/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// cl_main.c  -- client main loop

#include "quakedef.h"

// we need to declare some mouse variables here, because the menu system
// references them even when on a unix system.

// these two are not intended to be set directly
cvar_t	cl_name = {"_cl_name", "player", true};
cvar_t	cl_color = {"_cl_color", "22", true}; // edited

cvar_t	cl_vibration = {"cl_vibration","0", false}; // Edited
cvar_t	cl_showfps = {"cl_showfps","0"};	// 2001-11-31 FPS display by QuakeForge/Muff
cvar_t	cl_shownet = {"cl_shownet","0"};	// can be 0, 1, or 2
cvar_t	cl_nolerp = {"cl_nolerp","0"};

cvar_t	lookspring = {"lookspring","0", true};
cvar_t	lookstrafe = {"lookstrafe","0", true};
cvar_t	sensitivity = {"sensitivity","11", true}; // edited

cvar_t	m_pitch = {"m_pitch","0.022", true};
cvar_t	m_yaw = {"m_yaw","0.022", true};
cvar_t	m_forward = {"m_forward","1", true};
cvar_t	m_side = {"m_side","0.8", true};
cvar_t	m_look = {"m_look","1", true}; // m_look


client_static_t	cls;
client_state_t	cl;
// FIXME: put these on hunk?
//Edited on hunk per mh tute:  efrag_t			cl_efrags[MAX_EFRAGS];
entity_t		cl_entities[MAX_EDICTS];
entity_t		cl_static_entities[MAX_STATIC_ENTITIES];
lightstyle_t	cl_lightstyle[MAX_LIGHTSTYLES];
dlight_t		cl_dlights[MAX_DLIGHTS];

int				cl_numvisedicts;
entity_t		*cl_visedicts[MAX_VISEDICTS];

/*
=====================
CL_ClearState

=====================
*/
void CL_ClearState(void)
{
    if (!sv.active) {
        Host_ClearMemory();
    }

// wipe the entire cl structure
    memset(&cl, 0, sizeof(cl));

    SZ_Clear(&cls.message);

// clear other arrays
    memset(cl_entities, 0, sizeof(cl_entities));
    memset(cl_dlights, 0, sizeof(cl_dlights));
    memset(cl_lightstyle, 0, sizeof(cl_lightstyle));
    memset(cl_temp_entities, 0, sizeof(cl_temp_entities));
    memset(cl_beams, 0, sizeof(cl_beams));

//
// allocate the efrags and chain together into a free list
//
    cl.free_efrags = NULL; //Edited will be allocated dynamically.
}

/*
=====================
CL_Disconnect

Sends a disconnect message to the server
This is also called on Host_Error, so it shouldn't cause any errors
=====================
*/
void CL_Disconnect(void)
{
// stop sounds (especially looping!)
    S_StopAllSounds(true);

// bring the console down and fade the colors back to normal
//	SCR_BringDownConsole ();

// ToChriS 1.67 - begin
// clear effects
//void CL_ClearCshifts (void)
    {
        int i;

        for (i = 0; i < NUM_CSHIFTS; i++) {
            cl.cshifts[i].percent = 0;
        }
    }
// ToChriS 1.67 - end

// if running a local server, shut it down
    if (cls.demoplayback) {
        CL_StopPlayback();
    } else if (cls.state == ca_connected) {
        if (cls.demorecording) {
            CL_Stop_f();
        }

        Con_DPrintf("Sending clc_disconnect\n");
        SZ_Clear(&cls.message);
        MSG_WriteByte(&cls.message, clc_disconnect);
        NET_SendUnreliableMessage(cls.netcon, &cls.message);
        SZ_Clear(&cls.message);
        NET_Close(cls.netcon);

        cls.state = ca_disconnected;
        if (sv.active) {
            Host_ShutdownServer(false);
        }
    }

    cls.demoplayback = cls.timedemo = false;
    cls.signon = 0;
    // begin
    Vibration_Stop(0);
    Vibration_Stop(1);
    // end
}

void CL_Disconnect_f(void)
{
    CL_Disconnect();
    if (sv.active) {
        Host_ShutdownServer(false);
    }
}




