package eu.siacs.conversations.ui;

import android.content.Intent;
import android.databinding.DataBindingUtil;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.WindowManager;

import java.lang.ref.WeakReference;
import java.util.Arrays;

import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.databinding.ActivityRtpSessionBinding;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.xmpp.jingle.AbstractJingleConnection;
import eu.siacs.conversations.xmpp.jingle.JingleRtpConnection;
import eu.siacs.conversations.xmpp.jingle.RtpEndUserState;
import rocks.xmpp.addr.Jid;

import static java.util.Arrays.asList;

public class RtpSessionActivity extends XmppActivity implements XmppConnectionService.OnJingleRtpConnectionUpdate {

    public static final String EXTRA_WITH = "with";
    public static final String EXTRA_SESSION_ID = "session_id";

    public static final String ACTION_ACCEPT_CALL = "action_accept_call";
    public static final String ACTION_MAKE_VOICE_CALL = "action_make_voice_call";
    public static final String ACTION_MAKE_VIDEO_CALL = "action_make_video_call";

    private WeakReference<JingleRtpConnection> rtpConnectionReference;

    private ActivityRtpSessionBinding binding;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
                | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
                | WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON)
        ;
        Log.d(Config.LOGTAG, "RtpSessionActivity.onCreate()");
        this.binding = DataBindingUtil.setContentView(this, R.layout.activity_rtp_session);
        this.binding.rejectCall.setOnClickListener(this::rejectCall);
        this.binding.endCall.setOnClickListener(this::endCall);
        this.binding.acceptCall.setOnClickListener(this::acceptCall);
    }

    @Override
    public void onStart() {
        super.onStart();
        Log.d(Config.LOGTAG, "RtpSessionActivity.onStart()");
    }

    private void endCall(View view) {
        if (this.rtpConnectionReference == null) {
            final Intent intent = getIntent();
            final Account account = extractAccount(intent);
            final Jid with = Jid.of(intent.getStringExtra(EXTRA_WITH));
            xmppConnectionService.getJingleConnectionManager().retractSessionProposal(account, with.asBareJid());
            finish();
        } else {
            requireRtpConnection().endCall();
        }
    }

    private void rejectCall(View view) {
        requireRtpConnection().rejectCall();
        finish();
    }

    private void acceptCall(View view) {
        requireRtpConnection().acceptCall();
    }

    @Override
    protected void refreshUiReal() {

    }

    @Override
    public void onNewIntent(final Intent intent) {
        super.onNewIntent(intent);
        if (ACTION_ACCEPT_CALL.equals(intent.getAction())) {
            Log.d(Config.LOGTAG, "accepting through onNewIntent()");
            requireRtpConnection().acceptCall();
        }
    }

    @Override
    void onBackendConnected() {
        final Intent intent = getIntent();
        final Account account = extractAccount(intent);
        final Jid with = Jid.of(intent.getStringExtra(EXTRA_WITH));
        final String sessionId = intent.getStringExtra(EXTRA_SESSION_ID);
        if (sessionId != null) {
            initializeActivityWithRunningRapSession(account, with, sessionId);
            if (ACTION_ACCEPT_CALL.equals(intent.getAction())) {
                Log.d(Config.LOGTAG, "intent action was accept");
                requireRtpConnection().acceptCall();
            }
        } else if (asList(ACTION_MAKE_VIDEO_CALL, ACTION_MAKE_VOICE_CALL).contains(intent.getAction())) {
            xmppConnectionService.getJingleConnectionManager().proposeJingleRtpSession(account, with);
            binding.with.setText(account.getRoster().getContact(with).getDisplayName());
        }
    }


    private void initializeActivityWithRunningRapSession(final Account account, Jid with, String sessionId) {
        final WeakReference<JingleRtpConnection> reference = xmppConnectionService.getJingleConnectionManager()
                .findJingleRtpConnection(account, with, sessionId);
        if (reference == null || reference.get() == null) {
            finish();
            return;
        }
        this.rtpConnectionReference = reference;
        final RtpEndUserState currentState = requireRtpConnection().getEndUserState();
        if (currentState == RtpEndUserState.ENDED) {
            finish();
            return;
        }
        binding.with.setText(getWith().getDisplayName());
        updateStateDisplay(currentState);
        updateButtonConfiguration(currentState);
    }

