<?php
require_once 'config.php';
require_once 'functions.php';

if ($_SERVER['REQUEST_METHOD'] !== 'POST') {
    redirect('elsa.php');
}

// Collect general information
$name = post('name');
$lastname = post('lastname');
$title = post('title');
$mail = post('mail');
$subject = post('subject');
$classname = post('classname');
$usage_date_from = post('usage_date_from');
$usage_date_to = post('usage_date_to');
$availability_date = post('availability_date');
$message = post('message');

// Validate required fields
if (empty($name) || empty($lastname) || empty($mail) || empty($subject) || 
    empty($classname) || empty($usage_date_from) || empty($usage_date_to) || empty($availability_date)) {
    die('Fehler: Alle Pflichtfelder müssen ausgefüllt werden.');
}

// Validate email
if (!validateEmail($mail)) {
    die('Fehler: Ungültige E-Mail-Adresse.');
}

// Collect media data
$monografien = [];
$zeitschriftenartikel = [];
$herausgeberwerke = [];

// Process Monografie entries
if (isset($_POST['monografie_author']) && is_array($_POST['monografie_author'])) {
    $authors = postArray('monografie_author');
    $years = postArray('monografie_year');
    $editions = postArray('monografie_edition');
    $titles = postArray('monografie_title');
    $signatures = postArray('monografie_signature');
    $pagesFrom = postArray('monografie_pages_from');
    $pagesTo = postArray('monografie_pages_to');
    
    for ($i = 0; $i < count($authors); $i++) {
        $monografien[] = [
            'author' => $authors[$i] ?? '',
            'year' => $years[$i] ?? '',
            'edition' => $editions[$i] ?? '',
            'title' => $titles[$i] ?? '',
            'signature' => $signatures[$i] ?? '',
            'pages_from' => $pagesFrom[$i] ?? '',
            'pages_to' => $pagesTo[$i] ?? ''
        ];
    }
}

// Process Zeitschriftenartikel entries
if (isset($_POST['zeitschrift_author']) && is_array($_POST['zeitschrift_author'])) {
    $authors = postArray('zeitschrift_author');
    $years = postArray('zeitschrift_year');
    $volumes = postArray('zeitschrift_volume');
    $articleTitles = postArray('zeitschrift_article_title');
    $journalTitles = postArray('zeitschrift_journal_title');
    $signatures = postArray('zeitschrift_signature');
    $pagesFrom = postArray('zeitschrift_pages_from');
    $pagesTo = postArray('zeitschrift_pages_to');
    
    for ($i = 0; $i < count($authors); $i++) {
        $zeitschriftenartikel[] = [
            'author' => $authors[$i] ?? '',
            'year' => $years[$i] ?? '',
            'volume' => $volumes[$i] ?? '',
            'article_title' => $articleTitles[$i] ?? '',
            'journal_title' => $journalTitles[$i] ?? '',
            'signature' => $signatures[$i] ?? '',
            'pages_from' => $pagesFrom[$i] ?? '',
            'pages_to' => $pagesTo[$i] ?? ''
        ];
    }
}

// Process Herausgeberwerk entries
if (isset($_POST['herausgeber_publisher']) && is_array($_POST['herausgeber_publisher'])) {
    $publishers = postArray('herausgeber_publisher');
    $workTitles = postArray('herausgeber_work_title');
    $years = postArray('herausgeber_year');
    $editions = postArray('herausgeber_edition');
    $articleAuthors = postArray('herausgeber_article_author');
    $articleTitles = postArray('herausgeber_article_title');
    $signatures = postArray('herausgeber_signature');
    $pagesFrom = postArray('herausgeber_pages_from');
    $pagesTo = postArray('herausgeber_pages_to');
    
    for ($i = 0; $i < count($publishers); $i++) {
        $herausgeberwerke[] = [
            'publisher' => $publishers[$i] ?? '',
            'work_title' => $workTitles[$i] ?? '',
            'year' => $years[$i] ?? '',
            'edition' => $editions[$i] ?? '',
            'article_author' => $articleAuthors[$i] ?? '',
            'article_title' => $articleTitles[$i] ?? '',
            'signature' => $signatures[$i] ?? '',
            'pages_from' => $pagesFrom[$i] ?? '',
            'pages_to' => $pagesTo[$i] ?? ''
        ];
    }
}

// Prepare data for XML generation
$data = [
    'name' => $name,
    'lastname' => $lastname,
    'title' => $title,
    'mail' => $mail,
    'subject' => $subject,
    'classname' => $classname,
    'usage_date_from' => $usage_date_from,
    'usage_date_to' => $usage_date_to,
    'availability_date' => $availability_date,
    'message' => $message,
    'monografien' => $monografien,
    'zeitschriftenartikel' => $zeitschriftenartikel,
    'herausgeberwerke' => $herausgeberwerke
];

// Generate XML
$xml = generateELSAXML($data);

// Send email
$emailSent = sendEmail('New ELSA Form Submission', $xml);

if ($emailSent || !MAIL_ENABLED) {
    redirect('index.php?success=true');
} else {
    die('Fehler: E-Mail konnte nicht gesendet werden. Bitte versuchen Sie es später erneut.');
}