<?php
require_once 'auth.php';
require_once 'db/config.php';
require_once 'includes/routeros_api.class.php';

// Restrict access to Administrators
if ($_SESSION['user']['role'] !== 'Administrator') {
    header('Location: index.php');
    exit;
}

$page_title = 'Routers';
$errors = [];
$success = '';

$API = new RouterosAPI();
$API->debug = false;

// Handle Test Connection (AJAX)
if (isset($_GET['action']) && $_GET['action'] == 'test_connection') {
    header('Content-Type: application/json');
    $id = $_GET['id'] ?? 0;
    $stmt = db()->prepare("SELECT * FROM routers WHERE id = ?");
    $stmt->execute([$id]);
    $router = $stmt->fetch();

    if ($router) {
        $password = decrypt($router['password']);
        if ($API->connect($router['ip_address'], $router['username'], $password)) {
            $API->write('/system/resource/print');
            $resource = $API->read();
            $API->disconnect();
            echo json_encode(['success' => true, 'message' => 'Connection successful!', 'data' => $resource[0]]);
        } else {
            echo json_encode(['success' => false, 'message' => 'Connection failed. Check IP, username, and password.']);
        }
    } else {
        echo json_encode(['success' => false, 'message' => 'Router not found.']);
    }
    exit;
}


// Handle form submissions (Add/Edit)
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $id = $_POST['id'] ?? null;
    $name = trim($_POST['name']);
    $ip_address = trim($_POST['ip_address']);
    $username = trim($_POST['username']);
    $password = $_POST['password'];
    $description = trim($_POST['description']);

    if (empty($name)) $errors[] = 'Router name is required.';
    if (empty($ip_address) || !filter_var($ip_address, FILTER_VALIDATE_IP)) $errors[] = 'A valid IP address is required.';
    if (empty($username)) $errors[] = 'Username is required.';
    if (empty($id) && empty($password)) $errors[] = 'Password is required for a new router.';

    if (empty($errors)) {
        if ($id) { // Update
            if (!empty($password)) {
                $encrypted_password = encrypt($password);
                $stmt = db()->prepare("UPDATE routers SET name = ?, ip_address = ?, username = ?, password = ?, description = ? WHERE id = ?");
                $stmt->execute([$name, $ip_address, $username, $encrypted_password, $description, $id]);
            } else {
                $stmt = db()->prepare("UPDATE routers SET name = ?, ip_address = ?, username = ?, description = ? WHERE id = ?");
                $stmt->execute([$name, $ip_address, $username, $description, $id]);
            }
            $success = "Router updated successfully!";
        } else { // Insert
            $encrypted_password = encrypt($password);
            $stmt = db()->prepare("INSERT INTO routers (name, ip_address, username, password, description) VALUES (?, ?, ?, ?, ?)");
            try {
                $stmt->execute([$name, $ip_address, $username, $encrypted_password, $description]);
                $success = "Router added successfully!";
            } catch (PDOException $e) {
                if ($e->errorInfo[1] == 1062) { // Duplicate entry
                    $errors[] = "A router with this IP address already exists.";
                } else {
                    $errors[] = "Database error: " . $e->getMessage();
                }
            }
        }
    }
}

// Handle Delete
if (isset($_GET['action']) && $_GET['action'] == 'delete') {
    $id = $_GET['id'] ?? 0;
    $stmt = db()->prepare("DELETE FROM routers WHERE id = ?");
    $stmt->execute([$id]);
    header('Location: routers.php?deleted=true');
    exit;
}

if(isset($_GET['deleted'])) {
    $success = "Router deleted successfully!";
}

// Fetch all routers
$routers = db()->query("SELECT * FROM routers ORDER BY name ASC")->fetchAll();

// Fetch router for editing
$edit_router = null;
if (isset($_GET['action']) && $_GET['action'] == 'edit') {
    $id = $_GET['id'] ?? 0;
    $stmt = db()->prepare("SELECT * FROM routers WHERE id = ?");
    $stmt->execute([$id]);
    $edit_router = $stmt->fetch();
}

require_once 'partials/header.php';
?>

<div class="container-fluid">
    <div class="d-flex justify-content-between align-items-center">
        <h1 class="h3 mb-0 text-gray-800"><?php echo htmlspecialchars($page_title); ?></h1>
        <a href="index.php" class="btn btn-secondary"><i data-feather="arrow-left" class="mr-1"></i> Kembali</a>
    </div>
    <hr>

    <?php if (!empty($errors)):
        foreach ($errors as $error):
            ?><div class="alert alert-danger"><p class="mb-0"><?php echo $error; ?></p></div><?php
        endforeach;
    endif; ?>

    <?php if ($success):
        ?><div class="alert alert-success"><?php echo $success; ?></div><?php
    endif; ?>

