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#include "NetworkSession.hh"

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#include "Engine.hh"

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#include <cassert>

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NetworkSession::NetworkSession (uint64_t magic) :

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    magic(magic), tcp_srv(NULL), udp_srv(NULL), udp_client(NULL) {

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    // nothing

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}

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void NetworkSession::listen (const NetworkAddress &addr) {

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    assert(tcp_srv == NULL && udp_srv == NULL);

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    // create TCP/UDP servers

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    tcp_srv = new NetworkTCPServer(addr);

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    udp_srv = new NetworkUDP(addr);

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    // connect signals

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    slots.connect(tcp_srv->sig_client(), this, &NetworkSession::on_tcp_client);

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    slots.connect(udp_srv->sig_packet(), this, &NetworkSession::on_udp_packet);

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}

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NetworkNode *NetworkSession::build_node (NetworkTCPTransport *tcp, NetworkUDP *udp, const NetworkAddress &addr, enum NetworkNodeType type) {

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    // XXX: unused

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    (void) type;

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    // create node

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    return new NetworkNode(*this, tcp, udp, addr);

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}

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NetworkNode* NetworkSession::connect (const NetworkAddress &addr) {

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    // XXX: only one connect

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    assert(!udp_client);

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    // connect TCP

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    NetworkTCPClient *tcp_client = new NetworkTCPClient(addr);

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    // create UDP socket on same address

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    udp_client = new NetworkUDP(tcp_client->getLocalAddress());

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    // build client

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    NetworkNode *client_node = build_node(tcp_client, udp_client, addr, NETWORK_NODE_CLIENT_SERVER);

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    // add to nodes

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    nodes[addr] = client_node;

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    // connect signals

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    slots.connect(udp_client->sig_packet(), this, &NetworkSession::on_udp_packet);

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    // return the "server" node

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    return client_node;

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}

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void NetworkSession::handle_disconnect (NetworkNode *node) {

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    // remove from nodes

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    nodes.erase(node->getRemoteAddress());

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}

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void NetworkSession::handle_message (NetworkPacket &pkt, NetworkNode *node) {

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    // read the channel id

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    NetworkChannelID channel_id = pkt.read_uint16();

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    // fire signal

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    _map_sig_chan_message[channel_id](pkt, node);

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}

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void NetworkSession::on_tcp_client (NetworkTCPTransport *tcp_client) {

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    // get remote address manually, because NetworkTCPServer doesn't pass it in to us

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    NetworkAddress addr = tcp_client->getRemoteAddress();

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    // build client

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    NetworkNode *client_node = build_node(tcp_client, udp_srv, addr, NETWORK_NODE_SERVER_CLIENT);

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    // add to nodes

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    nodes[addr] = client_node;

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    // fire signals

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    _sig_node_connected(client_node);

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}

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void NetworkSession::on_udp_packet (NetworkPacket &pkt, const NetworkAddress &addr) {

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    NetworkNode *node = nodes[addr];

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    // drop from unknown sources

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    if (!node) {

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        Engine::log(WARN, "net_session.on_udp_packet") << "dropping unsolicted UDP packet from " << addr;

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        return;

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    }

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    // handle

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    handle_message(pkt, node);

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}

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void NetworkSession::send_all (NetworkChannelID channel_id, const NetworkPacket &pkt, bool reliable) {

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    send_all_except(channel_id, pkt, NULL, reliable);

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}

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void NetworkSession::send_all_except (NetworkChannelID channel_id, const NetworkPacket &pkt, const NetworkNode *node, bool reliable) {

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    for (std::map<NetworkAddress, NetworkNode*>::iterator it = nodes.begin(); it != nodes.end(); it++) {

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        if (it->second == node)

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            continue;

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        it->second->send(channel_id, pkt, reliable);

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    }

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}