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/**
 * Copyright (c) 2021, RTE (http://www.rte-france.com)
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 * SPDX-License-Identifier: MPL-2.0
 */
package com.powsybl.openloadflow.sa;

import com.google.auto.service.AutoService;
import com.powsybl.commons.config.PlatformConfig;
import com.powsybl.commons.extensions.Extension;
import com.powsybl.commons.extensions.ExtensionJsonSerializer;
import com.powsybl.contingency.ContingenciesProvider;
import com.powsybl.iidm.network.Network;
import com.powsybl.loadflow.LoadFlowParameters;
import com.powsybl.math.matrix.MatrixFactory;
import com.powsybl.math.matrix.SparseMatrixFactory;
import com.powsybl.openloadflow.OpenLoadFlowParameters;
import com.powsybl.openloadflow.graph.EvenShiloachGraphDecrementalConnectivityFactory;
import com.powsybl.openloadflow.graph.GraphConnectivityFactory;
import com.powsybl.openloadflow.graph.NaiveGraphConnectivityFactory;
import com.powsybl.openloadflow.network.LfBranch;
import com.powsybl.openloadflow.network.LfBus;
import com.powsybl.openloadflow.util.PowsyblOpenLoadFlowVersion;
import com.powsybl.openloadflow.util.ProviderConstants;
import com.powsybl.security.SecurityAnalysisParameters;
import com.powsybl.security.SecurityAnalysisProvider;
import com.powsybl.security.SecurityAnalysisReport;
import com.powsybl.security.SecurityAnalysisRunParameters;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.concurrent.CompletableFuture;

/**
 * @author Florian Dupuy {@literal }
 */
@AutoService(SecurityAnalysisProvider.class)
public class OpenSecurityAnalysisProvider implements SecurityAnalysisProvider {

    private static final Logger LOGGER = LoggerFactory.getLogger(OpenSecurityAnalysisProvider.class);

    private final MatrixFactory matrixFactory;

    private final GraphConnectivityFactory connectivityFactory;

    public OpenSecurityAnalysisProvider(MatrixFactory matrixFactory, GraphConnectivityFactory connectivityFactory) {
        this.matrixFactory = matrixFactory;
        this.connectivityFactory = connectivityFactory;
    }

    public OpenSecurityAnalysisProvider() {
        this(new SparseMatrixFactory(), new EvenShiloachGraphDecrementalConnectivityFactory<>());
    }

    @Override
    public CompletableFuture run(Network network,
                                                         String workingVariantId,
                                                         ContingenciesProvider contingenciesProvider,
                                                         SecurityAnalysisRunParameters runParameters) {
        Objects.requireNonNull(network);
        Objects.requireNonNull(workingVariantId);
        Objects.requireNonNull(contingenciesProvider);
        Objects.requireNonNull(runParameters);

        LoadFlowParameters loadFlowParameters = runParameters.getSecurityAnalysisParameters().getLoadFlowParameters();
        OpenLoadFlowParameters loadFlowParametersExt = OpenLoadFlowParameters.get(loadFlowParameters);

        // FIXME implement a fast incremental connectivity algorithm
        GraphConnectivityFactory selectedConnectivityFactory;
        if (runParameters.getOperatorStrategies().isEmpty() && !loadFlowParametersExt.isSimulateAutomationSystems()) {
            selectedConnectivityFactory = connectivityFactory;
        } else {
            LOGGER.warn("Naive (and slow!!!) connectivity algorithm has been selected because at least one operator strategy is configured");
            selectedConnectivityFactory = new NaiveGraphConnectivityFactory<>(LfBus::getNum);
        }

        AbstractSecurityAnalysis securityAnalysis;
        if (loadFlowParameters.isDc()) {
            if (OpenSecurityAnalysisParameters.getOrDefault(runParameters.getSecurityAnalysisParameters()).isDcFastMode()) {
                securityAnalysis = new WoodburyDcSecurityAnalysis(network, matrixFactory, selectedConnectivityFactory, runParameters.getMonitors(), runParameters.getReportNode());
            } else {
                securityAnalysis = new DcSecurityAnalysis(network, matrixFactory, selectedConnectivityFactory, runParameters.getMonitors(), runParameters.getReportNode());
            }
        } else {
            securityAnalysis = new AcSecurityAnalysis(network, matrixFactory, selectedConnectivityFactory, runParameters.getMonitors(), runParameters.getReportNode());
        }

        return securityAnalysis.run(workingVariantId, runParameters.getSecurityAnalysisParameters(), contingenciesProvider,
                runParameters.getComputationManager(), runParameters.getOperatorStrategies(), runParameters.getActions(), runParameters.getLimitReductions());
    }

    @Override
    public String getName() {
        return ProviderConstants.NAME;
    }

    @Override
    public String getVersion() {
        return new PowsyblOpenLoadFlowVersion().toString();
    }

    @Override
    public Optional getLoadFlowProviderName() {
        return Optional.of(ProviderConstants.NAME);
    }

    @Override
    public Optional getSpecificParametersSerializer() {
        return Optional.of(new OpenSecurityAnalysisParameterJsonSerializer());
    }

    @Override
    public Optional> loadSpecificParameters(PlatformConfig platformConfig) {
        return Optional.of(OpenSecurityAnalysisParameters.load(platformConfig));
    }

    @Override
    public Optional> loadSpecificParameters(Map properties) {
        return Optional.of(OpenSecurityAnalysisParameters.load(properties));
    }

    @Override
    public List getSpecificParametersNames() {
        return OpenSecurityAnalysisParameters.SPECIFIC_PARAMETERS_NAMES;
    }

    @Override
    public void updateSpecificParameters(Extension extension, Map properties) {
        ((OpenSecurityAnalysisParameters) extension).update(properties);
    }
}




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