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package org.netbeans.modules.subversion.client.cli.commands;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import org.netbeans.modules.subversion.client.cli.SvnCommand;
import org.tigris.subversion.svnclientadapter.ISVNNotifyListener;
import org.tigris.subversion.svnclientadapter.SVNRevision;
import org.tigris.subversion.svnclientadapter.SVNUrl;

/**
 *
 * @author Tomas Stupka
 */
public class CatCommand extends SvnCommand {

    private enum CatType {
        url,
        file,
    }
    
    private final CatType type;
    
    private SVNUrl url;
    private File file;    
    private SVNRevision rev;
    private final SVNRevision pegRevision;
    
    private byte[] bytes;
    
    public CatCommand(SVNUrl url, SVNRevision rev, SVNRevision pegRevision) {
        this.url = url;                
        this.rev = rev;        
        this.file = null;
        this.pegRevision = pegRevision;
        type = CatType.url;

    }
    
    public CatCommand(File file, SVNRevision rev) {
        this.file = file;
        this.rev = rev;        
        this.url = null;
        this.pegRevision = null;
        type = CatType.file;
    }

    public InputStream getOutput() {
        return new ByteArrayInputStream(bytes == null ? new byte[] {} : bytes);
    }
    
    @Override
    protected boolean hasBinaryOutput() {
        return true;
    }

    @Override
    protected boolean notifyOutput() {
        return false;
    }    
    
    @Override
    public void output(byte[] bytes) {
        this.bytes = bytes;
    }
    
    @Override
    protected int getCommand() {
        return ISVNNotifyListener.Command.CAT;
    }
    
    @Override
    public void prepareCommand(Arguments arguments) throws IOException {        
        arguments.add("cat");        
        switch(type) {
            case url: 
                if (pegRevision == null) {
                    arguments.add(url);
                } else {
                    arguments.add(url, pegRevision);
                }
                break;
            case file:     
                arguments.add(file);
                setCommandWorkingDirectory(file);
                break;
            default :    
                throw new IllegalStateException("Illegal cattype: " + type);                             
        }                
        arguments.add(rev);
    }    
}
