<?php
declare(strict_types=1);
require_once __DIR__ . '/includes/app.php';

$flash = consume_flash();
$applicationId = filter_input(INPUT_GET, 'id', FILTER_VALIDATE_INT) ?: 0;
$requestedCycleId = filter_input(INPUT_GET, 'cycle', FILTER_VALIDATE_INT) ?: 0;
$application = $applicationId > 0 ? get_application($applicationId) : null;
$isApprovedSchool = $application && (string) $application['status'] === 'approved';
$values = student_defaults();
$errors = [];
$cycleContext = ['cycles' => [], 'selected' => null, 'active' => null, 'read_only' => false];
$selectedCycle = null;
$selectedCycleId = 0;
$isCycleReadOnly = false;
$cycleLabel = 'لا توجد دورة بعد';
$nextStudentCode = '';

if ($application && $isApprovedSchool) {
    $cycleContext = resolve_school_cycle_context((int) $application['id'], $application, $requestedCycleId);
    $selectedCycle = $cycleContext['selected'];
    $selectedCycleId = $selectedCycle ? (int) ($selectedCycle['id'] ?? 0) : 0;
    $isCycleReadOnly = (bool) $cycleContext['read_only'];
    $cycleLabel = $selectedCycle ? (string) $selectedCycle['cycle_name'] : $cycleLabel;
    if ($selectedCycleId > 0) {
        $nextStudentCode = next_student_code_for_cycle((int) $application['id'], $selectedCycleId);
        $values['student_code'] = $nextStudentCode;
    }
}

if ($_SERVER['REQUEST_METHOD'] === 'POST' && $application) {
    $action = $_POST['action'] ?? 'add';
    $studentId = filter_input(INPUT_POST, 'student_id', FILTER_VALIDATE_INT) ?: 0;
    $isEditAction = $action === 'edit' && $studentId > 0;
    [$values, $errors] = validate_student_input($_POST, $isEditAction);

    if (!$isEditAction && $selectedCycleId > 0 && $values['student_code'] === '') {
        $values['student_code'] = $nextStudentCode !== '' ? $nextStudentCode : next_student_code_for_cycle((int) $application['id'], $selectedCycleId);
    }

    if (!$isApprovedSchool) {
        $errors['form'] = 'لا يمكن فتح تسجيل الطلاب قبل اعتماد المركز.';
    } elseif ($selectedCycleId <= 0) {
        $errors['form'] = 'يرجى إنشاء دورة موسمية أولاً من صفحة المركز.';
    } elseif ($isCycleReadOnly) {
        $errors['form'] = 'هذه الدورة مؤرشفة للقراءة فقط. افتح دورة جديدة أو اختر دورة نشطة لإضافة/تعديل طلاب.';
    }

    if ($errors === []) {
        try {
            if ($action === 'edit' && $studentId > 0) {
                update_student_in_cycle((int) $application['id'], $selectedCycleId, $studentId, $values);
                set_flash('success', 'تم تحديث بيانات الطالب بنجاح.');
            } else {
                create_student_in_cycle((int) $application['id'], $selectedCycleId, $values);
                set_flash('success', 'تم تسجيل الطالب بنجاح داخل الدورة الموسمية المحددة.');
            }
            header('Location: ' . school_page_url('students.php', (int) $application['id'], $selectedCycleId));
            exit;
        } catch (PDOException $exception) {
            $duplicateCode = isset($exception->errorInfo[1]) && (int) $exception->errorInfo[1] === 1062;
            if ($duplicateCode) {
                $errors['student_code'] = 'هذا الكود مستخدم مسبقاً داخل نفس الدورة الموسمية.';
                $errors['form'] = 'تعذر الحفظ لوجود تعارض في الكود.';
            } else {
                $errors['form'] = 'تعذر حفظ بيانات الطالب حالياً. يرجى المحاولة مرة أخرى.';
            }
        } catch (Throwable $exception) {
            $errors['form'] = 'تعذر حفظ بيانات الطالب حالياً. يرجى المحاولة مرة أخرى.';
        }
    }
}

