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#include "Server.hh"

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#include "Protocol.hh"

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#include "Config.hh"

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#include "../Engine.hh"

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#include "../Logger.hh"

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#include <cassert>

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NetworkServer::NetworkServer (GameState &state, const NetworkAddress &listen_addr) : 

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    state(state), netsession(NETWORK_MAGIC_ID), netobjs(netsession, NETCHAN_CORE) {

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    // connect slots

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    slots.connect(netsession.sig_node_connected(), this, &NetworkServer::on_node_connected);

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    // and then we listen

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    netsession.listen(listen_addr);

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    Engine::log(INFO, "server") << "running, listen_addr=" << listen_addr;

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}

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void NetworkServer::on_node_connected (NetworkNode *node) {

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    // create the player object (it logs it)

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    NetworkServerPlayer *player = new NetworkServerPlayer(*this, node);

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    // add to players

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    players.push_back(player);

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    // add to GameState

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    state.newPlayer(player);

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}

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void NetworkServer::handle_disconnect (NetworkServerPlayer *player) {

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    // remove from state

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    state.removePlayer(player);

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    // remove from list

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    players.remove(player);

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}

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NetworkServerPlayer::NetworkServerPlayer (NetworkServer &server, NetworkNode *node) : 

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    Player(server.state, Vector(PLAYER_INITIAL_X, PLAYER_INITIAL_Y), true), server(server), obj(server.netobjs), node(node) {

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    // log

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    Engine::log(INFO, "server_player.connected") << "node=" << node << ", obj=" << obj;

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    // messages

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    slots.connect(node->sig_disconnected(), this, &NetworkServerPlayer::on_disconnected);

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    slots.connect(obj.sig_message(NETMSG_CLIENT_INPUT), this, &NetworkServerPlayer::on_input);

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    // the initial NETMSG_PLAYER_HELLO

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    NetworkPacket hello_pkt;

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    hello_pkt.write_vector(position);

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    obj.send_to(node, NETMSG_SERVER_HELLO, hello_pkt, true);

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    // send other player objects

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    for (std::list<NetworkServerPlayer*>::iterator it = server.players.begin(); it != server.players.end(); it++) {

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        NetworkServerPlayer *player = *it;

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        NetworkPacket player_pkt;

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        // player is not in players list yet

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        assert(player != this);

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        player_pkt.write_vector(player->position);

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        player->obj.send_to(node, NETMSG_PLAYER_INFO, player_pkt, true);

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    }

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    // broadcast NETMSG_PLAYER_JOIN to all clients except current

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    obj.send_all_except(NETMSG_PLAYER_JOIN, hello_pkt, node, true);

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    // send terrain data...

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    send_terrain_data();

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}

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void NetworkServerPlayer::handleDig (Vector position, float radius) {

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    NetworkPacket pkt;

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    pkt.write_vector(position);

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    pkt.write_float32(radius);

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    Engine::log(INFO, "server_player.handle_dig") << "position=" << position << ", radius=" << radius;

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    // tell everyone... make this reliable... 

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    obj.send_all(NETMSG_PLAYER_DIG, pkt, true);

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    // and carry out the actual dig on the server as well

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    Player::handleDig(position, radius);

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}

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void NetworkServerPlayer::handleCreateProjectile (Weapon &weapon, Vector position, Vector velocity) {

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    Engine::log(INFO, "server_player.create_projectile") << /* "weapon=" << weapon << ", */ "position=" << position << ", velocity=" << velocity;

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    // create new NetworkServerProjectile object

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    new NetworkServerProjectile(server, position, velocity, weapon.getExplosionRadius(), weapon.getExpireTicks());

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}

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void NetworkServerPlayer::on_disconnected (void) {

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    NetworkPacket pkt;

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    Engine::log(INFO, "server_player.disconnected") << "node=" << node << ", obj=" << obj;

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    // remove from server

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    server.handle_disconnect(this);

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    // tell other clients

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    obj.send_all(NETMSG_PLAYER_QUIT, pkt, true);

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    // free

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//    delete this;

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}

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void NetworkServerPlayer::on_input (NetworkNode *src, NetworkPacketInput &pkt) {

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    // sanity-check, other players shouldn't move

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    if (src != node) {

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        Engine::log(WARN, "server_player.on_input") << "packet from wrong src=" << src << ", node=" << node;

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        return;

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    }

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    PlayerInput input = pkt.read_uint16();

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    Engine::log(INFO, "server_player.on_input") << "player=" << obj << ", old_pos=" << position << ", input=" << input;

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    // apply input

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    handleInput(input);  

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    // send position update

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    send_position_update();

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}

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void NetworkServerPlayer::send_terrain_data (void) {

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    Terrain &terrain = server.state.world;

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    uint32_t map_w = terrain.terrain.size();

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    uint32_t map_h = terrain.terrain[0].size();

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    // allocate our packet...

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    BigNetworkPacket pkt (NETWORK_SESSION_HEADER_SIZE + 2 * sizeof(uint32_t) + map_w * map_h);

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    // write netsession header

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    node->write_packet_header(pkt, NETCHAN_TERRAIN_ARRAY);

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    // write terrain dimensions

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    pkt.write_uint32(map_w);

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    pkt.write_uint32(map_h);

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    // write out terrain data

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    for (int x = 0; x < map_w; x++) {

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        for (int y = 0; y < map_h; y++) {

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            pkt.write_uint8((uint8_t) terrain.terrain[x][y]);

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        }

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    }

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    // send

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    node->send_raw(pkt, true);

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}

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void NetworkServerPlayer::send_position_update (void) {

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    NetworkPacket pkt;

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    int flags = (inAir ? NETWORK_PHYSICS_INAIR : 0) | (facingRight ? NETWORK_PHYSICS_FACE_RIGHT : 0);

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    pkt.write_vector(position);

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    pkt.write_vector(velocity);

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    pkt.write_uint8(flags);

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    pkt.write_float32(aim);

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    Engine::log(INFO, "server_player.send_position_update") << "obj=" << obj << " -> " << position << "+" << velocity << " [" << flags << "]";

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    obj.send_all(NETMSG_PLAYER_POSITION, pkt, false);

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}

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/* 

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 * NetworkServerProjectile

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 */

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NetworkServerProjectile::NetworkServerProjectile (NetworkServer &server, Vector position, Vector velocity, 

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        float explosionRadius, TickCount age) :

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    Projectile(server.state, position, velocity, true, explosionRadius, age), server(server), obj(server.netobjs)

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{

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    NetworkPacket pkt;

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    pkt.write_vector(position);

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    pkt.write_vector(velocity);

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    pkt.write_float32(explosionRadius);

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    obj.send_all(NETMSG_PROJECTILE_CREATE, pkt, true);

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}

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