// This program is an example of file processing.
// It takes in a search string that we use to 
// to search through the files in a list of the
// top 250 movies on IMDB.
//
// If it finds the search string in the title of a 
// movie, it prints out some data to a file, in
// tab separated format.
//
// This is version will find all the lines
// in the input file that match the search string,
// not just the first.

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

public class Imdb3 {
   public static void main(String[] args) throws FileNotFoundException {
      Scanner console = new Scanner(System.in);
      Scanner input = new Scanner(new File("imdb.txt"));
      
      System.out.print("Type in a search string: ");
      String search = console.next();
      
      System.out.print("Type in an output filename: ");
      String outputFile = console.next();
      
      // creating a PrintStream creates the file if it doesn't
      // exist, or overwrites if it already existed
      PrintStream output = new PrintStream(new File(outputFile));
      
      // find the movie, print out the header line, and the 
      // line from the data file, to the output file
      String line = findMovie(input, search);
      if (line.length() > 0) {
         output.println("Rank\tVotes\tRating\tTitle");
    
         // We know we found one movie already, with the
         // given if test above. continue printing out lines
         // as long as findMovie keeps finding them.
         do {
            display(line, output);
            line = findMovie(input, search);
         } while (line.length() > 0);

      } else {
         // going to system.out and not the output file
         // because it's helpful info to the user, not helpful in the data file
         System.out.println("Movie not found");
      }
   }

   // returns the next line from the input that contains the given searchText,
   // or "" if no matching line was found. Note that this method
   // takes advantage of the Scanner's cursor position, even across
   // multiple successive calls to this method.
   public static String findMovie(Scanner input, String searchText) {
      while (input.hasNextLine()) {
         String line = input.nextLine();
         if (line.toLowerCase().contains(searchText.toLowerCase())) {
            return line;   
         }
      }
      return "";
   }

   // outputs a line from the Imdb file, separating the columns by tabs.   
   public static void display(String line, PrintStream output) {
      Scanner lineScan = new Scanner(line);
      int rank = lineScan.nextInt();
      int votes = lineScan.nextInt();
      double rating = lineScan.nextDouble();
      String title = lineScan.next();
      while (lineScan.hasNext()) {
         title += " " + lineScan.next();
      }
      output.println(rank + "\t" + votes + "\t" + rating + "\t" + title);
   }
}