import java.io.InputStream;
import java.io.OutputStream;
import java.io.IOException;


public class FileTrans {
  private String head = "";
  private String hostname = "";
  private String FilePath = "";
  private String hdfsFilePath = "";
  private HDFSUtil hdfsutil = null;
  private FtpClient ftp;
  private HttpUtil http;

  public void setFilePath(String FilePath){
    this.FilePath = FilePath;
  }

  public String getFilePath(String FilePath){
    return this.FilePath;
  }

  public void sethdfsFilePath(String hdfsFilePath){
    this.hdfsFilePath = hdfsFilePath;
  }

  public String gethdfsFilePath(String hdfsFilePath){
    return this.hdfsFilePath;
  }

  public void setHostName(String hostname){
    this.hostname = hostname;
  }

  public String getHostName(){
    return this.hostname;
  }

  public void setHead(String head){
    this.head = head;
  }

  public String getHead(){
    return this.head;
  }

  public FileTrans(String head, String hostname, String filepath, String hdfsnode,String hdfsFilepath){
    this.head = head;
    this.hostname = hostname;
    this.FilePath = filepath;
    this.hdfsFilePath = hdfsFilepath;
    if (head.equals("ftp") && hostname != ""){
      this.ftp = new FtpClient(this.hostname);
    }
    if ((head.equals("http") || head .equals("https")) && hostname != ""){
      String httpurl = head + "://" + hostname + "/" + filepath;
      this.http = new HttpUtil(httpurl);
    }
    if (hdfsnode != ""){
      this.hdfsutil = new HDFSUtil(hdfsnode);
    }
    this.hdfsutil.setHdfsPath(this.hdfsFilePath);
    this.hdfsutil.setFilePath(hdfsutil.getHdfsNode()+hdfsutil.getHdfsPath());
    this.hdfsutil.setHadoopSite("./hadoop-site.xml");
    this.hdfsutil.setHadoopDefault("./hadoop-default.xml");
    this.hdfsutil.setConfigure(false);
  }

  public static void main(String[] args) throws IOException{
    String head = "";
    String hostname = "";
    String filepath = "";
    String hdfsfilepath = "";
    String hdfsnode = "";
    String localpath = "";
    InputStream inStream = null;
    int samplelines = 0;
    try{
      head = args[0];         //遠端服務器類型，http還是ftp
      hostname = args[1];       //遠端服務器hostname
      filepath = args[2];       //遠端文件路徑
      hdfsnode = args[3];       //hdfs的機器名，不帶hdfs開頭
      hdfsfilepath = args[4];     //hdfs的文件路徑
      localpath = args[5];       //如果需要在本地保存一份的話，輸入本地的路徑，不保存，傳入空格或者samplelines傳入0
      samplelines = Integer.parseInt(args[6]); //保存在本地的話，保存前N行，如果不保存，填0
    }catch (Exception e){
      System.out.println("[FileTrans]:input args error!");
      e.printStackTrace();
    }
    FileTrans filetrans = new FileTrans(head, hostname, filepath, hdfsnode,hdfsfilepath);
    if (filetrans == null){
      System.out.println("filetrans null");
      return;
    }
    if (filetrans.ftp == null && head.equals("ftp")){
      System.out.println("filetrans ftp null");
      return;
    }
    if (filetrans.http == null && (head.equals("http") || head.equals("https"))){
      System.out.println("filetrans ftp null");
      return;
    }
    try{
      if (head.equals("ftp")){
        inStream = filetrans.ftp.getStream(filepath);
        if (samplelines > 0){
          filetrans.ftp.writeStream(inStream, localpath, samplelines);
        }
      }
      else{
        inStream = filetrans.http.getStream(head + "://" + hostname + "/" + filepath);
        if (samplelines > 0){
          filetrans.http.downLoad(head + "://" + hostname + "/" + filepath, localpath, samplelines);
        }
      }
      filetrans.hdfsutil.upLoad(inStream, filetrans.hdfsutil.getFilePath()); 
      if (head == "ftp"){
        filetrans.ftp.disconnect();
      }
    }catch (IOException e){
      System.out.println("[FileTrans]: file trans failed!");
      e.printStackTrace();
    }
    System.out.println("[FileTrans]: file trans success!");
  }

}