/*
 * Nextcloud Talk application
 *
 * @author Mario Danic
 * Copyright (C) 2017-2018 Mario Danic <mario@lovelyhq.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, see <http://www.gnu.org/licenses/>.
 */

package com.nextcloud.talk.webrtc;

import com.google.android.gms.common.api.Api;
import com.nextcloud.talk.api.ExternalSignaling;
import com.nextcloud.talk.application.NextcloudTalkApplication;
import com.nextcloud.talk.models.database.UserEntity;
import com.nextcloud.talk.models.json.rooms.Conversation;
import com.nextcloud.talk.models.json.signaling.NCMessageWrapper;
import com.nextcloud.talk.models.json.signaling.NCSignalingMessage;
import com.nextcloud.talk.models.json.websocket.AuthParametersWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.AuthWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.CallOverallWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.CallWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.HelloOverallWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.HelloWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.RecipientWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.RequestOfferOverallWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.RequestOfferSignalingMessage;
import com.nextcloud.talk.models.json.websocket.RoomOverallWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.RoomWebSocketMessage;
import com.nextcloud.talk.models.json.websocket.SignalingDataWebSocketMessageForOffer;
import com.nextcloud.talk.utils.ApiUtils;
import com.tinder.scarlet.Scarlet;
import com.tinder.scarlet.messageadapter.moshi.MoshiMessageAdapter;
import com.tinder.scarlet.retry.LinearBackoffStrategy;
import com.tinder.scarlet.streamadapter.rxjava2.RxJava2StreamAdapterFactory;
import com.tinder.scarlet.websocket.okhttp.OkHttpClientUtils;

import java.util.HashMap;
import java.util.Map;

import javax.inject.Inject;

import autodagger.AutoInjector;
import okhttp3.OkHttpClient;

@AutoInjector(NextcloudTalkApplication.class)
public class ScarletHelper {
    private Map<String, ExternalSignaling> externalSignalingMap = new HashMap<>();

    @Inject
    OkHttpClient okHttpClient;

    public ScarletHelper() {
        NextcloudTalkApplication.getSharedApplication().getComponentApplication().inject(this);
    }

    private String getExternalSignalingServerUrlFromSettingsUrl(String url) {
        String generatedURL = url.replace("https://", "wss://").replace("http://", "ws://");

        if (generatedURL.endsWith("/")) {
            generatedURL += "spreed";
        } else {
            generatedURL += "/spreed";
        }

        return generatedURL;
    }

    public ExternalSignaling getExternalSignalingInstanceForServer(String url, boolean forceReconnect) {
        String connectionUrl = getExternalSignalingServerUrlFromSettingsUrl(url);

        if (externalSignalingMap.containsKey(connectionUrl) && !forceReconnect) {
            return externalSignalingMap.get(connectionUrl);
        } else {
            Scarlet scarlet = new Scarlet.Builder()
                    .backoffStrategy(new LinearBackoffStrategy(500))
                    .webSocketFactory(OkHttpClientUtils.newWebSocketFactory(okHttpClient, connectionUrl))
                    .addMessageAdapterFactory(new MoshiMessageAdapter.Factory())
                    .addStreamAdapterFactory(new RxJava2StreamAdapterFactory())
                    .build();
            ExternalSignaling externalSignaling = scarlet.create(ExternalSignaling.class);
            externalSignalingMap.put(connectionUrl, externalSignaling);
            return externalSignaling;
        }
    }

