/*
 *  Copyright (C) 2004-2013 Savoir-Faire Linux Inc.
 *
 *  Author: Alexandre Lision <alexandre.lision@savoirfairelinux.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 3 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *  Additional permission under GNU GPL version 3 section 7:
 *
 *  If you modify this program, or any covered work, by linking or
 *  combining it with the OpenSSL project's OpenSSL library (or a
 *  modified version of that library), containing parts covered by the
 *  terms of the OpenSSL or SSLeay licenses, Savoir-Faire Linux Inc.
 *  grants you additional permission to convey the resulting work.
 *  Corresponding Source for a non-source form of such a combination
 *  shall include the source code for the parts of OpenSSL used as well
 *  as that of the covered work.
 */

package com.savoirfairelinux.sflphone.fragments;

import android.app.Activity;
import android.app.Fragment;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PointF;
import android.os.Bundle;
import android.os.RemoteException;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.View;
import android.view.ViewGroup;

import com.savoirfairelinux.sflphone.R;
import com.savoirfairelinux.sflphone.model.Attractor;
import com.savoirfairelinux.sflphone.model.Bubble;
import com.savoirfairelinux.sflphone.model.BubbleModel;
import com.savoirfairelinux.sflphone.model.BubblesView;
import com.savoirfairelinux.sflphone.model.Conference;
import com.savoirfairelinux.sflphone.model.SipCall;
import com.savoirfairelinux.sflphone.service.ISipService;
import com.savoirfairelinux.sflphone.views.CounterTextView;

public class CallFragment extends Fragment implements Callback {

    static final String TAG = "CallFragment";

    static final float BUBBLE_SIZE = 75;
    static final float ATTRACTOR_SIZE = 40;

    private Conference conf;

    private CounterTextView callStatusTxt;
    private BubblesView view;
    private BubbleModel model;

    private Callbacks mCallbacks = sDummyCallbacks;

    private SipCall myself;

    private Bitmap hangup_icon, separate_icon;
    private Bitmap call_icon;

    @Override
    public void onCreate(Bundle savedBundle) {
        super.onCreate(savedBundle);
        Bundle b = getArguments();
        conf = new Conference((Conference) b.getParcelable("conference"));
        model = new BubbleModel(getResources().getDisplayMetrics().density);

    }

    /**
     * A dummy implementation of the {@link Callbacks} interface that does nothing. Used only when this fragment is not attached to an activity.
     */
    private static Callbacks sDummyCallbacks = new Callbacks() {
        @Override
        public void onSendMessage(SipCall call, String msg) {
        }

        @Override
        public void callContact(SipCall call) {
        }

        @Override
        public void onCallAccepted(SipCall call) {
        }

        @Override
        public void onCallRejected(SipCall call) {
        }

        @Override
        public void onCallEnded(SipCall call) {
        }

        @Override
        public void onCallSuspended(SipCall call) {
        }

        @Override
        public void onCallResumed(SipCall call) {
        }

        @Override
        public void onCalltransfered(SipCall call, String to) {
        }

        @Override
        public void onRecordCall(SipCall call) {
        }

        @Override
        public ISipService getService() {
            return null;
        }

        @Override
        public void replaceCurrentCallDisplayed() {
        }
    };

    /**
     * The Activity calling this fragment has to implement this interface
     * 
     */
    public interface Callbacks {

        public ISipService getService();

        public void callContact(SipCall call);

        public void onCallAccepted(SipCall call);

        public void onCallRejected(SipCall call);

        public void onCallEnded(SipCall call);

        public void onCallSuspended(SipCall call);

        public void onCallResumed(SipCall call);

        public void onCalltransfered(SipCall call, String to);

        public void onRecordCall(SipCall call);

        public void onSendMessage(SipCall call, String msg);

        public void replaceCurrentCallDisplayed();
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        if (!(activity instanceof Callbacks)) {
            throw new IllegalStateException("Activity must implement fragment's callbacks.");
        }

        // rootView.requestDisallowInterceptTouchEvent(true);

        mCallbacks = (Callbacks) activity;
        myself = SipCall.SipCallBuilder.buildMyselfCall(activity.getContentResolver(), "Me");

    }

    @Override
    public void onDetach() {
        super.onDetach();
        mCallbacks = sDummyCallbacks;
        // rootView.requestDisallowInterceptTouchEvent(false);
    }

