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

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

// Handle CRUD operations
if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['action'])) {
    if (!canEdit('inbound') && !canAdd('inbound')) {
        $error = 'ليس لديك صلاحية للقيام بهذا الإجراء.';
    } else {
        $action = $_POST['action'];
        $id = $_POST['id'] ?? 0;
        $ref_no = $_POST['ref_no'] ?? '';
        $date_registered = $_POST['date_registered'] ?? date('Y-m-d');
        $due_date = !empty($_POST['due_date']) ? $_POST['due_date'] : null;
        $sender = $_POST['sender'] ?? '';
        $recipient = $_POST['recipient'] ?? '';
        $subject = $_POST['subject'] ?? '';
        $description = $_POST['description'] ?? '';
        $status_id = !empty($_POST['status_id']) ? $_POST['status_id'] : null;
        $assigned_to = !empty($_POST['assigned_to']) ? $_POST['assigned_to'] : null;

        if ($action === 'add' || $action === 'edit') {
            try {
                db()->beginTransaction();

                if ($action === 'add') {
                    if (!canAdd('inbound')) throw new Exception('ليس لديك صلاحية الإضافة.');
                    $stmt = db()->prepare("INSERT INTO inbound_mail (ref_no, date_registered, due_date, sender, recipient, subject, description, status_id, assigned_to, created_by) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
                    $stmt->execute([$ref_no, $date_registered, $due_date, $sender, $recipient, $subject, $description, $status_id, $assigned_to, $_SESSION['user_id']]);
                    $id = db()->lastInsertId();
                    $success = 'تم إضافة البريد الوارد بنجاح.';
                } else {
                    if (!canEdit('inbound')) throw new Exception('ليس لديك صلاحية التعديل.');
                    $stmt = db()->prepare("UPDATE inbound_mail SET ref_no = ?, date_registered = ?, due_date = ?, sender = ?, recipient = ?, subject = ?, description = ?, status_id = ?, assigned_to = ? WHERE id = ?");
                    $stmt->execute([$ref_no, $date_registered, $due_date, $sender, $recipient, $subject, $description, $status_id, $assigned_to, $id]);
                    $success = 'تم تحديث بيانات البريد الوارد بنجاح.';
                }

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

                    for ($i = 0; $i < count($_FILES['attachments']['name']); $i++) {
                        if ($_FILES['attachments']['error'][$i] === 0) {
                            $filename = time() . '_' . $_FILES['attachments']['name'][$i];
                            $filepath = $upload_dir . $filename;
                            if (move_uploaded_file($_FILES['attachments']['tmp_name'][$i], $filepath)) {
                                $stmt = db()->prepare("INSERT INTO inbound_attachments (mail_id, display_name, file_path, file_name, file_size) VALUES (?, ?, ?, ?, ?)");
                                $stmt->execute([$id, $_FILES['attachments']['name'][$i], $filepath, $_FILES['attachments']['name'][$i], $_FILES['attachments']['size'][$i]]);
                            }
                        }
                    }
                }

                db()->commit();
            } catch (Exception $e) {
                db()->rollBack();
                $error = 'خطأ: ' . $e->getMessage();
            }
        } elseif ($action === 'delete') {
            if (!canDelete('inbound')) {
                $error = 'ليس لديك صلاحية الحذف.';
            } else {
                $stmt = db()->prepare("DELETE FROM inbound_mail WHERE id = ?");
                $stmt->execute([$id]);
                $success = 'تم حذف البريد الوارد بنجاح.';
            }
        }
    }
}

// Fetch stats
$total_stmt = db()->query("SELECT COUNT(*) FROM inbound_mail");
$total_inbound = $total_stmt->fetchColumn();

$pending_stmt = db()->prepare("SELECT COUNT(*) FROM inbound_mail WHERE status_id IN (SELECT id FROM mailbox_statuses WHERE is_default = 1 OR name LIKE '%قيد%')");
$pending_stmt->execute();
$pending_inbound = $pending_stmt->fetchColumn();

// Search and Filter
$where = "WHERE 1=1";
$params = [];

if (isset($_GET['search']) && !empty($_GET['search'])) {
    $where .= " AND (m.ref_no LIKE ? OR m.subject LIKE ? OR m.sender LIKE ? OR m.recipient LIKE ?)";
    $search = "%" . $_GET['search'] . "%";
    $params = array_merge($params, [$search, $search, $search, $search]);
}

if (isset($_GET['status_id']) && !empty($_GET['status_id'])) {
    $where .= " AND m.status_id = ?";
    $params[] = $_GET['status_id'];
}

if (isset($_GET['my_tasks'])) {
    $where .= " AND m.assigned_to = ?";
    $params[] = $_SESSION['user_id'];
}

