package org.simantics.tests.modelled.utils;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.regex.Pattern;

import org.simantics.Simantics;
import org.simantics.databoard.Bindings;
import org.simantics.db.ReadGraph;
import org.simantics.db.Resource;
import org.simantics.db.common.request.ObjectsWithType;
import org.simantics.db.common.request.UniqueRead;
import org.simantics.db.exception.DatabaseException;
import org.simantics.layer0.Layer0;
import org.simantics.modeling.ModelingUtils;
import org.simantics.scl.compiler.commands.CommandSession;
import org.simantics.scl.compiler.module.Module;
import org.simantics.scl.compiler.module.coverage.CoverageUtils;
import org.simantics.scl.compiler.runtime.RuntimeModule;
import org.simantics.scl.runtime.tuple.Tuple0;
import org.simantics.tests.modelled.ontology.TestsResource;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class STSSuiteTestCollector {

    private static final Logger LOGGER = LoggerFactory.getLogger(STSSuiteTestCollector.class);
    
    /**
     * TODO: The idea of this class was to collect all the tests from shared libraries and construct
     * JUnit tests out of them programmatically and then run them with JUnit to get results
     * 
     */
    private static Collection<ModelledSTSSuite> collectTestsFromGraph() {
        try {
            Collection<ModelledSTSSuite> suitess = Simantics.getSession().syncRequest(new UniqueRead<Collection<ModelledSTSSuite>>() {

                @Override
                public Collection<ModelledSTSSuite> perform(ReadGraph graph) throws DatabaseException {
                    
                    List<Resource> sharedOntologies = Simantics.applySCL("Simantics/SharedOntologies", "getSharedOntologies", graph, Tuple0.INSTANCE);
                    if (LOGGER.isInfoEnabled())
                        LOGGER.info("Found {} shared ontologies from graph",  sharedOntologies.size());
                    Collection<ModelledSTSSuite> suites = new HashSet<>();
                    TestsResource TESTS = TestsResource.getInstance(graph);
                    Layer0 L0 = Layer0.getInstance(graph);
                    for (Resource sharedOntology : sharedOntologies) {
                        if (LOGGER.isInfoEnabled())
                            LOGGER.info("Searching {} for modelled tests", graph.getURI(sharedOntology));
                        List<Resource> stsSuites = ModelingUtils.searchByType(graph, sharedOntology, TESTS.STSSuite);
                        for (Resource stsSuite : stsSuites) {
                            try {
                                Collection<Resource> tests = graph.syncRequest(new ObjectsWithType(stsSuite, L0.ConsistsOf, TESTS.STSTest));
                                if (tests.isEmpty())
                                    continue;
    
                                List<ModelledSTSTest> testRunners = new ArrayList<>(tests.size());
                                for (Resource test : tests)
                                    testRunners.add(toModelledTest(graph, test));

                                suites.add(toModelledSuite(graph, stsSuite, testRunners));
                            } catch (Exception e) {
                                LOGGER.error("", e);
                            }
                        }
                    }
                    return suites;
                }
            });
            return suitess;
        } catch (DatabaseException e) {
            LOGGER.error("Could not find modelled tests", e);
            return Collections.emptyList();
        }
    }
    

    public static ModelledSTSTest toModelledTest(ReadGraph graph, Resource test) throws DatabaseException {
        TestsResource TESTS = TestsResource.getInstance(graph);
        String testName = graph.getRelatedValue(test, Layer0.getInstance(graph).HasName, Bindings.STRING);
        String code = graph.getRelatedValue(test, TESTS.STSTest_definition, Bindings.STRING);
        Integer priority = graph.getPossibleRelatedValue(test, TESTS.STSTest_executionPriority, Bindings.INTEGER);
        Boolean ignored = graph.getPossibleRelatedValue(test, TESTS.ignore, Bindings.BOOLEAN);
        return new ModelledSTSTest(testName, code, priority != null ? priority : -1, ignored != null ? ignored : false);
    }

    public static ModelledSTSSuite toModelledSuite(ReadGraph graph, Resource suite, List<ModelledSTSTest> children) throws DatabaseException {
        TestsResource TESTS = TestsResource.getInstance(graph);
        String suiteName = graph.getURI(suite);
        String moduleNameFilter = graph.getPossibleRelatedValue2(suite, TESTS.STSSuite_moduleNameFilter, Bindings.STRING);
        return new ModelledSTSSuite(suiteName, children, moduleNameFilter);
    }

    public static void setTestCoverage(ModelledSTSTest test, CommandSession session) {
        Collection<RuntimeModule> runtimeModules = session.getRuntimeEnvironment().getRuntimeModules();
        List<Module> modules = new ArrayList<>(runtimeModules.size());
        for (RuntimeModule module : runtimeModules)
            modules.add(module.getModule());
        test.setCoverage(CoverageUtils.getCoverage(modules));
        CoverageUtils.resetCoverage(modules);
    }
    
    public static List<ModelledSTSSuite> collectTests() {
        return new ArrayList<>(collectTestsFromGraph());
    }


    public static void setSuiteCoverage(ModelledSTSTest test, ModelledSTSSuite suite, CommandSession session) {
        Collection<RuntimeModule> runtimeModules = session.getRuntimeEnvironment().getRuntimeModules();
        List<Module> modules = new ArrayList<>(runtimeModules.size());
        for (RuntimeModule module : runtimeModules) {
            for (Pattern p : suite.getModuleNameFilterPatterns()) {
                if (p.matcher(module.getModule().getName().toLowerCase()).find()) {
                    modules.add(module.getModule());
                }
            }
        }
        test.setCoverage(CoverageUtils.getCoverage(modules));
        suite.addCoverage(modules);
        CoverageUtils.resetCoverage(modules);
    }
}