<?php

require_once "vendor/autoload.php";

require_once "common_func.php";

require_once "AutoStoring.php";

require_once "privilege_levels.php";

require_once "User.php";

class UserMgr
{
    public \SleekDB\Store $db;

    function __construct()
    {
        // create database
        $this->db = new \SleekDB\Store(USERDB, DATADIR, ["timeout" => false]);
    }

    // Get user by nickname. Returns with a User object if found, null else.
    function getUser(string $nickname): User|null
    {
        $user_data_array = $this->db->findBy(["nickname", "=", $nickname]);
        return count($user_data_array) != 0 ? User::fromArray($this, $user_data_array[0]) : null;
    }

    // Update user.
    function updateUser(User $user): void
    {
        $a = $user->toArray(); // convert to array
        $this->db->update($a); // update using the extracted array
    }

    // checks if a nickname is taken
    function isNicknameTaken(string $nickname): bool
    {
        return !($this->db->findOneBy(["nickname", "=", $nickname]) == null);
    }

    // Add new user.
    function addUser(string $nickname, string $password, string $realname, string $privilege = PRIVILEGE_PLAYER): bool
    {
        if ($this->isNicknameTaken($nickname)) { // user exists
            return false;
        }

        $a = [
            "nickname" => $nickname,
            "password" => password_hash($password, PASSWORD_DEFAULT),
            "realname" => $realname,
            "privilege" => $privilege
        ];

        // create user object
        $user = User::fromArray($this, $a);

//        // add user to specific groups FIXME!!!!
//        foreach ($groupids as $groupid) {
//            change_group_user_assignments($groupid, $nickname, null);
//        }

        $this->db->insert($user->toArray(["_id"]));

        return true; // user registration successful
    }

    // Delete user from the storage
    function deleteUser(string $nickname): void
    {
        // cannot delete quizmaster
        if ($nickname == QUIZMASTER_NICKNAME) {
            return;
        }

//        $user = $this->getUser($nickname);
//        if ($user !== null) {
//            foreach ($user->getGroups() as $groupid) {
//                change_group_user_assignments($groupid, null, $nickname);
//            }
        $this->db->deleteBy(["nickname", "=", $nickname]);
        //}
    }

    // Dump all users. Users come wrapped in User objects.
    function getAllUsers(): array
    {
        return array_map(fn($a): User => User::fromArray($this, $a), $this->db->findAll());
    }

    // Get all nicknames.
    function getAllNicknames(): array
    {
        $qb = $this->db->createQueryBuilder();
        return array_map(fn($c): string => $c["nickname"], $qb->select(["nickname"])->getQuery()->fetch());
    }

    // Sanitize nicknames. Clear non-existent nicknames from the array.
    function sanitizeNicknames(array $nicknames): array {
        $a = $this->db->findBy(["nickname", "IN", $nicknames]);
        return array_map(fn($a) => $a["nickname"], $a);
    }
}