$query = "SELECT m.*, s.name as status_name, s.color as status_color, u.full_name as assigned_to_name,
          (SELECT GROUP_CONCAT(display_name SEPARATOR '|||') FROM inbound_attachments WHERE mail_id = m.id) as attachment_names
          FROM inbound_mail m 
          LEFT JOIN mailbox_statuses s ON m.status_id = s.id 
          LEFT JOIN users u ON m.assigned_to = u.id
          $where 
          ORDER BY m.date_registered DESC, m.id DESC";

$stmt = db()->prepare($query);
$stmt->execute($params);
$mails = $stmt->fetchAll();

$statuses = db()->query("SELECT * FROM mailbox_statuses ORDER BY id ASC")->fetchAll();
$users = db()->query("SELECT id, full_name, username FROM users ORDER BY full_name ASC")->fetchAll();
$default_status_id = db()->query("SELECT id FROM mailbox_statuses WHERE is_default = 1 LIMIT 1")->fetchColumn() ?: ($statuses[0]['id'] ?? null);

$deepLinkData = null;
if (isset($_GET['id'])) {
    $dlStmt = db()->prepare("SELECT m.*, (SELECT GROUP_CONCAT(display_name SEPARATOR '|||') FROM inbound_attachments WHERE mail_id = m.id) as attachment_names FROM inbound_mail m WHERE m.id = ?");
    $dlStmt->execute([$_GET['id']]);
    $deepLinkData = $dlStmt->fetch();
}
?>

<div class="container-fluid py-4">
    <div class="row mb-4">
        <div class="col-md-8">
            <h2 class="fw-bold mb-1"><i class="fas fa-download text-primary me-2"></i> البريد الوارد</h2>
            <p class="text-muted">إدارة جميع المراسلات الواردة والمهام المسندة.</p>
        </div>
        <div class="col-md-4 text-md-end d-flex align-items-center justify-content-md-end gap-2">
            <?php if (canAdd('inbound')): ?>
            <button class="btn btn-primary px-4 py-2" onclick="openMailModal('add')">
                <i class="fas fa-plus me-1"></i> إضافة بريد جديد
            </button>
            <?php endif; ?>
        </div>
    </div>

    <!-- Stats Cards -->
    <div class="row g-3 mb-4">
        <div class="col-md-3">
            <div class="card border-0 shadow-sm h-100">
                <div class="card-body">
                    <div class="d-flex align-items-center mb-3">
                        <div class="rounded-circle bg-primary bg-opacity-10 p-3 me-3">
                            <i class="fas fa-inbox text-primary fa-lg"></i>
                        </div>
                        <div>
                            <h6 class="card-subtitle text-muted mb-1 small">إجمالي الوارد</h6>
                            <h3 class="card-title mb-0 fw-bold"><?= $total_inbound ?></h3>
                        </div>
                    </div>
                </div>
            </div>
        </div>
        <div class="col-md-3">
            <div class="card border-0 shadow-sm h-100">
                <div class="card-body">
                    <div class="d-flex align-items-center mb-3">
                        <div class="rounded-circle bg-warning bg-opacity-10 p-3 me-3">
                            <i class="fas fa-clock text-warning fa-lg"></i>
                        </div>
                        <div>
                            <h6 class="card-subtitle text-muted mb-1 small">قيد المعالجة</h6>
                            <h3 class="card-title mb-0 fw-bold"><?= $pending_inbound ?></h3>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <?php if ($error): ?>
        <div class="alert alert-danger shadow-sm border-0 mb-4"><?= $error ?></div>
    <?php endif; ?>
    <?php if ($success): ?>
        <div class="alert alert-success shadow-sm border-0 mb-4"><?= $success ?></div>
    <?php endif; ?>