    @Override
    public void onStop() {
        super.onStop();
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.frag_call, container, false);

        view = (BubblesView) rootView.findViewById(R.id.main_view);
        view.setFragment(this);
        view.setModel(model);
        view.getHolder().addCallback(this);

        callStatusTxt = (CounterTextView) rootView.findViewById(R.id.call_status_txt);

        hangup_icon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_hangup);
        call_icon = BitmapFactory.decodeResource(getResources(), R.drawable.ic_call);
        separate_icon = BitmapFactory.decodeResource(getResources(), R.drawable.icon_separate);

        // Do nothing here, the view is not initialized yet.
        return rootView;
    }

    private void initNormalStateDisplay() {
        Log.i(TAG, "Start normal display");

        callStatusTxt.setText("0 min");

        getBubbleFor(myself, model.width / 2, model.height / 2);

        int angle_part = 360 / conf.getParticipants().size();
        double dX = 0;
        double dY = 0;
        int radiusCalls = model.width / 2 - 150;
        for (int i = 0; i < conf.getParticipants().size(); ++i) {

            if (conf.getParticipants().get(i) == null) {
                Log.i(TAG, i + " null ");
                continue;
            }
            dX = Math.cos(Math.toRadians(angle_part * i - 90)) * radiusCalls;
            dY = Math.sin(Math.toRadians(angle_part * i - 90)) * radiusCalls;
            getBubbleFor(conf.getParticipants().get(i), (int) (model.width / 2 + dX), (int) (model.height / 2 + dY));
        }

        model.clearAttractors();
        model.addAttractor(new Attractor(new PointF(model.width / 1.1f, model.height * .1f), ATTRACTOR_SIZE, new Attractor.Callback() {
            @Override
            public boolean onBubbleSucked(Bubble b) {
                Log.w(TAG, "Bubble sucked ! ");

                if (b.associated_call.getContact().isUser()) {

                    try {
                        if (conf.hasMultipleParticipants())
                            mCallbacks.getService().hangUpConference(conf.getId());
                        else
                            mCallbacks.onCallEnded(conf.getParticipants().get(0));
                    } catch (RemoteException e) {
                        e.printStackTrace();
                    }

                } else {
                    mCallbacks.onCallEnded(b.associated_call);
                }
                bubbleRemoved(b);
                return true;
            }
        }, hangup_icon));

        // if (conf.hasMultipleParticipants()) {
        // model.addAttractor(new Attractor(new PointF(model.width / 1.1f, model.height * .9f), ATTRACTOR_SIZE, new Attractor.Callback() {
        // @Override
        // public boolean onBubbleSucked(Bubble b) {
        //
        // try {
        // mCallbacks.getService().detachParticipant(b.associated_call.getCallId());
        // } catch (RemoteException e) {
        // e.printStackTrace();
        // }
        //
        // bubbleRemoved(b);
        // return true;
        // }
        // }, separate_icon));
        // }

        // if(mCalls.size() == 1 && mCalls.get(0).isOnHold()){
        // mCallbacks.onCallResumed(mCalls.get(0));
        // }

    }

    private void initIncomingCallDisplay() {
        Log.i(TAG, "Start incoming display");

        callStatusTxt.setText("Incoming call");

        getBubbleFor(conf.getParticipants().get(0), model.width / 2, model.height / 2);

        model.clearAttractors();
        model.addAttractor(new Attractor(new PointF(4 * model.width / 5, model.height / 2), ATTRACTOR_SIZE, new Attractor.Callback() {
            @Override
            public boolean onBubbleSucked(Bubble b) {
                mCallbacks.onCallAccepted(conf.getParticipants().get(0));
                return false;
            }
        }, call_icon));
        model.addAttractor(new Attractor(new PointF(model.width / 5, model.height / 2), ATTRACTOR_SIZE, new Attractor.Callback() {
            @Override
            public boolean onBubbleSucked(Bubble b) {
                mCallbacks.onCallRejected(conf.getParticipants().get(0));
                bubbleRemoved(b);
                return true;
            }
        }, hangup_icon));
    }

    private void initOutGoingCallDisplay() {
        Log.i(TAG, "Start outgoing display");

        callStatusTxt.setText("Calling...");

        getBubbleFor(myself, model.width / 2, model.height / 2);

