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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
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 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
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 * file and include the License file at packager/legal/LICENSE.txt.
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 */


package com.sun.enterprise.admin.cli.cluster;

import com.sun.enterprise.util.io.FileUtils;
import org.glassfish.api.Param;
import org.glassfish.api.admin.CommandException;
import org.glassfish.cluster.ssh.launcher.SSHLauncher;
import org.glassfish.cluster.ssh.sftp.SFTPClient;
import org.glassfish.cluster.ssh.util.SSHUtil;
import org.jvnet.hk2.annotations.Inject;
import org.jvnet.hk2.annotations.Scoped;
import org.jvnet.hk2.annotations.Service;
import org.jvnet.hk2.component.PerLookup;
import org.jvnet.hk2.component.Habitat;
import org.glassfish.internal.api.Globals;

import java.io.File;
import java.io.IOException;
import java.util.List;
import java.util.ArrayList;
import java.util.Set;

/**
 * @author Rajiv Mordani
 */


@Service(name = "uninstall-node")
@Scoped(PerLookup.class)
public class UninstallNodeCommand extends SSHCommandsBase {
    @Param(name="installdir", optional = true, defaultValue = "${com.sun.aas.productRoot}")
    private String installDir;

    @Param(optional = true, defaultValue = "false")
    private boolean force;
    
    @Inject
    private Habitat habitat;
    
    @Inject
    SSHLauncher sshLauncher;

    @Override
    protected void validate() throws CommandException {
        Globals.setDefaultHabitat(habitat);
        installDir = resolver.resolve(installDir);
        if (!force) {
            for (String host: hosts) {
                if(checkIfNodeExistsForHost(host, installDir)) {
                    throw new CommandException(Strings.get("call.delete.node.ssh", host));
                }
            }
        }       
        sshuser = resolver.resolve(sshuser);
        if (sshkeyfile == null) {
            //if user hasn't specified a key file check if key exists in
            //default location
            String existingKey = SSHUtil.getExistingKeyFile();
            if (existingKey == null) {
                promptPass=true;
            } else {
                sshkeyfile = existingKey;
            }
        } else {
            validateKeyFile(sshkeyfile);
        }
        
        //we need the key passphrase if key is encrypted
        if(sshkeyfile != null && isEncryptedKey()){
            sshkeypassphrase=getSSHPassphrase(true);
        }
        
    }

    @Override
    protected int executeCommand() throws CommandException {

        try {
            deleteFromHosts();
        } catch (IOException ioe) {
            throw new CommandException(ioe);
        }  catch (InterruptedException e) {
            throw new CommandException(e);
        }

        return SUCCESS;
    }

    private void deleteFromHosts() throws CommandException, IOException, InterruptedException {

        for (String host: hosts) {
            sshLauncher.init(sshuser, host, sshport, sshpassword, sshkeyfile, sshkeypassphrase, logger);

            if (sshkeyfile != null && !sshLauncher.checkConnection()) {
                //key auth failed, so use password auth
                promptPass=true;
            }
            
            if (promptPass) {                
                sshpassword=getSSHPassword(host);
                //re-initialize
                sshLauncher.init(sshuser, host, sshport, sshpassword, sshkeyfile, sshkeypassphrase, logger);
            }
            
            SFTPClient sftpClient = sshLauncher.getSFTPClient();


            if (!sftpClient.exists(installDir)) {
                throw new IOException (installDir + " Directory does not exist");
            }
            
            //File all = new File(resolver.resolve("${com.sun.aas.productRoot}"));
            String ins = resolver.resolve("${com.sun.aas.installRoot}") + "/../";

            File all = new File(ins);
            Set files = FileUtils.getAllFilesAndDirectoriesUnder(all);

            logger.finer("Total number of files under " + ins + " = " + files.size());
            String remoteDir = installDir;
            List modList = new ArrayList();
            if (!installDir.endsWith("/"))
                remoteDir = remoteDir + "/";

            for (Object f:files) {
                modList.add(remoteDir+FileUtils.makeForwardSlashes(((File)f).getPath()));
            }
            
            deleteRemoteFiles(sftpClient, modList, installDir, force);
            
            if(sftpClient.ls(installDir).isEmpty()) {
                sftpClient.rmdir(installDir);
            }
        }
    }
    
    private void validateKeyFile(String file) throws CommandException {
        File f = new File(file);
        if (!f.exists()) {
            throw new CommandException(Strings.get("KeyDoesNotExist", file));
        }
    }
}