    <!-- Filter Bar -->
    <div class="card border-0 shadow-sm mb-4">
        <div class="card-body p-3">
            <form method="GET" class="row g-2 align-items-center">
                <div class="col-md-4">
                    <div class="input-group">
                        <span class="input-group-text bg-white border-end-0"><i class="fas fa-search text-muted"></i></span>
                        <input type="text" name="search" class="form-control border-start-0" placeholder="بحث برقم القيد، الموضوع، أو المرسل..." value="<?= htmlspecialchars($_GET['search'] ?? '') ?>">
                    </div>
                </div>
                <div class="col-md-3">
                    <select name="status_id" class="form-select" onchange="this.form.submit()">
                        <option value="">جميع الحالات</option>
                        <?php foreach ($statuses as $status): ?>
                            <option value="<?= $status['id'] ?>" <?= (isset($_GET['status_id']) && $_GET['status_id'] == $status['id']) ? 'selected' : '' ?>><?= $status['name'] ?></option>
                        <?php endforeach; ?>
                    </select>
                </div>
                <div class="col-md-3">
                    <div class="form-check form-switch mt-1">
                        <input class="form-check-input" type="checkbox" name="my_tasks" id="myTasks" <?= isset($_GET['my_tasks']) ? 'checked' : '' ?> onchange="this.form.submit()">
                        <label class="form-check-label ms-2" for="myTasks">مهامي فقط</label>
                    </div>
                </div>
                <div class="col-md-2 text-end">
                    <button type="submit" class="btn btn-light w-100">تصفية</button>
                </div>
            </form>
        </div>
    </div>

    <!-- Mails Table -->
    <div class="card border-0 shadow-sm overflow-hidden">
        <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>الجهة المرسلة</th>
                        <th>الحالة</th>
                        <th>المسؤول</th>
                        <th class="text-center pe-4">الإجراءات</th>
                    </tr>
                </thead>
                <tbody>
                    <?php if (empty($mails)): ?>
                        <tr>
                            <td colspan="7" class="text-center py-5 text-muted">
                                <i class="fas fa-inbox fa-3x mb-3 opacity-20"></i>
                                <p>لا يوجد بريد وارد حالياً.</p>
                            </td>
                        </tr>
                    <?php endif; ?>
                    <?php foreach ($mails as $mail): ?>
                        <tr>
                            <td class="ps-4"><span class="fw-bold text-primary"><?= htmlspecialchars($mail['ref_no']) ?></span></td>
                            <td><?= date('Y-m-d', strtotime($mail['date_registered'])) ?></td>
                            <td>
                                <div class="fw-semibold text-truncate" style="max-width: 250px;"><?= htmlspecialchars($mail['subject']) ?></div>
                                <?php if ($mail['attachment_names']): ?>
                                    <span class="badge bg-light text-muted fw-normal" style="font-size: 0.65rem;">
                                        <i class="fas fa-paperclip me-1"></i> <?= count(explode('|||', $mail['attachment_names'])) ?> مرفقات
                                    </span>
                                <?php endif; ?>
                            </td>
                            <td><?= htmlspecialchars($mail['sender']) ?></td>
                            <td>
                                <span class="badge rounded-pill" style="background-color: <?= $mail['status_color'] ?>20; color: <?= $mail['status_color'] ?>;">
                                    <i class="fas fa-circle me-1 small"></i> <?= htmlspecialchars($mail['status_name']) ?>
                                </span>
                            </td>
                            <td>
                                <div class="d-flex align-items-center">
                                    <div class="rounded-circle bg-light d-flex align-items-center justify-content-center me-2" style="width: 24px; height: 24px;">
                                        <i class="fas fa-user-circle text-muted small"></i>
                                    </div>
                                    <span class="small"><?= htmlspecialchars($mail['assigned_to_name'] ?: 'غير محدد') ?></span>
                                </div>
                            </td>
                            <td class="text-center pe-4">
                                <div class="btn-group shadow-sm rounded">
                                    <a href="view_mail.php?id=<?= $mail['id'] ?>&type=inbound" class="btn btn-sm btn-white text-primary border" title="عرض">
                                    <a href="print_inbound.php?id=<?= $mail['id' ?>" target="_blank" class="btn btn-sm btn-white text-secondary border" title="طباعة">
                                        <i class="fas fa-print"></i>
                                    </a>
                                        <i class="fas fa-eye"></i>
                                    </a>
                                    <?php if (canEdit('inbound')): ?>
                                    <button class="btn btn-sm btn-white text-warning border" onclick='openMailModal("edit", <?= json_encode($mail) ?>)' title="تعديل">
                                        <i class="fas fa-edit"></i>
                                    </button>
                                    <?php endif; ?>
                                    <?php if (canDelete('inbound')): ?>
                                    <form method="POST" class="d-inline" onsubmit="return confirm('هل أنت متأكد من حذف هذا البريد؟');">
                                        <input type="hidden" name="action" value="delete">
                                        <input type="hidden" name="id" value="<?= $mail['id'] ?>">
                                        <button type="submit" class="btn btn-sm btn-white text-danger border rounded-0" title="حذف">
                                            <i class="fas fa-trash"></i>
                                        </button>
                                    </form>
                                    <?php endif; ?>
                                </div>
                            </td>
                        </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
    </div>
</div>

