/*

 * Hedgewars for Android. An Android port of Hedgewars, a free turn based strategy game

 * Copyright (C) 2012 Simeon Maxein <smaxein@googlemail.com>

 *

 * This program 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 2

 * of the License, or (at your option) any later version.

 *

 * This program 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 program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 */

package org.hedgewars.hedgeroid;

import org.hedgewars.hedgeroid.R;

import org.hedgewars.hedgeroid.frontlib.Frontlib;

import org.hedgewars.hedgeroid.netplay.Netplay;

import org.hedgewars.hedgeroid.netplay.Netplay.State;

import android.app.Activity;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.content.IntentFilter;

import android.os.Bundle;

import android.support.v4.app.Fragment;

import android.support.v4.content.LocalBroadcastManager;

import android.widget.Toast;

/**

 * Fragment for use by an activity that depends on the state of the network

 * connection. The activity must implement the NetplayStateListener interface.

 *

 * This fragment manages reacting to changes in the networking state by calling

 * a callback method on the activity.

 */

public class NetplayStateFragment extends Fragment {

    private Netplay netplay;

    private Context appContext;

    private LocalBroadcastManager broadcastManager;

    private NetplayStateListener listener;

    private State knownState;

    interface NetplayStateListener {

        /**

         * This is called while the activity is running, and every time during resume, if

         * a change in the networking state is detected. It is also called once

         * with the initial state (which could be called a change from the "unknown" state).

         */

        void onNetplayStateChanged(State newState);

    }

    @Override

    public void onAttach(Activity activity) {

        super.onAttach(activity);

        try {

            listener = (NetplayStateListener) activity;

        } catch(ClassCastException e) {

            throw new ClassCastException("Activity " + activity + " must implement NetplayStateListener to use NetplayStateFragment.");

        }

    }

    @Override

    public void onDetach() {

        super.onDetach();

        listener = null;

    }

    @Override

    public void onCreate(Bundle icicle) {

        super.onCreate(icicle);

        appContext = getActivity().getApplicationContext();

        broadcastManager = LocalBroadcastManager.getInstance(appContext);

        netplay = Netplay.getAppInstance(appContext);

    }

    @Override

    public void onResume() {

        super.onResume();

        broadcastManager.registerReceiver(disconnectReceiver, new IntentFilter(Netplay.ACTION_DISCONNECTED));

        broadcastManager.registerReceiver(leaveRoomReceiver, new IntentFilter(Netplay.ACTION_LEFT_ROOM));

        broadcastManager.registerReceiver(stateChangeReceiver, new IntentFilter(Netplay.ACTION_STATE_CHANGED));

        State newState = netplay.getState();

        if(knownState != newState) {

            listener.onNetplayStateChanged(newState);

            knownState = newState;

        }

    }

    @Override

    public void onPause() {

        super.onPause();

        broadcastManager.unregisterReceiver(disconnectReceiver);

        broadcastManager.unregisterReceiver(leaveRoomReceiver);

        broadcastManager.unregisterReceiver(stateChangeReceiver);

    }

    private final BroadcastReceiver disconnectReceiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            if(intent.getBooleanExtra(Netplay.EXTRA_HAS_ERROR, true)) {

                String message = intent.getStringExtra(Netplay.EXTRA_MESSAGE);

                String toastText = getString(R.string.toast_disconnected, message);

                Toast.makeText(appContext, toastText, Toast.LENGTH_LONG).show();

            }

        }

    };

    private final BroadcastReceiver leaveRoomReceiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            int reason = intent.getIntExtra(Netplay.EXTRA_REASON, -1);

            if(reason == Frontlib.NETCONN_ROOMLEAVE_ABANDONED) {

                Toast.makeText(appContext, R.string.toast_room_abandoned, Toast.LENGTH_LONG).show();

            } else if(reason == Frontlib.NETCONN_ROOMLEAVE_KICKED) {

                Toast.makeText(appContext, R.string.toast_kicked, Toast.LENGTH_LONG).show();

            }

        }

    };

    private final BroadcastReceiver stateChangeReceiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            State newState = netplay.getState();

            listener.onNetplayStateChanged(newState);

            knownState = newState;

        }

    };

}