#include "game.hh"

namespace game
{
    VARP(minradarscale, 0, 384, 10000);
    VARP(maxradarscale, 1, 1024, 10000);
    VARP(radarteammates, 0, 1, 1);
    FVARP(minimapalpha, 0, 1, 1);

    float calcradarscale()
    {
        return clamp(max(minimapradius.x, minimapradius.y)/3, float(minradarscale), float(maxradarscale));
    }

    void drawminimap(gameent *d, float x, float y, float s)
    {
        vec pos = vec(d->o).sub(minimapcenter).mul(minimapscale).add(0.5f), dir;
        vecfromyawpitch(camera1->yaw, 0, 1, 0, dir);
        float scale = calcradarscale();
        gle::defvertex(2);
        gle::deftexcoord0();
        gle::begin(GL_TRIANGLE_FAN);
        loopi(16)
        {
            vec v = vec(0, -1, 0).rotate_around_z(i/16.0f*2*M_PI);
            gle::attribf(x + 0.5f*s*(1.0f + v.x), y + 0.5f*s*(1.0f + v.y));
            vec tc = vec(dir).rotate_around_z(i/16.0f*2*M_PI);
            gle::attribf(1.0f - (pos.x + tc.x*scale*minimapscale.x), pos.y + tc.y*scale*minimapscale.y);
        }
        gle::end();
    }

    void setradartex()
    {
        settexture("media/interface/radar/radar.png", 3);
    }

    void drawradar(float x, float y, float s)
    {
        gle::defvertex(2);
        gle::deftexcoord0();
        gle::begin(GL_TRIANGLE_STRIP);
        gle::attribf(x,   y);   gle::attribf(0, 0);
        gle::attribf(x+s, y);   gle::attribf(1, 0);
        gle::attribf(x,   y+s); gle::attribf(0, 1);
        gle::attribf(x+s, y+s); gle::attribf(1, 1);
        gle::end();
    }

    void drawteammate(gameent *d, float x, float y, float s, gameent *o, float scale, float blipsize = 1)
    {
        vec dir = d->o;
        dir.sub(o->o).div(scale);
        float dist = dir.magnitude2(), maxdist = 1 - 0.05f - 0.05f;
        if(dist >= maxdist) dir.mul(maxdist/dist);
        dir.rotate_around_z(-camera1->yaw*RAD);
        float bs = 0.06f*blipsize*s,
              bx = x + s*0.5f*(1.0f + dir.x),
              by = y + s*0.5f*(1.0f + dir.y);
        vec v(-0.5f, -0.5f, 0);
        v.rotate_around_z((90+o->yaw-camera1->yaw)*RAD);
        gle::attribf(bx + bs*v.x, by + bs*v.y); gle::attribf(0, 0);
        gle::attribf(bx + bs*v.y, by - bs*v.x); gle::attribf(1, 0);
        gle::attribf(bx - bs*v.x, by - bs*v.y); gle::attribf(1, 1);
        gle::attribf(bx - bs*v.y, by + bs*v.x); gle::attribf(0, 1);
    }

    void setbliptex(int team, const char *type = "")
    {
        defformatstring(blipname, "media/interface/radar/blip%s%s.png", teamblipcolor[validteam(team) ? team : 0], type);
        settexture(blipname, 3);
    }

    void drawplayerblip(gameent *d, float x, float y, float s, float blipsize = 1)
    {
        if(d->state != CS_ALIVE && d->state != CS_DEAD) return;
        float scale = calcradarscale();
        setbliptex(d->team, d->state == CS_DEAD ? "_dead" : "_alive");
        gle::defvertex(2);
        gle::deftexcoord0();
        gle::begin(GL_QUADS);
        drawteammate(d, x, y, s, d, scale, blipsize);
        gle::end();
    }

    void drawteammates(gameent *d, float x, float y, float s)
    {
        if(!radarteammates) return;
        float scale = calcradarscale();
        int alive = 0, dead = 0;
        loopv(players)
        {
            gameent *o = players[i];
            if(o != d && o->state == CS_ALIVE && o->team == d->team)
            {
                if(!alive++)
                {
                    setbliptex(d->team, "_alive");
                    gle::defvertex(2);
                    gle::deftexcoord0();
                    gle::begin(GL_QUADS);
                }
                drawteammate(d, x, y, s, o, scale);
            }
        }
        if(alive) gle::end();
        loopv(players)
        {
            gameent *o = players[i];
            if(o != d && o->state == CS_DEAD && o->team == d->team)
            {
                if(!dead++)
                {
                    setbliptex(d->team, "_dead");
                    gle::defvertex(2);
                    gle::deftexcoord0();
                    gle::begin(GL_QUADS);
                }
                drawteammate(d, x, y, s, o, scale);
            }
        }
        if(dead) gle::end();
    }

    clientmode *cmode = NULL;

    void setclientmode()
    {
        cmode = NULL;
    }

    bool senditemstoserver = false, sendcrc = false; // after a map change, since server doesn't have map data
    int lastping = 0;

    bool connected = false, remote = false, demoplayback = false, gamepaused = false;
    int sessionid = 0, gamespeed = 100;
    string servdesc = "", servauth = "";