    private void reInitializeActivityWithRunningRapSession(final Account account, Jid with, String sessionId) {
        runOnUiThread(() -> {
            initializeActivityWithRunningRapSession(account, with, sessionId);
        });
        final Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.putExtra(EXTRA_ACCOUNT, account.getJid().toEscapedString());
        intent.putExtra(EXTRA_WITH, with.toEscapedString());
        intent.putExtra(EXTRA_SESSION_ID, sessionId);
        setIntent(intent);
    }

    private void updateStateDisplay(final RtpEndUserState state) {
        switch (state) {
            case INCOMING_CALL:
                binding.status.setText(R.string.rtp_state_incoming_call);
                break;
            case CONNECTING:
                binding.status.setText(R.string.rtp_state_connecting);
                break;
            case CONNECTED:
                binding.status.setText(R.string.rtp_state_connected);
                break;
            case ACCEPTING_CALL:
                binding.status.setText(R.string.rtp_state_accepting_call);
                break;
            case ENDING_CALL:
                binding.status.setText(R.string.rtp_state_ending_call);
                break;
            case FINDING_DEVICE:
                binding.status.setText(R.string.rtp_state_finding_device);
                break;
            case RINGING:
                binding.status.setText(R.string.rtp_state_ringing);
        }
    }

    private void updateButtonConfiguration(final RtpEndUserState state) {
        if (state == RtpEndUserState.INCOMING_CALL) {
            this.binding.rejectCall.show();
            this.binding.endCall.hide();
            this.binding.acceptCall.show();
        } else if (state == RtpEndUserState.ENDING_CALL) {
            this.binding.rejectCall.hide();
            this.binding.endCall.hide();
            this.binding.acceptCall.hide();
        } else {
            this.binding.rejectCall.hide();
            this.binding.endCall.show();
            this.binding.acceptCall.hide();
        }
    }

    private Contact getWith() {
        final AbstractJingleConnection.Id id = requireRtpConnection().getId();
        final Account account = id.account;
        return account.getRoster().getContact(id.with);
    }

    private JingleRtpConnection requireRtpConnection() {
        final JingleRtpConnection connection = this.rtpConnectionReference != null ? this.rtpConnectionReference.get() : null;
        if (connection == null) {
            throw new IllegalStateException("No RTP connection found");
        }
        return connection;
    }

    @Override
    public void onJingleRtpConnectionUpdate(Account account, Jid with, final String sessionId, RtpEndUserState state) {
        Log.d(Config.LOGTAG,"onJingleRtpConnectionUpdate("+state+")");
        if (with.isBareJid()) {
            updateRtpSessionProposalState(with, state);
            return;
        }
        if (this.rtpConnectionReference == null) {
            //this happens when going from proposed session to actual session
            reInitializeActivityWithRunningRapSession(account, with, sessionId);
            return;
        }
        final AbstractJingleConnection.Id id = requireRtpConnection().getId();
        if (account == id.account && id.with.equals(with) && id.sessionId.equals(sessionId)) {
            if (state == RtpEndUserState.ENDED) {
                finish();
                return;
            }
            runOnUiThread(() -> {
                updateStateDisplay(state);
                updateButtonConfiguration(state);
            });
        } else {
            Log.d(Config.LOGTAG, "received update for other rtp session");
        }
    }

    private void updateRtpSessionProposalState(Jid with, RtpEndUserState state) {
        final Intent intent = getIntent();
        final String intentExtraWith = intent == null ? null : intent.getStringExtra(EXTRA_WITH);
        if (intentExtraWith == null) {
            return;
        }
        if (Jid.ofEscaped(intentExtraWith).asBareJid().equals(with)) {
            runOnUiThread(() -> {
                updateStateDisplay(state);
                updateButtonConfiguration(state);
            });
        }
    }
}