<?php

namespace App\Throttler;

use Illuminate\Cache\RateLimiter;

class Throttler
{
    /**
     * Target to rate limit.
     *
     * @var object
     */
    protected $target;

    /**
     * Rate Limiter instance.
     *
     * @var \Illuminate\Cache\RateLimiter
     */
    protected $limiter;

    /**
     * Maximum tries inside the decay window.
     *
     * @var int
     */
    protected $maxAttempts;

    /**
     * Window of seconds to make tries.
     *
     * @var int
     */
    protected $decaySeconds;

    /**
     * Create a new Throttler instance.
     *
     * @param  \Illuminate\Cache\RateLimiter  $limiter
     */
    public function __construct(RateLimiter $limiter)
    {
        $this->limiter = $limiter;
    }

    /**
     * Sets the limits to use with the Rate Limiter.
     *
     * @param  int  $tries
     * @param  int  $minutes
     * @return Throttler
     */
    public function throttle(int $tries, int $minutes)
    {
        $this->maxAttempts = $tries;
        $this->decaySeconds = $minutes * 60;

        return $this;
    }

    /**
     * Sets the target object to throttle its methods.
     *
     * @param  object  $target
     * @return $this
     */
    public function setTarget(object $target)
    {
        $this->target = $target;

        return $this;
    }

    /**
     * Handle dynamically calling the object.
     *
     * @param  string  $name
     * @param  mixed  $arguments
     * @return object
     */
    public function __call($name, $arguments)
    {
        $key = get_class($this->target)  . '|' . $name;
      
        if (! $this->limiter->tooManyAttempts($key, $this->maxAttempts)) {
            $this->target->{$name}(...$arguments);
            $this->limiter->hit($key, $this->decaySeconds);
        }

        return $this->target;
    }
}