package net.ukr.shyevhen;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class Book {
	private List<Character> book = new ArrayList<>();
	private File file;
	private List<Letter> alphabet = new ArrayList<>();

	public Book(String file) {
		super();
		this.file = new File(file);
		for (char i = 'A'; i <= 'Z'; i++) {
			alphabet.add(new Letter(i));
		}
	}

	public Book() {
		super();
		for (char i = 'A'; i <= 'Z'; i++) {
			alphabet.add(new Letter(i));
		}
	}

	public List<Letter> getAlphabet() {
		return alphabet;
	}

	public void setFile(File file) {
		this.file = file;
	}

	public void getLetterCount() {
		readFile();
		for (Letter letter : alphabet) {
			letter.setCount(book.lastIndexOf(letter.getLetter()) - book.indexOf(letter.getLetter()) + 1);
		}
		alphabet.sort((a, b) -> b.getCount() - a.getCount());
		System.out.println(this.toString());
	}

	private void readFile() {
		StringBuilder sb = new StringBuilder();
		try (BufferedReader br = new BufferedReader(new FileReader(file))) {
			String t = "";
			for (; (t = br.readLine()) != null;) {
				sb.append(t);
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
		String text = sb.toString().replaceAll("\\W|\\d", "").toUpperCase();
		for (int i = 0; i < text.length(); i++) {
			book.add(text.charAt(i));
		}
		book.sort((a, b) -> a - b);
	}

	@Override
	public String toString() {
		StringBuilder sb = new StringBuilder();
		for (Letter letter : alphabet) {
			sb.append(letter).append(System.lineSeparator());
		}
		return sb.toString();
	}

}