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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.restapi.pricing;
import com.yahoo.collections.Pair;
import com.yahoo.component.annotation.Inject;
import com.yahoo.config.provision.ClusterResources;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.container.jdisc.ThreadedHttpRequestHandler;
import com.yahoo.restapi.ErrorResponse;
import com.yahoo.restapi.Path;
import com.yahoo.restapi.SlimeJsonResponse;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.Slime;
import com.yahoo.text.Text;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.api.integration.billing.Plan;
import com.yahoo.vespa.hosted.controller.api.integration.pricing.ApplicationResources;
import com.yahoo.vespa.hosted.controller.api.integration.pricing.PriceInformation;
import com.yahoo.vespa.hosted.controller.api.integration.pricing.Prices;
import com.yahoo.vespa.hosted.controller.api.integration.pricing.PricingInfo;
import com.yahoo.vespa.hosted.controller.restapi.ErrorResponses;
import com.yahoo.yolean.Exceptions;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Optional;
import java.util.logging.Logger;
import static com.yahoo.jdisc.http.HttpRequest.Method.GET;
import static com.yahoo.restapi.ErrorResponse.methodNotAllowed;
import static com.yahoo.vespa.hosted.controller.api.integration.pricing.PricingInfo.SupportLevel;
import static java.math.BigDecimal.ZERO;
import static java.nio.charset.StandardCharsets.UTF_8;
/**
* API for calculating price information
*
* @author hmusum
*/
@SuppressWarnings("unused") // Handler
public class PricingApiHandler extends ThreadedHttpRequestHandler {
private static final Logger log = Logger.getLogger(PricingApiHandler.class.getName());
private final Controller controller;
@Inject
public PricingApiHandler(Context parentCtx, Controller controller) {
super(parentCtx);
this.controller = controller;
}
@Override
public HttpResponse handle(HttpRequest request) {
if (request.getMethod() != GET)
return methodNotAllowed("Method '" + request.getMethod() + "' is not supported");
try {
return handleGET(request);
} catch (IllegalArgumentException e) {
return ErrorResponse.badRequest(Exceptions.toMessageString(e));
} catch (RuntimeException e) {
return ErrorResponses.logThrowing(request, log, e);
}
}
private HttpResponse handleGET(HttpRequest request) {
Path path = new Path(request.getUri());
if (path.matches("/pricing/v1/pricing")) return pricing(request);
return ErrorResponse.notFoundError(Text.format("No '%s' handler at '%s'", request.getMethod(),
request.getUri().getPath()));
}
private HttpResponse pricing(HttpRequest request) {
String rawQuery = request.getUri().getRawQuery();
var priceParameters = parseQuery(rawQuery);
Prices price = calculatePrice(priceParameters);
return response(price, priceParameters);
}
private Prices calculatePrice(PriceParameters priceParameters) {
var priceCalculator = controller.serviceRegistry().pricingController();
return priceCalculator.priceForApplications(priceParameters.appResources, priceParameters.pricingInfo, priceParameters.plan);
}
private PriceParameters parseQuery(String rawQuery) {
if (rawQuery == null) throw new IllegalArgumentException("No price information found in query");
List<String> elements = Arrays.stream(URLDecoder.decode(rawQuery, UTF_8).split("&")).toList();
return parseQuery(elements);
}
private PriceParameters parseQuery(List<String> elements) {
var supportLevel = SupportLevel.BASIC;
var enclave = false;
var committedSpend = ZERO;
var applicationName = "default";
var plan = controller.serviceRegistry().planRegistry().defaultPlan(); // fallback to default plan if not supplied
List<ApplicationResources> appResources = new ArrayList<>();
for (Pair<String, String> entry : keysAndValues(elements)) {
var value = entry.getSecond();
switch (entry.getFirst().toLowerCase()) {
case "committedspend" -> committedSpend = new BigDecimal(value);
case "planid" -> plan = plan(value).orElseThrow(() -> new IllegalArgumentException("Unknown plan id " + value));
case "supportlevel" -> supportLevel = SupportLevel.valueOf(value.toUpperCase());
