<?php
require_once 'pdf_primary.php';    // contains getPrimaryDetailsHtml()
require_once 'pdf_tech.php';       // contains getTechSummaryHtml()
require_once dirname(__DIR__) . "/vendor/autoload.php";

function genTechApplicationHtml($user_id, $post_id, $application_id, $registration_id, $ad_id)
{
    global $conn;

    // 1. Fetch Advertisement details
    $advt_no = '<em>-</em>';
    if ($ad_id) {
        $stmt = $conn->prepare("SELECT Ad_id FROM Advertisement WHERE id = ? LIMIT 1");
        if ($stmt) {
            $stmt->bind_param("i", $ad_id);
            $stmt->execute();
            $ad_result = $stmt->get_result()->fetch_assoc();
            $stmt->close();
            $advt_no = $ad_result['Ad_id'] ?? '<em>-</em>';
        }
    }

    // 2. Fetch Post details
    $post_code = $post_name = $category = '<em>-</em>';
    if ($post_id) {
        $stmt = $conn->prepare("SELECT post_code, post_title, category FROM posts WHERE id = ? LIMIT 1");
        if ($stmt) {
            $stmt->bind_param("i", $post_id);
            $stmt->execute();
            $post_result = $stmt->get_result()->fetch_assoc();
            $stmt->close();
            $post_code = $post_result['post_code'] ?? '<em>-</em>';
            $post_name = $post_result['post_title'] ?? '<em>-</em>';
            $category = $post_result['category'] ?? '<em>-</em>';
        }
    }

    // Hardcoded Lab Name
    $lab_name = "CSIR-CSMCRI";

    // Build the HTML
    $data = '
    <style>
        .pdf-header { text-align: center; margin-bottom: 14px; }
        .pdf-header h2 { margin-bottom: 7px; font-size: 26px; font-family: "Times New Roman", serif; font-weight: bold; }
        .pdf-header .reg-id { font-weight: bold; font-size: 14px; font-family: Arial, sans-serif; }
        .pdf-meta { text-align: center; margin-bottom: 8px; font-size: 15px; font-family: Arial, sans-serif; }
        .pdf-meta strong,
        .pdf-meta b { font-weight: bold; }
        .pdf-post { text-align: center; margin-bottom: 20px; font-size: 15px; font-family: Arial, sans-serif; }
        .pdf-post b { font-weight: bold; }
        .section-divider {
            border: none;
            border-top: 1px solid #ddd;
            margin: 32px auto 22px auto;
            width: 820px;
            max-width: 100%;
        }
    </style>
    <div class="pdf-header">
        <h2>Central Salt and Marine Chemicals Research Institute</h2>
        <div class="reg-id">Registration ID: <b>' . htmlspecialchars($registration_id) . '</b></div>
    </div>
    <div class="pdf-meta">
        Advt No: <strong>' . $advt_no . '</strong> &nbsp;&nbsp;
        Lab Name: <strong>' . htmlspecialchars($lab_name) . '</strong> &nbsp;&nbsp;
        Post Code: <b>' . $post_code . '</b>
    </div>
    <div class="pdf-post">
        Name of Position: <b>' . $post_name . ' (' . $category . ')</b>
    </div>
    <hr class="section-divider" />
    ';

    // Setup mPDF
    $mpdf = new \Mpdf\Mpdf([
        "tempDir" => dirname(__DIR__) . "/tmp",
    ]);

    // Prepare Output Path
    $outputDir = "sites/upload/tech_applications/" . $application_id . '/';
    if (!is_dir($outputDir)) {
        mkdir($outputDir, 0777, true);
    }
    $outputFilename = "application_summary_" . $registration_id . ".pdf";
    $outputPath = $outputDir . $outputFilename;

    // Write HTML to mPDF
    $mpdf->WriteHTML($data);
    $mpdf->WriteHTML(getPrimaryDetailsHtml($user_id));
    $mpdf->WriteHTML(getTechSummaryHtml($application_id));

    // Output PDF to file
    $mpdf->Output($outputPath, "F");
    return $outputPath;
}

// USAGE EXAMPLE:
// $pdfPath = genTechApplicationHtml(14, 8, 6, "Aoudbec", 5);
// echo "PDF saved to: $pdfPath";



// $html = genTechApplicationHtml(14, 8, 6, "Aoudbec", 5);
// echo $html;