package hr.fer.oop.lab4.Zad2;

import java.io.*;
import java.nio.file.*;
import java.nio.file.FileVisitResult;
import java.nio.file.FileVisitor;
import java.nio.file.Files;
import java.nio.file.StandardOpenOption;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeSet;

public class LabByteReader implements FileVisitor{

    public static double billTotal = 0;
    public static double articlenm = 0;
    public static  double billNm = 0;
    protected HashMap<String, String> articles;

    public LabByteReader(){
        articles = new HashMap<String, String>();
    }

    public HashMap<String, String> getArticles() {
        return articles;
    }

    @Override
    public FileVisitResult preVisitDirectory(Object dir, BasicFileAttributes attrs) throws IOException {
        return FileVisitResult.CONTINUE;
    }

    @Override
    public FileVisitResult visitFile(Object file, BasicFileAttributes attrs) throws IOException {
        System.out.println("reading file :"+file.toString());
        if(file.toString().endsWith("txt")){
            Artikl a;
            BufferedReader br = new BufferedReader(new InputStreamReader(Files.newInputStream((Path) file, StandardOpenOption.READ)));
            while(true){
                String line = br.readLine();
                line.trim();
                if(line.startsWith("UKUPNO")){
                    String[] bla = line.split("\\s+");
                    billTotal += Double.parseDouble(bla[1]);
                    billNm++;
                    break;
                }
                else if(!line.isEmpty() && !line.startsWith("Racun br") && !line.startsWith("Kupac:") && !line.startsWith("---") && !line.endsWith("---") && !line.startsWith("Proizvod")){
                    String [] parts = line.split("\\s\\s\\s+");
                    String[] kol = parts[2].split(" ");
                    String values = parts[1].trim() +"  "+ kol[0].trim();
                    //System.out.println(kol[0].trim());
                    if(articles.containsKey(parts[0])){
                        String[] value  = articles.get(parts[0]).split("  ");
                        try {
                            int nmb = Integer.parseInt(value[value.length - 1]);
                            nmb += Integer.parseInt(kol[0]);
                            String smth = parts[1].trim()+String.valueOf(nmb);
                            articles.replace(parts[0], smth);
                        }
                        catch(Exception e){
                            continue;
                        }
                    }
                    else{
                        articles.put(parts[0], values);
                    }
                    articlenm++;
                }
            }
        }

        return FileVisitResult.CONTINUE;
    }

    @Override
    public FileVisitResult visitFileFailed(Object file, IOException exc) throws IOException {
        return FileVisitResult.CONTINUE;
    }

    @Override
    public FileVisitResult postVisitDirectory(Object dir, IOException exc) throws IOException {
        return FileVisitResult.CONTINUE;
    }
}