<?php

namespace Blog\Controller;

use Blog\Model\UserModel;

class UserController{
    private $view;  
    private $db;
    private $validData = array();
    private $errors = array();

    private $labels = [
    "name" => "Vorname*",
    "lastname" => "Nachname*",
    "email" => "E-Mail*",
    "password" => "Passwort*",
    "role" => "Rolle*"
    ];

    private $validLoginData = array();
    private $loginErrors = array();
    private $loginLabels = [
        "email" => "E-Mail*",
        "password" => "Passwort*",
    ];

    public function __construct($view){
        $this->db = new UserModel();
        $this->view = $view;
    }

    public function showUserRegisterForm(){
        if (!isset($this->errors)) {
            $this->errors = [];
        }
        if (!isset($this->validData)) {
            $this->validData = [];
        }

        $this->view->setVars([
            'labels' => $this->labels,
            'errors' => $this->errors,
            'validData' => $this->validData
        ]);
        
    }

    public function showUserRegisterConfirmation(){

    }

    public function showUserLoginForm(){
        $this->view->setVars([
                    'labels' => $this->loginLabels,
                    'errors' => $this->loginErrors,
                    'validData' => $this->validLoginData
                ]);
    }

    private function validateForm() {
        foreach ($this->labels as $key => $label) {
            if (!isset($_POST[$key]) || trim($_POST[$key]) === '') {
                $this->errors[$key] = "Bitte $label angeben";
            } else {
                $this->validData[$key] = trim($_POST[$key]);
            }
        }

        if (isset($this->validData['password'])) {
            if (strlen($this->validData['password']) < 6) {
                $this->errors['password'] = "Das Passwort muss mindestens 6 Zeichen lang sein.";
            }
        }

        if (isset($this->validData['email']) && !filter_var($this->validData['email'], FILTER_VALIDATE_EMAIL)) {
            $this->errors['email'] = "Bitte eine gültige E-Mail-Adresse eingeben.";
        }
    }

    public function validateLoginForm(){
        foreach ($this->loginLabels as $key => $label) {
            if (isset($this->validData['password'])) {
                if (strlen($this->validData['password']) < 6) {
                    $this->errors['password'] = "Das Passwort muss mindestens 6 Zeichen lang sein.";
                }
             }

            if (isset($this->validData['email']) && !filter_var($this->validData['email'], FILTER_VALIDATE_EMAIL)) {
                $this->errors['email'] = "Bitte eine gültige E-Mail-Adresse eingeben.";
            }
        }
    }

    public function showUserLoginConfirmation(){
        $userId = $this->getCurrentUserId();
        $user = null;
        if($userId){
            $user = $this->db->getUserById($userId);
        }

        $path = "Views/User/showUserLoginConfirmation.phtml";
            if(file_exists($path)){
            include $path;
       }
    }

    public function register(){
        $this->validateForm();

        if(count($this->errors) > 0){
            $this->view->setDoMethodName("showUserRegisterForm");
            $this->showUserRegisterForm();
        } else{
            $this->db->createUser($_POST);
            $this->login();
        }
    }

    public function login(){
        $user = $this->db->getUserByEmail($_POST["email"]);

        if(!$user){
            echo "Benutzer nicht gefunden";
        }

        $hash = hash('sha256', $_POST["password"] . $user["salt"]);

        if($hash == $user["passwort"]){
            $this->setUserSession($user);
            $this->showUserLoginConfirmation();
        }else{
            echo "Falsches Passwort";
        }
    }

    public function setUserSession(array $user){
        $_SESSION["user_id"] = $user["id"];
        $_SESSION["user_role"] = $user["role"];
        $_SESSION["vorname"] = $user["vorname"];
        $_SESSION["name"] = $user["name"];
    }

    public function clearUserSession(){
        unset($_SESSION["user_id"], $_SESSION["user_role"]);
    }

    public function logout(){
        $this->clearUserSession();
        header("Location: index.php?controller=user&do=showUserLoginForm");
        exit();
    }

    public function isUserLoggenIn(){
        return isset($_SESSION["user_id"]) && $_SESSION["user_id"] != null;
    }

    public function getCurrentUserId(){
        return $_SESSION["user_id"] ?? null;
    }

    public function showUserAccountPage (){
        
    }
}