package ant.h2h.feelsafe;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FilenameFilter;
import java.io.InputStream;
import java.util.ArrayList;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.TextView;
import android.widget.Toast;

public class FileExploreActivity extends Activity {

    // Stores names of traversed directories
    ArrayList<String> str = new ArrayList<String>();

    // Check if the first level of the directory structure is the one showing
    private Boolean firstLvl = true;

    private static final String TAG = "F_PATH";

    private Item[] fileList;
    private File path = new File(Environment.getExternalStorageDirectory() + "");
    private String chosenFile;
    private static final int DIALOG_LOAD_FILE = 1000;

    ListAdapter adapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        loadFileList();

        showDialog(DIALOG_LOAD_FILE);
        Log.d(TAG, path.getAbsolutePath());

    }

    private void loadFileList() {
        try {
            path.mkdirs();
        } catch (SecurityException e) {
            Log.e(TAG, "unable to write on the sd card ");
        }

        // Checks whether path exists
        if (path.exists()) {
            FilenameFilter filter = new FilenameFilter() {
                @Override
                public boolean accept(File dir, String filename) {
                    File sel = new File(dir, filename);
                    // Filters based on whether the file is hidden or not
                    return (sel.isFile() || sel.isDirectory())
                            && !sel.isHidden();

                }
            };

            String[] fList = path.list(filter);
            fileList = new Item[fList.length];
            for (int i = 0; i < fList.length; i++) {
                fileList[i] = new Item(fList[i], getResources().getDrawable(R.drawable.file_icon));

                // Convert into file path
                File sel = new File(path, fList[i]);

                // Set drawables
                if (sel.isDirectory()) {
                    fileList[i].icon = getResources().getDrawable(R.drawable.directory_icon);
                    Log.d("DIRECTORY", fileList[i].file);
                } else {
                    //get file extension
                    String ext = getFileExtension(fileList[i].file);
                    if((ext.equals("jpg")||ext.equals("png"))){
                        String image = path+"/"+fileList[i].file;
                        InputStream is;
                        try {
                            is = new FileInputStream(image);
                            BitmapFactory.Options options=new BitmapFactory.Options();
                            options.inSampleSize = 8;
                            Bitmap preview_bitmap=BitmapFactory.decodeStream(is,null,options);

                            fileList[i].icon = new BitmapDrawable(getResources(),preview_bitmap);
                        } catch (FileNotFoundException e) {
                            e.printStackTrace();
                        }

                    }
                    Log.d("FILE", fileList[i].file);
                }
            }

            if (!firstLvl) {
                Item temp[] = new Item[fileList.length + 1];
                for (int i = 0; i < fileList.length; i++) {
                    temp[i + 1] = fileList[i];
                }
                temp[0] = new Item("Up", getResources().getDrawable(R.drawable.directory_up));
                fileList = temp;
            }
        } else {
            Log.e(TAG, "path does not exist");
        }

        adapter = new ArrayAdapter<Item>(this,
                android.R.layout.select_dialog_item, android.R.id.text1,
                fileList) {
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                // creates view
                View view = super.getView(position, convertView, parent);
                TextView textView = (TextView) view
                        .findViewById(android.R.id.text1);

                // put the image on the text view
                textView.setCompoundDrawablesWithIntrinsicBounds(
                        fileList[position].icon, null, null, null);

                // add margin between image and text (support various screen
                // densities)
                int dp5 = (int) (5 * getResources().getDisplayMetrics().density + 0.5f);
                textView.setCompoundDrawablePadding(dp5);

                return view;
            }
        };

    }

    private class Item {
        public String file;
        public Drawable icon;

        public Item(String file, Drawable drawable) {
            this.file = file;
            this.icon = drawable;
        }

        @Override
        public String toString() {
            return file;
        }
    }

    @Override
    protected Dialog onCreateDialog(int id) {
        Dialog dialog = null;
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);

        if (fileList == null) {
            Log.e(TAG, "No files loaded");
            dialog = builder.create();
            return dialog;
        }

        switch (id) {
        case DIALOG_LOAD_FILE:
            builder.setTitle("Choose your file");
            builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    chosenFile = fileList[which].file;
                    File sel = new File(path + "/" + chosenFile);
                    if (sel.isDirectory()) {
                        firstLvl = false;

                        // Adds chosen directory to list
                        str.add(chosenFile);
                        fileList = null;
                        path = new File(sel + "");

                        loadFileList();


                        //builder.setMessage(DIALOG_LOAD_FILE);
                        removeDialog(DIALOG_LOAD_FILE);
                        showDialog(DIALOG_LOAD_FILE);
                        Log.d(TAG, path.getAbsolutePath());

                    }

                    // Checks if 'up' was clicked
                    else if (chosenFile.equalsIgnoreCase("up") && !sel.exists()) {

                        // present directory removed from list
                        String s = str.remove(str.size() - 1);

                        // path modified to exclude present directory
                        path = new File(path.toString().substring(0,
                                path.toString().lastIndexOf(s)));
                        fileList = null;

                        // if there are no more directories in the list, then
                        // its the first level
                        if (str.isEmpty()) {
                            firstLvl = true;
                        }
                        loadFileList();

                        //builder.setMessage(DIALOG_LOAD_FILE);
                        removeDialog(DIALOG_LOAD_FILE);
                        showDialog(DIALOG_LOAD_FILE);
                        Log.d(TAG, path.getAbsolutePath());

                    }
                    // File picked
                    else {
                        // Perform action with file picked
                        if(getFileExtension(chosenFile).equals("jpg")||getFileExtension(chosenFile).equals("png")){
                            Log.d("FILE SEND", path+"/"+chosenFile);
                            Intent i=new Intent();
                            i.setAction("file");
                            i.putExtra("file",path+"/"+chosenFile);
                            sendBroadcast(i);

                        }
                        else{
                            Context context = getApplicationContext();
                            CharSequence text = getResources().getString(R.string.follow_register_wrong_img_format);
                            int duration = Toast.LENGTH_SHORT;

                            Toast toast = Toast.makeText(context, text, duration);
                            toast.show();
                        }
                        finish();
                    }

                }
            });
            break;
        }
        dialog = builder.show();
        return dialog;
    }

    public String getFileExtension(String fileName){
        String extension = "";

        int i = fileName.lastIndexOf('.');
        int p = Math.max(fileName.lastIndexOf('/'), fileName.lastIndexOf('\\'));

        if (i > p) {
            extension = fileName.substring(i+1);
        }
        return extension;
    }

}