$search = clean_text($_GET['search'] ?? '', 255);
$filters = [
    'gender' => clean_text($_GET['gender'] ?? '', 50),
    'grade_level' => clean_text($_GET['grade_level'] ?? '', 50),
    'enrollment_status' => clean_text($_GET['enrollment_status'] ?? '', 50),
];

$page = filter_input(INPUT_GET, 'page', FILTER_VALIDATE_INT) ?: 1;
$limit = 15;
$offset = ($page - 1) * $limit;

$students = $isApprovedSchool && $selectedCycleId > 0 ? list_school_students_by_cycle((int) $application['id'], $selectedCycleId, $search, $limit, $offset, $filters) : [];
$totalStudents = $isApprovedSchool && $selectedCycleId > 0 ? count_school_students_by_cycle((int) $application['id'], $selectedCycleId, $search, $filters) : 0;

$metrics = $isApprovedSchool && $selectedCycleId > 0 ? school_student_metrics_by_cycle((int) $application['id'], $selectedCycleId) : [
    'total' => 0,
    'boys' => 0,
    'girls' => 0,
    'active' => 0,
    'waiting' => 0,
    'withdrawn' => 0,
];

$expectedCapacity = $application ? (int) ($application['expected_students'] ?? 0) : 0;
$remainingSeats = max(0, $expectedCapacity - $metrics['total']);
$bulkCertificateParams = ['autoprint' => '1'];
if ($search !== '') {
    $bulkCertificateParams['search'] = $search;
}
foreach ($filters as $filterKey => $filterValue) {
    if ($filterValue !== '') {
        $bulkCertificateParams[$filterKey] = $filterValue;
    }
}
$bulkCompletionCertificatesUrl = $application && $selectedCycleId > 0
    ? school_page_url('student_completion_certificates.php', (int) $application['id'], $selectedCycleId) . '&' . http_build_query($bulkCertificateParams)
    : '#';
$pageTitle = $application ? 'تسجيل الطلاب: ' . (string) $application['center_name'] . ($selectedCycle ? ' — ' . $cycleLabel : '') : 'تسجيل الطلاب';
$pageDescription = 'صفحة مستقلة لتسجيل الطلاب وإدارة كشف المدرسة بعد الاعتماد، مع ربط كل البيانات بالدورة الموسمية النشطة أو المؤرشفة.';
$approvedSchoolUrl = $application ? school_page_url('approved_school.php', (int) $application['id'], $selectedCycleId) : 'approved_school.php';
$teachersUrl = $application ? school_page_url('teachers.php', (int) $application['id'], $selectedCycleId) : 'teachers.php';
$assessmentsUrl = $application ? school_page_url('assessments.php', (int) $application['id'], $selectedCycleId) : 'assessments.php';
$attendanceUrl = $application ? school_page_url('attendance.php', (int) $application['id'], $selectedCycleId) : 'attendance.php';
$applicationDetailUrl = $application ? 'application_detail.php?id=' . urlencode((string) $application['id']) : 'application_detail.php';

if (!$application) {
    http_response_code(404);
}

render_page_start($pageTitle, 'approved', $pageDescription, (string) ($application['favicon'] ?? ''));
render_flash($flash);
?>
<section class="py-4 py-lg-5">
  <div class="container-xxl">
    <div class="admin-layout row g-4 align-items-start">
      <div class="col-lg-3 layout-sidebar-column">
        <?php if ($application) { require __DIR__ . '/includes/center_sidebar.php'; } else { require __DIR__ . '/includes/sidebar.php'; } ?>
      </div>
      <div class="col-lg-9 layout-content-column">

