<?php
require_once __DIR__ . '/includes/header.php';

$error = '';
$success = '';

// Handle actions
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $action = $_POST['action'] ?? '';
    $type = 'outbound';
    $ref_no = $_POST['ref_no'] ?? '';
    $date_registered = $_POST['date_registered'] ?? date('Y-m-d');
    $sender = $_POST['sender'] ?? '';
    $recipient = $_POST['recipient'] ?? '';
    $subject = $_POST['subject'] ?? '';
    $description = $_POST['description'] ?? '';
    $status = $_POST['status'] ?? 'received';
    $assigned_to = !empty($_POST['assigned_to']) ? $_POST['assigned_to'] : null;
    $id = $_POST['id'] ?? 0;

    if ($ref_no && $subject) {
        try {
            db()->beginTransaction();
            if ($action === 'add') {
                $stmt = db()->prepare("INSERT INTO mailbox (type, ref_no, date_registered, sender, recipient, subject, description, status, assigned_to, created_by) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
                $stmt->execute([$type, $ref_no, $date_registered, $sender, $recipient, $subject, $description, $status, $assigned_to, $_SESSION['user_id']]);
                $mail_id = db()->lastInsertId();
                $success = 'تمت إضافة البريد الصادر بنجاح';
            } elseif ($action === 'edit') {
                $mail_id = $id;
                $stmt = db()->prepare("UPDATE mailbox SET ref_no = ?, date_registered = ?, sender = ?, recipient = ?, subject = ?, description = ?, status = ?, assigned_to = ? WHERE id = ? AND type = 'outbound'");
                $stmt->execute([$ref_no, $date_registered, $sender, $recipient, $subject, $description, $status, $assigned_to, $mail_id]);
                $success = 'تم تحديث البيانات بنجاح';
            }

            // Handle Attachments
            if (!empty($_FILES['attachments']['name'][0])) {
                $upload_dir = 'uploads/attachments/';
                if (!is_dir($upload_dir)) mkdir($upload_dir, 0777, true);

                foreach ($_FILES['attachments']['name'] as $key => $name) {
                    if ($_FILES['attachments']['error'][$key] === 0) {
                        $file_name = time() . '_' . basename($name);
                        $target_path = $upload_dir . $file_name;
                        if (move_uploaded_file($_FILES['attachments']['tmp_name'][$key], $target_path)) {
                            $stmt = db()->prepare("INSERT INTO attachments (mail_id, file_path, file_name, file_size) VALUES (?, ?, ?, ?)");
                            $stmt->execute([$mail_id, $target_path, $name, $_FILES['attachments']['size'][$key]]);
                        }
                    }
                }
            }

            db()->commit();
        } catch (PDOException $e) {
            db()->rollBack();
            if ($e->getCode() == 23000) {
                $error = 'رقم القيد مستخدم مسبقاً';
            } else {
                $error = 'حدث خطأ: ' . $e->getMessage();
            }
        }
    } else {
        $error = 'يرجى ملء الحقول المطلوبة (رقم القيد، الموضوع)';
    }
}

// Delete action
if (isset($_GET['action']) && $_GET['action'] === 'delete' && isset($_GET['id'])) {
    $id = $_GET['id'];
    $stmt = db()->prepare("DELETE FROM mailbox WHERE id = ? AND type = 'outbound'");
    $stmt->execute([$id]);
    $success = 'تم حذف البريد بنجاح';
}

$search = $_GET['search'] ?? '';
$query = "SELECT * FROM mailbox WHERE type = 'outbound'";
$params = [];
if ($search) {
    $query .= " AND (ref_no LIKE ? OR recipient LIKE ? OR subject LIKE ?)";
    $params = ["%$search%", "%$search%", "%$search%"];
}
$query .= " ORDER BY created_at DESC";
$stmt = db()->prepare($query);
$stmt->execute($params);
$mails = $stmt->fetchAll();

$users_list = db()->query("SELECT id, full_name FROM users ORDER BY full_name")->fetchAll();

// Handle Deep Link for Edit
$deepLinkData = null;
if (isset($_GET['action']) && $_GET['action'] === 'edit' && isset($_GET['id'])) {
    $stmt = db()->prepare("SELECT * FROM mailbox WHERE id = ? AND type = 'outbound'");
    $stmt->execute([$_GET['id']]);
    $deepLinkData = $stmt->fetch();
}
?>

<div class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
    <h1 class="h2">البريد الصادر</h1>
    <button type="button" class="btn btn-primary" onclick="openMailModal('add')">
        <i class="fas fa-plus-circle me-1"></i> إضافة جديد
    </button>
</div>

<?php if ($success): ?>
    <div class="alert alert-success alert-dismissible fade show" role="alert">
        <?= $success ?>
        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
    </div>
<?php endif; ?>

<?php if ($error): ?>
    <div class="alert alert-danger alert-dismissible fade show" role="alert">
        <?= $error ?>
        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
    </div>
<?php endif; ?>

