package data;

/**
 * Angela Chen
 * Feb. 6, 2004
 *
 * This class writes various information to text file.
 *
 */

import java.io.*;
import java.util.*;

public class DataIO {

   /**
    * writeToFile writes the User's name and description.
    * -used for Project2
    */
   public synchronized static void writeToFile( User user, String fileName )
                                   throws IOException {
      PrintWriter out = new PrintWriter(
                        new FileWriter( fileName, true ) );

      out.println( "Name: " + user.getFirstName() + " " +
                   user.getLastName() );
      out.println( user.getDescription().trim() + "|" );

      out.close();
   }

   /**
    * writeCoordinates - used for testing purposes of passing parameters
    *    from director shockwave movie to jsp.
    * - used for Final Project
    */
   public synchronized static void writeCoordinates( String xCoord, String yCoord, String fileName )
                                   throws IOException {
      PrintWriter out = new PrintWriter(
                        new FileWriter( fileName, true ) );
      
      out.println( "(" + xCoord + ", " + yCoord + ")" );
      
      out.close();
   }

   /**
    * writeUTM - takes in x and y coordinates, converts them to UTM coordinates
    *    corresponding to maps of Del Mar, La Jolla, and Point Loma. Then
    *    writes them to the file specified in the parameter.
    * - used for Final Project
    */
   public synchronized static void writeUTM( String xCoord, String yCoord, String fileName)
                                   throws IOException {
      
      String easting, northing;
      int tempEast, tempNorth;
      
      // The minimum easting and northing coordinates for San Diego
      double minEasting = 476547;
      double minNorthing = 3609530;
      
      // Scale factors based on 800width x 450height director movie
      double xScale = 14.72;
      double yScale = 92.37;
    
    
      double x = Double.parseDouble( xCoord );
      double y = Double.parseDouble( yCoord );
      
      tempEast = (int) Math.round( (x * xScale) + minEasting );
      tempNorth = (int) Math.round( (y * yScale) + minNorthing );
      
      easting = Integer.toString( tempEast );
      northing = Integer.toString( tempNorth );
      
      PrintWriter out = new PrintWriter(
                        new FileWriter( fileName, true ) );
    
      out.println("Easting: " + easting);
      out.println("Northing: " + northing + "\n" );
    
      out.close();
   }
                                          
   /**
    * writeUserName - writes the user's first and last name to a file.
    * -used for final project.
    */
      
   public synchronized static void writeUserName( String firstName, String lastName, String fileName )
                                   throws IOException {
      
      PrintWriter out = new PrintWriter(
                        new FileWriter( fileName, true ) );
             
      out.println( "NAME: " + firstName + " " + lastName );
                
      out.close();
   }
      
   public static User getUserDescription( String firstName, String lastName,
                                          String fileName )throws IOException {
      BufferedReader in = new BufferedReader( new FileReader( fileName ) );
      User user = new User();
      String line = in.readLine();
      String description = "";
      String temp;
      StringTokenizer token = new StringTokenizer( line );
                                   
      while( line != null ) {
         temp = token.nextToken();
         if ( temp.equals("Name:") ){
             temp = token.nextToken();
             if ( temp.equalsIgnoreCase(firstName) ) {
                temp = token.nextToken();
                if ( temp.equalsIgnoreCase(lastName) ) {
                   line = in.readLine();
                   StringTokenizer t = new StringTokenizer( line, "|" );
                   description = t.nextToken();
                   user.setFirstName(firstName);
                   user.setLastName(lastName);
                   user.setDescription(description);
                }
             }
         }
         line = in.readLine();
      } //end while
      
      in.close();
      return user;
             
   } // end findDescription
      
}  // end DataIO