        // TODO off-thread image loading
        int angle_part = 360 / conf.getParticipants().size();
        double dX = 0;
        double dY = 0;
        int radiusCalls = model.width / 2 - 150;
        for (int i = 0; i < conf.getParticipants().size(); ++i) {
            dX = Math.cos(Math.toRadians(angle_part * i - 90)) * radiusCalls;
            dY = Math.sin(Math.toRadians(angle_part * i - 90)) * radiusCalls;
            getBubbleFor(conf.getParticipants().get(i), (int) (model.width / 2 + dX), (int) (model.height / 2 + dY));
        }

        model.clearAttractors();
        model.addAttractor(new Attractor(new PointF(model.width / 1.1f, model.height * .1f), 40, new Attractor.Callback() {
            @Override
            public boolean onBubbleSucked(Bubble b) {
                Log.w(TAG, "Bubble sucked ! ");
                mCallbacks.onCallEnded(conf.getParticipants().get(0));
                bubbleRemoved(b);
                return true;
            }
        }, hangup_icon));
    }

    /**
     * Retrieves or create a bubble for a given contact. If the bubble exists, it is moved to the new location.
     * 
     * @param call
     *            The call associated to a contact
     * @param x
     *            Initial or new x position.
     * @param y
     *            Initial or new y position.
     * @return Bubble corresponding to the contact.
     */
    private Bubble getBubbleFor(SipCall call, float x, float y) {
        Bubble contact_bubble = model.getBubble(call);
        if (contact_bubble != null) {
            contact_bubble.attractor.set(x, y);
            return contact_bubble;
        }

        contact_bubble = new Bubble(getActivity(), call, x, y, BUBBLE_SIZE);

        model.addBubble(contact_bubble);
        return contact_bubble;
    }

    /**
     * Should be called when a bubble is removed from the model
     */
    void bubbleRemoved(Bubble b) {
        if (b.associated_call == null) {
            return;
        }
    }

    public void changeCallState(String callID, String newState) {
        Log.w(TAG, "Call :" + callID + newState);
        if (newState.contentEquals("FAILURE")) {
            try {
                mCallbacks.getService().hangUp(callID);
            } catch (RemoteException e) {
                e.printStackTrace();
            }
        }
        if (conf.getParticipants() == null) {
            Log.w(TAG, "IT IS NULL");
            return;
        }

        Log.w(TAG, "conf.getParticipants().size():" + conf.getParticipants().size());
        for (int i = 0; i < conf.getParticipants().size(); ++i) {
            // conf.getParticipants().get(i).printCallInfo();
            Log.w(TAG, "Call id:" + conf.getParticipants().get(i).getCallId());
            Log.w(TAG, "Searching:" + callID);
            if (callID.equals(conf.getParticipants().get(i).getCallId())) {
                if (newState.contentEquals("HUNGUP")) {
                    Log.w(TAG, "Call hungup:" + conf.getParticipants().get(i).getContact().getmDisplayName());
                    model.removeBubble(conf.getParticipants().get(i));
                    conf.getParticipants().remove(i);
                } else {
                    Log.w(TAG, "Call:" + conf.getParticipants().get(i).getContact().getmDisplayName() + " state:" + newState);
                    conf.getParticipants().get(i).setCallState(newState);
                }
            }
        }

        if (conf.isOnGoing())
            initNormalStateDisplay();

        if (conf.getParticipants().size() == 0) {
            mCallbacks.replaceCurrentCallDisplayed();
        }

    }

    public boolean draggingBubble() {
        return view == null ? false : view.isDraggingBubble();
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        // Log.i(TAG, "Init fragment " + mCall.getCallId());

        // mCall.printCallInfo();
        if (conf.getParticipants().size() == 1) {

            if (conf.getParticipants().get(0).isIncoming() && conf.getParticipants().get(0).isRinging()) {
                initIncomingCallDisplay();
            } else {
                if (conf.getParticipants().get(0).isRinging()) {
                    initOutGoingCallDisplay();
                }
                try {
                    if (conf.getParticipants().get(0).isOutGoing()
                            && mCallbacks.getService().getCall(conf.getParticipants().get(0).getCallId()) == null) {
                        mCallbacks.getService().placeCall(conf.getParticipants().get(0));
                        initOutGoingCallDisplay();
                    } else if (conf.getParticipants().get(0).isOutGoing() && conf.getParticipants().get(0).isRinging()) {
                        initOutGoingCallDisplay();
                    }
                } catch (RemoteException e) {
                    Log.e(TAG, e.toString());
                }
            }

            if (conf.getParticipants().get(0).isOngoing()) {
                initNormalStateDisplay();
            }
        } else if (conf.getParticipants().size() > 1) {
            initNormalStateDisplay();
        }

    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
    }

    public BubblesView getBubbleView() {
        return view;

    }

}