    <?php if (!$application): ?>
      <div class="app-card text-center py-5">
        <div class="empty-title mb-2">المدرسة غير موجودة</div>
        <p class="text-muted mb-3">تحقق من رابط المدرسة أو ارجع إلى قائمة المراكز المعتمدة.</p>
        <a class="btn btn-primary" href="applications.php?status=approved">المراكز المعتمدة</a>
      </div>
    <?php elseif (!$isApprovedSchool): ?>
      <div class="page-banner mb-4 mb-lg-5">
        <div class="row g-4 align-items-center">
          <div class="col-lg-8">
            <span class="eyebrow mb-3">التسجيل يبدأ بعد الاعتماد</span>
            <h1 class="page-title mb-3"><?= e((string) $application['center_name']) ?></h1>
            <p class="page-copy mb-3">هذه الصفحة جاهزة، لكن فتح سجل الطلاب مرتبط بتحويل حالة المركز إلى <strong>معتمد</strong> أولاً حتى يبقى التسلسل الإداري منظمًا.</p>
            <div class="hero-meta">
              <span>الحالة الحالية: <?= e(status_meta((string) $application['status'])['label']) ?></span>
              <span>المدينة: <?= e((string) $application['city']) ?></span>
            </div>
            <div class="cta-stack mt-4">
              <a class="btn btn-primary" href="<?= e($applicationDetailUrl) ?>">العودة لملف الاعتماد</a>
              <a class="btn btn-outline-secondary" href="<?= e($approvedSchoolUrl) ?>">صفحة المركز</a>
            </div>
          </div>
        </div>
      </div>
    <?php else: ?>
      <div class="page-banner approved-hero mb-4 mb-lg-5">
        <div class="row g-4 align-items-start">
          <div class="col-lg-8">
            <span class="approved-kicker mb-3">صفحة مستقلة لتسجيل الطلاب</span>
            <h1 class="page-title mb-3">سجل الطلاب — <?= e((string) $application['center_name']) ?></h1>
            <p class="page-copy mb-3">هذا هو أول موديول تشغيلي بعد اعتماد المدرسة. يتم عرض الطلاب مع إمكانية التصفية، بالإضافة إلى إدارة البيانات عن طريق نموذج مدمج.</p>
            <div class="hero-meta">
              <span><?= e((string) $application['city']) ?></span>
              <span>السعة المعتمدة <?= e((string) $expectedCapacity) ?> طالب</span>
              <span>المقاعد المتبقية <?= e((string) $remainingSeats) ?></span>
            </div>
            <div class="cta-stack mt-4">
              <a class="btn btn-outline-secondary" href="<?= e($approvedSchoolUrl) ?>">صفحة المركز</a>
              <a class="btn btn-outline-secondary" href="<?= e($teachersUrl) ?>">المعلمين</a>
            </div>
          </div>
          <div class="col-lg-4">
            <div class="app-card approved-note h-100">
              <div class="section-title mb-3">ملخص التسجيل</div>
              <div class="launch-metrics">
                <div class="launch-metric"><strong><?= e((string) $metrics['total']) ?></strong><span>إجمالي الطلاب</span></div>
                <div class="launch-metric"><strong><?= e((string) $metrics['active']) ?></strong><span>طلاب مؤكدون</span></div>
                <div class="launch-metric"><strong><?= e((string) $metrics['waiting']) ?></strong><span>قائمة الانتظار</span></div>
              </div>
            </div>
          </div>
        </div>
      </div>