    VARP(deadpush, 1, 2, 20);

    void sendmapinfo()
    {
        if(!connected) return;
        sendcrc = true;
        senditemstoserver = true;
    }

    void writeclientinfo(stream *f)
    {
        f->printf("name %s\n", escapestring(player1->name));
    }

    bool allowedittoggle()
    {
        if(editmode) return true;
        if(isconnected() && multiplayer(false) && !m_edit)
        {
            conoutf(CON_ERROR, "editing in multiplayer requires edit mode");
            return false;
        }
        return execidentbool("allowedittoggle", true);
    }

    void edittoggled(bool on)
    {
        addmsg(N_EDITMODE, "ri", on ? 1 : 0);
        if(player1->state==CS_DEAD) deathstate(player1, true);
        disablezoom();
        player1->suicided = player1->respawned = -2;
        checkfollow();
    }

    string clientmap = "";

    void changemapserv(const char *name, int mode)        // forced map change from the server
    {
        if(editmode) toggleedit();
        if((m_edit && !name[0]) || !load_world(name))
        {
            emptymap(0, true, name);
            senditemstoserver = false;
        }
        startgame();
    }


    void changemap(const char *name, int mode) // request map change, server may ignore
    {
        server::forcemap(name, mode);
        if(!isconnected()) localconnect();
    }
    void changemap(const char *name)
    {
        changemap(name, 0);
    }
    ICOMMAND(map, "s", (char *name), changemap(name));

    void forceedit(const char *name)
    {
        changemap(name, 0);
    }

    void newmap(int size)
    {
        addmsg(N_NEWMAP, "ri", size);
    }

    int needclipboard = -1;

    void sendclipboard()
    {
        uchar *outbuf = NULL;
        int inlen = 0, outlen = 0;
        if(!packeditinfo(localedit, inlen, outbuf, outlen))
        {
            outbuf = NULL;
            inlen = outlen = 0;
        }
        packetbuf p(16 + outlen, ENET_PACKET_FLAG_RELIABLE);
        putint(p, N_CLIPBOARD);
        putint(p, inlen);
        putint(p, outlen);
        if(outlen > 0) p.put(outbuf, outlen);
        sendclientpacket(p.finalize(), 1);
        needclipboard = -1;
    }

    void edittrigger(const selinfo &sel, int op, int arg1, int arg2, int arg3, const VSlot *vs)
    {
        if(m_edit) switch(op)
        {
            case EDIT_FLIP:
            case EDIT_COPY:
            case EDIT_PASTE:
            case EDIT_DELCUBE:
            {
                switch(op)
                {
                    case EDIT_COPY: needclipboard = 0; break;
                    case EDIT_PASTE:
                        if(needclipboard > 0)
                        {
                            c2sinfo(true);
                            sendclipboard();
                        }
                        break;
                }
                addmsg(N_EDITF + op, "ri9i4",
                   sel.o.x, sel.o.y, sel.o.z, sel.s.x, sel.s.y, sel.s.z, sel.grid, sel.orient,
                   sel.cx, sel.cxs, sel.cy, sel.cys, sel.corner);
                break;
            }
            case EDIT_ROTATE:
            {
                addmsg(N_EDITF + op, "ri9i5",
                   sel.o.x, sel.o.y, sel.o.z, sel.s.x, sel.s.y, sel.s.z, sel.grid, sel.orient,
                   sel.cx, sel.cxs, sel.cy, sel.cys, sel.corner,
                   arg1);
                break;
            }
            case EDIT_MAT:
            case EDIT_FACE:
            {
                addmsg(N_EDITF + op, "ri9i6",
                   sel.o.x, sel.o.y, sel.o.z, sel.s.x, sel.s.y, sel.s.z, sel.grid, sel.orient,
                   sel.cx, sel.cxs, sel.cy, sel.cys, sel.corner,
                   arg1, arg2);
                break;
            }
            case EDIT_TEX:
            {
                int tex1 = shouldpacktex(arg1);
                if(addmsg(N_EDITF + op, "ri9i6",
                    sel.o.x, sel.o.y, sel.o.z, sel.s.x, sel.s.y, sel.s.z, sel.grid, sel.orient,
                    sel.cx, sel.cxs, sel.cy, sel.cys, sel.corner,
                    tex1 ? tex1 : arg1, arg2))
                {
                    messages.pad(2);
                    int offset = messages.length();
                    if(tex1) packvslot(messages, arg1);
                    *(ushort *)&messages[offset-2] = lilswap(ushort(messages.length() - offset));
                }
                break;
            }
            case EDIT_REPLACE:
            {
                int tex1 = shouldpacktex(arg1), tex2 = shouldpacktex(arg2);
                if(addmsg(N_EDITF + op, "ri9i7",
                    sel.o.x, sel.o.y, sel.o.z, sel.s.x, sel.s.y, sel.s.z, sel.grid, sel.orient,
                    sel.cx, sel.cxs, sel.cy, sel.cys, sel.corner,
                    tex1 ? tex1 : arg1, tex2 ? tex2 : arg2, arg3))
                {
                    messages.pad(2);
                    int offset = messages.length();
                    if(tex1) packvslot(messages, arg1);
                    if(tex2) packvslot(messages, arg2);
                    *(ushort *)&messages[offset-2] = lilswap(ushort(messages.length() - offset));
                }
                break;
            }
            case EDIT_CALCLIGHT:
            case EDIT_REMIP:
            {
                addmsg(N_EDITF + op, "r");
                break;
            }
            case EDIT_VSLOT:
            {
                if(addmsg(N_EDITF + op, "ri9i6",
                    sel.o.x, sel.o.y, sel.o.z, sel.s.x, sel.s.y, sel.s.z, sel.grid, sel.orient,
                    sel.cx, sel.cxs, sel.cy, sel.cys, sel.corner,
                    arg1, arg2))
                {
                    messages.pad(2);
                    int offset = messages.length();
                    packvslot(messages, vs);
                    *(ushort *)&messages[offset-2] = lilswap(ushort(messages.length() - offset));
                }
                break;
            }
            case EDIT_UNDO:
            case EDIT_REDO:
            {
                uchar *outbuf = NULL;
                int inlen = 0, outlen = 0;
                if(packundo(op, inlen, outbuf, outlen))
                {
                    if(addmsg(N_EDITF + op, "ri2", inlen, outlen)) messages.put(outbuf, outlen);
                    delete[] outbuf;
                }
                break;
            }
        }
    }

