// Miya Natsuhara
// 07-31-2019
// CSE142
// TA: Grace Hopper

// This program searches a text file containing information about the top 250 rated 
//   movies on IMDB for movies containing a particular word in the title, then
//   prints the results to an output file.

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

public class ImdbSearch {
   public static void main(String[] args) throws FileNotFoundException {
      Scanner input = new Scanner(new File("imdb.txt"));
      Scanner console = new Scanner(System.in);
      // NOTE: we did not add this functionality in class, but rather than printing the matched 
      //       lines to the console, here we are outputting them to a file named imdb_results.txt.  
      PrintStream output = new PrintStream(new File("imdb_results.txt"));
      
      System.out.print("search phrase? ");
      String searchPhrase = console.nextLine();
      
      String matchedLine = find(input, searchPhrase);          // post
      while (matchedLine.length() > 0) {
         output.println(highlight(matchedLine, searchPhrase)); // wire
         matchedLine = find(input, searchPhrase);              // post
      }
   }
   
   // Searches through the passed input file and returns the first line
   // that contains the given search phrase. 
   // Scanner input: input file to be searched through
   // String phrase: the phrase to be searched for in the input file
   public static String find(Scanner input, String phrase) {
      while (input.hasNextLine()) {
         String line = input.nextLine();
         // effectively checking "containsIgnoreCase"
         if (line.toLowerCase().contains(phrase.toLowerCase())) {
            return line;
         }
      }
      
      // no match is found
      return "";
   }
   
   // Highlights (in all caps and surrounded with **) the given search phrase in the 
   // given line and returns the result. 
   // String matchedLine: line of input to be highlighted
   // String searchPhrase: specific phrase to be highlighted inside the given line
   public static String highlight(String matchedLine, String searchPhrase) {
      Scanner lineScan = new Scanner(matchedLine);
      String result = "";
      while (lineScan.hasNext()) {
         String token = lineScan.next();
         if (token.equalsIgnoreCase(searchPhrase)) {
            // highlighting 
            result += "**" + token.toUpperCase() + "** ";
         } else {
            // leave it as it was
            result += token + " ";
         }
      }
      return result;
   }
}