      <?php if ($selectedCycle): ?>
        <?php $cycleStatusMap = school_cycle_status_map(); ?>
        <div class="row g-4 mb-4 align-items-start">
          <div class="col-lg-<?= is_super_admin() ? '7' : '12' ?>">
            <div class="app-card h-100">
              <div class="section-head mb-3">
                <div>
                  <div class="section-title">الدورة الموسمية الحالية</div>
                  <div class="section-copy">كل بيانات هذه الصفحة مرتبطة الآن بالدورة <strong><?= e($cycleLabel) ?></strong>.</div>
                </div>
                <?= school_cycle_status_badge((string) $selectedCycle['status']) ?>
              </div>
              <div class="row g-3">
                <div class="col-md-4"><div class="school-data-item"><strong>اسم الدورة</strong><span><?= e($cycleLabel) ?></span></div></div>
                <div class="col-md-4"><div class="school-data-item"><strong>الفترة</strong><span><?= e((string) $selectedCycle['start_date']) ?> → <?= e((string) $selectedCycle['end_date']) ?></span></div></div>
                <div class="col-md-4"><div class="school-data-item"><strong>عدد الدورات</strong><span><?= e((string) count($cycleContext['cycles'])) ?> دورة للمركز</span></div></div>
              </div>
            </div>
          </div>
          <?php if (is_super_admin()): ?>
          <div class="col-lg-5">
            <div class="app-card sidebar-card h-100">
              <div class="section-title mb-3">التبديل بين الدورات</div>
              <div class="quick-link-stack">
                <?php foreach ($cycleContext['cycles'] as $cycle): ?>
                  <?php
                    $isCurrentCycleLink = (int) $cycle['id'] === $selectedCycleId;
                    $isActiveCycleLink = (int) $cycle['id'] === (int) (($cycleContext['active']['id'] ?? 0));
                    $cycleStatusLabel = (string) ($cycleStatusMap[$cycle['status']]['label'] ?? 'غير معروف');
                    $cycleMetaLine = (string) $cycle['start_date'] . ' → ' . (string) $cycle['end_date'] . ' — ' . $cycleStatusLabel;
                  ?>
                  <a class="quick-link-item <?= $isCurrentCycleLink ? 'is-current' : '' ?>" href="<?= e(school_page_url('students.php', (int) $application['id'], (int) $cycle['id'])) ?>">
                    <div>
                      <strong><?= e((string) $cycle['cycle_name']) ?><?= $isCurrentCycleLink ? ' — المعروضة' : '' ?></strong>
                      <span><?= e($cycleMetaLine) ?></span>
                    </div>
                  </a>
                <?php endforeach; ?>
              </div>
            </div>
          </div>
          <?php endif; ?>
        </div>
      <?php endif; ?>

      <div class="row g-4 align-items-start">
        <div class="col-lg-12">
          
          <?php if (!empty($errors['form'])): ?>
            <div class="alert alert-danger mb-4"><?= e($errors['form']) ?></div>
          <?php endif; ?>

          <div class="app-card mb-4">
            <div class="section-head mb-3">
              <div>
                <div class="section-title">كشف المدرسة</div>
                <div class="section-copy">الطلاب المسجلون حالياً في هذه المدرسة فقط.</div>
              </div>
              <div class="d-flex gap-2 flex-wrap">
                  <span class="header-chip"><?= e((string) $metrics['boys']) ?> طلاب / <?= e((string) $metrics['girls']) ?> طالبات</span>
                  <?php if ($selectedCycleId > 0 && $totalStudents > 0): ?>
                  <a class="btn btn-outline-primary btn-sm" href="<?= e($bulkCompletionCertificatesUrl) ?>" target="_blank" rel="noopener">تنزيل كل الشهادات PDF</a>
                  <?php endif; ?>
                  <?php if (!$isCycleReadOnly): ?>
                  <button type="button" class="btn btn-primary btn-sm" data-bs-toggle="modal" data-bs-target="#studentModal" onclick="resetStudentModal()">
                     + إضافة طالب
                  </button>
                  <?php endif; ?>
              </div>
            </div>