    void printvar(gameent *d, ident *id)
    {
        if(id) switch(id->type)
        {
            case ID_VAR:
            {
                int val = *id->storage.i;
                string str;
                if(val < 0)
                    formatstring(str, "%d", val);
                else if(id->flags&IDF_HEX && id->maxval==0xFFFFFF)
                    formatstring(str, "0x%.6X (%d, %d, %d)", val, (val>>16)&0xFF, (val>>8)&0xFF, val&0xFF);
                else
                    formatstring(str, id->flags&IDF_HEX ? "0x%X" : "%d", val);
                conoutf("%s set map var \"%s\" to %s", colorname(d), id->name, str);
                break;
            }
            case ID_FVAR:
                conoutf("%s set map var \"%s\" to %s", colorname(d), id->name, floatstr(*id->storage.f));
                break;
            case ID_SVAR:
                conoutf("%s set map var \"%s\" to \"%s\"", colorname(d), id->name, *id->storage.s);
                break;
        }
    }

    void vartrigger(ident *id)
    {
        if(!m_edit) return;
        switch(id->type)
        {
            case ID_VAR:
                addmsg(N_EDITVAR, "risi", ID_VAR, id->name, *id->storage.i);
                break;

            case ID_FVAR:
                addmsg(N_EDITVAR, "risf", ID_FVAR, id->name, *id->storage.f);
                break;

            case ID_SVAR:
                addmsg(N_EDITVAR, "riss", ID_SVAR, id->name, *id->storage.s);
                break;
            default: return;
        }
        printvar(player1, id);
    }

    void pausegame(bool val)
    {
        if(!connected) return;
        if(!remote) server::forcepaused(val);
        else addmsg(N_PAUSEGAME, "ri", val ? 1 : 0);
    }
    ICOMMAND(pausegame, "i", (int *val), pausegame(*val > 0));
    ICOMMAND(paused, "iN$", (int *val, int *numargs, ident *id),
    {
        if(*numargs > 0) pausegame(clampvar(id, *val, 0, 1) > 0);
        else if(*numargs < 0) intret(gamepaused ? 1 : 0);
        else printvar(id, gamepaused ? 1 : 0);
    });

    bool ispaused() { return gamepaused; }

    bool allowmouselook() { return !gamepaused || !remote || m_edit; }

    void changegamespeed(int val)
    {
        if(!connected) return;
        if(!remote) server::forcegamespeed(val);
        else addmsg(N_GAMESPEED, "ri", val);
    }
    ICOMMAND(gamespeed, "iN$", (int *val, int *numargs, ident *id),
    {
        if(*numargs > 0) changegamespeed(clampvar(id, *val, 10, 1000));
        else if(*numargs < 0) intret(gamespeed);
        else printvar(id, gamespeed);
    });
    ICOMMAND(prettygamespeed, "i", (), result(tempformatstring("%d.%02dx", gamespeed/100, gamespeed%100)));

    int scaletime(int t) { return t*gamespeed; }

    // collect c2s messages conveniently
    vector<uchar> messages;
    int messagecn = -1, messagereliable = false;

    bool addmsg(int type, const char *fmt, ...)
    {
        if(!connected) return false;
        static uchar buf[MAXTRANS];
        ucharbuf p(buf, sizeof(buf));
        putint(p, type);
        int numi = 1, numf = 0, nums = 0;
        bool reliable = false;
        if(fmt)
        {
            va_list args;
            va_start(args, fmt);
            while(*fmt) switch(*fmt++)
            {
                case 'r': reliable = true; break;
                case 'c':
                {
                    break;
                }
                case 'v':
                {
                    int n = va_arg(args, int);
                    int *v = va_arg(args, int *);
                    loopi(n) putint(p, v[i]);
                    numi += n;
                    break;
                }

                case 'i':
                {
                    int n = isdigit(*fmt) ? *fmt++-'0' : 1;
                    loopi(n) putint(p, va_arg(args, int));
                    numi += n;
                    break;
                }
                case 'f':
                {
                    int n = isdigit(*fmt) ? *fmt++-'0' : 1;
                    loopi(n) putfloat(p, (float)va_arg(args, double));
                    numf += n;
                    break;
                }
                case 's': sendstring(va_arg(args, const char *), p); nums++; break;
            }
            va_end(args);
        }
        int num = nums || numf ? 0 : numi, msgsize = server::msgsizelookup(type);
        if(msgsize && num!=msgsize) { fatal("inconsistent msg size for %d (%d != %d)", type, num, msgsize); }
        if(reliable) messagereliable = true;
        messages.put(buf, p.length());
        return true;
    }

