#include "connectionbase.h"

#include <stdexcept>

#include <iostream>

void ConnectionBase::start_recv() {
	request_data(4);
}

void ConnectionBase::got_data(uint8_t* data, std::size_t bytes) {
	if(pending_size == 0) {
		if(bytes != 4) {
			throw std::runtime_error("Deserialization header error.");
		}
		
		uint16_t* header = (uint16_t*)data;
		
		pending_type = (Message::Type)header[0];
		pending_size = (std::size_t)header[1];
		
		if(pending_size) {
			request_data(pending_size);
			return;
		}
		
		bytes = 0;
	}
	
	if(bytes != pending_size) {
		std::cout << "Bytes: " << bytes << "  Pending size: " << pending_size << std::endl;
		throw std::runtime_error("Deserialization attempted with incomplete data.");
		// TODO: Calling got_data() with incomplete data should be allowed.
	}
	
	pending_size = 0;
	
	Message::p m;
	
	switch(pending_type) {
		case Message::Types::Hello:
			m = make_shared<Message::Hello>();
			break;
		
		case Message::Types::Login:
			m = make_shared<Message::Login>();
			break;
		
		case Message::Types::LoginResponse:
			m = make_shared<Message::LoginResponse>();
			break;
		
		case Message::Types::GameStart:
			m = make_shared<Message::GameStart>();
			break;
		
		case Message::Types::Ready:
			m = make_shared<Message::Ready>();
			break;
		
		case Message::Types::RoundStart:
			m = make_shared<Message::RoundStart>();
			break;
		
		case Message::Types::RoundState:
			m = make_shared<Message::RoundState>();
			break;
		
		case Message::Types::RoundAction:
			m = make_shared<Message::RoundAction>();
			break;
			
		case Message::Types::RoundEnd:
			m = make_shared<Message::RoundEnd>();
			break;
		
		default:
			throw std::runtime_error("Deserialization attempted on unknown message type.");
	}
	
	if(bytes) {
		m->deserialize(data, bytes);
	}
	
	got_message(m);
}

void ConnectionBase::send(const Message::p& msg) {
	uint16_t* header = new uint16_t[2];
	
	std::pair<uint8_t*, std::size_t> smsg = msg->serialize();
	
	header[0] = uint16_t(msg->type);
	header[1] = uint16_t(smsg.second);
	
	write_data((uint8_t*)header, 4);
	if(smsg.second) {
		write_data(smsg.first, smsg.second);
	}
}

ConnectionBase::ConnectionBase() {
	pending_size = 0;
}

ConnectionBase::~ConnectionBase() {
	std::cout << "Connection destroyed." << std::endl;
}