<?php

declare(strict_types=1);

namespace App\Services\WorkingDays\Date;

use App\Services\WorkingDays\WorkingDayDeterminerInterface;

/**
 * Determines if a given date is a working day (Monday to Friday)
 */
class MonToFriWorkingDayDeterminer implements WorkingDayDeterminerInterface
{
    public function __construct()
    {
    }

    public function isWorkingDay(\DateTimeImmutable $date): bool
    {
        $weekday = $date->format('N');
        return $weekday <= 5; // Monday to Friday
    }

    public function getWorkingDaysCount(\DateTimeImmutable $startDate, int $workingDays): int
    {
        $period = new \DatePeriod($startDate, new \DateInterval('P1D'), $startDate->add(new \DateInterval(sprintf('P%dD', $workingDays))));
        $workingDaysCount = 0;

        foreach ($period as $date) {
            if ($this->isWorkingDay($date)) {
                $workingDaysCount++;
            }
        }

        return $workingDaysCount;
    }
}