package ua.nure.bekuzarov.Task5;

import java.io.File;
import java.io.IOException;
import java.util.Date;

public class JDir {

    private static boolean printInfo, addSeparator, lastTimeModify, printSize;
    private static final String r = "-r", f = "-f", d = "-d", s = "-s";

    public static void usage() {
        System.out.println("Usage: JDir [options] [FSE]");
    }

    public static void main(String[] args) throws IOException {
        if (args == null) {
            usage();
            return;
        }
        paramsParser(args);
        printInfo = false;
        addSeparator = false;
        lastTimeModify = false;
        printSize = false;
    }

    public static void printInfo(File file, String ext) {
        if (ext != null && file.isFile() && !file.getName().endsWith(ext))
            return;
        if (ext != null) {
            if (file.isFile())
                System.out.println(getInformation(file));
        } else {
            System.out.println(getInformation(file));
        }
        File[] files = file.listFiles();
        if (files == null)
            return;
        for (File f : files) {
            printInfo(f, ext);
        }
    }

    public static void printInfo(File file) {
        if (!printInfo && !addSeparator && !printSize && !lastTimeModify)
            printInfo = true;
        String name = file.getName();
        if (name.contains("*.")) {
            String canonical = file.getAbsolutePath();
            String[] s = canonical.split("\\*");
            printInfo(new File(s[0]), s[1]);
        } else
            printInfo(file, null);

    }

    private static void paramsParser(String[] args) throws IOException {
        boolean userDir = true;
        for (String arg : args) {
            if (checkSettings(arg))
                continue;
            userDir = false;
            printInfo(new File(arg));
        }
        if (userDir)
            printInfo(new File(System.getProperty("user.dir")));
    }

    public static boolean checkSettings(String option) {

        if (option == r) {
            printInfo = true;
            return true;
        }
        if (option == f) {
            addSeparator = true;
            return true;
        }
        if (option == d) {
            lastTimeModify = true;
            return true;
        }
        if (option == s) {
            printSize = true;
            return true;
        }
        return false;
    }

    private static String getInformation(File file) {
        StringBuilder sb = new StringBuilder();
        if (printInfo)
            sb.append(file.getAbsolutePath());
        if (addSeparator)
            if (!file.isFile())
                sb.append(file.getAbsolutePath() + File.separator);
        if (lastTimeModify)
            sb.append(" \nLast modification time: "
                    + (new Date(file.lastModified())));
        if (printSize)
            sb.append(" \nByte Size: " + file.length() + " bytes");
        sb.append(System.lineSeparator());
        return sb.toString();
    }

}