/*
 * 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.ccm;


import java.io.File;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.DirectoryScanner;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.taskdefs.Execute;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.types.FileSet;


/**
 * Class common to all check commands (checkout, checkin,checkin default task);
 * @ant.task ignore="true"
 */
public class CCMCheck extends Continuus {

    private File file = null;
    private String comment = null;
    private String task = null;

    protected Vector filesets = new Vector();

    public CCMCheck() {
        super();
    }

    /**
     * Get the value of file.
     * @return value of file.
     */
    public File getFile() {
        return file;
    }

    /**
     * Sets the path to the file that the command will operate on.
     * @param v  Value to assign to file.
     */
    public void setFile(File v) {
        log("working file " + v, Project.MSG_VERBOSE);
        this.file = v;
    }

    /**
     * Get the value of comment.
     * @return value of comment.
     */
    public String getComment() {
        return comment;
    }

    /**
     * Specifies a comment.
     * @param v  Value to assign to comment.
     */
    public void setComment(String v) {
        this.comment = v;
    }


    /**
     * Get the value of task.
     * @return value of task.
     */
    public String getTask() {
        return task;
    }

    /**
     * Specifies the task number used to check
     * in the file (may use 'default').
     * @param v  Value to assign to task.
     */
    public void setTask(String v) {
        this.task = v;
    }


    /**
     * Adds a set of files to copy.
     */
    public void addFileset(FileSet set) {
        filesets.addElement(set);
    }


    /**
     * Executes the task.
     * <p>
     * Builds a command line to execute ccm and then calls Exec's run method
     * to execute the command line.
     * </p>
     */
    public void execute() throws BuildException {

        if (file == null && filesets.size() == 0) {
            throw new BuildException(
                "Specify at least one source - a file or a fileset.");
        }

        if (file != null && file.exists() && file.isDirectory()) {
            throw new BuildException("CCMCheck cannot be generated for directories");
        }

        if (file != null  && filesets.size() > 0) {
            throw new BuildException("Choose between file and fileset !");
        }

        if (getFile() != null) {
            doit();
            return;
        }

        int sizeofFileSet = filesets.size();
        for (int i = 0; i < sizeofFileSet; i++) {
            FileSet fs = (FileSet) filesets.elementAt(i);
            DirectoryScanner ds = fs.getDirectoryScanner(getProject());
            String[] srcFiles = ds.getIncludedFiles();
            for (int j = 0; j < srcFiles.length; j++) {
                File src = new File(fs.getDir(getProject()), srcFiles[j]);
                setFile(src);
                doit();
            }
        }
    }

    /**
     * check the file given by getFile().
     */
    private void doit() {
        Commandline commandLine = new Commandline();

        // build the command line from what we got the format is
        // ccm co /t .. files
        // as specified in the CCM.EXE help

        commandLine.setExecutable(getCcmCommand());
        commandLine.createArgument().setValue(getCcmAction());

        checkOptions(commandLine);

        int result = run(commandLine);
        if (Execute.isFailure(result)) {
            String msg = "Failed executing: " + commandLine.toString();
            throw new BuildException(msg, getLocation());
        }
    }


    /**
     * Check the command line options.
     */
    private void checkOptions(Commandline cmd) {
        if (getComment() != null) {
            cmd.createArgument().setValue(FLAG_COMMENT);
            cmd.createArgument().setValue(getComment());
        }

        if (getTask() != null) {
            cmd.createArgument().setValue(FLAG_TASK);
            cmd.createArgument().setValue(getTask());
        }

        if (getFile() != null) {
            cmd.createArgument().setValue(file.getAbsolutePath());
        }
    }

    /**
     * -comment flag -- comment to attach to the file
     */
    public static final String FLAG_COMMENT = "/comment";

    /**
     *  -task flag -- associate checkout task with task
     */
    public static final String FLAG_TASK = "/task";
}