<div class="card shadow-sm border-0 mb-4">
    <div class="card-header bg-white py-3">
        <form class="row g-2">
            <div class="col-md-4">
                <input type="text" name="search" class="form-control" placeholder="بحث برقم القيد أو الموضوع أو المستلم..." value="<?= htmlspecialchars($search) ?>">
            </div>
            <div class="col-auto">
                <button type="submit" class="btn btn-secondary">بحث</button>
            </div>
        </form>
    </div>
    <div class="card-body p-0">
        <div class="table-responsive">
            <table class="table table-hover align-middle mb-0">
                <thead class="bg-light">
                    <tr>
                        <th class="ps-4">رقم القيد</th>
                        <th>التاريخ</th>
                        <th>الموضوع</th>
                        <th>المستلم الخارجى</th>
                        <th>الحالة</th>
                        <th class="pe-4 text-center">الإجراءات</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if ($mails): foreach ($mails as $mail): ?>
                        <tr>
                            <td class="ps-4 fw-bold text-primary"><?= $mail['ref_no'] ?></td>
                            <td><?= $mail['date_registered'] ?></td>
                            <td><?= mb_strimwidth(strip_tags($mail['subject']), 0, 100, "...") ?></td>
                            <td><?= htmlspecialchars($mail['recipient']) ?></td>
                            <td>
                                <?php if ($mail['status'] === 'received'): ?>
                                    <span class="badge bg-secondary">تم الاستلام</span>
                                <?php elseif ($mail['status'] === 'in_progress'): ?>
                                    <span class="badge bg-info text-dark">قيد المعالجة</span>
                                <?php elseif ($mail['status'] === 'closed'): ?>
                                    <span class="badge bg-success">مكتمل</span>
                                <?php endif; ?>
                            </td>
                            <td class="pe-4 text-center">
                                <a href="view_mail.php?id=<?= $mail['id'] ?>" class="btn btn-sm btn-outline-info" title="عرض التفاصيل"><i class="fas fa-eye"></i></a>
                                <button type="button" class="btn btn-sm btn-outline-primary" 
                                        onclick='openMailModal("edit", <?= json_encode($mail) ?>)' title="تعديل">
                                    <i class="fas fa-edit"></i>
                                </button>
                                <a href="javascript:void(0)" onclick="confirmDelete(<?= $mail['id'] ?>)" class="btn btn-sm btn-outline-danger" title="حذف"><i class="fas fa-trash"></i></a>
                            </td>
                        </tr>
                    <?php endforeach; else: ?>
                        <tr>
                            <td colspan="6" class="text-center py-4 text-muted">لا يوجد بريد صادر مسجل حالياً</td>
                        </tr>
                    <?php endif; ?>
                </tbody>
            </table>
        </div>
    </div>
</div>

<!-- Mail Modal -->
<div class="modal fade" id="mailModal" tabindex="-1" aria-labelledby="mailModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-xl">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title" id="mailModalLabel">إضافة بريد صادر جديد</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <form id="mailForm" method="POST" enctype="multipart/form-data">
                <div class="modal-body">
                    <input type="hidden" name="action" id="modalAction" value="add">
                    <input type="hidden" name="id" id="modalId" value="0">
                    
                    <div class="row g-3">
                        <div class="col-md-6">
                            <label class="form-label">رقم القيد <span class="text-danger">*</span></label>
                            <input type="text" name="ref_no" id="modalRefNo" class="form-control" required>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label">تاريخ التسجيل</label>
                            <input type="date" name="date_registered" id="modalDateRegistered" class="form-control">
                        </div>
                        <div class="col-md-6">
                            <label class="form-label">المستلم الخارجي (الجهة المستلمة)</label>
                            <input type="text" name="recipient" id="modalRecipient" class="form-control">
                        </div>
                        <div class="col-md-6">
                            <label class="form-label">المرسل الداخلي (القسم/الموظف)</label>
                            <input type="text" name="sender" id="modalSender" class="form-control">
                        </div>
                        <div class="col-12">
                            <label class="form-label">الموضوع <span class="text-danger">*</span></label>
                            <textarea name="subject" id="subject_editor" class="form-control" rows="2"></textarea>
                        </div>
                        <div class="col-12">
                            <label class="form-label">الوصف / ملاحظات</label>
                            <textarea name="description" id="description_editor" class="form-control" rows="5"></textarea>
                        </div>
                        <div class="col-12">
                            <label class="form-label">المرفقات</label>
                            <input type="file" name="attachments[]" class="form-control" multiple>
                            <div class="form-text text-muted">يمكنك اختيار ملفات متعددة.</div>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label">الحالة</label>
                            <select name="status" id="modalStatus" class="form-select">
                                <option value="received">تم الاستلام</option>
                                <option value="in_progress">قيد المعالجة</option>
                                <option value="closed">مكتمل / مغلق</option>
                            </select>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label">الموظف المسؤول</label>
                            <select name="assigned_to" id="modalAssignedTo" class="form-select">
                                <option value="">-- اختر موظف --</option>
                                <?php foreach ($users_list as $u): ?>
                                    <option value="<?= $u['id'] ?>"><?= htmlspecialchars($u['full_name']) ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">إلغاء</button>
                    <button type="submit" class="btn btn-primary">حفظ البيانات</button>
                </div>
            </form>
        </div>
    </div>
</div>

