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 a few aspects of the netplay connection: Requesting

 * the network system loop to run at high frequency while the activity is in

 * the foreground, and 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;

		}

	};

}