/*
 * Copyright  2001-2004 The Apache Software Foundation
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package org.apache.tools.ant.taskdefs.optional.sitraka;

import java.io.File;
import java.io.IOException;
import java.util.Vector;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Execute;
import org.apache.tools.ant.taskdefs.LogStreamHandler;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.types.EnumeratedAttribute;
import org.apache.tools.ant.types.Path;
import org.w3c.dom.Document;


/**
 * Runs the JProbe Coverage 3.0 snapshot merge utility.
 *
 * @ant.task name="jpcovreport" category="metrics"
 */
public class CovReport extends CovBase {
    /*
      jpcoverport [options] -output=file -snapshot=snapshot.jpc
      jpcovreport [options] [-paramfile=file] -output=<fileName> -snapshot=<fileName>

      Generate a report based on the indicated snapshot

      -paramfile=file
      A text file containing the report generation options.

      -format=(html|text|xml) defaults to html
      The format of the generated report.

      -type=(executive|summary|detailed|verydetailed) defaults to detailed
      The type of report to be generated. For -format=xml,
      use -type=verydetailed to include source code lines.

      Note: A very detailed report can be VERY large.

      -percent=num            Min 1 Max 101 Default 101
      An integer representing a percentage of coverage.
      Only methods with test case coverage less than the
      percentage are included in reports.

      -filters=string
      A comma-separated list of filters in the form
      <package>.<class>:V, where V can be I for Include or
      E for Exclude. For the default package, omit <package>.

      -filters_method=string
      Optional. A comma-separated list of methods that
      correspond one-to-one with the entries in -filters.

      -output=string  Must be specified
      The absolute path and file name for the generated
      report file.

      -snapshot=string        Must be specified
      The absolute path and file name of the snapshot file.

      -inc_src_text=(on|off)  defaults to on
      Include text of the source code lines.
      Only applies for -format=xml and -type=verydetailed.

      -sourcepath=string      defaults to .
      A semicolon-separated list of source paths.

      /*

    /** format of generated report, optional */
    private String format = null;

    /** the name of the output snapshot, mandatory */
    private File tofile = null;

    /** type of report, optional */
    private String type = null;

    /** threshold value for printing methods, optional */
    private Integer percent = null;

    /** comma separated list of filters (???)*/
    private String filters = null;

    /** name of the snapshot file to create report from */
    private File snapshot = null;

    /** sourcepath to use */
    private Path sourcePath = null;

    /** include the text for each line of code (xml report verydetailed)*/
    private boolean includeSource = true;

    private Path coveragePath = null;

    /** */
    private Reference reference = null;


    public static class ReportFormat extends EnumeratedAttribute {
        public String[] getValues() {
            return new String[]{"html", "text", "xml"};
        }
    }

    /**
     * set the format of the report: "html", "text", or "xml"
     */
    public void setFormat(ReportFormat value) {
        this.format = value.getValue();
    }

    public static class ReportType extends EnumeratedAttribute {
        public String[] getValues() {
            return new String[]{"executive", "summary", "detailed", "verydetailed"};
        }
    }

    /**
     * The type of report to be generated: "executive", "summary",
     * "detailed" or "verydetailed".
     */
    public void setType(ReportType value) {
        this.type = value.getValue();
    }

    /**
     * If true, include text of the source code lines.
     * Only applies to format="xml" and type="verydetailed"
     */
    public void setIncludesource(boolean value) {
        this.includeSource = value;
    }

    /**
     * A numeric value for the threshold for printing methods.
     * Must be between 0 and 100.
     */
    public void setPercent(Integer value) {
        this.percent = value;
    }

    /**
     * set the filters
     * @ant.attribute ignore="true"
     */
    public void setFilters(String values) {
        this.filters = values;
    }

    /**
     * Adds a path to source files.
     */
    public Path createSourcepath() {
        if (sourcePath == null) {
            sourcePath = new Path(getProject());
        }
        return sourcePath.createPath();
    }

    /**
     * The name of the snapshot file that is the source to the report.
     */
    public void setSnapshot(File value) {
        this.snapshot = value;
    }

    /**
     * The name of the generated output file.
     */
    public void setTofile(File value) {
        this.tofile = value;
    }

    /**
     * @todo needs to be removed
     * @ant.element ignore="true"
     */
    public Path createCoveragepath() {
        if (coveragePath == null) {
            coveragePath = new Path(getProject());
        }
        return coveragePath.createPath();
    }