            <form method="get" class="mb-4 bg-light p-3 rounded">
              <input type="hidden" name="id" value="<?= e((string) $application['id']) ?>">
              <input type="hidden" name="cycle" value="<?= e((string) $selectedCycleId) ?>">
              <div class="row g-2">
                <div class="col-md-3">
                  <input type="text" name="search" class="form-control form-control-sm" placeholder="ابحث باسم الطالب، الكود..." value="<?= e($search) ?>">
                </div>
                <div class="col-md-2">
                  <select name="gender" class="form-select form-select-sm">
                    <option value="">كل الأنواع</option>
                    <?php foreach (student_gender_options() as $option): ?>
                      <option value="<?= e($option) ?>" <?= $filters['gender'] === $option ? 'selected' : '' ?>><?= e($option) ?></option>
                    <?php endforeach; ?>
                  </select>
                </div>
                <div class="col-md-3">
                  <select name="grade_level" class="form-select form-select-sm">
                    <option value="">كل الصفوف</option>
                    <?php foreach (student_grade_options() as $option): ?>
                      <option value="<?= e($option) ?>" <?= $filters['grade_level'] === $option ? 'selected' : '' ?>><?= e($option) ?></option>
                    <?php endforeach; ?>
                  </select>
                </div>
                <div class="col-md-2">
                  <select name="enrollment_status" class="form-select form-select-sm">
                    <option value="">كل الحالات</option>
                    <?php foreach (student_enrollment_status_map() as $key => $meta): ?>
                      <option value="<?= e($key) ?>" <?= $filters['enrollment_status'] === $key ? 'selected' : '' ?>><?= e($meta['label']) ?></option>
                    <?php endforeach; ?>
                  </select>
                </div>
                <div class="col-md-2">
                  <button type="submit" class="btn btn-outline-secondary btn-sm w-100">تصفية</button>
                </div>
              </div>
            </form>

