class WeekValidator

final class WeekValidator extends ConstraintValidator {
    public function validate(mixed $value, Constraint $constraint) : void {
        if (!$constraint instanceof Week) {
            throw new UnexpectedTypeException($constraint, Week::class);
        }
        if (null === $value) {
            return;
        }
        if (!\is_string($value) && !$value instanceof \Stringable) {
            throw new UnexpectedValueException($value, 'string');
        }
        if (!preg_match('/^\\d{4}-W(0[1-9]|[1-4][0-9]|5[0-3])$/D', $value)) {
            $this->context
                ->buildViolation($constraint->invalidFormatMessage)
                ->setCode(Week::INVALID_FORMAT_ERROR)
                ->addViolation();
            return;
        }
        [
            $year,
            $weekNumber,
        ] = \explode('-W', $value, 2);
        $weeksInYear = (int) \date('W', \mktime(0, 0, 0, 12, 28, $year));
        if ($weekNumber > $weeksInYear) {
            $this->context
                ->buildViolation($constraint->invalidWeekNumberMessage)
                ->setCode(Week::INVALID_WEEK_NUMBER_ERROR)
                ->setParameter('{{ value }}', $value)
                ->addViolation();
            return;
        }
        if ($constraint->min) {
            [
                $minYear,
                $minWeekNumber,
            ] = \explode('-W', $constraint->min, 2);
            if ($year < $minYear || $year === $minYear && $weekNumber < $minWeekNumber) {
                $this->context
                    ->buildViolation($constraint->tooLowMessage)
                    ->setCode(Week::TOO_LOW_ERROR)
                    ->setInvalidValue($value)
                    ->setParameter('{{ min }}', $constraint->min)
                    ->addViolation();
                return;
            }
        }
        if ($constraint->max) {
            [
                $maxYear,
                $maxWeekNumber,
            ] = \explode('-W', $constraint->max, 2);
            if ($year > $maxYear || $year === $maxYear && $weekNumber > $maxWeekNumber) {
                $this->context
                    ->buildViolation($constraint->tooHighMessage)
                    ->setCode(Week::TOO_HIGH_ERROR)
                    ->setInvalidValue($value)
                    ->setParameter('{{ max }}', $constraint->max)
                    ->addViolation();
            }
        }
    }

}