// SimpleFileDialog.java
package com.microcontrollerbg.usbirtoy;

/*
*
* This file is licensed under The Code Project Open License (CPOL) 1.02
* http://www.codeproject.com/info/cpol10.aspx
* http://www.codeproject.com/info/CPOL.zip
*
* License Preamble:
* This License governs Your use of the Work. This License is intended to allow developers to use the Source
* Code and Executable Files provided as part of the Work in any application in any form.
*
* The main points subject to the terms of the License are:
*    Source Code and Executable Files can be used in commercial applications;
*    Source Code and Executable Files can be redistributed; and
*    Source Code can be modified to create derivative works.
*    No claim of suitability, guarantee, or any warranty whatsoever is provided. The software is provided "as-is".
*    The Article(s) accompanying the Work may not be distributed or republished without the Author's consent
*
* This License is entered between You, the individual or other entity reading or otherwise making use of
* the Work licensed pursuant to this License and the individual or other entity which offers the Work
* under the terms of this License ("Author").
*  (See Links above for full license text)
*/

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
//import android.content.DialogInterface.OnKeyListener;
import android.os.Environment;
import android.text.Editable;
import android.view.Gravity;
//import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class SimpleFileDialog
{
	private int FileOpen     = 0;
	private int FileSave     = 1;
	private int FolderChoose = 2;
	private int Select_type = FileSave;
	private String m_sdcardDirectory = "";
	private Context m_context;
	private TextView m_titleView1;
	private TextView m_titleView;
	public String Default_File_Name = "default.txt";
	private String Selected_File_Name = Default_File_Name;
	private EditText input_text;

	private String m_dir = "";
	private List<String> m_subdirs = null;
	private SimpleFileDialogListener m_SimpleFileDialogListener = null;
	private ArrayAdapter<String> m_listAdapter = null;

	//////////////////////////////////////////////////////
	// Callback interface for selected directory
	//////////////////////////////////////////////////////
	public interface SimpleFileDialogListener
	{
		public void onChosenDir(String chosenDir);
	}

	public SimpleFileDialog(Context context, String file_select_type, SimpleFileDialogListener SimpleFileDialogListener)
	{
		if (file_select_type.equals("FileOpen"))          Select_type = FileOpen;
		else if (file_select_type.equals("FileSave"))     Select_type = FileSave;
		else if (file_select_type.equals("FolderChoose")) Select_type = FolderChoose;
		else Select_type = FileOpen;

		m_context = context;
		m_sdcardDirectory = Environment.getExternalStorageDirectory().getAbsolutePath();
		m_SimpleFileDialogListener = SimpleFileDialogListener;

		try
		{
			m_sdcardDirectory = new File(m_sdcardDirectory).getCanonicalPath();
		}
		catch (IOException ioe)
		{
		}
	}

	///////////////////////////////////////////////////////////////////////
	// chooseFile_or_Dir() - load directory chooser dialog for initial
	// default sdcard directory
	///////////////////////////////////////////////////////////////////////
	public void chooseFile_or_Dir()
	{
		// Initial directory is sdcard directory
		if (m_dir.equals(""))	chooseFile_or_Dir(m_sdcardDirectory);
		else chooseFile_or_Dir(m_dir);
	}

	////////////////////////////////////////////////////////////////////////////////
	// chooseFile_or_Dir(String dir) - load directory chooser dialog for initial
	// input 'dir' directory
	////////////////////////////////////////////////////////////////////////////////
	public void chooseFile_or_Dir(String dir)
	{
		File dirFile = new File(dir);
		if (! dirFile.exists() || ! dirFile.isDirectory())
		{
			dir = m_sdcardDirectory;
		}

		try
		{
			dir = new File(dir).getCanonicalPath();
		}
		catch (IOException ioe)
		{
			return;
		}

		m_dir = dir;
		m_subdirs = getDirectories(dir);

		class SimpleFileDialogOnClickListener implements DialogInterface.OnClickListener
		{
			public void onClick(DialogInterface dialog, int item)
			{
				String m_dir_old = m_dir;
				String sel = "" + ((AlertDialog) dialog).getListView().getAdapter().getItem(item);
				if (sel.charAt(sel.length()-1) == '/')	sel = sel.substring(0, sel.length()-1);