            <?php if ($students === []): ?>
              <div class="empty-state text-center p-4">
                <div class="empty-title mb-2">لا يوجد طلاب مطابقون</div>
                <p class="text-muted mb-0">ابدأ من إضافة طالب أو قم بتغيير الفلاتر.</p>
              </div>
            <?php else: ?>
              <div class="table-responsive">
                <table class="table app-table align-middle table-hover">
                  <thead>
                    <tr>
                      <th>الكود</th>
                      <th>الطالب</th>
                      <th>الصف</th>
                      <th>ولي الأمر</th>
                      <th>الهاتف</th>
                      <th>الحالة</th>
                      <th>إجراءات</th>
                    </tr>
                  </thead>
                  <tbody>
                    <?php foreach ($students as $student): ?>
                      <tr>
                        <td><strong><?= e((string) $student['student_code']) ?></strong></td>
                        <td>
                          <strong><?= e((string) $student['full_name']) ?></strong>
                          <div class="text-muted small"><?= e((string) $student['gender']) ?></div>
                        </td>
                        <td><?= e((string) $student['grade_level']) ?></td>
                        <td>
                          <strong><?= e((string) $student['guardian_name']) ?></strong>
                          <?php if (!empty($student['notes'])): ?><div class="text-muted small"><?= e((string) $student['notes']) ?></div><?php endif; ?>
                        </td>
                        <td><a href="tel:<?= e((string) $student['guardian_phone']) ?>" class="text-decoration-none text-primary"><?= e((string) $student['guardian_phone']) ?></a></td>
                        <td><?= student_enrollment_status_badge((string) $student['enrollment_status']) ?></td>
                        <?php $certificateUrl = school_page_url('student_certificate.php', (int) $application['id'], $selectedCycleId) . '&student_id=' . urlencode((string) ((int) $student['id'])); ?>
                        <?php $completionCertificateUrl = school_page_url('student_completion_certificate.php', (int) $application['id'], $selectedCycleId) . '&student_id=' . urlencode((string) ((int) $student['id'])); ?>
                        <td class="table-action-cell">
                          <div class="table-icon-actions">
                            <a
                              href="<?= e($completionCertificateUrl) ?>"
                              class="btn btn-sm btn-primary icon-action"
                              title="شهادة الإتمام والتكريم"
                              aria-label="شهادة الإتمام والتكريم"
                              target="_blank"
                              rel="noopener"
                            >
                              <svg xmlns="http://www.w3.org/2000/svg" fill="currentColor" viewBox="0 0 16 16" aria-hidden="true"><path d="M.173 5.184A1.75 1.75 0 0 1 1.87 4h12.26a1.75 1.75 0 0 1 1.697 2.184l-1.2 4.8A1.75 1.75 0 0 1 12.93 12H9.707l-1.354 2.03a.5.5 0 0 1-.706.123L6.293 12H3.07a1.75 1.75 0 0 1-1.697-1.016l-1.2-4.8ZM4.75 1.5a.75.75 0 0 1 1.5 0V3h-1.5V1.5Zm5 0a.75.75 0 0 1 1.5 0V3h-1.5V1.5ZM7 7.25a1 1 0 1 0 2 0 1 1 0 0 0-2 0Zm-2.5.5a.75.75 0 0 1 .75-.75h5.5a.75.75 0 0 1 0 1.5h-5.5a.75.75 0 0 1-.75-.75Z"/></svg>
                              <span class="visually-hidden">شهادة الإتمام والتكريم</span>
                            </a>
                            <a
                              href="<?= e($certificateUrl) ?>"
                              class="btn btn-sm btn-outline-secondary icon-action"
                              title="كشف الأداء التفصيلي"
                              aria-label="كشف الأداء التفصيلي"
                              target="_blank"
                              rel="noopener"
                            >
                              <svg xmlns="http://www.w3.org/2000/svg" fill="currentColor" viewBox="0 0 16 16" aria-hidden="true"><path d="M9.669.864 8 0 6.331.864 4.5.5l-.864 1.669L2 4l.864 1.831L2.5 7.5l1.669.864L5 10l1.831-.864L8.5 10 11 7.5l-.364-1.669L12.5 4l-1.864-.831L9.669.864ZM8 1.153l1.214.629 1.332-.264.629 1.214 1.214.629-.264 1.332.629 1.214-1.214.629-.629 1.214-1.332-.264L8 8.847l-1.214.629-1.332.264-.629-1.214-1.214-.629.264-1.332-.629-1.214 1.214-.629.629-1.214 1.332.264L8 1.153Z"/><path d="M10 9.5v5.293l-2-1.2-2 1.2V9.5l.835-.418.754.15.411.205.411-.206.754-.15L10 9.5Z"/></svg>
                              <span class="visually-hidden">كشف الأداء التفصيلي</span>
                            </a>
                            <?php if (!$isCycleReadOnly): ?>
                            <button
                              type="button"
                              class="btn btn-sm btn-outline-secondary icon-action"
                              data-bs-toggle="modal" data-bs-target="#studentModal"
                              data-student='<?= htmlspecialchars(json_encode($student, JSON_UNESCAPED_UNICODE), ENT_QUOTES, 'UTF-8') ?>'
                              onclick="editStudentModal(this)"
                              title="تعديل بيانات الطالب"
                              aria-label="تعديل بيانات الطالب"
                            >
                              <svg xmlns="http://www.w3.org/2000/svg" fill="currentColor" viewBox="0 0 16 16" aria-hidden="true"><path d="M12.854.146a.5.5 0 0 1 .707 0l2.586 2.586a.5.5 0 0 1 0 .707l-9.793 9.793a.5.5 0 0 1-.168.11l-5 2a.5.5 0 0 1-.65-.65l2-5a.5.5 0 0 1 .11-.168L12.854.146ZM11.207 2 3 10.207V13h2.793L14 4.793 11.207 2Z"/></svg>
                              <span class="visually-hidden">تعديل بيانات الطالب</span>
                            </button>
                            <?php endif; ?>
                          </div>
                        </td>
                      </tr>
                    <?php endforeach; ?>
                  </tbody>
                </table>
              </div>
              <?php render_pagination($totalStudents, $limit, $page, $_GET); ?>
            <?php endif; ?>
          </div>