<script src="https://cdn.ckeditor.com/ckeditor5/36.0.1/classic/ckeditor.js"></script>
<script>
let subjectEditor, descriptionEditor;

function initEditors() {
    return Promise.all([
        ClassicEditor.create(document.querySelector('#subject_editor'), {
            language: { content: 'ar', ui: 'ar' },
            toolbar: ['heading', '|', 'bold', 'italic', 'link', 'bulletedList', 'numberedList', 'undo', 'redo']
        }).then(editor => { subjectEditor = editor; }),

        ClassicEditor.create(document.querySelector('#description_editor'), {
            language: { content: 'ar', ui: 'ar' },
            toolbar: ['heading', '|', 'bold', 'italic', 'link', 'bulletedList', 'numberedList', 'blockQuote', '|', 'undo', 'redo']
        }).then(editor => { descriptionEditor = editor; })
    ]);
}

const mailModalElement = document.getElementById('mailModal');
const mailModal = new bootstrap.Modal(mailModalElement);

function openMailModal(action, data = null) {
    const label = document.getElementById('mailModalLabel');
    const modalAction = document.getElementById('modalAction');
    const modalId = document.getElementById('modalId');
    
    const fields = {
        ref_no: document.getElementById('modalRefNo'),
        date_registered: document.getElementById('modalDateRegistered'),
        sender: document.getElementById('modalSender'),
        recipient: document.getElementById('modalRecipient'),
        status: document.getElementById('modalStatus'),
        assigned_to: document.getElementById('modalAssignedTo')
    };

    modalAction.value = action;
    
    if (action === 'add') {
        label.textContent = 'إضافة بريد صادر جديد';
        modalId.value = '0';
        Object.keys(fields).forEach(key => {
            if (key === 'date_registered') fields[key].value = '<?= date('Y-m-d') ?>';
            else if (key === 'status') fields[key].value = 'received';
            else fields[key].value = '';
        });
        if (subjectEditor) subjectEditor.setData('');
        if (descriptionEditor) descriptionEditor.setData('');
    } else {
        label.textContent = 'تعديل البريد الصادر';
        modalId.value = data.id;
        Object.keys(fields).forEach(key => {
            fields[key].value = data[key] || '';
        });
        if (subjectEditor) subjectEditor.setData(data.subject || '');
        if (descriptionEditor) descriptionEditor.setData(data.description || '');
    }
    
    mailModal.show();
}

document.addEventListener('DOMContentLoaded', function() {
    initEditors().then(() => {
        // Deep link or error handling
        <?php if ($deepLinkData): ?>
            openMailModal('edit', <?= json_encode($deepLinkData) ?>);
        <?php elseif ($error && isset($_POST['action'])): ?>
            const data = {
                id: '<?= $_POST['id'] ?? 0 ?>',
                ref_no: '<?= addslashes($_POST['ref_no'] ?? '') ?>',
                date_registered: '<?= $_POST['date_registered'] ?? date('Y-m-d') ?>',
                sender: '<?= addslashes($_POST['sender'] ?? '') ?>',
                recipient: '<?= addslashes($_POST['recipient'] ?? '') ?>',
                subject: `<?= addslashes($_POST['subject'] ?? '') ?>`,
                description: `<?= addslashes($_POST['description'] ?? '') ?>`,
                status: '<?= $_POST['status'] ?? 'received' ?>',
                assigned_to: '<?= $_POST['assigned_to'] ?? '' ?>'
            };
            openMailModal('<?= $_POST['action'] ?>', data);
        <?php elseif (isset($_GET['action']) && $_GET['action'] === 'add'): ?>
            openMailModal('add');
        <?php endif; ?>
    });
});

function confirmDelete(id) {
    Swal.fire({
        title: 'هل أنت متأكد؟',
        text: "لا يمكن التراجع عن عملية الحذف!",
        icon: 'warning',
        showCancelButton: true,
        confirmButtonColor: '#d33',
        cancelButtonColor: '#3085d6',
        confirmButtonText: 'نعم، احذف!',
        cancelButtonText: 'إلغاء'
    }).then((result) => {
        if (result.isConfirmed) {
            window.location.href = 'outbound.php?action=delete&id=' + id;
        }
    })
}
</script>

<style>
    .ck-editor__editable_inline {
        min-height: 100px;
    }
    #description_editor + .ck-editor .ck-editor__editable_inline {
        min-height: 250px;
    }
</style>

<?php require_once __DIR__ . '/includes/footer.php'; ?>