class SpanLimitsBuilder

class SpanLimitsBuilder {
    
    /** @var ?int Maximum allowed attribute count per record */
    private ?int $attributeCountLimit = null;
    
    /** @var ?int Maximum allowed attribute value length */
    private ?int $attributeValueLengthLimit = null;
    
    /** @var ?int Maximum allowed span event count */
    private ?int $eventCountLimit = null;
    
    /** @var ?int Maximum allowed span link count */
    private ?int $linkCountLimit = null;
    
    /** @var ?int Maximum allowed attribute per span event count */
    private ?int $attributePerEventCountLimit = null;
    
    /** @var ?int Maximum allowed attribute per span link count */
    private ?int $attributePerLinkCountLimit = null;
    private bool $retainGeneralIdentityAttributes = false;
    
    /**
     * @param int $attributeCountLimit Maximum allowed attribute count per record
     */
    public function setAttributeCountLimit(int $attributeCountLimit) : SpanLimitsBuilder {
        $this->attributeCountLimit = $attributeCountLimit;
        return $this;
    }
    
    /**
     * @param int $attributeValueLengthLimit Maximum allowed attribute value length
     */
    public function setAttributeValueLengthLimit(int $attributeValueLengthLimit) : SpanLimitsBuilder {
        $this->attributeValueLengthLimit = $attributeValueLengthLimit;
        return $this;
    }
    
    /**
     * @param int $eventCountLimit Maximum allowed span event count
     */
    public function setEventCountLimit(int $eventCountLimit) : SpanLimitsBuilder {
        $this->eventCountLimit = $eventCountLimit;
        return $this;
    }
    
    /**
     * @param int $linkCountLimit Maximum allowed span link count
     */
    public function setLinkCountLimit(int $linkCountLimit) : SpanLimitsBuilder {
        $this->linkCountLimit = $linkCountLimit;
        return $this;
    }
    
    /**
     * @param int $attributePerEventCountLimit Maximum allowed attribute per span event count
     */
    public function setAttributePerEventCountLimit(int $attributePerEventCountLimit) : SpanLimitsBuilder {
        $this->attributePerEventCountLimit = $attributePerEventCountLimit;
        return $this;
    }
    
    /**
     * @param int $attributePerLinkCountLimit Maximum allowed attribute per span link count
     */
    public function setAttributePerLinkCountLimit(int $attributePerLinkCountLimit) : SpanLimitsBuilder {
        $this->attributePerLinkCountLimit = $attributePerLinkCountLimit;
        return $this;
    }
    
    /**
     * @param bool $retain whether general identity attributes should be retained
     *
     * @see https://github.com/open-telemetry/semantic-conventions/blob/main/docs/general/attributes.md#general-identity-attributes
     */
    public function retainGeneralIdentityAttributes(bool $retain = true) : SpanLimitsBuilder {
        $this->retainGeneralIdentityAttributes = $retain;
        return $this;
    }
    
    /**
     * @see https://github.com/open-telemetry/opentelemetry-specification/blob/main/specification/configuration/sdk-environment-variables.md#span-limits
     * @phan-suppress PhanDeprecatedClassConstant
     */
    public function build() : SpanLimits {
        $attributeCountLimit = $this->attributeCountLimit ?: Configuration::getInt(Env::OTEL_SPAN_ATTRIBUTE_COUNT_LIMIT, SpanLimits::DEFAULT_SPAN_ATTRIBUTE_COUNT_LIMIT);
        $attributeValueLengthLimit = $this->attributeValueLengthLimit ?: Configuration::getInt(Env::OTEL_SPAN_ATTRIBUTE_VALUE_LENGTH_LIMIT, SpanLimits::DEFAULT_SPAN_ATTRIBUTE_LENGTH_LIMIT);
        $eventCountLimit = $this->eventCountLimit ?: Configuration::getInt(Env::OTEL_SPAN_EVENT_COUNT_LIMIT, SpanLimits::DEFAULT_SPAN_EVENT_COUNT_LIMIT);
        $linkCountLimit = $this->linkCountLimit ?: Configuration::getInt(Env::OTEL_SPAN_LINK_COUNT_LIMIT, SpanLimits::DEFAULT_SPAN_LINK_COUNT_LIMIT);
        $attributePerEventCountLimit = $this->attributePerEventCountLimit ?: Configuration::getInt(Env::OTEL_EVENT_ATTRIBUTE_COUNT_LIMIT, SpanLimits::DEFAULT_EVENT_ATTRIBUTE_COUNT_LIMIT);
        $attributePerLinkCountLimit = $this->attributePerLinkCountLimit ?: Configuration::getInt(Env::OTEL_LINK_ATTRIBUTE_COUNT_LIMIT, SpanLimits::DEFAULT_LINK_ATTRIBUTE_COUNT_LIMIT);
        if ($attributeValueLengthLimit === PHP_INT_MAX) {
            $attributeValueLengthLimit = null;
        }
        $spanAttributesFactory = Attributes::factory($attributeCountLimit, $attributeValueLengthLimit);
        if (!$this->retainGeneralIdentityAttributes) {
            $spanAttributesFactory = new FilteredAttributesFactory($spanAttributesFactory, [
                TraceAttributes::USER_ID,
                TraceAttributes::USER_ROLES,
            ]);
        }
        return new SpanLimits($spanAttributesFactory, Attributes::factory($attributePerEventCountLimit, $attributeValueLengthLimit), Attributes::factory($attributePerLinkCountLimit, $attributeValueLengthLimit), $eventCountLimit, $linkCountLimit);
    }

}