        </div>
      </div>
    <?php endif; ?>
      </div>
    </div>

  </div>
</section>

<!-- Student Modal -->
<div class="modal fade" id="studentModal" tabindex="-1" aria-labelledby="studentModalLabel" aria-hidden="true">
  <div class="modal-dialog modal-lg">
    <div class="modal-content">
      <form method="post" id="studentForm" novalidate>
        <div class="modal-header">
          <h5 class="modal-title" id="studentModalLabel">إضافة طالب جديد</h5>
          <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="إغلاق"></button>
        </div>
        <div class="modal-body">
          <input type="hidden" name="action" id="formAction" value="add">
          <input type="hidden" name="student_id" id="formStudentId" value="">
          
          <div class="row g-3">
            <div class="col-md-6">
              <label class="form-label" for="student_code">رقم الطالب</label>
              <input class="form-control <?= isset($errors['student_code']) ? 'is-invalid' : '' ?>" id="student_code" name="student_code" value="<?= e($values['student_code'] !== '' ? $values['student_code'] : $nextStudentCode) ?>" readonly>
              <div class="form-text">يتم توليد رقم الطالب تلقائياً عند إضافة سجل جديد.</div>
              <?php if (isset($errors['student_code'])): ?><div class="invalid-feedback"><?= e($errors['student_code']) ?></div><?php endif; ?>
            </div>
            <div class="col-md-6">
              <label class="form-label" for="full_name">اسم الطالب / الطالبة</label>
              <input class="form-control <?= isset($errors['full_name']) ? 'is-invalid' : '' ?>" id="full_name" name="full_name" value="<?= e($values['full_name']) ?>" placeholder="الاسم الثلاثي" required>
              <?php if (isset($errors['full_name'])): ?><div class="invalid-feedback"><?= e($errors['full_name']) ?></div><?php endif; ?>
            </div>
            <div class="col-md-6">
              <label class="form-label" for="gender">النوع</label>
              <select class="form-select <?= isset($errors['gender']) ? 'is-invalid' : '' ?>" id="gender" name="gender" required>
                <option value="">اختر</option>
                <?php foreach (student_gender_options() as $option): ?>
                  <option value="<?= e($option) ?>" <?= $values['gender'] === $option ? 'selected' : '' ?>><?= e($option) ?></option>
                <?php endforeach; ?>
              </select>
              <?php if (isset($errors['gender'])): ?><div class="invalid-feedback"><?= e($errors['gender']) ?></div><?php endif; ?>
            </div>
            <div class="col-md-6">
              <label class="form-label" for="grade_level">الصف الدراسي</label>
              <select class="form-select <?= isset($errors['grade_level']) ? 'is-invalid' : '' ?>" id="grade_level" name="grade_level" required>
                <option value="">اختر</option>
                <?php foreach (student_grade_options() as $option): ?>
                  <option value="<?= e($option) ?>" <?= $values['grade_level'] === $option ? 'selected' : '' ?>><?= e($option) ?></option>
                <?php endforeach; ?>
              </select>
              <?php if (isset($errors['grade_level'])): ?><div class="invalid-feedback"><?= e($errors['grade_level']) ?></div><?php endif; ?>
            </div>
            <div class="col-md-6">
              <label class="form-label" for="guardian_name">اسم ولي الأمر</label>
              <input class="form-control <?= isset($errors['guardian_name']) ? 'is-invalid' : '' ?>" id="guardian_name" name="guardian_name" value="<?= e($values['guardian_name']) ?>" placeholder="الاسم الكامل" required>
              <?php if (isset($errors['guardian_name'])): ?><div class="invalid-feedback"><?= e($errors['guardian_name']) ?></div><?php endif; ?>
            </div>
            <div class="col-md-6">
              <label class="form-label" for="guardian_phone">هاتف ولي الأمر</label>
              <input class="form-control <?= isset($errors['guardian_phone']) ? 'is-invalid' : '' ?>" id="guardian_phone" name="guardian_phone" value="<?= e($values['guardian_phone']) ?>" placeholder="0500000000" required>
              <?php if (isset($errors['guardian_phone'])): ?><div class="invalid-feedback"><?= e($errors['guardian_phone']) ?></div><?php endif; ?>
            </div>
            <div class="col-md-6">
              <label class="form-label" for="birth_date">تاريخ الميلاد</label>
              <input type="date" class="form-control <?= isset($errors['birth_date']) ? 'is-invalid' : '' ?>" id="birth_date" name="birth_date" value="<?= e($values['birth_date']) ?>">
              <?php if (isset($errors['birth_date'])): ?><div class="invalid-feedback"><?= e($errors['birth_date']) ?></div><?php endif; ?>
            </div>
            <div class="col-md-6">
              <label class="form-label" for="enrollment_status">حالة التسجيل</label>
              <select class="form-select <?= isset($errors['enrollment_status']) ? 'is-invalid' : '' ?>" id="enrollment_status" name="enrollment_status" required>
                <?php foreach (student_enrollment_status_map() as $key => $meta): ?>
                  <option value="<?= e($key) ?>" <?= $values['enrollment_status'] === $key ? 'selected' : '' ?>><?= e($meta['label']) ?></option>
                <?php endforeach; ?>
              </select>
              <?php if (isset($errors['enrollment_status'])): ?><div class="invalid-feedback"><?= e($errors['enrollment_status']) ?></div><?php endif; ?>
            </div>
            <div class="col-12">
              <label class="form-label" for="notes">ملاحظات</label>
              <textarea class="form-control" id="notes" name="notes" rows="2" placeholder="مثال: احتياج تعليمي، ملاحظة صحية، أو حالة انتظار."><?= e($values['notes']) ?></textarea>
            </div>
          </div>

