// Copyright 2023 Dexter.Wan. All Rights Reserved. 
// EMail: 45141961@qq.com

#include "message.h"
#include <cstring>
#include <utility>

namespace mqtt {

/////////////////////////////////////////////////////////////////////////////

#if __cplusplus < 201703L
	constexpr int message::DFLT_QOS;
	constexpr bool message::DFLT_RETAINED;
#endif

const MQTTAsync_message message::DFLT_C_STRUCT = MQTTAsync_message_initializer;

// --------------------------------------------------------------------------

message::message() : msg_(DFLT_C_STRUCT)
{
}

message::message(string_ref topic, const void* payload, size_t len, int qos, bool retained,
				 const properties& props /*=properties()*/)
		: msg_(DFLT_C_STRUCT), topic_(std::move(topic))
{
	set_payload(payload, len);
	set_qos(qos);
	set_retained(retained);
	set_properties(props);
}

message::message(string_ref topic, binary_ref payload, int qos, bool retained,
				 const properties& props /*=properties()*/)
		: msg_(DFLT_C_STRUCT), topic_(std::move(topic))
{
	set_payload(std::move(payload));
	set_qos(qos);
	set_retained(retained);
	set_properties(props);
}

message::message(string_ref topic, const MQTTAsync_message& cmsg)
		: msg_(cmsg), topic_(std::move(topic)), props_(cmsg.properties)
{
	set_payload(cmsg.payload, cmsg.payloadlen);
	msg_.properties = props_.c_struct();
}

message::message(const message& other)
		: msg_(other.msg_), topic_(other.topic_), props_(other.props_)
{
	set_payload(other.payload_);
	msg_.properties = props_.c_struct();
}

message::message(message&& other)
		: msg_(other.msg_), topic_(std::move(other.topic_)),
			props_(std::move(other.props_))
{
	set_payload(std::move(other.payload_));
	other.msg_.payloadlen = 0;
	other.msg_.payload = nullptr;
	msg_.properties = props_.c_struct();
}

message& message::operator=(const message& rhs)
{
	if (&rhs != this) {
		msg_ = rhs.msg_;
		topic_ = rhs.topic_;
		set_payload(rhs.payload_);
		set_properties(rhs.props_);
	}
	return *this;
}

message& message::operator=(message&& rhs)
{
	if (&rhs != this) {
		msg_ = rhs.msg_;
		topic_ = std::move(rhs.topic_);
		set_payload(std::move(rhs.payload_));
		set_properties(std::move(rhs.props_));

		rhs.msg_ = DFLT_C_STRUCT;
	}
	return *this;
}

void message::clear_payload()
{
	payload_.reset();
	msg_.payload = nullptr;
	msg_.payloadlen = 0;
}

void message::set_payload(binary_ref payload)
{
	payload_ = std::move(payload);

	if (payload_.empty()) {
		msg_.payload = nullptr;
		msg_.payloadlen = 0;
	}
	else {
		msg_.payload = const_cast<binary_ref::value_type*>(payload_.data());
		msg_.payloadlen = int(payload_.length());
	}
}

/////////////////////////////////////////////////////////////////////////////
// end namespace mqtt
}