    void connectattempt(const char *name, const char *password, const ENetAddress &address)
    {
    }

    void connectfail()
    {
    }

    void gameconnect(bool _remote)
    {
        remote = _remote;
    }

    void gamedisconnect(bool cleanup)
    {
        if(remote) stopfollowing();
        connected = remote = false;
        player1->clientnum = -1;
        if(editmode) toggleedit();
        sessionid = 0;
        messages.setsize(0);
        messagereliable = false;
        messagecn = -1;
        player1->respawn();
        player1->lifesequence = 0;
        player1->state = CS_ALIVE;
        sendcrc = senditemstoserver = false;
        demoplayback = false;
        gamepaused = false;
        gamespeed = 100;
        clearclients(false);
        if(cleanup)
        {
            clientmap[0] = '\0';
        }
    }

    VARP(teamcolorchat, 0, 1, 1);
    const char *chatcolorname(gameent *d) { return teamcolorchat ? teamcolorname(d, NULL) : colorname(d); }

    void toserver(char *text) { conoutf(CON_CHAT, "%s:%s %s", chatcolorname(player1), teamtextcode[0], text); addmsg(N_TEXT, "rcs", player1, text); }
    COMMANDN(say, toserver, "C");

    void sayteam(char *text) { if(!m_teammode || !validteam(player1->team)) return; conoutf(CON_TEAMCHAT, "%s:%s %s", chatcolorname(player1), teamtextcode[player1->team], text); addmsg(N_SAYTEAM, "rcs", player1, text); }
    COMMAND(sayteam, "C");

    ICOMMAND(servcmd, "C", (char *cmd), addmsg(N_SERVCMD, "rs", cmd));

    static void sendposition(gameent *d, packetbuf &q)
    {
        putint(q, N_POS);
        putuint(q, d->clientnum);
        // 3 bits phys state, 1 bit life sequence, 2 bits move, 2 bits strafe
        uchar physstate = d->physstate | ((d->lifesequence&1)<<3) | ((d->move&3)<<4) | ((d->strafe&3)<<6);
        q.put(physstate);
        ivec o = ivec(vec(d->o.x, d->o.y, d->o.z-d->eyeheight).mul(DMF));
        uint vel = min(int(d->vel.magnitude()*DVELF), 0xFFFF), fall = min(int(d->falling.magnitude()*DVELF), 0xFFFF);
        // 3 bits position, 1 bit velocity, 3 bits falling, 1 bit material, 1 bit crouching
        uint flags = 0;
        if(o.x < 0 || o.x > 0xFFFF) flags |= 1<<0;
        if(o.y < 0 || o.y > 0xFFFF) flags |= 1<<1;
        if(o.z < 0 || o.z > 0xFFFF) flags |= 1<<2;
        if(vel > 0xFF) flags |= 1<<3;
        if(fall > 0)
        {
            flags |= 1<<4;
            if(fall > 0xFF) flags |= 1<<5;
            if(d->falling.x || d->falling.y || d->falling.z > 0) flags |= 1<<6;
        }
        if((lookupmaterial(d->feetpos())&MATF_CLIP) == MAT_GAMECLIP) flags |= 1<<7;
        if(d->crouching < 0) flags |= 1<<8;
        putuint(q, flags);
        loopk(3)
        {
            q.put(o[k]&0xFF);
            q.put((o[k]>>8)&0xFF);
            if(o[k] < 0 || o[k] > 0xFFFF) q.put((o[k]>>16)&0xFF);
        }
        uint dir = (d->yaw < 0 ? 360 + int(d->yaw)%360 : int(d->yaw)%360) + clamp(int(d->pitch+90), 0, 180)*360;
        q.put(dir&0xFF);
        q.put((dir>>8)&0xFF);
        q.put(clamp(int(d->roll+90), 0, 180));
        q.put(vel&0xFF);
        if(vel > 0xFF) q.put((vel>>8)&0xFF);
        float velyaw, velpitch;
        vectoyawpitch(d->vel, velyaw, velpitch);
        uint veldir = (velyaw < 0 ? 360 + int(velyaw)%360 : int(velyaw)%360) + clamp(int(velpitch+90), 0, 180)*360;
        q.put(veldir&0xFF);
        q.put((veldir>>8)&0xFF);
        if(fall > 0)
        {
            q.put(fall&0xFF);
            if(fall > 0xFF) q.put((fall>>8)&0xFF);
            if(d->falling.x || d->falling.y || d->falling.z > 0)
            {
                float fallyaw, fallpitch;
                vectoyawpitch(d->falling, fallyaw, fallpitch);
                uint falldir = (fallyaw < 0 ? 360 + int(fallyaw)%360 : int(fallyaw)%360) + clamp(int(fallpitch+90), 0, 180)*360;
                q.put(falldir&0xFF);
                q.put((falldir>>8)&0xFF);
            }
        }
    }

    void sendposition(gameent *d, bool reliable)
    {
        if(d->state != CS_ALIVE && d->state != CS_EDITING) return;
        packetbuf q(100, reliable ? ENET_PACKET_FLAG_RELIABLE : 0);
        sendposition(d, q);
        sendclientpacket(q.finalize(), 0);
    }

