pdf->GetY();
    $pdf->Image('signature.png', $pdf->GetX(), $yBefore, 20);
    $pdf->SetY($yBefore + 20);
    $pdf->Cell(20, 3, 'Headteacher', 0, 1, 'L');

    // ✅ Footer disclaimer
    $pdf->Ln(1);
    $pdf->SetFont('', 'BI');
    $pdf->SetTextColor(255, 255, 255);
    $pdf->SetFillColor(0, 0, 0);
    $pdf->Cell(0, 6, 'Disclaimer: These results can be verified via our website https://luziracouprimaryschool.com/', 0, 1, 'R', true);
    $pdf->SetTextColor(0, 0, 0);
    $pdf->SetFont('', '');

    ob_end_clean();
    $pdf->Output("Student_Report_{$student['STUDENT_NAME']}.pdf", 'I');
    exit;
}
?>