/*
=====================
CL_EstablishConnection

Host should be either "local" or a net address to be passed on
=====================
*/
void CL_EstablishConnection(char *host)
{
    if (cls.state == ca_dedicated) {
        return;
    }

    if (cls.demoplayback) {
        return;
    }

    CL_Disconnect();

    cls.netcon = NET_Connect(host);
    if (!cls.netcon) {
        Host_Error("CL_Connect: connect failed\n");
    }
    Con_DPrintf("CL_EstablishConnection: connected to %s\n", host);

    cls.demonum = -1;			// not in the demo loop now
    cls.state = ca_connected;
    cls.signon = 0;				// need all the signon messages before playing
}

/*
=====================
CL_SignonReply

An svc_signonnum has been received, perform a client side setup
=====================
*/
void CL_SignonReply(void)
{
    char 	str[8192];

    Con_DPrintf("CL_SignonReply: %i\n", cls.signon);

    switch (cls.signon) {
    case 1:
        MSG_WriteByte(&cls.message, clc_stringcmd);
        MSG_WriteString(&cls.message, "prespawn");
        break;

    case 2:
        MSG_WriteByte(&cls.message, clc_stringcmd);
        MSG_WriteString(&cls.message, va("name \"%s\"\n", cl_name.string));

        MSG_WriteByte(&cls.message, clc_stringcmd);
        MSG_WriteString(&cls.message, va("color %i %i\n", ((int)cl_color.value)>>4, ((int)cl_color.value)&15));

        MSG_WriteByte(&cls.message, clc_stringcmd);
        sprintf(str, "spawn %s", cls.spawnparms);
        MSG_WriteString(&cls.message, str);
        break;

    case 3:
        MSG_WriteByte(&cls.message, clc_stringcmd);
        MSG_WriteString(&cls.message, "begin");
        Cache_Report();		// print remaining memory
        break;

    case 4:
        SCR_EndLoadingPlaque();		// allow normal screen updates
        break;
    }
}

/*
=====================
CL_NextDemo

Called to play the next demo in the demo loop
=====================
*/
void CL_NextDemo(void)
{
    char	str[1024];

    if (cls.demonum == -1) {
        return;    // don't play demos
    }

    SCR_BeginLoadingPlaque();

    if (!cls.demos[cls.demonum][0] || cls.demonum == MAX_DEMOS) {
        cls.demonum = 0;
        if (!cls.demos[cls.demonum][0]) {
            Con_Printf("No demos listed with startdemos\n");
            cls.demonum = -1;
            return;
        }
    }

    sprintf(str,"playdemo %s\n", cls.demos[cls.demonum]);
    Cbuf_InsertText(str);
    cls.demonum++;
}

/*
==============
CL_PrintEntities_f
==============
*/
void CL_PrintEntities_f(void)
{
    entity_t	*ent;
    int			i;

    for (i=0,ent=cl_entities ; i<cl.num_entities ; i++,ent++) {
        Con_Printf("%3i:",i);
        if (!ent->model) {
            Con_Printf("EMPTY\n");
            continue;
        }
        Con_Printf("%s:%2i  (%5.1f,%5.1f,%5.1f) [%5.1f %5.1f %5.1f]\n"
                   ,ent->model->name,ent->frame, ent->origin[0], ent->origin[1], ent->origin[2], ent->angles[0], ent->angles[1], ent->angles[2]);
    }
}


/*
===============
SetPal

Debugging tool, just flashes the screen
===============
*/
void SetPal(int i)
{
#if 0
    static int old;
    byte	pal[768];
    int		c;

    if (i == old) {
        return;
    }
    old = i;

    if (i==0) {
        VID_SetPalette(host_basepal);
    } else if (i==1) {
        for (c=0 ; c<768 ; c+=3) {
            pal[c] = 0;
            pal[c+1] = 255;
            pal[c+2] = 0;
        }
        VID_SetPalette(pal);
    } else {
        for (c=0 ; c<768 ; c+=3) {
            pal[c] = 0;
            pal[c+1] = 0;
            pal[c+2] = 255;
        }
        VID_SetPalette(pal);
    }
#endif
}

