#pragma once

#include <stdexcept>
#include <unordered_map>
#include <functional>
#include <string>
#include <memory>
#include <thread>
#include <mutex>
#include "IpAddress.hpp"
#include "../types.hpp"
#include "../utils.hpp"

namespace sibs
{
    class ConnectionException : public std::runtime_error
    {
    public:
        ConnectionException(const std::string &errMsg) : std::runtime_error(errMsg) {}
    };
    
    class SendException : public std::runtime_error
    {
    public:
        SendException(const std::string &errMsg) : std::runtime_error(errMsg) {}
    };
    
    
    enum class PubSubConnectResult
    {
        OK,
        ERROR
    };
    
    using PubSubConnectCallback = std::function<void(PubSubConnectResult result, const std::string &resultStr)>;
    using PubSubReceiveDataCallback = std::function<void(const void *data, const usize size)>;
    
    struct DirectConnectionPeer
    {
        int socket;
        PubSubReceiveDataCallback receiveDataCallbackFunc;
    };
    
    class DirectConnections
    {
        DISABLE_COPY(DirectConnections)
        friend class BootstrapNode;
    public:
        DirectConnections(u16 port = 27137);
        ~DirectConnections();
        
        // Throws ConnectionException on error
        std::shared_ptr<DirectConnectionPeer> connect(const Ipv4 &address, PubSubReceiveDataCallback receiveDataCallbackFunc);
        // Throws SendException on error
        void send(const std::shared_ptr<DirectConnectionPeer> &peer, const void *data, const usize size);
    protected:
        int createSocket(const Ipv4 &addressToBind, bool rendezvous, bool reuseAddr);
    private:
        void receiveData();
        bool receiveDataFromPeer(const int socket, char *output);
    private:
        u16 port;
        int eid;
        std::unordered_map<int, std::shared_ptr<DirectConnectionPeer>> peers;
        std::thread receiveDataThread;
        std::mutex peersMutex;
        bool alive;
    };
}