<?php

namespace MingTsay\Akanyan;

use MingTsay\Akanyan\Discord\Me;

require_once __DIR__ . '/../env.php';

class Redis
{
  public const PREFIX = 'akanyan:discord:me:';
  public const TTL = 600; // 10 minutes
    protected static ?\Redis $redis = null;

    /**
     * @throws \RedisException
     */
    protected static function connect(): \Redis
    {
        if (static::$redis === null) {
            static::$redis = new \Redis();
            static::$redis->connect('127.0.0.1');
        }
        return static::$redis;
    }

    protected static function getKey(string $u): string
    {
        return static::PREFIX . md5($u);
    }

    public static function getCachedMe(string $u): ?Me
    {
        try {
            $redis = static::connect();
            return unserialize($redis->get(static::getKey($u))) ?: null;
        } catch (\RedisException $e) {
            trigger_error($e->getMessage());
            return null;
        }
    }

    public static function cacheMe(string $u, ?Me $me): ?Me
    {
        try {
            $redis = static::connect();
            $redis->setEx(static::getKey($u), static::TTL, serialize($me));
            return $me;
        } catch (\RedisException $e) {
            trigger_error($e->getMessage());
            return null;
        }
    }
}