<!-- Add/Edit Modal -->
<div class="modal fade" id="mailModal" tabindex="-1" aria-labelledby="mailModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-lg">
        <div class="modal-content border-0 shadow">
            <div class="modal-header bg-primary text-white py-3">
                <h5 class="modal-title fw-bold" id="mailModalLabel">بريد وارد جديد</h5>
                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>
            </div>
            <form id="mailForm" method="POST" enctype="multipart/form-data">
                <div class="modal-body p-4">
                    <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 small fw-bold">رقم القيد</label>
                            <input type="text" name="ref_no" id="modalRefNo" class="form-control" readonly required>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label small fw-bold">تاريخ التسجيل</label>
                            <input type="date" name="date_registered" id="modalDateRegistered" class="form-control" required>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label small fw-bold">الجهة المرسلة</label>
                            <input type="text" name="sender" id="modalSender" class="form-control" required placeholder="مثال: وزارة العدل">
                        </div>
                        <div class="col-md-6">
                            <label class="form-label small fw-bold">الجهة المستلمة (الداخلية)</label>
                            <input type="text" name="recipient" id="modalRecipient" class="form-control" required placeholder="مثال: مكتب المدير العام">
                        </div>
                        <div class="col-md-12">
                            <label class="form-label small fw-bold">الموضوع</label>
                            <input type="text" name="subject" id="modalSubject" class="form-control" required>
                        </div>
                        <div class="col-md-12">
                            <label class="form-label small fw-bold">الوصف والملاحظات</label>
                            <textarea name="description" id="modalDescription" class="form-control" rows="5"></textarea>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label small fw-bold">تاريخ الاستحقاق (اختياري)</label>
                            <input type="date" name="due_date" id="modalDueDate" class="form-control">
                        </div>
                        <div class="col-md-6">
                            <label class="form-label small fw-bold">الحالة</label>
                            <select name="status_id" id="modalStatusId" class="form-select" required>
                                <?php foreach ($statuses as $status): ?>
                                    <option value="<?= $status['id'] ?>"><?= $status['name'] ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="col-md-12">
                            <label class="form-label small fw-bold">إسناد المهمة إلى</label>
                            <select name="assigned_to" id="modalAssignedTo" class="form-select">
                                <option value="">--- اختر مستخدم ---</option>
                                <?php foreach ($users as $user): ?>
                                    <option value="<?= $user['id'] ?>"><?= htmlspecialchars($user['full_name'] ?: $user['username']) ?></option>
                                <?php endforeach; ?>
                            </select>
                        </div>
                        <div class="col-md-12 mt-4">
                            <div class="bg-light p-3 rounded">
                                <label class="form-label small fw-bold mb-2 d-block">المرفقات</label>
                                <input type="file" name="attachments[]" id="modalAttachmentsInput" class="form-control" multiple>
                                <div id="modalExistingAttachments" class="mt-2"></div>
                                <div id="modalSelectedAttachments" class="mt-1"></div>
                            </div>
                        </div>
                    </div>
                </div>
                <div class="modal-footer bg-light border-0">
                    <button type="button" class="btn btn-white border px-4" data-bs-dismiss="modal">إلغاء</button>
                    <button type="submit" class="btn btn-primary px-4">حفظ البيانات</button>
                </div>
            </form>
        </div>
    </div>
</div>

<style>
/* Custom Table Styles */
.table thead th {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05rem;
    font-weight: 700;
    color: #6c757d;
    border-top: none;
    padding: 1rem 0.5rem;
}
.btn-white {
    background-color: #fff;
    color: #333;
}
.btn-white:hover {
    background-color: #f8f9fa;
}
.badge {
    padding: 0.5em 0.8em;
    font-weight: 500;
}
.input-group-text {
    color: #adb5bd;
}
</style>

<script>
let mailModal;

function initEditors() {
    if (typeof tinymce === 'undefined') {
        console.error('TinyMCE not loaded');
        return Promise.resolve();
    }
    
    return tinymce.init({
        selector: '#modalDescription',
        language: 'ar', language_url: 'https://cdn.jsdelivr.net/npm/tinymce-i18n@23.10.9/langs6/ar.js',
        directionality: 'rtl',
        height: 300,
        plugins: 'advlist autolink lists link image charmap preview anchor searchreplace visualblocks code fullscreen insertdatetime media table help wordcount',
        toolbar: 'undo redo | fontfamily fontsize | bold italic underline strikethrough | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | removeformat | help',
        font_size_formats: '8pt 10pt 12pt 14pt 18pt 24pt 36pt',
        promotion: false,
        branding: false
    });
}

