package data.read.implementation;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import objects.TreeNode;
import data.read.interfaces.ReadFileStrategyInterface;

public class X9Strategy implements ReadFileStrategyInterface
{
	
	private Pattern nodePattern = Pattern.compile("\\w+"); //Sablon za vadjenje odredjenih segmenata cvora
	private Matcher nodeMatch = null;
	
	@Override
	public Vector<?> readFile(String path)
	{
		BufferedReader ulazniFajl = null;
		Vector<TreeNode> sadrzajFajla = new Vector<TreeNode>();
		
		String buffer = null; 		//u buffer se smjesta ucitani red
		TreeNode cvor = null;		//podaci o corovima
		String[] tokens = null;
		
		try
		{
			ulazniFajl = new BufferedReader(new FileReader(path));
			
			ulazniFajl.readLine();		//preskakanje prva dva reda u fajlu
			ulazniFajl.readLine();		//preskakanje prva dva reda u fajlu
			
			
			while ((ulazniFajl) != null)
			{
				[b]buffer = ulazniFajl.readLine();
				String delimiter = "[;]";
				tokens = buffer.split(delimiter);
				
				if(tokens.matches("\\w+\\w+\\w+\\w+"))
				{
					nodeMatch = nodePattern.matcher(tokens);
					cvor = this.parsirajCvor(nodeMatch); [/b]
					sadrzajFajla.add(new TreeNode(cvor.getIndex(), cvor.getInfo(), cvor.getLeft(), cvor.getRight()));
				}
			}
			
		}

		catch (FileNotFoundException e)
		{
			System.out.println("Fajl nije pronadjen");
		}

		catch (IOException e)
		{
			e.printStackTrace();
		}

		finally
		{
			if (ulazniFajl != null)
			{
				try
				{
					ulazniFajl.close();
				} catch (IOException e)
				{
					e.printStackTrace();
				}
			}
		}

		return sadrzajFajla;
	}


	private TreeNode parsirajCvor(Matcher podaciCvora)
	{
		TreeNode privremeniCvor = new TreeNode(null, null, null, null);
		String podatak = null;
		
		for(int i = 1; i < 6; i++)
		{
			podaciCvora.find();
			podatak = podaciCvora.group();
			
			if(!podatak.equals("null"))
			{
				switch(i)
				{
				case 1:
					privremeniCvor.setIndex(Integer.parseInt(podatak));
					break;
				case 2:
					privremeniCvor.setInfo(podatak);
					break;
				case 3:
					privremeniCvor.setLeft(Integer.parseInt(podatak));
					break;
				case 4:
					privremeniCvor.setRight(Integer.parseInt(podatak));
					break;
				case 5:
					privremeniCvor.setPercent(Float.parseFloat(podatak));
					break;
				default:
					break;
				}
			}
		}
		
		return privremeniCvor;
	}
}