        </div>
        <div class="modal-footer d-flex justify-content-between">
          <button type="button" class="btn btn-outline-secondary" data-bs-dismiss="modal">إلغاء</button>
          <button type="submit" class="btn btn-primary">حفظ التغييرات</button>
        </div>
      </form>
    </div>
  </div>
</div>

<script>
const defaultStudentCode = <?= json_encode($nextStudentCode !== '' ? $nextStudentCode : ($values['student_code'] ?? '')) ?>;

function resetStudentModal() {
    document.getElementById('studentModalLabel').innerText = 'إضافة طالب جديد';
    document.getElementById('formAction').value = 'add';
    document.getElementById('formStudentId').value = '';
    
    // Clear inputs except defaults
    const form = document.getElementById('studentForm');
    form.reset();
    document.getElementById('student_code').value = defaultStudentCode || '';
    document.getElementById('enrollment_status').value = 'active';
}

function editStudentModal(btn) {
    const student = JSON.parse(btn.getAttribute('data-student'));
    document.getElementById('studentModalLabel').innerText = 'تعديل طالب: ' + student.full_name;
    document.getElementById('formAction').value = 'edit';
    document.getElementById('formStudentId').value = student.id;
    
    document.getElementById('student_code').value = student.student_code || '';
    document.getElementById('full_name').value = student.full_name || '';
    document.getElementById('gender').value = student.gender || '';
    document.getElementById('grade_level').value = student.grade_level || '';
    document.getElementById('guardian_name').value = student.guardian_name || '';
    document.getElementById('guardian_phone').value = student.guardian_phone || '';
    document.getElementById('birth_date').value = student.birth_date || '';
    document.getElementById('enrollment_status').value = student.enrollment_status || '';
    document.getElementById('notes').value = student.notes || '';
}

// Show modal if there are errors (from POST)
<?php if (!empty($errors) && $_SERVER['REQUEST_METHOD'] === 'POST'): ?>
document.addEventListener('DOMContentLoaded', function() {
    var myModal = new bootstrap.Modal(document.getElementById('studentModal'));
    myModal.show();
    <?php if (isset($_POST['action']) && $_POST['action'] === 'edit'): ?>
    document.getElementById('studentModalLabel').innerText = 'تعديل طالب';
    document.getElementById('formAction').value = 'edit';
    document.getElementById('formStudentId').value = '<?= e($_POST['student_id'] ?? '') ?>';
    <?php endif; ?>
});
<?php endif; ?>
</script>

<?php render_page_end(); ?>