lab3_1

import java.io.*;
import java.util.HashSet;
import java.util.Scanner;

public class Main {

    static Scanner scConsole = new Scanner(System.in);

    private static PrintWriter getOutputFileLocation() {
        boolean isIncorrect;
        String location;
        PrintWriter file = null;
        do {
            isIncorrect = false;
            System.out.println("Enter file location:");
            location = scConsole.nextLine();
            try {
                file = new PrintWriter(location);
            } catch (FileNotFoundException e) {
                isIncorrect = true;
                System.out.println("File with this location is not found");
            }
        } while (isIncorrect);
        if (file != null)
            System.out.println("File opened successfully");
        return file;
    }

    private static Scanner getInputFileLocation() {
        boolean isIncorrect;
        String location;
        Scanner file = null;
        do {
            isIncorrect = false;
            System.out.println("Enter file location:");
            location = scConsole.nextLine();
            try {
                file = new Scanner(new File(location));
            } catch (FileNotFoundException e) {
                isIncorrect = true;
                System.out.println("File with this location is not found");
            }
        } while (isIncorrect);
        if (file != null)
            System.out.println("File opened successfully");
        return file;
    }

    public static String getLineFromFile() {
        String str = null;
        Scanner file = getInputFileLocation();
        boolean isIncorrect = false;
        do {
            try {
                str = file.nextLine();
            } catch (Exception e) {
                isIncorrect = true;
                System.out.println("Enter natural number");
            }
            if ((!isIncorrect) && (str.length() == 0)) {
                System.out.println("The line is empty");
                isIncorrect = true;
            }
        } while (isIncorrect);
        return str;
    }


    private static String getLineFromConsole() {
        String str = null;
        boolean isIncorrect;
        do {
            isIncorrect = false;
            try {
                str = scConsole.nextLine();
            } catch (Exception e) {
                System.out.println("Enter the number");
                isIncorrect = true;
            }
            if (str.length() == 0) {
                System.out.println("You entered an empty line!\nRepeat enter");
                isIncorrect = true;
            }
        } while (isIncorrect);
        return str;
    }

    private static void outputToFile(int wordPosition) {
        PrintWriter out = getOutputFileLocation();
        out.print(wordPosition);
        out.close();
    }

    private static int chooseInput() {
        boolean isIncorrect;
        String line;
        do {
            isIncorrect = false;
            System.out.println("Do you want to input from file? (y/n)");
            line = scConsole.nextLine().toLowerCase();
            if (!line.equals("y") && !line.equals("n") && !line.equals("")) {
                isIncorrect = true;
                System.out.println("Enter valid answer");
            }
        } while (isIncorrect);
        if (line.equals("y") || line.equals("")) {
            return 0;
        } else {
            return 1;
        }
    }

    private static int findAmountOfWords(String str) {
        int amount = 1;
        for (int i = 0; i < str.length(); i++) {
            if (str.charAt(i) == ' ') {
                amount++;
            }
        }
        return amount;
    }

    private static String[] findWords(String str, int amount) {
        int j = 0;
        String[] words = new String[amount];
        for (int i = 0; i < amount; i++) {
            words[i] = "";
            while ((j < str.length()) && (str.charAt(j) != ' ')) {
                words[i] = words[i] + str.charAt(j);
                j++;
            }
            j++;
        }
        return words;
    }

    private static int findShortestWord(int amount, String[] words) {
        int minLength = words[0].length();
        int pos = 0;
        for (int i = 0; i < amount; i++) {
            if (minLength > words[i].length()) {
                minLength = words[i].length();
                pos = i;
            }
        }
        return pos;
    }

    private static int findPos(String[] words, int pos){
        int wordPosition = 0;
        int i = 0;
        for (i = 0;i < pos; i++){
            wordPosition = wordPosition + words[i].length();
        }
        wordPosition = wordPosition + i;
        return wordPosition;
    }

    public static void main(String[] args) {
        String str;
        System.out.println("Программа находит самое короткое слово в предложении и указывает позицию , с которой оно начинается.");
        int chosenInput = chooseInput();
        System.out.println("Enter the string");
        if (chosenInput == 0) {
            str = getLineFromFile();
        } else {
            str = getLineFromConsole();
        }
        int amount = findAmountOfWords(str);
        String[] words = findWords(str, amount);
        int pos = findShortestWord(amount, words);
        int wordPosition = findPos(words,pos);
        System.out.println("Позиция самого короткого слова в предлоении: " + wordPosition);
        outputToFile(wordPosition);
    }
}