package dip107;

import java.util.Scanner;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Comparator;

public class Ld5_02_181rdb232 {
	private static ArrayList<String> createLines(ArrayList<String> words) {
		ArrayList<String> result = new ArrayList<>();

		StringBuilder stringBuilder = new StringBuilder();
		for (String word : words) {
			stringBuilder.append(word).append(" ");
			if (word.length() != 0 && word.charAt(word.length() - 1) == '.') {
				result.add(stringBuilder.toString().trim());
				stringBuilder = new StringBuilder();
			}
		}

		return result;
	}

	private static ArrayList<String> getFileContents(String fileName) {
		try (BufferedReader reader = new BufferedReader(new FileReader(fileName))) {
			ArrayList<String> allWords = new ArrayList<>();
			String line;
			while ((line = reader.readLine()) != null) {
				String[] words = line.split("\\s+");

				for (String word : words)
					allWords.add(word);
			}

			return createLines(allWords);
		} catch (IOException ex) {
			System.out.println(ex.getMessage());
			return null;
		}
	}

	private static void modifyFileContents(ArrayList<String> lines) {
		String longestLine = lines.stream().max(Comparator.comparing(String::length)).get();

		for (int i = 0; i < lines.size(); i++) {
			String currentLine = lines.get(i);
			if (currentLine.compareTo(longestLine) != 0) {
				StringBuilder stringBuilder = new StringBuilder(currentLine);
				while (stringBuilder.length() != longestLine.length()) {
					stringBuilder.insert(0, " ");
				}

				lines.set(i, stringBuilder.toString());
			}
		}
	}

	private static void writeToFile(String fileName, ArrayList<String> lines) {
		System.out.println("result:");
		try (PrintWriter out = new PrintWriter(new FileWriter(fileName))) {
			for (int i=0;i<lines.size();i++) {
				out.println(lines.get(i));
				System.out.println(lines.get(i));
			}
		}
		catch (Exception ex) {
			System.out.println(ex.getMessage());
		}
	}

	public static void main(String[] args) {
		System.out.println("Niklāvs Māris Arbidāns 12 181RDB232");
		System.out.println("Roberts Jānis Gaigals 11 181RDB179");

		Scanner sc = new Scanner(System.in);
		System.out.print("input file name: ");
		String fileName = sc.nextLine();

		ArrayList<String> lines = getFileContents(fileName);
		if (lines != null) {
			modifyFileContents(lines);
			writeToFile(fileName, lines);
		}

		sc.close();
	}

}