/**
 * Copyright (C) 2013- Iordan Iordanov
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 * USA.
 */


package com.undatech.opaque;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;

import com.undatech.opaque.R;

import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.DialogFragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.widget.LinearLayout.LayoutParams;

public class ManageCustomCaFragment extends DialogFragment {
	public static String TAG = "ManageCustomCaFragment";
	public static int TYPE_OVIRT = 0;
	public static int TYPE_SPICE = 1;
	
    public interface OnFragmentDismissedListener {
        public void onFragmentDismissed(ConnectionSettings currentConnection);
    }
	
    private OnFragmentDismissedListener dismissalListener;
    private int caPurpose;
    private ConnectionSettings currentConnection;
    
	private EditText caCertPath;
	private EditText caCert;
	private Button importButton;
	private Button helpButton;
    
    static ManageCustomCaFragment newInstance(int caPurpose, ConnectionSettings currentConnection) {
    	ManageCustomCaFragment f = new ManageCustomCaFragment();

        // Supply the CA purpose as an argument.
        Bundle args = new Bundle();
        args.putInt("caPurpose", caPurpose);
        args.putSerializable("currentConnection", currentConnection);
        f.setArguments(args);

        return f;
    }
    
    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
        	dismissalListener = (OnFragmentDismissedListener) activity;
        	android.util.Log.e(TAG, "onAttach: assigning OnFragmentDismissedListener");
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " must implement OnFragmentDismissedListener");
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
		
        caPurpose = getArguments().getInt("caPurpose");
        currentConnection = (ConnectionSettings)getArguments().getSerializable("currentConnection");
    }
    
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View v = inflater.inflate(R.layout.manage_custom_ca, container, false);
        
    	// Set title for this dialog
    	getDialog().setTitle(R.string.manage_custom_ca_title);

		caCert      = (EditText) v.findViewById(R.id.caCert);
		caCertPath  = (EditText) v.findViewById(R.id.caCertPath);
		
		// Set up the import button.
		importButton = (Button) v.findViewById(R.id.importButton);
		importButton.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				importCaCert();
			}
		});
		
		// Set up the help button.
		helpButton = (Button) v.findViewById(R.id.helpButton);
		helpButton.setOnClickListener(new View.OnClickListener() {
			
			@Override
			public void onClick(View v) {
				//TODO: Show help
			}
		});
		
		// Set the widgets' state appropriately.
		setWidgetStateAppropriately ();
        return v;
    }
    
	private void importCaCert () {
		Context context = getActivity();
		File file = new File (caCertPath.getText().toString());
		FileReader freader;
		try {
			freader = new FileReader(file);
			BufferedReader reader = new BufferedReader(freader);
	        StringBuffer buf = new StringBuffer();
	        String line = null;
	        do {
	        	try {
					line = reader.readLine();
					if (line != null)
						buf.append(line + '\n');
				} catch (IOException e) {
					Toast.makeText(context, R.string.ca_file_error_reading, Toast.LENGTH_LONG).show();
				}
	        } while (line != null);
	        caCert.setText(buf.toString());
		} catch (FileNotFoundException e) {
			Toast.makeText(context, R.string.ca_file_not_found, Toast.LENGTH_LONG).show();
		}
	}
    
	private void setWidgetStateAppropriately () {
		if (caPurpose == ManageCustomCaFragment.TYPE_OVIRT) {
			caCert.setText(currentConnection.getOvirtCaData());
			caCertPath.setText(getExternalSDCardDirectory());
		}
	}
    
    @Override
    public void onDismiss (DialogInterface dialog) {
    	android.util.Log.e(TAG, "dismiss: sending back data to Activity");
		// Depending on the value of caPurpose, assign the certs in currentConnection.
		if (caPurpose == ManageCustomCaFragment.TYPE_OVIRT) {
			android.util.Log.e(TAG, "Setting custom oVirt CA");
			currentConnection.setOvirtCaData(caCert.getText().toString());
		}

    	dismissalListener.onFragmentDismissed(currentConnection);
    }
    
    public String getExternalSDCardDirectory() {
        File dir = Environment.getExternalStorageDirectory();
        return dir.getAbsolutePath() + "/";
    }

}
