<?php

declare(strict_types=1);

namespace OpenTelemetry\SDK\Logs;

use OpenTelemetry\SDK\Common\Attribute\Attributes;
use OpenTelemetry\SDK\Common\Configuration\Configuration;
use OpenTelemetry\SDK\Common\Configuration\Variables;
use const PHP_INT_MAX;

class LogRecordLimitsBuilder
{
    /** @var ?int Maximum allowed attribute count per record */
    private ?int $attributeCountLimit = null;

    /** @var ?int Maximum allowed attribute value length */
    private ?int $attributeValueLengthLimit = null;

    /**
     * @param int $attributeCountLimit Maximum allowed attribute count per record
     */
    public function setAttributeCountLimit(int $attributeCountLimit): LogRecordLimitsBuilder
    {
        $this->attributeCountLimit = $attributeCountLimit;

        return $this;
    }

    /**
     * @param int $attributeValueLengthLimit Maximum allowed attribute value length
     */
    public function setAttributeValueLengthLimit(int $attributeValueLengthLimit): LogRecordLimitsBuilder
    {
        $this->attributeValueLengthLimit = $attributeValueLengthLimit;

        return $this;
    }

    /**
     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/configuration/sdk-environment-variables.md#attribute-limits
     */
    public function build(): LogRecordLimits
    {
        $attributeCountLimit = $this->attributeCountLimit
            ?: Configuration::getInt(Variables::OTEL_LOGRECORD_ATTRIBUTE_COUNT_LIMIT);
        $attributeValueLengthLimit = $this->attributeValueLengthLimit
            ?: Configuration::getInt(Variables::OTEL_LOGRECORD_ATTRIBUTE_VALUE_LENGTH_LIMIT);

        if ($attributeValueLengthLimit === PHP_INT_MAX) {
            $attributeValueLengthLimit = null;
        }

        $attributesFactory = Attributes::factory($attributeCountLimit, $attributeValueLengthLimit);

        return new LogRecordLimits($attributesFactory);
    }
}