    void sendpositions()
    {
        loopv(players)
        {
            gameent *d = players[i];
            if((d == player1) && (d->state == CS_ALIVE || d->state == CS_EDITING))
            {
                packetbuf q(100);
                sendposition(d, q);
                for(int j = i+1; j < players.length(); j++)
                {
                    gameent *d = players[j];
                    if((d == player1) && (d->state == CS_ALIVE || d->state == CS_EDITING))
                        sendposition(d, q);
                }
                sendclientpacket(q.finalize(), 0);
                break;
            }
        }
    }

    void sendmessages()
    {
        packetbuf p(MAXTRANS);
        if(sendcrc)
        {
            p.reliable();
            sendcrc = false;
            const char *mname = getclientmap();
            putint(p, N_MAPCRC);
            sendstring(mname, p);
            putint(p, mname[0] ? getmapcrc() : 0);
        }
        if(senditemstoserver)
        {
            p.reliable();
            entities::putitems(p);
            if(cmode) cmode->senditems(p);
            senditemstoserver = false;
        }
        if(messages.length())
        {
            p.put(messages.getbuf(), messages.length());
            messages.setsize(0);
            if(messagereliable) p.reliable();
            messagereliable = false;
            messagecn = -1;
        }
        if(totalmillis-lastping>250)
        {
            putint(p, N_PING);
            putint(p, totalmillis);
            lastping = totalmillis;
        }
        sendclientpacket(p.finalize(), 1);
    }

    void c2sinfo(bool force) // send update to the server
    {
        static int lastupdate = -1000;
        if(totalmillis - lastupdate < 40 && !force) return; // don't update faster than 30fps
        lastupdate = totalmillis;
        sendpositions();
        sendmessages();
        flushclient();
    }

    void sendintro()
    {
        packetbuf p(MAXTRANS, ENET_PACKET_FLAG_RELIABLE);
        putint(p, N_CONNECT);
        sendstring(player1->name, p);
        putint(p, player1->playermodel);
        putint(p, player1->playercolor);
        sendclientpacket(p.finalize(), 1);
    }

    void updatepos(gameent *d)
    {
        // update the position of other clients in the game in our world
        // don't care if he's in the scenery or other players,
        // just don't overlap with our client

        const float r = player1->radius+d->radius;
        const float dx = player1->o.x-d->o.x;
        const float dy = player1->o.y-d->o.y;
        const float dz = player1->o.z-d->o.z;
        const float rz = player1->aboveeye+d->eyeheight;
        const float fx = (float)fabs(dx), fy = (float)fabs(dy), fz = (float)fabs(dz);
        if(fx<r && fy<r && fz<rz && player1->state!=CS_SPECTATOR && d->state!=CS_DEAD)
        {
            if(fx<fy) d->o.y += dy<0 ? r-fy : -(r-fy);  // push aside
            else      d->o.x += dx<0 ? r-fx : -(r-fx);
        }
        int lagtime = totalmillis-d->lastupdate;
        if(lagtime)
        {
            if(d->state!=CS_SPAWNING && d->lastupdate) d->plag = (d->plag*5+lagtime)/6;
            d->lastupdate = totalmillis;
        }
    }

    void parsepositions(ucharbuf &p)
    {
        int type;
        while(p.remaining()) switch(type = getint(p))
        {
            case N_POS:                        // position of another client
            {
                int cn = getuint(p), physstate = p.get(), flags = getuint(p);
                vec o, vel, falling;
                float yaw, pitch, roll;
                loopk(3)
                {
                    int n = p.get(); n |= p.get()<<8; if(flags&(1<<k)) { n |= p.get()<<16; if(n&0x800000) n |= ~0U<<24; }
                    o[k] = n/DMF;
                }
                int dir = p.get(); dir |= p.get()<<8;
                yaw = dir%360;
                pitch = clamp(dir/360, 0, 180)-90;
                roll = clamp(int(p.get()), 0, 180)-90;
                int mag = p.get(); if(flags&(1<<3)) mag |= p.get()<<8;
                dir = p.get(); dir |= p.get()<<8;
                vecfromyawpitch(dir%360, clamp(dir/360, 0, 180)-90, 1, 0, vel);
                vel.mul(mag/DVELF);
                if(flags&(1<<4))
                {
                    mag = p.get(); if(flags&(1<<5)) mag |= p.get()<<8;
                    if(flags&(1<<6))
                    {
                        dir = p.get(); dir |= p.get()<<8;
                        vecfromyawpitch(dir%360, clamp(dir/360, 0, 180)-90, 1, 0, falling);
                    }
                    else falling = vec(0, 0, -1);
                    falling.mul(mag/DVELF);
                }
                else falling = vec(0, 0, 0);
                int seqcolor = (physstate>>3)&1;
                gameent *d = getclient(cn);
                if(!d || d->lifesequence < 0 || seqcolor!=(d->lifesequence&1) || d->state==CS_DEAD) continue;
                float oldyaw = d->yaw, oldpitch = d->pitch, oldroll = d->roll;
                d->yaw = yaw;
                d->pitch = pitch;
                d->roll = roll;
                d->move = (physstate>>4)&2 ? -1 : (physstate>>4)&1;
                d->strafe = (physstate>>6)&2 ? -1 : (physstate>>6)&1;
                d->crouching = (flags&(1<<8))!=0 ? -1 : abs(d->crouching);
                vec oldpos(d->o);
                d->o = o;
                d->o.z += d->eyeheight;
                d->vel = vel;
                d->falling = falling;
                d->physstate = physstate&7;
                updatephysstate(d);
                updatepos(d);
                if(smoothmove && d->smoothmillis>=0 && oldpos.dist(d->o) < smoothdist)
                {
                    d->newpos = d->o;
                    d->newyaw = d->yaw;
                    d->newpitch = d->pitch;
                    d->newroll = d->roll;
                    d->o = oldpos;
                    d->yaw = oldyaw;
                    d->pitch = oldpitch;
                    d->roll = oldroll;
                    (d->deltapos = oldpos).sub(d->newpos);
                    d->deltayaw = oldyaw - d->newyaw;
                    if(d->deltayaw > 180) d->deltayaw -= 360;
                    else if(d->deltayaw < -180) d->deltayaw += 360;
                    d->deltapitch = oldpitch - d->newpitch;
                    d->deltaroll = oldroll - d->newroll;
                    d->smoothmillis = lastmillis;
                }
                else d->smoothmillis = 0;
                if(d->state==CS_LAGGED || d->state==CS_SPAWNING) d->state = CS_ALIVE;
                break;
            }

