package utilities;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

/**
 * Class to handle file management
 * 
 * @author Rukmal Fernando
 * @author Hardik Kotecha
 * @author Radhika Srinivasan
 */
public class FileManager
{
	private static FileManager reference;
	
	/**
	 * default constructor
	 */
	private FileManager()
	{
		reference = null;
	}
	
	/**
	 * Initialize a new XMLFileWriter if one does not exist
	 * @return InputReader
	 */
	public static FileManager initialize()
	{
		if ( reference == null )
			return new FileManager();
		else
			return reference;
	}
	
	/**
	 * was text pText successfully written to the File at pPath
	 * 
	 * @param pPath : String
	 * @param pText : String
	 * @return boolean
	 */
	public boolean writeToFile( String pPath, String pText )
	{
		try
		{
			boolean exists = ( new File( pPath ) ).exists();
	    
			if ( exists )
			{
				BufferedWriter out = new BufferedWriter( new FileWriter( pPath ) );
				out.write( pText );
				out.close();
			}
			
			return true;
		}
		catch ( IOException e )
		{
			e.printStackTrace();
			
			return false;
		}
	}
	
	/**
	 * create a file given a path and return success of operation
	 * 
	 * @param pPath : String
	 * @return boolean
	 */
	public boolean createFile( String pPath )
	{
		try
		{
			File givenFile = new File( pPath );
			givenFile.createNewFile();
			
			return true;
		}
		catch ( IOException e )
		{
			e.printStackTrace();
			
			return false;
		}
	}
	
	/**
	 * delete a file at the given path and return success of operation
	 * 
	 * @param pPath : String
	 * @return boolean
	 */
	public boolean deleteFile( String pPath )
	{
		File givenFile = new File( pPath );
		boolean deleted = false;
			
		if ( givenFile.exists() )
		{
			deleted = givenFile.delete();
				
			if ( !deleted )
				throw new RuntimeException( "failed to delete " + pPath );
		}
		
		return deleted;
	}
	
	/**
	 * does a file exist at this path?
	 * 
	 * @param pFilePath : String
	 * @return boolean
	 */
	public static boolean exists( String pFilePath )
	{
		boolean exists = ( new File( pFilePath ) ).exists();
			
		return ( exists );                       
	}
}