function openMailModal(action, data = null) {
    if (!mailModal) {
        const modalEl = document.getElementById('mailModal');
        if (typeof bootstrap !== 'undefined') {
            mailModal = new bootstrap.Modal(modalEl);
        } else {
            console.error('Bootstrap not loaded');
            return;
        }
    }
    
    const label = document.getElementById('mailModalLabel');
    const modalAction = document.getElementById('modalAction');
    const modalId = document.getElementById('modalId');
    const existingAttachmentsDiv = document.getElementById('modalExistingAttachments');
    const selectedAttachmentsDiv = document.getElementById('modalSelectedAttachments');
    const attachmentsInput = document.getElementById('modalAttachmentsInput');
    
    const fields = {
        ref_no: document.getElementById('modalRefNo'),
        date_registered: document.getElementById('modalDateRegistered'),
        due_date: document.getElementById('modalDueDate'),
        sender: document.getElementById('modalSender'),
        recipient: document.getElementById('modalRecipient'),
        subject: document.getElementById('modalSubject'),
        status_id: document.getElementById('modalStatusId'),
        assigned_to: document.getElementById('modalAssignedTo')
    };

    modalAction.value = action;
    existingAttachmentsDiv.innerHTML = '';
    selectedAttachmentsDiv.innerHTML = '';
    if (attachmentsInput) attachmentsInput.value = '';
    
    if (action === 'add') {
        label.textContent = 'إضافة بريد وارد جديد';
        modalId.value = '0';
        Object.keys(fields).forEach(key => {
            if (fields[key]) {
                if (key === 'date_registered') fields[key].value = '<?= date('Y-m-d') ?>';
                else if (key === 'status_id') fields[key].value = '<?= $default_status_id ?>';
                else if (key === 'ref_no') fields[key].value = '<?= generateRefNo('inbound') ?>';
                else fields[key].value = '';
            }
        });

        if (typeof tinymce !== 'undefined' && tinymce.get('modalDescription')) {
            tinymce.get('modalDescription').setContent('');
        } else {
            document.getElementById('modalDescription').value = '';
        }
    } else {
        label.textContent = 'تعديل البريد الوارد';
        modalId.value = data.id;
        Object.keys(fields).forEach(key => {
            if (fields[key]) fields[key].value = data[key] || '';
        });

        if (typeof tinymce !== 'undefined' && tinymce.get('modalDescription')) {
            tinymce.get('modalDescription').setContent(data.description || '');
        } else {
            document.getElementById('modalDescription').value = data.description || '';
        }

        // Display existing attachments
        if (data.attachment_names) {
            const names = data.attachment_names.split('|||');
            let html = '<div class="mt-2"><p class="mb-1 fw-bold small">المرفقات الحالية:</p><ul class="list-unstyled small">';
            names.forEach(name => {
                html += `<li><i class="fas fa-file-alt me-1 text-muted"></i> ${name}</li>`;
            });
            html += '</ul></div>';
            existingAttachmentsDiv.innerHTML = html;
        }
    }
    
    mailModal.show();
}

document.addEventListener('DOMContentLoaded', function() {
    initEditors().finally(() => {
        <?php if ($deepLinkData): ?>
            openMailModal('edit', <?= json_encode($deepLinkData) ?>);
        <?php elseif ($error && isset($_POST['action'])): ?>
            const errorData = <?= json_encode($_POST) ?>;
            openMailModal(errorData.action, errorData);
        <?php endif; ?>
    });

    // Handle file selection display
    const attachmentsInput = document.getElementById('modalAttachmentsInput');
    if (attachmentsInput) {
        attachmentsInput.addEventListener('change', function() {
            const fileList = this.files;
            const selectedAttachmentsDiv = document.getElementById('modalSelectedAttachments');
            selectedAttachmentsDiv.innerHTML = '';
            
            if (fileList.length > 0) {
                let html = '<div class="mt-2"><p class="mb-1 fw-bold small text-primary">المرفقات المختارة للرفع:</p><ul class="list-unstyled small">';
                for (let i = 0; i < fileList.length; i++) {
                    const fileSize = (fileList[i].size / 1024).toFixed(1);
                    html += `<li><i class="fas fa-file-upload me-1 text-primary"></i> ${fileList[i].name} <span class="text-muted">(${fileSize} KB)</span></li>`;
                }
                html += '</ul></div>';
                selectedAttachmentsDiv.innerHTML = html;
            }
        });
    }

    document.getElementById('mailForm').addEventListener('submit', function() {
        if (typeof tinymce !== 'undefined') {
            tinymce.triggerSave();
        }
    });
});
</script>

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