            case N_TELEPORT:
            {
                int cn = getint(p), tp = getint(p), td = getint(p);
                gameent *d = getclient(cn);
                if(!d || d->lifesequence < 0 || d->state==CS_DEAD) continue;
                entities::teleporteffects(d, tp, td, false);
                break;
            }

            case N_JUMPPAD:
            {
                int cn = getint(p), jp = getint(p);
                gameent *d = getclient(cn);
                if(!d || d->lifesequence < 0 || d->state==CS_DEAD) continue;
                entities::jumppadeffects(d, jp, false);
                break;
            }

            default:
                neterr("type");
                return;
        }
    }

    void parsestate(gameent *d, ucharbuf &p, bool resume = false)
    {
        if(!d) { static gameent dummy; d = &dummy; }
        if(resume)
        {
            if(d==player1) getint(p);
            else d->state = getint(p);
            d->frags = getint(p);
            d->flags = getint(p);
            d->deaths = getint(p);
        }
        d->lifesequence = getint(p);
        d->health = getint(p);
        d->maxhealth = getint(p);
        if(resume && d==player1)
        {
            getint(p);
            loopi(NUMGUNS) getint(p);
        }
        else
        {
            int gun = getint(p);
            d->gunselect = clamp(gun, 0, NUMGUNS-1);
            loopi(NUMGUNS) d->ammo[i] = getint(p);
        }
    }

    void parsemessages(int cn, gameent *d, ucharbuf &p)
    {
        static char text[MAXTRANS];
        int type;

        while(p.remaining()) switch(type = getint(p))
        {
            case N_SERVINFO:                   // welcome messsage from the server
            {
                int mycn = getint(p), prot = getint(p);
                if(prot!=PROTOCOL_VERSION)
                {
                    conoutf(CON_ERROR, "you are using a different game protocol (you: %d, server: %d)", PROTOCOL_VERSION, prot);
                    disconnect();
                    return;
                }
                sessionid = getint(p);
                player1->clientnum = mycn;      // we are now connected
                sendintro();
                break;
            }

            case N_WELCOME:
            {
                connected = true;
                notifywelcome();
                break;
            }

            case N_PAUSEGAME:
            {
                bool val = getint(p) > 0;
                int cn = getint(p);
                gameent *a = cn >= 0 ? getclient(cn) : NULL;
                gamepaused = val;
                player1->attacking = ACT_IDLE;
                if(a) conoutf("%s %s the game", colorname(a), val ? "paused" : "resumed");
                else conoutf("game is %s", val ? "paused" : "resumed");
                break;
            }

            case N_GAMESPEED:
            {
                int val = clamp(getint(p), 10, 1000), cn = getint(p);
                gameent *a = cn >= 0 ? getclient(cn) : NULL;
                gamespeed = val;
                if(a) conoutf("%s set gamespeed to %d", colorname(a), val);
                else conoutf("gamespeed is %d", val);
                break;
            }

            case N_CLIENT:
            {
                int cn = getint(p), len = getuint(p);
                ucharbuf q = p.subbuf(len);
                parsemessages(cn, getclient(cn), q);
                break;
            }

            case N_SOUND:
                if(!d) return;
                playsound(getint(p), &d->o);
                break;

            case N_TEXT:
            {
                if(!d) return;
                getstring(text, p);
                filtertext(text, text, true, true);
                if(d->state!=CS_DEAD && d->state!=CS_SPECTATOR)
                    particle_textcopy(d->abovehead(), text, PART_TEXT, 2000, 0x32FF64, 4.0f, -8);
                conoutf(CON_CHAT, "%s:%s %s", chatcolorname(d), teamtextcode[0], text);
                break;
            }

            case N_SAYTEAM:
            {
                int tcn = getint(p);
                gameent *t = getclient(tcn);
                getstring(text, p);
                filtertext(text, text, true, true);
                if(!t) break;
                int team = validteam(t->team) ? t->team : 0;
                if(t->state!=CS_DEAD && t->state!=CS_SPECTATOR)
                    particle_textcopy(t->abovehead(), text, PART_TEXT, 2000, teamtextcolor[team], 4.0f, -8);
                conoutf(CON_TEAMCHAT, "%s:%s %s", chatcolorname(t), teamtextcode[team], text);
                break;
            }

