package com.company;

import javafx.util.Pair;

import javax.swing.*;
import java.awt.*;
import java.io.File;
import java.util.*;

public class WindowApp extends JFrame {

    public static final int SCREEN_WIDTH=800;
    public static final int SCREEN_HEIGHT=500;
    JPanel mainPanel1;
    JPanel mainPanel2;
    JScrollPane scrollPane;
    JList countriesList;
    JTabbedPane tabbedPane;
    //data
    public static final String flagsFolderName="plain";
    public static final String capitalsFileName="capitals.txt";
    public static HashMap<String, ImageIcon> countriesAndFlagsMap;
    public static HashMap<String, String> countriesAndCapitalsMap;

    public static HashMap<String, Pair<String,ImageIcon>> countriesMap;

    WindowApp(){
        //data
        readData(flagsFolderName, capitalsFileName);
        //tabbed pane
        tabbedPane=new JTabbedPane();
        initFirstTab();
        initSecondTab();
        //window
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setResizable(false);
        setContentPane(tabbedPane);
        pack();
    }
    public void initFirstTab(){
        //main panel
        mainPanel1 =new JPanel();
        mainPanel1.setLayout(new BorderLayout());
        countriesList=new JList(countriesAndFlagsMap.keySet().toArray());
        countriesList.setCellRenderer(new FlagsListRenderer());
        //scroll pane
        scrollPane=new JScrollPane(countriesList);
        mainPanel1.add(scrollPane, BorderLayout.CENTER);
        scrollPane.setPreferredSize(new Dimension(SCREEN_WIDTH,SCREEN_HEIGHT));
        //
        tabbedPane.add(mainPanel1);
    }
    public void initSecondTab(){
        //main panel
        mainPanel2=new JPanel();
        mainPanel2.setLayout(new BorderLayout());
        //
        tabbedPane.add(mainPanel2);
    }
    public void readData(String flagsFolderName,String capitalsFileName){
        readFlags(flagsFolderName);
        readCapitals(capitalsFileName);
    }
    public void readCapitals(String capitalsFileName){
        countriesAndCapitalsMap=new HashMap<>();
        countriesAndCapitalsMap.put("Belarus ","Minsk");
        countriesAndCapitalsMap.put("Germany ","Berlin");
        countriesAndCapitalsMap.put("Netherlands ","Amsterdam");
//        try (Stream<String> stream = Files.lines(Paths.get(capitalsFileName))) {
//            stream.forEach((l)->{
//                int i=l.indexOf("--");
//                countriesAndCapitalsMap.put(l.substring(0,i)+" ",l.substring(i+2));
//            });
//        }
//        catch (IOException e){
//
//        }
    }
    public void readFlags(String folderName){
        File folder=new File(folderName);
        countriesAndFlagsMap =new HashMap<>();
        for(File file : folder.listFiles()){
            String countryName=file.getName();
            countryName=parseCountryName(countryName);
            countriesAndFlagsMap.put(countryName, createImageIcon(file.getPath(),countryName));
        }
    }
    protected ImageIcon createImageIcon(String path,
                                        String description) {
        java.net.URL imgURL = getClass().getResource(path);
        if (imgURL != null) {
            return new ImageIcon(imgURL, description);
        } else {
            System.err.println("Couldn't find file: " + path);
            return null;
        }
    }
    public String parseCountryName(String countryName){
        String countryNameParsed=countryName.substring(5,countryName.length()-4);
        StringBuffer contryNameBuffer=new StringBuffer();
        StringTokenizer tokenizer=new StringTokenizer(countryNameParsed,"_");
        String upperCaseString;
        while(tokenizer.hasMoreElements()){
            upperCaseString=tokenizer.nextElement().toString();
            upperCaseString=upperCaseString.substring(0,1).toUpperCase()+upperCaseString.substring(1);
            contryNameBuffer.append(upperCaseString);
            contryNameBuffer.append(" ");
        }
        return contryNameBuffer.toString();
    }
    public class FlagsListRenderer extends DefaultListCellRenderer {

        Font font = new Font("helvitica", Font.BOLD, 24);

        @Override
        public Component getListCellRendererComponent(
                JList list,
                Object value,
                int index,
                boolean isSelected,
                boolean cellHasFocus) {
            JLabel label = (JLabel) super.getListCellRendererComponent(
                    list,
                    value,
                    index,
                    isSelected,
                    cellHasFocus);
            if(isSelected) {
                String capitalName=countriesAndCapitalsMap.get((String) value);
                if(capitalName!=null) {
                    label.setText(value + capitalName);
                }else{
                    label.setText(value+" No data about capital");
                }
            }
            label.setIcon(countriesAndFlagsMap.get((String)value));
            label.setHorizontalTextPosition(JLabel.RIGHT);
            label.setFont(font);
            return label;
        }
    }
}