/*
===============
CL_AllocDlight

===============
*/
dlight_t *CL_AllocDlight(int key)
{
    int		i;
    dlight_t	*dl;

// first look for an exact key match
    if (key) {
        dl = cl_dlights;
        for (i=0 ; i<MAX_DLIGHTS ; i++, dl++) {
            if (dl->key == key) {
                memset(dl, 0, sizeof(*dl));
                dl->key = key;
                return dl;
            }
        }
    }

// then look for anything else
    dl = cl_dlights;
    for (i=0 ; i<MAX_DLIGHTS ; i++, dl++) {
        if (dl->die < cl.time) {
            memset(dl, 0, sizeof(*dl));
            dl->key = key;
            return dl;
        }
    }

    dl = &cl_dlights[0];
    memset(dl, 0, sizeof(*dl));
    dl->key = key;
    return dl;
}


/*
===============
CL_DecayLights

===============
*/
void CL_DecayLights(void)
{
    int			i;
    dlight_t	*dl;
    float		time;

    time = cl.time - cl.oldtime;

    dl = cl_dlights;
    for (i=0 ; i<MAX_DLIGHTS ; i++, dl++) {
        if (dl->die < cl.time || !dl->radius) {
            continue;
        }

        dl->radius -= time*dl->decay;
        if (dl->radius < 0) {
            dl->radius = 0;
        }
    }
}


/*
===============
CL_LerpPoint

Determines the fraction between the last two messages that the objects
should be put at.
===============
*/
float	CL_LerpPoint(void)
{
    double	f, frac;

    f = cl.mtime[0] - cl.mtime[1];

    if (!f || cl_nolerp.value || cls.timedemo || sv.active) {
        cl.time = cl.mtime[0];
        return 1;
    }

    if (f > 0.1) {
        // dropped packet, or start of demo
        cl.mtime[1] = cl.mtime[0] - 0.1;
        f = 0.1;
    }
    frac = (cl.time - cl.mtime[1]) / f;
//Con_Printf ("frac: %f\n",frac);
    if (frac < 0) {
        if (frac < -0.01) {
            SetPal(1);
            cl.time = cl.mtime[1];
//				Con_Printf ("low frac\n");
        }
        frac = 0;
    } else if (frac > 1) {
        if (frac > 1.01) {
            SetPal(2);
            cl.time = cl.mtime[0];
//				Con_Printf ("high frac\n");
        }
        frac = 1;
    } else {
        SetPal(0);
    }

    return frac;
}


/*
===============
CL_RelinkEntities
===============
*/
void CL_RelinkEntities(void)
{
    entity_t	*ent;
    int			i, j;
    float		frac, f, d;
    vec3_t		delta;
    float		bobjrotate;
    vec3_t		oldorg;
    dlight_t	*dl;

// determine partial update time
    frac = CL_LerpPoint();

    cl_numvisedicts = 0;

//
// interpolate player info
//
    for (i=0 ; i<3 ; i++)
        cl.velocity[i] = cl.mvelocity[1][i] +
                         frac * (cl.mvelocity[0][i] - cl.mvelocity[1][i]);

    if (cls.demoplayback) {
        // interpolate the angles
        for (j=0 ; j<3 ; j++) {
            d = cl.mviewangles[0][j] - cl.mviewangles[1][j];
            if (d > 180) {
                d -= 360;
            } else if (d < -180) {
                d += 360;
            }
            cl.viewangles[j] = cl.mviewangles[1][j] + frac*d;
        }
    }

    bobjrotate = anglemod(100*cl.time);

// start on the entity after the world
    for (i=1,ent=cl_entities+1 ; i<cl.num_entities ; i++,ent++) {
        if (!ent->model) {
            // empty slot
            if (ent->forcelink) {
                R_RemoveEfrags(ent);    // just became empty
            }
            continue;
        }

