package ve.gob.cenditel.tibisaymovil;
import java.io.File;

import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.Preference.OnPreferenceChangeListener;
import android.preference.Preference.OnPreferenceClickListener;
import android.preference.PreferenceActivity;
import android.provider.MediaStore;
import android.view.Window;
import android.widget.Toast;

public class PreferencesActivity extends PreferenceActivity implements OnPreferenceClickListener,OnPreferenceChangeListener{
	
	static final int PICK_IMAGE = 33;
	public static final String imageKey = "image";
	public static final String positionKey = "position";
	private static final int MAXWIDTH = 400;
	private static final int MAXHEIGHT = 400;
	private static final long SIZELIMIT = 1024 * 1024;
	
	private SharedPreferences options;
	private Preference imagePreference;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
		//Estilando la barra de titulo
		final boolean customTitleSupported = requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

        super.onCreate(savedInstanceState);

        addPreferencesFromResource(R.xml.preferences);
        
        this.options = this.getPreferenceManager().getSharedPreferences();
        
        

        
        this.imagePreference = (Preference) findPreference(PreferencesActivity.imageKey);
        this.imagePreference.setOnPreferenceClickListener(this);
        this.imagePreference.setOnPreferenceChangeListener(this);
        
        this.loadSummary();
        

        //Estilando Barra de titulo
		if(customTitleSupported)
			getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.title_bar);
        
    }
    
	private void loadSummary() {
	    String path = options.getString(PreferencesActivity.imageKey, "");
        if (!path.equals("")){
        	this.imagePreference.setSummary(path);
        }
        
	}

    
    
    @Override
	public boolean onPreferenceChange(Preference preference, Object newValue) {
    	  String summary="";
       	  
    	  
    	  if (summary!=null && !summary.equals("")){
    		  preference.setSummary((CharSequence) summary);
		  	  
		  }
    	  return true;
	}


	
	@Override
	public boolean onPreferenceClick(Preference preference) {
		
		if (preference.getKey().equals(PreferencesActivity.imageKey)){
				Intent i = new Intent(
				Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
				startActivityForResult(i, PreferencesActivity.PICK_IMAGE);
				return true;
		}
		return false;
	}
    
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
	     super.onActivityResult(requestCode, resultCode, data);
	     
	     
	     if (requestCode == PreferencesActivity.PICK_IMAGE && resultCode == RESULT_OK){
	    	 
	    	 Uri selectedImage = data.getData();
	         String[] filePathColumn = { MediaStore.Images.Media.DATA };
	 
	         Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
	         cursor.moveToFirst();
	 
	         int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
	         String imageSelectedPath = cursor.getString(columnIndex);
	         cursor.close();
	         
	         //Filter images if wrong format.
	         boolean validImage = this.validateImage(imageSelectedPath);
	         
	    	 if (validImage==true){
	    		 //Save and edit summary text in user interface.
	    		SharedPreferences.Editor editor = this.options.edit();
	         	editor.putString(PreferencesActivity.imageKey, imageSelectedPath);
	         	editor.commit();
	         	this.imagePreference.setSummary(imageSelectedPath);
	    	 }
	         
	     
	  
	     }

	     
	     
	     
	}

	//Check image dimensions and format.
	private boolean validateImage(String imageSelectedPath) {
		File f = new File(imageSelectedPath);
		long size = f.length();

		if (size <= (PreferencesActivity.SIZELIMIT)) {
			
			Bitmap chosenImage = BitmapFactory.decodeFile(imageSelectedPath);
			
			if (chosenImage !=null)
				return this.checkDimensions(chosenImage);
			else{
				Toast.makeText(this, this.getString(R.string.errorformat),Toast.LENGTH_SHORT).show();
				return false;
			}

		} else {
			Toast.makeText(this, this.getString(R.string.errorsize)+" "+(PreferencesActivity.SIZELIMIT)/(1024*1024)+"MB",Toast.LENGTH_SHORT).show();
			return false;
		}
		
		
		
	}


	private boolean checkDimensions(Bitmap chosenImage) {

		int width = chosenImage.getWidth();
		int height = chosenImage.getHeight();

		if (width <= PreferencesActivity.MAXWIDTH && height <= PreferencesActivity.MAXHEIGHT) {
			return true;
			
		} else {

			Toast.makeText(	this,this.getString(R.string.errordimension) +" "+ PreferencesActivity.MAXWIDTH
							+ "x" + PreferencesActivity.MAXHEIGHT,Toast.LENGTH_SHORT).show();
			return false;
		}		
	}


	

}