/***
    This file is part of snapcast
    Copyright (C) 2014-2019  Johannes Pohl

    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/>.
***/

#ifndef CONTROLLER_H
#define CONTROLLER_H

#include "decoder/decoder.hpp"
#include "message/message.h"
#include "message/serverSettings.h"
#include "message/streamTags.h"
#include "player/pcm_device.hpp"
#include <atomic>
#include <thread>
#ifdef HAS_ALSA
#include "player/alsa_player.hpp"
#elif HAS_OPENSL
#include "player/opensl_player.hpp"
#elif HAS_COREAUDIO
#include "player/coreaudio_player.hpp"
#endif
#include "client_connection.hpp"
#include "metadata.hpp"
#include "stream.hpp"


/// Forwards PCM data to the audio player
/**
 * Sets up a connection to the server (using ClientConnection)
 * Sets up the audio decoder and player.
 * Decodes audio (message_type::kWireChunk) and feeds PCM to the audio stream buffer
 * Does timesync with the server
 */
class Controller : public MessageReceiver
{
public:
    Controller(const std::string& clientId, size_t instance, std::shared_ptr<MetadataAdapter> meta);
    void start(const PcmDevice& pcmDevice, const std::string& host, size_t port, int latency);
    void stop();

    /// Implementation of MessageReceiver.
    /// ClientConnection passes messages from the server through these callbacks
    void onMessageReceived(ClientConnection* connection, const msg::BaseMessage& baseMessage, char* buffer) override;

    /// Implementation of MessageReceiver.
    /// Used for async exception reporting
    void onException(ClientConnection* connection, shared_exception_ptr exception) override;

private:
    void worker();
    bool sendTimeSyncMessage(long after = 1000);
    std::string hostId_;
    std::string meta_callback_;
    size_t instance_;
    std::atomic<bool> active_;
    std::thread controllerThread_;
    SampleFormat sampleFormat_;
    PcmDevice pcmDevice_;
    int latency_;
    std::unique_ptr<ClientConnection> clientConnection_;
    std::shared_ptr<Stream> stream_;
    std::unique_ptr<Decoder> decoder_;
    std::unique_ptr<Player> player_;
    std::shared_ptr<MetadataAdapter> meta_;
    std::shared_ptr<msg::ServerSettings> serverSettings_;
    std::shared_ptr<msg::StreamTags> streamTags_;
    std::shared_ptr<msg::CodecHeader> headerChunk_;
    std::mutex receiveMutex_;

    shared_exception_ptr async_exception_;
};


#endif