<?php
declare(strict_types=1);

namespace Model;

use Controller\Sql;

class User
{
    public function __construct(
        public int $id,
        public string $name,
        public ?string $pwHash,
        public bool $isAdmin,
    ) {
    }

    public static function create(string $name, string $pwHash): ?self
    {
        $sql = Sql::connection();
        $stmt = $sql->prepare('INSERT INTO user (name, password) VALUES (?, ?)');
        try {
            $stmt->execute([$name, $pwHash]);
        } catch (\PDOException $e) {
            if ($e->getCode() == 23000) {
                // duplicate entry, so the username is already in use
                return null;
            } else {
                // unknown error, throw out
                throw $e;
            }
        }
        return new self((int) $sql->lastInsertId(), $name, $pwHash, false);
    }

    public static function byName(string $name): ?self
    {
        $sql = Sql::connection();
        $stmt = $sql->prepare('SELECT id, name, password, admin FROM user WHERE name = ?');
        $stmt->execute([$name]);
        if ($row = $stmt->fetch(\PDO::FETCH_ASSOC)) {
            return new self($row['id'], $row['name'], $row['password'], (bool) $row['admin']);
        }
        return null;
    }
}