package org.jboss.windup.rules.apps.java.reporting.rules;

import org.jboss.windup.config.AbstractRuleProvider;
import org.jboss.windup.config.GraphRewrite;
import org.jboss.windup.config.metadata.RuleMetadata;
import org.jboss.windup.config.operation.GraphOperation;
import org.jboss.windup.config.operation.Iteration;
import org.jboss.windup.config.operation.iteration.AbstractIterationOperation;
import org.jboss.windup.config.phase.ReportGenerationPhase;
import org.jboss.windup.config.query.Query;
import org.jboss.windup.graph.GraphContext;
import org.jboss.windup.graph.model.ProjectModel;
import org.jboss.windup.graph.model.WindupConfigurationModel;
import org.jboss.windup.graph.model.resource.FileModel;
import org.jboss.windup.graph.service.GraphService;
import org.jboss.windup.graph.service.WindupConfigurationService;
import org.jboss.windup.graph.traversal.ProjectModelTraversal;
import org.jboss.windup.reporting.model.TemplateType;
import org.jboss.windup.reporting.service.ReportService;
import org.jboss.windup.util.exception.WindupException;
import org.ocpsoft.rewrite.config.Configuration;
import org.ocpsoft.rewrite.config.ConfigurationBuilder;
import org.ocpsoft.rewrite.context.EvaluationContext;

import java.util.ArrayList;
import java.util.List;

/**
 * Creates the main report HTML page for a Java application.
 */
@RuleMetadata(phase = ReportGenerationPhase.class)
public class CreateUnparsableFilesReportRuleProvider extends AbstractRuleProvider
{
    public static final String REPORT_NAME = "Unparsable";
    public static final String TEMPLATE_UNPARSABLE = "/reports/templates/unparsable_files.ftl";
    public static final String DESCRIPTION = "This report shows all files that Windup could not parse in the expected format.\n" +
                "                        For instance, a file with a <code>.xml</code> or <code>.wsdl</code> suffix\n" +
                "                        is assumed to be an XML file. If the XML parser fails on it, you'll see that here.\n" +
                "                        Besides that, the information about parsing failure is also present wherever the individual file is listed.";

    // @formatter:off
    @Override
    public Configuration getConfiguration(GraphContext context)
    {
        // Create the ReportModel.
        GraphOperation createReportModel = new GraphOperation()
        {
            @Override
            public void perform(GraphRewrite event, EvaluationContext context)
            {
                WindupConfigurationModel windupConfiguration = WindupConfigurationService.getConfigurationModel(event.getGraphContext());
                for(FileModel fileModel : windupConfiguration.getInputPaths())
                {
                    ProjectModel application = fileModel.getProjectModel();
                    if (application == null)
                        throw new WindupException("Error, no project found in: " + fileModel.getFilePath());

                    createReportModel(event.getGraphContext(), application);
                }
            }

            public String toString() { return "addReport"; }
        };

        // For each FileModel...
        return ConfigurationBuilder.begin()
        .addRule()
        .perform(createReportModel);

    }
    // @formatter:on

    private List<ProjectModel> getProjectsWithUnparsableFiles(ProjectModelTraversal traversal)
    {
        List<ProjectModel> results = new ArrayList<>();
        for (FileModel fileModel : traversal.getCanonicalProject().getUnparsableFiles())
        {
            if (fileModel.getOnParseError() != FileModel.OnParseError.IGNORE)
            {
                results.add(traversal.getCanonicalProject());
                break;
            }
        }

        for (ProjectModelTraversal child : traversal.getChildren())
        {
            results.addAll(getProjectsWithUnparsableFiles(child));
        }
        return results;
    }

    private void createReportModel(GraphContext context, ProjectModel application)
    {
        ProjectModelTraversal traversal = new ProjectModelTraversal(application);
        List<ProjectModel> projects = getProjectsWithUnparsableFiles(traversal);

        if (projects.isEmpty())
            return;

        GraphService<UnparsablesAppReportModel> service = new GraphService<>(context, UnparsablesAppReportModel.class);
        UnparsablesAppReportModel reportModel = service.create();
        reportModel.setReportPriority(120);
        reportModel.setDisplayInApplicationReportIndex(true);
        reportModel.setReportName(REPORT_NAME);
        reportModel.setDescription(DESCRIPTION);
        reportModel.setReportIconClass("glyphicon glyphicon-warning-sign");
        reportModel.setMainApplicationReport(false);
        reportModel.setProjectModel(application);
        reportModel.setTemplatePath(TEMPLATE_UNPARSABLE);
        reportModel.setTemplateType(TemplateType.FREEMARKER);

        reportModel.setAllSubProjects(projects);

        // Set the filename for the report
        ReportService reportService = new ReportService(context);
        reportService.setUniqueFilename(reportModel, REPORT_NAME + "_" + application.getName(), "html");
    }
}
