<?php
namespace YTKNS;

final class Config {
    public const TYPE_ANY = '';
    public const TYPE_STR = 'string';
    public const TYPE_INT = 'integer';
    public const TYPE_BOOL = 'boolean';
    public const TYPE_ARR = 'array';

    public const DEFAULTS = [
        self::TYPE_ANY => null,
        self::TYPE_STR => '',
        self::TYPE_INT => 0,
        self::TYPE_BOOL => false,
        self::TYPE_ARR => [],
    ];

    private static array $config = [];

    public static function init(): void {
        $raw = DB::prepare('SELECT `config_key`, `config_value` FROM `ytkns_config`');
        $raw->execute();
        $raw = $raw->fetchAll();

        foreach($raw as $entry)
            self::$config[$entry['config_key']] = unserialize($entry['config_value']);
    }

    public static function get(string $key, string $type = self::TYPE_ANY, $default = null) {
        $value = self::$config[$key] ?? null;

        if($type !== self::TYPE_ANY && gettype($value) !== $type)
            $value = null;

        return $value ?? $default ?? self::DEFAULTS[$type];
    }

    public static function set(string $key, $value, bool $soft = false): void {
        self::$config[$key] = $value;

        if(!$soft) {
            $value = serialize($value);

            $save = DB::prepare('REPLACE INTO `ytkns_config` (`config_key`, `config_value`) VALUES (:key, :value)');
            $save->bindValue('key', $key);
            $save->bindValue('value', $value);
            $save->execute();
        }
    }

    public static function setDefault(string $key, $value, bool $soft = false): void {
        if($value !== null && self::get($key) === null)
            self::set($key, $value, $soft);
    }
}