import java.util.*;
import java.text.*;
import java.io.*;
import java.nio.charset.StandardCharsets;

public class Week2{

    public static void main(String []args){
        /*String text = readUTF8File("English.txt");
        text = RNA(text);
        String[] testText = string2Array(text);
        arrayWrite("EngArrayOut.txt", testText);*/

        //writeUTF8File("EnglishOut.txt", nonalpha);
        bigramTest("blue");
    }

    public static String readUTF8File(String filePath){
        StringBuilder fileContent = new StringBuilder();
        try{
            Reader reader = new InputStreamReader(new FileInputStream(filePath), StandardCharsets.UTF_8);
            BufferedReader bufferedReader = new BufferedReader(reader);
            String s;
            while ((s = bufferedReader.readLine()) != null){
                fileContent.append(s + "\n");
            }
            bufferedReader.close();
            reader.close();
        } catch (Exception e){
            e.printStackTrace();
        }
        return fileContent.toString();
    }//End readUTF8File

    public static void writeUTF8File(String filePath, String content){
        try{
            Writer writer = new OutputStreamWriter(new FileOutputStream(filePath), StandardCharsets.UTF_8);
            PrintWriter printWriter = new PrintWriter(writer);
            writer.write(content);
            writer.close();
            printWriter.close();
        } catch (Exception e){
            e.printStackTrace();
        }
    }//End writeUTF8File

    public static String RNA(String content){ //RemoveNonAlphabeticals
        content = content.replaceAll("[^a-zA-Z ]", "");
        content = content.toLowerCase();
        return content;
    }//end RNA

    public static String[] string2Array(String toConvert){
        String[] newArray = toConvert.split(" ");
        return newArray;
    }

    //Just for testing
    public static void arrayWrite (String fileName, String[] content){
        try {
            Writer writer = new OutputStreamWriter(new FileOutputStream(fileName), StandardCharsets.UTF_8);
            PrintWriter printWriter = new PrintWriter(writer);
            for (int i = 0; i < content.length; i++){
                writer.write(content[i]+",");
            }
            writer.close();
            printWriter.close();
        } catch (Exception e){
            e.printStackTrace();
        }
    }
    public static void bigramTest(String word){
        String[] letters = word.split("");
        for(int i = 0; i < letters.length; i++){
            System.out.print(letters[i]);
            System.out.print(" ");
        }
        ArrayList<String> bigrams = new ArrayList<String>();
        for(int i = 0; i < letters.length; i++){
            int y = i+1;
            if(y <= i){
                String x = letters[i];
                x = x.concat(letters[y]);
                bigrams.add(x);
            }
        }
        String bigramList = Arrays.toString(bigrams.toArray());
        System.out.println(bigramList);
    }


}