<?php

namespace App\Services\Link;

use Illuminate\Support\Facades\Redis;

class RedisClickCounterStore implements ClickCounterStore
{
    public function increment(string $hash, string $field, int $by = 1): void
    {
        Redis::hincrby($hash, $field, $by);
    }

    public function put(string $hash, string $field, string $value): void
    {
        Redis::hset($hash, $field, $value);
    }

    /** @return array<string, string> */
    public function drain(string $hash): array
    {
        // MULTI/EXEC: the DEL cannot land between another client's HINCRBY and our
        // HGETALL, so no increment is read-then-discarded.
        $result = Redis::transaction(function ($tx) use ($hash) {
            $tx->hgetall($hash);
            $tx->del($hash);
        });

        return is_array($result[0] ?? null) ? $result[0] : [];
    }
}