import java.io.*;

public class CurlClient implements FilenameFilter {

	String searchPattern = "";
		
	public static void main(String args[]){
		//Syntax Check, returns usage of not correct
		if (args.length != 5){
			System.out.println("Usage:  java CurlClient <homespace> <directory containing files> <filepattern to upload> <fileType GNSS/GNSSV2/SLR/DORIS/VLBI/MISC> <fileContentType>");
			System.out.println("For file content type the following values are valid");
			System.out.println("\t'Data' , 'Products' , 'Misc'");
			System.out.println("");
			System.out.println("\tNo values are needed for VLBI");
						System.exit(0);
		}
		
		//Creates new instance of CurlClient with all the command line arguments being passed
		// args[0] = homespace (where cookie file should be located
		// args[1] = directory containing data files to be uploaded
		// args[2] = pattern all the file names contain.  Used to not upload extra files
		// args[3] = fileType (values can be GNSS/GNSSV2/DORIS/SLR/VLBI/MISC)
		// args[4] = data parameters (depends on type of data, see documentation)
		new CurlClient().runClient(args[0],args[1], args[2],args[3],args[4]);
	}	
	
	public void runClient(String cookieLocation, String fileDirectory, String searchPattern, String fileType, String fileContentType){
		try {
			this.searchPattern = searchPattern;
			
			//Defines the loginCmd, included location of cookiesFile 
			//May need to include full path to cURL if not found			
			String loginCmd = "curl -n -L -b " + cookieLocation + File.separator + ".urs_cookies -c " + cookieLocation + File.separator + ".urs_cookies http://cddis-basin.gsfc.nasa.gov/CDDIS_FileUpload/login";
            
            //Set the directory containing the upload files to the folder variable
			File folder = new File(fileDirectory);
            //Filter files in directory, store only those that match pattern in array
            String[] allFilesInThatFolder = folder.list(this);
            
            //Build the fileUpload options
            //Creates a StringBuffer object that will contain the file type specific options
            StringBuffer uploadOptions = new StringBuffer();
            
            uploadOptions.append(" -F \"fileType=" + fileType + "\"");
            uploadOptions.append(" -F \"fileContentType=" + fileContentType + "\"");
            
            //Begin building the upload command
            StringBuffer uploadCmd = new StringBuffer();
            
            //Begin building upload command
            uploadCmd.append("curl  -X POST -b " + cookieLocation + File.separator + ".urs_cookies -c " + cookieLocation + File.separator + ".urs_cookies  -n  ").append(uploadOptions);
            
            //Include all files that match in upload command
            for (int i=0;i<allFilesInThatFolder.length;i++){
            	uploadCmd.append(" -F \"file[]=@" + fileDirectory + allFilesInThatFolder[i] + "\"");
            }
            
            //Append the URL for the upload web service
            uploadCmd.append(" http://cddis-basin.gsfc.nasa.gov/CDDIS_FileUpload/upload/");
            
            //Creates file named cmd.txt in filedirectory containing the commands to login and upload files
            //This is needed to deal with some querks in how the Java exec command works and the special characters needed by the cURL command
                
            	PrintWriter writer = new PrintWriter(fileDirectory + File.separator + "cmd.txt", "UTF-8");
                   writer.println(loginCmd);
                   writer.println(uploadCmd.toString());
                   writer.close();
            
            //Executes the file and outputs the results to standard out
       	        Process p = Runtime.getRuntime().exec(fileDirectory + File.separator + "cmd.txt");
                BufferedReader in = new BufferedReader(new InputStreamReader(p.getInputStream()));
                String line = null;
                 while ((line = in.readLine()) != null) {
//                	 //The output cound be handled differently, this is the simplest
                     System.out.println(line);
                 }
            
        } catch (Exception e) {
            e.printStackTrace();
        }
	}

	
	//Method required to filter by file names
	@Override
	public boolean accept(File directory, String fileName) {
				if (fileName.contains(this.searchPattern)) return true;
		return false;
	}
	
	
}