            case N_MAPCHANGE:
                getstring(text, p);
                changemapserv(text, getint(p));
                if(getint(p)) entities::spawnitems();
                else senditemstoserver = false;
                break;

            case N_INITCLIENT:            // another client either connected or changed name/team
            {
                int cn = getint(p);
                gameent *d = newclient(cn);
                if(!d)
                {
                    getstring(text, p);
                    getstring(text, p);
                    getint(p);
                    getint(p);
                    break;
                }
                getstring(text, p);
                filtertext(text, text, false, false, MAXNAMELEN);
                if(!text[0]) copystring(text, "unnamed");
                if(d->name[0])          // already connected
                {
                    if(strcmp(d->name, text))
                        conoutf("%s is now known as %s", colorname(d), colorname(d, text));
                }
                else                    // new client
                {
                    conoutf("\f0join:\f7 %s", colorname(d, text));
                    if(needclipboard >= 0) needclipboard++;
                }
                copystring(d->name, text, MAXNAMELEN+1);
                d->team = getint(p);
                if(!validteam(d->team)) d->team = 0;
                d->playermodel = getint(p);
                d->playercolor = getint(p);
                break;
            }

            case N_SWITCHNAME:
                getstring(text, p);
                if(d)
                {
                    filtertext(text, text, false, false, MAXNAMELEN);
                    if(!text[0]) copystring(text, "unnamed");
                    if(strcmp(text, d->name))
                    {
                        conoutf("%s is now known as %s", colorname(d), colorname(d, text));
                        copystring(d->name, text, MAXNAMELEN+1);
                    }
                }
                break;

            case N_CDIS:
                clientdisconnected(getint(p));
                break;

            case N_SPAWN:
            {
                if(d)
                {
                    if(d->state==CS_DEAD && d->lastpain) saveragdoll(d);
                    d->respawn();
                }
                parsestate(d, p);
                if(!d) break;
                d->state = CS_SPAWNING;
                if(d == followingplayer()) lasthit = 0;
                checkfollow();
                break;
            }

            case N_SPAWNSTATE:
            {
                int scn = getint(p);
                gameent *s = getclient(scn);
                if(!s) { parsestate(NULL, p); break; }
                if(s->state==CS_DEAD && s->lastpain) saveragdoll(s);
                if(s==player1)
                {
                    if(editmode) toggleedit();
                }
                s->respawn();
                parsestate(s, p);
                s->state = CS_ALIVE;
                if(cmode) cmode->pickspawn(s);
                else findplayerspawn(s, -1, m_teammode ? s->team : 0);
                if(s == player1)
                {
                    lasthit = 0;
                }
                if(cmode) cmode->respawned(s);
                checkfollow();
                addmsg(N_SPAWN, "rcii", s, s->lifesequence, s->gunselect);
                break;
            }

            case N_HITPUSH:
            {
                int tcn = getint(p), atk = getint(p), damage = getint(p);
                gameent *target = getclient(tcn);
                vec dir;
                loopk(3) dir[k] = getint(p)/DNF;
                if(!target || !validatk(atk)) break;
                target->hitpush(damage * (target->health<=0 ? deadpush : 1), dir, NULL, atk);
                break;
            }

            case N_DIED:
            {
                int vcn = getint(p), acn = getint(p), frags = getint(p), tfrags = getint(p);
                gameent *victim = getclient(vcn),
                       *actor = getclient(acn);
                if(!actor) break;
                actor->frags = frags;
                if(!victim) break;
                killed(victim, actor);
                break;
            }

            case N_RESUME:
            {
                for(;;)
                {
                    int cn = getint(p);
                    if(p.overread() || cn<0) break;
                    gameent *d = (cn == player1->clientnum ? player1 : newclient(cn));
                    parsestate(d, p, true);
                }
                break;
            }

            case N_CLIPBOARD:
            {
                int cn = getint(p), unpacklen = getint(p), packlen = getint(p);
                gameent *d = getclient(cn);
                ucharbuf q = p.subbuf(max(packlen, 0));
                if(d) unpackeditinfo(d->edit, q.buf, q.maxlen, unpacklen);
                break;
            }
            case N_UNDO:
            case N_REDO:
            {
                int cn = getint(p), unpacklen = getint(p), packlen = getint(p);
                gameent *d = getclient(cn);
                ucharbuf q = p.subbuf(max(packlen, 0));
                if(d) unpackundo(q.buf, q.maxlen, unpacklen);
                break;
            }

