#ifndef RTC_CHANNEL_H

#define RTC_CHANNEL_H

#include "common.hpp"

#include <atomic>

#include <functional>

namespace rtc {

namespace impl {

struct Channel;

}

class RTC_CPP_EXPORT Channel : private CheshireCat<impl::Channel> {

virtual ~Channel();

virtual void close() = 0;

virtual bool send(message_variant data) = 0; // returns false if buffered

virtual bool send(const byte *data, size_t size) = 0;

virtual bool isOpen() const = 0;

virtual bool isClosed() const = 0;

virtual size_t maxMessageSize() const; // max message size in a call to send

virtual size_t bufferedAmount() const; // total size buffered to send

void onOpen(std::function<void()> callback);

void onClosed(std::function<void()> callback);

void onError(std::function<void(string error)> callback);

void onMessage(std::function<void(message_variant data)> callback);

void onMessage(std::function<void(binary data)> binaryCallback,

std::function<void(string data)> stringCallback);

void onBufferedAmountLow(std::function<void()> callback);

void setBufferedAmountLowThreshold(size_t amount);

void resetCallbacks();

// Extended API

optional<message_variant> receive(); // only if onMessage unset

optional<message_variant> peek(); // only if onMessage unset

size_t availableAmount() const; // total size available to receive

void onAvailable(std::function<void()> callback);

Channel(impl_ptr<impl::Channel> impl);

};

} // namespace rtc

#endif // RTC_CHANNEL_H