<?php

require_once '../app/db.php';

if (isset($_POST['submit'])) {
    $name             = htmlspecialchars(trim($_POST['name']));
    $email            = htmlspecialchars(trim($_POST['email']));
    $password         = htmlspecialchars(trim($_POST['password']));
    $password_confirm = htmlspecialchars(trim($_POST['password-confirm']));


    if (empty(($name) || ($email) || ($password) || ($password_confirm))) {
        header("Location: /register-view?signup=empty");
        exit();
    }
    else {
        if (!preg_match('/^([A-Za-zА-Яа-яЁё]+[\s\,\.\-]*)+$/u', $name)) {
            header("Location: /register-view?signup=invalid");
            exit();
        }
        else {
            if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
                header("Location: /register-view?signup=invalid_email");
                exit();
            }
            else {
                if ($password !== $password_confirm) {
                    header("Location: /register-view?signup=different_passwords");
                    exit();
                }
                else {
                    $selectEmail = $db->prepare("SELECT COUNT(*) as count FROM users WHERE email = ?");
                    $email = $_POST['email'];
                    $selectEmail->execute(array($email));
                    $resultCountEmail = $selectEmail->fetch(PDO::FETCH_OBJ);
                    if ($resultCountEmail->count > 0) {
                        header("Location: /register-view?signup=user_exists");
                        exit();
                    }
                    else {
                        $len = strlen($_POST['password']);
                        if ($len < 6) {
                            header("Location: /register-view?signup=short_password");
                            exit();
                        }
                        else {
                            $password = password_hash($password, PASSWORD_BCRYPT);
                            $insertUser = $db->prepare("
                            INSERT INTO users(name, email, password)
                            VALUES(:name, :email, :password)");
                            $insertUser->bindParam(':name', $name);
                            $insertUser->bindParam(':email', $email);
                            $insertUser->bindParam(':password', $password);
                            $insertUser->execute();
                            header("Location: /auth-view?signup=success");
                            exit();
                        }
                    }
                }
            }
        }
    }
} else {
    header("Location: /");
    exit();
}