/* Copyright (c) 2008-2009 -- CommonsWare, LLC

	 Licensed under the Apache License, Version 2.0 (the "License");
	 you may not use this file except in compliance with the License.
	 You may obtain a copy of the License at

		 http://www.apache.org/licenses/LICENSE-2.0

	 Unless required by applicable law or agreed to in writing, software
	 distributed under the License is distributed on an "AS IS" BASIS,
	 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	 See the License for the specific language governing permissions and
	 limitations under the License.
*/
	 
package com.commonsware.android.constants;

import android.app.AlertDialog;
import android.app.ListActivity;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.Cursor;
import android.os.Bundle;
import android.text.method.NumberKeyListener;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.SimpleCursorAdapter;
import android.widget.TextView;

public class ConstantsBrowser extends ListActivity {
	private static final int ADD_ID = Menu.FIRST+1;
	private static final int EDIT_ID = Menu.FIRST+2;
	private static final int DELETE_ID = Menu.FIRST+3;
	private static final int CLOSE_ID = Menu.FIRST+4;
	private static final String[] PROJECTION = new String[] {
			Provider.Constants._ID, Provider.Constants.TITLE,
			Provider.Constants.VALUE};
	private Cursor constantsCursor;
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		constantsCursor=managedQuery(Provider.Constants.CONTENT_URI,
																	PROJECTION, null, null, null);
	
		ListAdapter adapter=new SimpleCursorAdapter(this,
													R.layout.row, constantsCursor,
													new String[] {Provider.Constants.TITLE,
																					Provider.Constants.VALUE},
													new int[] {R.id.title, R.id.value});
		
		setListAdapter(adapter);
		registerForContextMenu(getListView());
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		menu.add(Menu.NONE, ADD_ID, Menu.NONE, "Add")
				.setIcon(R.drawable.add)
				.setAlphabeticShortcut('a');
		menu.add(Menu.NONE, CLOSE_ID, Menu.NONE, "Close")
				.setIcon(R.drawable.eject)
				.setAlphabeticShortcut('c');

		return(super.onCreateOptionsMenu(menu));
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
			case ADD_ID:
				add();
				return(true);
				
			case CLOSE_ID:
				finish();
				return(true);
		}

		return(super.onOptionsItemSelected(item));
	}
	
	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
																		ContextMenu.ContextMenuInfo menuInfo) {
		menu.add(Menu.NONE, DELETE_ID, Menu.NONE, "Delete")
				.setIcon(R.drawable.delete)
				.setAlphabeticShortcut('d');
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		switch (item.getItemId()) {
			case DELETE_ID:
				delete();
				return(true);
		}

		return(super.onOptionsItemSelected(item));
	}
	
	private void add() {
		LayoutInflater inflater=LayoutInflater.from(this);
		View addView=inflater.inflate(R.layout.add_edit, null);
		final DialogWrapper wrapper=new DialogWrapper(addView);
		
		new AlertDialog.Builder(this)
			.setTitle(R.string.add_title)
			.setView(addView)
			.setPositiveButton(R.string.ok,
													new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog,
															int whichButton) {
					processAdd(wrapper);
				}
			})
			.setNegativeButton(R.string.cancel,
													new DialogInterface.OnClickListener() {
				public void onClick(DialogInterface dialog,
															int whichButton) {
					// ignore, just dismiss
				}
			})
			.show();
	}
	
	private void delete() {
		final long rowId=getSelectedItemId();
		
		if (rowId>0) {
			new AlertDialog.Builder(this)
				.setTitle(R.string.delete_title)
				.setPositiveButton(R.string.ok,
														new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog,
																int whichButton) {
						processDelete(rowId);
					}
				})
				.setNegativeButton(R.string.cancel,
														new DialogInterface.OnClickListener() {
					public void onClick(DialogInterface dialog,
																int whichButton) {
					// ignore, just dismiss
					}
				})
				.show();
		}
	}
	
	private void processAdd(DialogWrapper wrapper) {
		ContentValues values=new ContentValues(2);
		
		values.put(Provider.Constants.TITLE, wrapper.getTitle());
		values.put(Provider.Constants.VALUE, wrapper.getValue());
		
		getContentResolver().insert(Provider.Constants.CONTENT_URI,
																	values);
		constantsCursor.requery();
	}
	
	private void processDelete(long rowId) {
		String[] parms=new String[1];
		
		parms[0]=new Long(rowId).toString();

		getContentResolver().delete(Provider.Constants.CONTENT_URI,
																	"_ID=?", parms);
		constantsCursor.requery();
	}
	
	class DialogWrapper {
		EditText titleField=null;
		EditText valueField=null;
		View base=null;
		
		DialogWrapper(View base) {
			this.base=base;
			valueField=(EditText)base.findViewById(R.id.value);
			valueField.setKeyListener(new FloatKeyListener());
		}
		
		String getTitle() {
			return(getTitleField().getText().toString());
		}
		
		float getValue() {
			return(new Float(getValueField().getText().toString())
																									.floatValue());
		}
		
		private EditText getTitleField() {
			if (titleField==null) {
				titleField=(EditText)base.findViewById(R.id.title);
			}
			
			return(titleField);
		}
		
		private EditText getValueField() {
			if (valueField==null) {
				
			}
			
			return(valueField);
		}
	}
	
	class FloatKeyListener extends NumberKeyListener {
		private static final String CHARS="0123456789-.";
		
		protected char[] getAcceptedChars() {
			return(CHARS.toCharArray()); 
		}
	}
}