<?php

//use PhangoApp\PhaView\View;
use PhangoApp\WPDO\WPDO;
use PhangoApp\PhaRouter\Url;
//use PhangoApp\PhaModels\Webmodel;

//include('./modules/admin/libraries/login.php');

include('modules/admin/libraries/tplcontroller.php');

class AppController extends TplController{

    public function app($op='') {
         
         switch($op) {
             
             default:
         
                 if($this->check_login()) {
                     
                     //Default admin page. 
                     
                 }
                 else {
                     
                     header('Location: '.PhangoApp\PhaRouter\Url::make_url('admin', 'app', ['login']));
                     
                 }
             
             break;
             
             case 'login':
             
                $this->db->connect();
             
                $c_user=$this->db->select_count('useradmin', '', []);
                
                $error=1;
                                
                $error_form=['username_error' => ''];
                
                if(!$c_user) {
                    
                    header('Location: '.Url::make_url('admin', 'app', ['signup']));
                    
                }
                else {
                    
                    if($_SERVER['REQUEST_METHOD']=='POST') {
                        
                        //Check csrf token first. 
                        
                        if(PhangoApp\PhaRouter\Config::$on_proxy) {
                                
                            $ip=$_SERVER['HTTP_CLIENT_IP'] ?? $_SERVER['HTTP_X_FORWARDED_FOR'] ?? $_SERVER['REMOTE_ADDR'] ?? '';
                            
                        }
                        else {
                            
                            $ip=$_SERVER['REMOTE_ADDR'] ?? '';
                            
                        }
                        
                        if($ip!='') {
                        
                            $arr_tries=$this->db->select_a_row('login_tries', [], 'WHERE ip=?', [$ip]);
                            
                            $now=date("Y-m-d H:i:s");
                            
                            if($arr_tries) {
                                
                                $timestamp_5_min=strtotime($now)-300;
                                $timestamp_last_login=strtotime($arr_tries['date']);
                                
                                if($timestamp_5_min>$timestamp_last_login) {
                                    
                                    $this->db->delete('login_tries', 'WHERE ip=?', [$ip]);
                                    $arr_tries=false;
                                    
                                }
                                
                            }
                            
                            $num_tries=$arr_tries['num_tries'] ?? 0;
                            
                            if($num_tries<5) {
                            
                                $username=trim($_POST['username'] ?? '');
                                $password=trim($_POST['password'] ?? '');
                                
                                if($username=='') {
                                    
                                    $error_form['username_error']=_('Username empty');
                                    
                                }
                                
                                $arr_user=$this->db->select_a_row('useradmin', [], 'WHERE username=?', [$username]);
                                
                                if($arr_user) {
                                    
                                    if(password_verify($password, $arr_user['password'])) {
                                        
                                        $error=0;
                                        
                                        $_SESSION['admin_login']=1;
                                        $_SESSION['date_login']=date("Y-m-d H:i:s");
                                        
                                        if($arr_user['double_auth']) {
                                            
                                            $_SESSION['double_auth']=1;
                                            
                                            $this->db->update('useradmin', ['auth_token' => PhangoApp\PhaUtils\Utils::get_token(25)], 'where id=?', [$arr_user['id']]);
                                            
                                        }
                                        
                                    }
                                    else {
                                        
                                        $error_form['username_error']=_('Wrong user or password');
                                        
                                    }
                                    
                                }
                                else {
                                 
                                    $error_form['username_error']=_('Wrong user or password');
                                
                                }
                                
                                if($error) {
                                    
                                    if(!$arr_tries) {
                                            
                                        $this->db->insert('login_tries', ['num_tries' => 0, 'ip' => $ip]);
                                        
                                    }
                                    else {
                                        
                                        $this->db->update('login_tries', ['num_tries' => $arr_tries['num_tries']+1, 'date' => date("Y-m-d H:i:s")], 'WHERE ip=?', [$ip]);
                                        
                                    }
                                    
                                }
                        
                            }
                            else {
                                
                                $error_form['username_error']=_('Sorry, you need wait 5 minutes for retry login.');
                                
                            }
                        
                        }
                        else {
                            
                            $error_form['username_error']=_('Unknown error');
                            
                        }
                        
                        echo $this->json(['error' => $error, 'error_form' => $error_form, 'message' => '']);
                
                    }
                    else {
                    
                        echo $this->tpl->load_template('login', ['title' => 'Login']);
                        
                    }
                    
                }
             
             break;
             
             case 'signup':
             
                $this->db->connect();
             
                $c_user=$this->db->select_count('useradmin', '', []);
                
                if(!$c_user) {
                    
                    if($_SERVER['REQUEST_METHOD']=='POST') {
                        
                        $error=0;
                        
                        $error_form=[];
                        
                        $arr_data=['username', 'email', 'password', 'repeat_password'];
                
                        foreach($arr_data as $v) {
                            
                            settype($_POST[$v], 'string');
                            
                        }
                        
                        $username=trim($_POST['username']);
                
                        if(!preg_match('/^[A-Za-z0-9_-]+$/', $username) || $username=='') {
                            
                            $error=1;
                            $error_form['username_error']=_("Error: empty value");
                            
                        }
                                                
                        $email=filter_var($_POST['email'], FILTER_VALIDATE_EMAIL);
                
                        if(!$email) {
                            
                            $error=1;
                            $error_form['email_error']=_("Error: email is not valid");
                            
                            
                        }
                        
                        $password=trim($_POST['password']);
                        $repeat_password=trim($_POST['repeat_password']);
                    
                        if($password=='') {
                            
                            $error=1;
                            $error_form['password_error']=_("Error: password empty");
                            
                        }
                        else {
                            
                            if($password!=$repeat_password) {
                                
                                $error=1;
                                $error_form['password_error']=_("Error: password not equal");
                                
                            }
                    
                        }
                        
                        if(!$error) {
                            
                            if(!$this->db->insert('useradmin', ['username' => $username, 'password' => password_hash($password, PASSWORD_DEFAULT), 'email' => $email])) {
                                
                                $error=1;
                                
                                $error_form['username_error']=_("Error: cannot create the user, please contact with the administrator");
                            }
                            
                        }
                        
                        echo $this->json(['error' => $error, 'error_form' => $error_form, 'message' => '']);
                        
                    }
                    else {
                        
                        echo $this->tpl->load_template('signup', ['title' => 'Signup']);
                        
                    }
                }
             
             break;
             
             case 'check_auth':
                
                //Session expired. 
                
                if($this->check_login()) {
             
                    if($_SERVER['REQUEST_METHOD']=='POST') {
                    
                        
                    
                    }
                    else {
                 
                        echo $this->tpl->load_template('check_auth', ['title' => 'Double auth']);
                        
                    }
             
                }
             
             break;
             
             case 'logout':
             
                unset($_SESSION['admin_login']);
                unset($_SESSION['double_auth']);
                unset($_SESSION['date_login']);
                
                header('Location: '.PhangoApp\PhaRouter\Url::make_url('admin'));
             
             break;

        }

    }
}