				// Navigate into the sub-directory
				if (sel.equals(".."))
				{
					   m_dir = m_dir.substring(0, m_dir.lastIndexOf("/"));
				}
				else
				{
					   m_dir += "/" + sel;
				}
				Selected_File_Name = Default_File_Name;

				if ((new File(m_dir).isFile())) // If the selection is a regular file
				{
					m_dir = m_dir_old;
					Selected_File_Name = sel;
				}

				updateDirectory();
			}
		}

		AlertDialog.Builder dialogBuilder = createDirectoryChooserDialog(dir, m_subdirs,
				new SimpleFileDialogOnClickListener());

		dialogBuilder.setPositiveButton("OK", new OnClickListener()
		{
			@Override
			public void onClick(DialogInterface dialog, int which)
			{
				// Current directory chosen
				// Call registered listener supplied with the chosen directory
				if (m_SimpleFileDialogListener != null){
					{
						if (Select_type == FileOpen || Select_type == FileSave)
						{
							Selected_File_Name= input_text.getText() +"";
							m_SimpleFileDialogListener.onChosenDir(m_dir + "/" + Selected_File_Name);}
						else
						{
							m_SimpleFileDialogListener.onChosenDir(m_dir);
						}
					}
				}
			}
		}).setNegativeButton("Cancel", null);

		final AlertDialog dirsDialog = dialogBuilder.create();

		// Show directory chooser dialog
		dirsDialog.show();
	}

	private boolean createSubDir(String newDir)
	{
		File newDirFile = new File(newDir);
		if   (! newDirFile.exists() ) return newDirFile.mkdir();
		else return false;
	}

	private List<String> getDirectories(String dir)
	{
		List<String> dirs = new ArrayList<String>();
		try
		{
			File dirFile = new File(dir);

			// if directory is not the base sd card directory add ".." for going up one directory
			if (! m_dir.equals(m_sdcardDirectory) ) dirs.add("..");

			if (! dirFile.exists() || ! dirFile.isDirectory())
			{
				return dirs;
			}

			for (File file : dirFile.listFiles())
			{
				if ( file.isDirectory())
				{
					// Add "/" to directory names to identify them in the list
					dirs.add( file.getName() + "/" );
				}
				else if (Select_type == FileSave || Select_type == FileOpen)
				{
					// Add file names to the list if we are doing a file save or file open operation
					dirs.add( file.getName() );
				}
			}
		}
		catch (Exception e)	{}

		Collections.sort(dirs, new Comparator<String>()
		{
			public int compare(String o1, String o2)
			{
				return o1.compareTo(o2);
			}
		});
		return dirs;
	}

	//////////////////////////////////////////////////////////////////////////////////////////////////////////
	//////                                   START DIALOG DEFINITION                                    //////
	//////////////////////////////////////////////////////////////////////////////////////////////////////////
	private AlertDialog.Builder createDirectoryChooserDialog(String title, List<String> listItems,
			DialogInterface.OnClickListener onClickListener)
	{
		AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(m_context);
		////////////////////////////////////////////////
		// Create title text showing file select type //
		////////////////////////////////////////////////
		m_titleView1 = new TextView(m_context);
		m_titleView1.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
		//m_titleView1.setTextAppearance(m_context, android.R.style.TextAppearance_Large);
		//m_titleView1.setTextColor( m_context.getResources().getColor(android.R.color.black) );

		if (Select_type == FileOpen    ) m_titleView1.setText("Open:");
		if (Select_type == FileSave    ) m_titleView1.setText("Save As:");
		if (Select_type == FolderChoose) m_titleView1.setText("Folder Select:");