            case N_EDITF:              // coop editing messages
            case N_EDITT:
            case N_EDITM:
            case N_FLIP:
            case N_COPY:
            case N_PASTE:
            case N_ROTATE:
            case N_REPLACE:
            case N_DELCUBE:
            case N_EDITVSLOT:
            {
                if(!d) return;
                selinfo sel;
                sel.o.x = getint(p); sel.o.y = getint(p); sel.o.z = getint(p);
                sel.s.x = getint(p); sel.s.y = getint(p); sel.s.z = getint(p);
                sel.grid = getint(p); sel.orient = getint(p);
                sel.cx = getint(p); sel.cxs = getint(p); sel.cy = getint(p), sel.cys = getint(p);
                sel.corner = getint(p);
                switch(type)
                {
                    case N_EDITF: { int dir = getint(p), mode = getint(p); if(sel.validate()) mpeditface(dir, mode, sel, false); break; }
                    case N_EDITT:
                    {
                        int tex = getint(p),
                            allfaces = getint(p);
                        if(p.remaining() < 2) return;
                        int extra = lilswap(*(const ushort *)p.pad(2));
                        if(p.remaining() < extra) return;
                        ucharbuf ebuf = p.subbuf(extra);
                        if(sel.validate()) mpedittex(tex, allfaces, sel, ebuf);
                        break;
                    }
                    case N_EDITM: { int mat = getint(p), filter = getint(p); if(sel.validate()) mpeditmat(mat, filter, sel, false); break; }
                    case N_FLIP: if(sel.validate()) mpflip(sel, false); break;
                    case N_COPY: if(d && sel.validate()) mpcopy(d->edit, sel, false); break;
                    case N_PASTE: if(d && sel.validate()) mppaste(d->edit, sel, false); break;
                    case N_ROTATE: { int dir = getint(p); if(sel.validate()) mprotate(dir, sel, false); break; }
                    case N_REPLACE:
                    {
                        int oldtex = getint(p),
                            newtex = getint(p),
                            insel = getint(p);
                        if(p.remaining() < 2) return;
                        int extra = lilswap(*(const ushort *)p.pad(2));
                        if(p.remaining() < extra) return;
                        ucharbuf ebuf = p.subbuf(extra);
                        if(sel.validate()) mpreplacetex(oldtex, newtex, insel>0, sel, ebuf);
                        break;
                    }
                    case N_DELCUBE: if(sel.validate()) mpdelcube(sel, false); break;
                    case N_EDITVSLOT:
                    {
                        int delta = getint(p),
                            allfaces = getint(p);
                        if(p.remaining() < 2) return;
                        int extra = lilswap(*(const ushort *)p.pad(2));
                        if(p.remaining() < extra) return;
                        ucharbuf ebuf = p.subbuf(extra);
                        if(sel.validate()) mpeditvslot(delta, allfaces, sel, ebuf);
                        break;
                    }
                }
                break;
            }
            case N_REMIP:
                if(!d) return;
                conoutf("%s remipped", colorname(d));
                mpremip(false);
                break;
            case N_CALCLIGHT:
                if(!d) return;
                conoutf("%s calced lights", colorname(d));
                mpcalclight(false);
                break;
            case N_EDITENT:            // coop edit of ent
            {
                if(!d) return;
                int i = getint(p);
                float x = getint(p)/DMF, y = getint(p)/DMF, z = getint(p)/DMF;
                int type = getint(p);
                int attr1 = getint(p), attr2 = getint(p), attr3 = getint(p), attr4 = getint(p), attr5 = getint(p);

                mpeditent(i, vec(x, y, z), type, attr1, attr2, attr3, attr4, attr5, false);
                break;
            }
            case N_EDITVAR:
            {
                if(!d) return;
                int type = getint(p);
                getstring(text, p);
                string name;
                filtertext(name, text, false);
                ident *id = getident(name);
                switch(type)
                {
                    case ID_VAR:
                    {
                        int val = getint(p);
                        if(id && id->flags&IDF_OVERRIDE && !(id->flags&IDF_READONLY)) setvar(name, val);
                        break;
                    }
                    case ID_FVAR:
                    {
                        float val = getfloat(p);
                        if(id && id->flags&IDF_OVERRIDE && !(id->flags&IDF_READONLY)) setfvar(name, val);
                        break;
                    }
                    case ID_SVAR:
                    {
                        getstring(text, p);
                        if(id && id->flags&IDF_OVERRIDE && !(id->flags&IDF_READONLY)) setsvar(name, text);
                        break;
                    }
                }
                printvar(d, id);
                break;
            }

            case N_PONG:
                addmsg(N_CLIENTPING, "i", player1->ping = (player1->ping*5+totalmillis-getint(p))/6);
                break;

            case N_CLIENTPING:
                if(!d) return;
                d->ping = getint(p);
                break;

            case N_TIMEUP:
                timeupdate(getint(p));
                break;

            case N_SERVMSG:
                getstring(text, p);
                conoutf("%s", text);
                break;

            case N_EDITMODE:
            {
                int val = getint(p);
                if(!d) break;
                if(val)
                {
                    d->editstate = d->state;
                    d->state = CS_EDITING;
                }
                else
                {
                    d->state = d->editstate;
                    if(d->state==CS_DEAD) deathstate(d, true);
                }
                checkfollow();
                break;
            }

            case N_NEWMAP:
            {
                int size = getint(p);
                if(size>=0) emptymap(size, true, NULL);
                else enlargemap(true);
                if(d && d!=player1)
                {
                    int newsize = 0;
                    while(1<<newsize < getworldsize()) newsize++;
                    conoutf(size>=0 ? "%s started a new map of size %d" : "%s enlarged the map to size %d", colorname(d), newsize);
                }
                break;
            }

            case N_SERVCMD:
                getstring(text, p);
                break;

            default:
                neterr("type", cn < 0);
                return;
        }
    }

    void receivefile(packetbuf &p)
    {
    }

    void parsepacketclient(int chan, packetbuf &p)   // processes any updates from the server
    {
        if(p.packet->flags&ENET_PACKET_FLAG_UNSEQUENCED) return;
        switch(chan)
        {
            case 0:
                parsepositions(p);
                break;

            case 1:
                parsemessages(-1, NULL, p);
                break;

            case 2:
                receivefile(p);
                break;
        }
    }
}