    public HelloOverallWebSocketMessage getAssembledHelloModel(UserEntity userEntity, String ticket) {
        HelloOverallWebSocketMessage helloOverallWebSocketMessage = new HelloOverallWebSocketMessage();
        helloOverallWebSocketMessage.setType("hello");
        HelloWebSocketMessage helloWebSocketMessage = new HelloWebSocketMessage();
        helloWebSocketMessage.setVersion("1.0");
        AuthWebSocketMessage authWebSocketMessage = new AuthWebSocketMessage();
        authWebSocketMessage.setUrl(ApiUtils.getUrlForExternalServerAuthBackend(userEntity.getBaseUrl()));
        AuthParametersWebSocketMessage authParametersWebSocketMessage = new AuthParametersWebSocketMessage();
        authParametersWebSocketMessage.setTicket(ticket);
        authParametersWebSocketMessage.setUserid(userEntity.getUserId());
        authWebSocketMessage.setAuthParametersWebSocketMessage(authParametersWebSocketMessage);
        helloWebSocketMessage.setAuthWebSocketMessage(authWebSocketMessage);
        return helloOverallWebSocketMessage;
    }

    public HelloOverallWebSocketMessage getAssembledHelloModelForResume(String resumeId) {
        HelloOverallWebSocketMessage helloOverallWebSocketMessage = new HelloOverallWebSocketMessage();
        helloOverallWebSocketMessage.setType("hello");
        HelloWebSocketMessage helloWebSocketMessage = new HelloWebSocketMessage();
        helloWebSocketMessage.setVersion("1.0");
        helloWebSocketMessage.setResumeid(resumeId);
        return helloOverallWebSocketMessage;
    }

    public RoomOverallWebSocketMessage getAssembledJoinOrLeaveRoomModel(String roomId, String sessionId) {
        RoomOverallWebSocketMessage roomOverallWebSocketMessage = new RoomOverallWebSocketMessage();
        roomOverallWebSocketMessage.setType("room");
        RoomWebSocketMessage roomWebSocketMessage = new RoomWebSocketMessage();
        roomWebSocketMessage.setRoomId(roomId);
        roomWebSocketMessage.setSessiondId(sessionId);
        return roomOverallWebSocketMessage;
    }

    public RequestOfferOverallWebSocketMessage getAssembledRequestOfferModel(String sessionId, String roomType) {
        RequestOfferOverallWebSocketMessage requestOfferOverallWebSocketMessage = new RequestOfferOverallWebSocketMessage();
        requestOfferOverallWebSocketMessage.setType("message");

        RequestOfferSignalingMessage requestOfferSignalingMessage = new RequestOfferSignalingMessage();

        RecipientWebSocketMessage recipientWebSocketMessage = new RecipientWebSocketMessage();
        recipientWebSocketMessage.setType("session");
        recipientWebSocketMessage.setSessionId(sessionId);
        requestOfferSignalingMessage.setRecipientWebSocketMessage(recipientWebSocketMessage);

        SignalingDataWebSocketMessageForOffer signalingDataWebSocketMessageForOffer = new SignalingDataWebSocketMessageForOffer();
        signalingDataWebSocketMessageForOffer.setRoomType(roomType);
        signalingDataWebSocketMessageForOffer.setType("requestoffer");
        requestOfferSignalingMessage.setSignalingDataWebSocketMessageForOffer(signalingDataWebSocketMessageForOffer);

        requestOfferOverallWebSocketMessage.setRequestOfferOverallWebSocketMessage(requestOfferSignalingMessage);
        return requestOfferOverallWebSocketMessage;
    }

    public CallOverallWebSocketMessage getAssembledCallMessageModel(NCMessageWrapper ncMessageWrapper) {
        CallOverallWebSocketMessage callOverallWebSocketMessage = new CallOverallWebSocketMessage();
        callOverallWebSocketMessage.setType("message");

        CallWebSocketMessage callWebSocketMessage = new CallWebSocketMessage();

        RecipientWebSocketMessage recipientWebSocketMessage = new RecipientWebSocketMessage();
        recipientWebSocketMessage.setType("session");
        recipientWebSocketMessage.setSessionId(ncMessageWrapper.getSignalingMessage().getTo());
        callWebSocketMessage.setRecipientWebSocketMessage(recipientWebSocketMessage);
        callWebSocketMessage.setNcMessageWrapper(ncMessageWrapper);

        callOverallWebSocketMessage.setCallWebSocketMessage(callWebSocketMessage);
        return callOverallWebSocketMessage;
    }
}