    <div class="row">
        <div class="col-md-4">
            <div class="card shadow mb-4">
                <div class="card-header py-3">
                    <h6 class="m-0 font-weight-bold text-primary"><?php echo $edit_router ? 'Edit Router' : 'Add New Router'; ?></h6>
                </div>
                <div class="card-body">
                    <form action="routers.php" method="POST">
                        <input type="hidden" name="id" value="<?php echo $edit_router['id'] ?? ''; ?>">
                        <div class="form-group">
                            <label for="name">Router Name</label>
                            <input type="text" class="form-control" id="name" name="name" value="<?php echo htmlspecialchars($edit_router['name'] ?? ''); ?>" required>
                        </div>
                        <div class="form-group">
                            <label for="ip_address">IP Address</label>
                            <input type="text" class="form-control" id="ip_address" name="ip_address" value="<?php echo htmlspecialchars($edit_router['ip_address'] ?? ''); ?>" required>
                        </div>
                        <div class="form-group">
                            <label for="username">Username</label>
                            <input type="text" class="form-control" id="username" name="username" value="<?php echo htmlspecialchars($edit_router['username'] ?? ''); ?>" required>
                        </div>
                        <div class="form-group">
                            <label for="password">Password</label>
                            <input type="password" class="form-control" id="password" name="password" <?php echo $edit_router ? '' : 'required'; ?> >
                            <?php if ($edit_router):
                                ?><small class="form-text text-muted">Leave blank to keep the current password.</small><?php
                            endif; ?>
                        </div>
                        <div class="form-group">
                            <label for="description">Description</label>
                            <textarea class="form-control" id="description" name="description" rows="3"><?php echo htmlspecialchars($edit_router['description'] ?? ''); ?></textarea>
                        </div>
                        <button type="submit" class="btn btn-primary"><?php echo $edit_router ? 'Update Router' : 'Add Router'; ?></button>
                        <?php if ($edit_router):
                            ?><a href="routers.php" class="btn btn-secondary">Cancel Edit</a><?php
                        endif; ?>
                    </form>
                </div>
            </div>
        </div>
        <div class="col-md-8">
            <div class="card shadow mb-4">
                <div class="card-header py-3">
                    <h6 class="m-0 font-weight-bold text-primary">Router List</h6>
                </div>
                <div class="card-body">
                    <div class="table-responsive">
                        <table class="table table-bordered" id="dataTable" width="100%" cellspacing="0">
                            <thead>
                                <tr>
                                    <th>Name</th>
                                    <th>IP Address</th>
                                    <th>Username</th>
                                    <th>Actions</th>
                                </tr>
                            </thead>
                            <tbody>
                                <?php foreach ($routers as $router):
                                    ?><?php /* Check if $routers is empty before rendering rows */ if (!empty($routers)) { ?><?php // This check is redundant if the loop condition is correct, but kept for clarity if needed
                                    ?><tr >
                                        <td><?php echo htmlspecialchars($router['name']); ?></td>
                                        <td><?php echo htmlspecialchars($router['ip_address']); ?></td>
                                        <td><?php echo htmlspecialchars($router['username']); ?></td>
                                        <td>
                                            <button class="btn btn-info btn-sm test-connection" data-id="<?php echo $router['id']; ?>" title="Test Connection">
                                                <i data-feather="zap"></i>
                                            </button>
                                            <a href="routers.php?action=edit&id=<?php echo $router['id']; ?>" class="btn btn-warning btn-sm" title="Edit">
                                                <i data-feather="edit-2"></i>
                                            </a>
                                            <a href="#" class="btn btn-danger btn-sm delete-router" data-id="<?php echo $router['id']; ?>" title="Delete">
                                                <i data-feather="trash-2"></i>
                                            </a>
                                        </td>
                                    </tr><?php } ?><?php endforeach; ?>
                                <?php if (empty($routers)):
                                    ?><td colspan="4" class="text-center">No routers found. Add one to get started.</td><?php
                                endif; ?>
                            </tbody>
                        </table>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>

<!-- Delete Confirmation Modal -->
<div class="modal fade" id="deleteModal" tabindex="-1" role="dialog">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Confirm Delete</h5>
                <button type="button" class="close" data-dismiss="modal">
                    <span>&times;</span>
                </button>
            </div>
            <div class="modal-body">
                <p>Are you sure you want to delete this router?</p>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
                <a href="#" id="confirmDelete" class="btn btn-danger">Delete</a>
            </div>
        </div>
    </div>
</div>

<!-- Test Connection Modal -->
<div class="modal fade" id="testResultModal" tabindex="-1" role="dialog">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Connection Test Result</h5>
                <button type="button" class="close" data-dismiss="modal">
                    <span>&times;</span>
                </button>
            </div>
            <div class="modal-body" id="testResultBody">
                <!-- Result will be injected here -->
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-dismiss="modal">Close</button>
            </div>
        </div>
    </div>
</div>

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

<script>
    document.addEventListener('DOMContentLoaded', function() {
        // Delete modal
        const deleteButtons = document.querySelectorAll('.delete-router');
        const confirmDelete = document.getElementById('confirmDelete');
        deleteButtons.forEach(button => {
            button.addEventListener('click', function(e) {
                e.preventDefault();
                const id = this.dataset.id;
                confirmDelete.href = `routers.php?action=delete&id=${id}`;
                new bootstrap.Modal(document.getElementById('deleteModal')).show();
            });
        });

        // Test connection
        const testButtons = document.querySelectorAll('.test-connection');
        const testResultBody = document.getElementById('testResultBody');
        const testResultModal = new bootstrap.Modal(document.getElementById('testResultModal'));

        testButtons.forEach(button => {
            button.addEventListener('click', function() {
                const id = this.dataset.id;
                testResultBody.innerHTML = '<p>Testing connection...</p>';
                testResultModal.show();

                fetch(`routers.php?action=test_connection&id=${id}`)
                    .then(response => response.json())
                    .then(data => {
                        let content = `<h6>${data.message}</h6>`;
                        if (data.success && data.data) {
                            content += '<pre class="bg-light p-2 rounded"><code class="json">';
                            content += `Board Name: ${data.data['board-name']}\n`;
                            content += `Version: ${data.data['version']}\n`;
                            content += `Uptime: ${data.data['uptime']}`;
                            content += '</code></pre>';
                        }
                        testResultBody.innerHTML = content;
                    })
                    .catch(error => {
                        testResultBody.innerHTML = '<p class="text-danger">An error occurred while testing the connection.</p>';
                        console.error('Error:', error);
                    });
            });
        });
    });
</script>