		//need to make this a variable Save as, Open, Select Directory
		m_titleView1.setGravity(Gravity.CENTER_VERTICAL);
		m_titleView1.setBackgroundColor(-12303292); // dark gray 	-12303292
		m_titleView1.setTextColor( m_context.getResources().getColor(android.R.color.white) );

		// Create custom view for AlertDialog title
		LinearLayout titleLayout1 = new LinearLayout(m_context);
		titleLayout1.setOrientation(LinearLayout.VERTICAL);
		titleLayout1.addView(m_titleView1);


		if (Select_type == FolderChoose || Select_type == FileSave)
		{
			///////////////////////////////
			// Create New Folder Button  //
			///////////////////////////////
			Button newDirButton = new Button(m_context);
			newDirButton.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
			newDirButton.setText("New Folder");
			newDirButton.setOnClickListener(new View.OnClickListener()
			{
				@Override
				public void onClick(View v)
				{
					final EditText input = new EditText(m_context);

					// Show new folder name input dialog
					new AlertDialog.Builder(m_context).
					setTitle("New Folder Name").
					setView(input).setPositiveButton("OK", new DialogInterface.OnClickListener()
					{
						public void onClick(DialogInterface dialog, int whichButton)
						{
							Editable newDir = input.getText();
							String newDirName = newDir.toString();
							// Create new directory
							if ( createSubDir(m_dir + "/" + newDirName) )
							{
								// Navigate into the new directory
								m_dir += "/" + newDirName;
								updateDirectory();
							}
							else
							{
								Toast.makeText(	m_context, "Failed to create '"
										+ newDirName + "' folder", Toast.LENGTH_SHORT).show();
							}
						}
					}).setNegativeButton("Cancel", null).show();
				}
			}
					);
			titleLayout1.addView(newDirButton);
		}

		/////////////////////////////////////////////////////
		// Create View with folder path and entry text box //
		/////////////////////////////////////////////////////
		LinearLayout titleLayout = new LinearLayout(m_context);
		titleLayout.setOrientation(LinearLayout.VERTICAL);

		m_titleView = new TextView(m_context);
		m_titleView.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
		m_titleView.setBackgroundColor(-12303292); // dark gray -12303292
		m_titleView.setTextColor( m_context.getResources().getColor(android.R.color.white) );
		m_titleView.setGravity(Gravity.CENTER_VERTICAL);
		m_titleView.setText(title);

		titleLayout.addView(m_titleView);

		if (Select_type == FileOpen || Select_type == FileSave)
		{
			input_text = new EditText(m_context);
			input_text.setText(Default_File_Name);
			titleLayout.addView(input_text);
		}
		//////////////////////////////////////////
		// Set Views and Finish Dialog builder  //
		//////////////////////////////////////////
		dialogBuilder.setView(titleLayout);
		dialogBuilder.setCustomTitle(titleLayout1);
		m_listAdapter = createListAdapter(listItems);
		dialogBuilder.setSingleChoiceItems(m_listAdapter, -1, onClickListener);
		dialogBuilder.setCancelable(false);
		return dialogBuilder;
	}

	private void updateDirectory()
	{
		m_subdirs.clear();
		m_subdirs.addAll( getDirectories(m_dir) );
		m_titleView.setText(m_dir);
		m_listAdapter.notifyDataSetChanged();
		//#scorch
		if (Select_type == FileSave || Select_type == FileOpen)
		{
			input_text.setText(Selected_File_Name);
		}
	}

	private ArrayAdapter<String> createListAdapter(List<String> items)
	{
		return new ArrayAdapter<String>(m_context, android.R.layout.select_dialog_item, android.R.id.text1, items)
		{
			@Override
			public View getView(int position, View convertView, ViewGroup parent)
			{
				View v = super.getView(position, convertView, parent);
				if (v instanceof TextView)
				{
					// Enable list item (directory) text wrapping
					TextView tv = (TextView) v;
					tv.getLayoutParams().height = LayoutParams.WRAP_CONTENT;
					tv.setEllipsize(null);
				}
				return v;
			}
		};
	}
}