    /**
     * Adds a set of classes whose coverage information will be
     * checked against.
     */
    public Reference createReference() {
        if (reference == null) {
            reference = new Reference();
        }
        return reference;
    }


    public CovReport() {
    }

    /** check for mandatory options */
    protected void checkOptions() throws BuildException {
        if (tofile == null) {
            throw new BuildException("'tofile' attribute must be set.");
        }
        if (snapshot == null) {
            throw new BuildException("'snapshot' attribute must be set.");
        }
        if (getHome() == null) {
            throw new BuildException("'home' attribute must be set to JProbe home directory");
        }
        File jar = findCoverageJar();
        if (!jar.exists()) {
            throw new BuildException("Cannot find Coverage directory: " + getHome());
        }
        if (reference != null && !"xml".equals(format)) {
            log("Ignored reference. It cannot be used in non XML report.");
            reference = null; // nullify it so that there is no ambiguity
        }

    }

    public void execute() throws BuildException {
        checkOptions();
        try {
            Commandline cmdl = new Commandline();
            // we need to run Coverage from his directory due to dll/jar issues
            cmdl.setExecutable(findExecutable("jpcovreport"));
            String[] params = getParameters();
            for (int i = 0; i < params.length; i++) {
                cmdl.createArgument().setValue(params[i]);
            }

            // use the custom handler for stdin issues
            LogStreamHandler handler
                = new LogStreamHandler(this, Project.MSG_INFO, Project.MSG_WARN);
            Execute exec = new Execute(handler);
            log(cmdl.describeCommand(), Project.MSG_VERBOSE);
            exec.setCommandline(cmdl.getCommandline());
            int exitValue = exec.execute();
            if (Execute.isFailure(exitValue)) {
                throw new BuildException("JProbe Coverage Report failed ("
                    + exitValue + ")");
            }
            log("coveragePath: " + coveragePath, Project.MSG_VERBOSE);
            log("format: " + format, Project.MSG_VERBOSE);
            if (reference != null && "xml".equals(format)) {
                reference.createEnhancedXMLReport();
            }

        } catch (IOException e) {
            throw new BuildException("Failed to execute JProbe Coverage Report.", e);
        }
    }


    protected String[] getParameters() {
        Vector v = new Vector();
        if (format != null) {
            v.addElement("-format=" + format);
        }
        if (type != null) {
            v.addElement("-type=" + type);
        }
        if (percent != null) {
            v.addElement("-percent=" + percent);
        }
        if (filters != null) {
            v.addElement("-filters=" + filters);
        }
        v.addElement("-output=" + getProject().resolveFile(tofile.getPath()));
        v.addElement("-snapshot=" + getProject().resolveFile(snapshot.getPath()));
        // as a default -sourcepath use . in JProbe, so use project .
        if (sourcePath == null) {
            sourcePath = new Path(getProject());
            sourcePath.createPath().setLocation(getProject().resolveFile("."));
        }
        v.addElement("-sourcepath=" + sourcePath);

        if ("verydetailed".equalsIgnoreCase(format) && "xml".equalsIgnoreCase(type)) {
            v.addElement("-inc_src_text=" + (includeSource ? "on" : "off"));
        }

        String[] params = new String[v.size()];
        v.copyInto(params);
        return params;
    }


    public class Reference {
        protected Path classPath;
        protected ReportFilters filters;

        public Path createClasspath() {
            if (classPath == null) {
                classPath = new Path(CovReport.this.getProject());
            }
            return classPath.createPath();
        }

        public ReportFilters createFilters() {
            if (filters == null) {
                filters = new ReportFilters();
            }
            return filters;
        }

        protected void createEnhancedXMLReport() throws BuildException {
            // we need a classpath element
            if (classPath == null) {
                throw new BuildException("Need a 'classpath' element.");
            }
            // and a valid one...
            String[] paths = classPath.list();
            if (paths.length == 0) {
                throw new BuildException("Coverage path is invalid. It does not contain any existing path.");
            }
            // and we need at least one filter include/exclude.
            if (filters == null || filters.size() == 0) {
                createFilters();
                log("Adding default include filter to *.*()", Project.MSG_VERBOSE);
                ReportFilters.Include include = new ReportFilters.Include();
                filters.addInclude(include);
            }
            try {
                log("Creating enhanced XML report", Project.MSG_VERBOSE);
                XMLReport report = new XMLReport(CovReport.this, tofile);
                report.setReportFilters(filters);
                report.setJProbehome(new File(getHome().getParent()));
                Document doc = report.createDocument(paths);
                TransformerFactory tfactory = TransformerFactory.newInstance();
                Transformer transformer = tfactory.newTransformer();
                transformer.setOutputProperty(OutputKeys.INDENT, "yes");
                transformer.setOutputProperty(OutputKeys.METHOD, "xml");
                Source src = new DOMSource(doc);
                Result res = new StreamResult("file:///" + tofile.toString());
                transformer.transform(src, res);
            } catch (Exception e) {
                throw new BuildException("Error while performing enhanced XML "
                    + "report from file " + tofile, e);
            }
        }
    }
}