package com.pantallas;
//package com.wiztech.wahab;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.database.sqlite.SQLiteOpenHelper;

public class DataBaseManager extends SQLiteOpenHelper{
  
    private static String DB_PATH = "/data/data/yourPakagename/databases/";
   
    private static String DB_NAME = "databasename.sq3";
     
    private SQLiteDatabase myDataBase; 
    private SQLiteDatabase myData; 
 
    private final Context myContext;
 
    public DataBaseManager(Context context) {
     super(context, DB_NAME, null, 1);
        this.myContext = context;
    }
    
/**
     * Creates a empty database on the system and rewrites it with your own database.
     * */
    public void createDataBase() throws IOException{
 
     boolean dbExist = checkDataBase();
     if(dbExist){
      
      
     }else{ 
      CopyFiles();
     }
    }
 

    private void CopyFiles()
    {
     try
        { 
        InputStream is = myContext.getAssets().open(DB_NAME); 
         File outfile = new File(DB_PATH,DB_NAME);
         outfile.getParentFile().mkdirs();
         outfile.createNewFile();
         
        if (is == null)
          throw new RuntimeException("stream is null");
        else
        {
             FileOutputStream out = new FileOutputStream(outfile);      
         byte buf[] = new byte[128];
             do {
              int numread = is.read(buf);
                 if (numread <= 0)
                     break;
              out.write(buf, 0, numread);
               } while (true);
             
             is.close();
             out.close();
        }
        }
        catch (IOException e)
        {
           throw new RuntimeException(e); 
        }
        
    }    
 
    /**
     * Check if the database already exist to avoid re-copying the file each time you open the application.
     * @return true if it exists, false if it doesn't
     */
    private boolean checkDataBase(){
 
     SQLiteDatabase checkDB = null;
 
     try{
      String myPath = DB_PATH + DB_NAME;
      checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
 
     }catch(SQLiteException e){
 
     }
 
     if(checkDB != null){
      checkDB.close();
     }
 
     return checkDB != null ? true : false;
    }
 
    /**
     * Copies your database from your local assets-folder to the just created empty database in the
     * system folder, from where it can be accessed and handled.
     * This is done by transfering bytestream.
     * */
    @SuppressWarnings("unused")
 private void copyDataBase() throws IOException{
 
     //Open your local db as the input stream
     InputStream myInput = myContext.getAssets().open(DB_NAME);
 
     // Path to the just created empty db
     String outFileName = DB_PATH + DB_NAME;
 
     //Open the empty db as the output stream
     OutputStream myOutput = new FileOutputStream(outFileName);
 
     //transfer bytes from the inputfile to the outputfile
     byte[] buffer = new byte[1024];
     int length;
     while ((length = myInput.read(buffer))>0){
      myOutput.write(buffer, 0, length);
     }
 
     //Close the streams
     myOutput.flush();
     myOutput.close();
     myInput.close();
 
    }
 
    public void openDataBase() throws SQLException{
 
     
     
     //Open the database
      String myPath = DB_PATH + DB_NAME;
      
      myDataBase = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.NO_LOCALIZED_COLLATORS);
 
    }
 
    @Override
 public synchronized void close() {
 
         if(myDataBase != null)
          myDataBase.close();
 
         super.close();
 
 }
 
 @Override
 public void onCreate(SQLiteDatabase db) {
 
 }
 
 @Override
 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
 
 }
 

    //---retrieve records---
    public Cursor selectQuery(String query) throws SQLException 
    {
     String myPath = DB_PATH + DB_NAME;
     //myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.CREATE_IF_NECESSARY);
     myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);

     Cursor mCursor =myData.rawQuery(query, null);
     mCursor.moveToFirst();     
        myData.close();
        
        return mCursor;
    }
    
    
    ////////// For Insert And Update Data ////////
    public void insert_update(String query) throws SQLException 
    {
     String myPath = DB_PATH + DB_NAME;
     
     myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
     myData.execSQL(query);
        myData.close();        
    }
     
    public void execute(String query) throws SQLException 
    {
     String myPath = DB_PATH + DB_NAME;
     
     myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
     myData.execSQL(query);
        myData.close();        
    }
    
    public boolean UpdateVote_Individual(String rowid,String value,String count) {
       String myPath = DB_PATH + DB_NAME;
     myData = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READWRITE);
       
       ContentValues args = new ContentValues();
          args.put("total_votes", count);
          return myData.update("promotors", args, 
            "promoter_id='" + rowid+"'", null) > 0;       
            
      }
  
}

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