import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;

/**
 * This program searches a file to find every unique string that appears within parentheses
 * (on a single line) somewhere in the file. It is useful for finding bugs in the credits.
 * To use this program, extract credits.json from the Minecraft JAR and place it in the same
 * folder as this program. Then run this program. A file called output.txt will be created
 * that lists all of the unique strings that were found.
 * 
 * @author pine1needle
 */
public class CreditsSearcher {

	public static void main(String[] args) throws IOException {
		//find credits file and create scanner to read from it
		File credits = new File("credits.json");
		Scanner scnr = new Scanner(credits);
		//declare variables
		ArrayList<String> companyNames = new ArrayList<String>();
		String line = "";
		
		//search for unique company names
		while(scnr.hasNextLine()) {
			line = scnr.nextLine();
			//iterate over the line to see if and when parentheses start
			for (int i=0; i<line.length(); i++) {
				if (line.charAt(i) == '(') {
					int nameLength = 0;
					//iterate over the line to see if and when parentheses end
					for (int k=i+1; k<line.length(); k++) {
						nameLength++;
						if (line.charAt(k) == ')') {
							break;
						}
					}
					//extract the parenthetical text from the line
					String companyName = line.substring(i+1, i+nameLength);
					//if it's new, add it to our list of unique strings
					if (!companyNames.contains(companyName)) {
						companyNames.add(companyName);
					}
				}
			}
		}
		
		//prepare to write to file
		companyNames.sort(String.CASE_INSENSITIVE_ORDER);
		FileWriter fw = new FileWriter("output.txt");
		
		//print all unique names
		for (String s : companyNames) {
			//System.out.println(s);
			fw.write(s + "\n");
		}
		
		fw.close();
		scnr.close();
	}

}