case "application" -> appResources.add(applicationResources(value));
default -> throw new IllegalArgumentException("Unknown query parameter '" + entry.getFirst() + '\'');
}
}
PricingInfo pricingInfo = new PricingInfo(supportLevel, committedSpend);
return new PriceParameters(List.of(), pricingInfo, plan, appResources);
}
private ApplicationResources applicationResources(String appResourcesString) {
List<String> elements = List.of(appResourcesString.split(","));
var vcpu = ZERO;
var memoryGb = ZERO;
var diskGb = ZERO;
var gpuMemoryGb = ZERO;
var enclaveVcpu = ZERO;
var enclaveMemoryGb = ZERO;
var enclaveDiskGb = ZERO;
var enclaveGpuMemoryGb = ZERO;
for (var element : keysAndValues(elements)) {
var value = element.getSecond();
switch (element.getFirst().toLowerCase()) {
case "vcpu" -> vcpu = new BigDecimal(value);
case "memorygb" -> memoryGb = new BigDecimal(value);
case "diskgb" -> diskGb = new BigDecimal(value);
case "gpumemorygb" -> gpuMemoryGb = new BigDecimal(value);
case "enclavevcpu" -> enclaveVcpu = new BigDecimal(value);
case "enclavememorygb" -> enclaveMemoryGb = new BigDecimal(value);
case "enclavediskgb" -> enclaveDiskGb = new BigDecimal(value);
case "enclavegpumemorygb" -> enclaveGpuMemoryGb = new BigDecimal(value);
default -> throw new IllegalArgumentException("Unknown key '" + element.getFirst() + '\'');
}
}
return new ApplicationResources(vcpu, memoryGb, diskGb, gpuMemoryGb,
enclaveVcpu, enclaveMemoryGb, enclaveDiskGb, enclaveGpuMemoryGb);
}
private List<Pair<String, String>> keysAndValues(List<String> elements) {
return elements.stream().map(element -> {
var index = element.indexOf("=");
if (index <= 0 || index == element.length() - 1)
throw new IllegalArgumentException("Error in query parameter, expected '=' between key and value: '" + element + '\'');
return new Pair<>(element.substring(0, index), element.substring(index + 1));
})
.toList();
}
private Optional<Plan> plan(String element) {
return controller.serviceRegistry().planRegistry().plan(element);
}
private static SlimeJsonResponse response(Prices prices, PriceParameters priceParameters) {
var slime = new Slime();
Cursor cursor = slime.setObject();
var applicationsArray = cursor.setArray("applications");
applicationPrices(applicationsArray, prices.priceInformationApplications(), priceParameters);
var priceInfoArray = cursor.setArray("priceInfo");
addItem(priceInfoArray, "Enclave (minimum $10k per month)", prices.totalPriceInformation().enclaveDiscount());
addItem(priceInfoArray, "Committed spend", prices.totalPriceInformation().committedAmountDiscount());
setBigDecimal(cursor, "totalAmount", prices.totalPriceInformation().totalAmount());
return new SlimeJsonResponse(slime);
}
private static void applicationPrices(Cursor applicationPricesArray, List<PriceInformation> applicationPrices, PriceParameters priceParameters) {
applicationPrices.forEach(priceInformation -> {
var element = applicationPricesArray.addObject();
var array = element.setArray("priceInfo");
addItem(array, supportLevelDescription(priceParameters), priceInformation.listPriceWithSupport());
addItem(array, "Enclave", priceInformation.enclaveDiscount());
addItem(array, "Volume discount", priceInformation.volumeDiscount());
});
}
private static String supportLevelDescription(PriceParameters priceParameters) {
String supportLevel = priceParameters.pricingInfo.supportLevel().name();
return supportLevel.substring(0,1).toUpperCase() + supportLevel.substring(1).toLowerCase() + " support unit price";
}
private static void addItem(Cursor array, String name, BigDecimal amount) {
if (amount.compareTo(BigDecimal.ZERO) != 0) {
var o = array.addObject();
o.setString("description", name);
setBigDecimal(o, "amount", amount);
}
}
private static void setBigDecimal(Cursor cursor, String name, BigDecimal value) {
cursor.setString(name, value.setScale(2, RoundingMode.HALF_UP).toPlainString());
}
private record PriceParameters(List<ClusterResources> clusterResources, PricingInfo pricingInfo, Plan plan,
List<ApplicationResources> appResources) {
}
}
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