// if the object wasn't included in the last packet, remove it
        if (ent->msgtime != cl.mtime[0]) {
            ent->model = NULL;
            // model interpolation - begin
            ent->reset_frame_interpolation = true; // Edited
            ent->translate_start_time = 0;
            ent->rotate_start_time    = 0;
            // model interpolation - end
            continue;
        }

        VectorCopy(ent->origin, oldorg);

        if (ent->forcelink) {
            // the entity was not updated in the last message
            // so move to the final spot
            VectorCopy(ent->msg_origins[0], ent->origin);
            VectorCopy(ent->msg_angles[0], ent->angles);
        } else {
            // if the delta is large, assume a teleport and don't lerp
            f = frac;
            for (j=0 ; j<3 ; j++) {
                delta[j] = ent->msg_origins[0][j] - ent->msg_origins[1][j];
                if (delta[j] > 100 || delta[j] < -100) {
                    f = 1;    // assume a teleportation, not a motion
                }
            }

            // model interpolation - begin
            // interpolation should be reset in the event of a large delta
            if (f == 1) {
                ent->translate_start_time = 0;
                ent->rotate_start_time    = 0;
            }
            // model interpolation - end

            // interpolate the origin and angles
            for (j=0 ; j<3 ; j++) {
                ent->origin[j] = ent->msg_origins[1][j] + f*delta[j];

                d = ent->msg_angles[0][j] - ent->msg_angles[1][j];
                if (d > 180) {
                    d -= 360;
                } else if (d < -180) {
                    d += 360;
                }
                ent->angles[j] = ent->msg_angles[1][j] + f*d;
            }

        }

        if (ent->effects) { // Edited
            // Edited
            if (ent->effects & EF_BRIGHTFIELD) {
                R_EntityParticles(ent);
            }

#ifdef QUAKE2
            if (ent->effects & EF_DARKFIELD) {
                R_DarkFieldParticles(ent);
            }
#endif

            if (ent->effects & EF_MUZZLEFLASH) {
                vec3_t		fv, rv, uv;

                dl = CL_AllocDlight(i);
                VectorCopy(ent->origin,  dl->origin);
                dl->origin[2] += 16;
                AngleVectors(ent->angles, fv, rv, uv);

                VectorMA(dl->origin, 18, fv, dl->origin);
                dl->radius = (float)(200 + (rand()&31));
                dl->minlight = 32;
                dl->die = cl.time + 0.1;
            }
            if (ent->effects & EF_BRIGHTLIGHT) {
                dl = CL_AllocDlight(i);
                VectorCopy(ent->origin,  dl->origin);
                dl->origin[2] += 16;
                dl->radius = (float)(400 + (rand()&31));
                dl->die = cl.time + 0.001;
            }
            if (ent->effects & EF_DIMLIGHT) {
                dl = CL_AllocDlight(i);
                VectorCopy(ent->origin,  dl->origin);
                dl->radius = (float)(200 + (rand()&31));
                dl->die = cl.time + 0.001;
            }
#ifdef QUAKE2
            if (ent->effects & EF_DARKLIGHT) {
                dl = CL_AllocDlight(i);
                VectorCopy(ent->origin,  dl->origin);
                dl->radius = 200.0 + (rand()&31);
                dl->die = cl.time + 0.001;
                dl->dark = true;
            }
            if (ent->effects & EF_LIGHT) {
                dl = CL_AllocDlight(i);
                VectorCopy(ent->origin,  dl->origin);
                dl->radius = 200;
                dl->die = cl.time + 0.001;
            }
#endif
        } // Edited

        if (ent->model->flags) { // Edited
            // Edited
// rotate binary objects locally
            if (ent->model->flags & EF_ROTATE) {
                ent->angles[1] = bobjrotate;
            }

            if (ent->model->flags & EF_GIB) {
                R_RocketTrail(oldorg, ent->origin, 2);
            } else if (ent->model->flags & EF_ZOMGIB) {
                R_RocketTrail(oldorg, ent->origin, 4);
            } else if (ent->model->flags & EF_TRACER) {
                R_RocketTrail(oldorg, ent->origin, 3);
            } else if (ent->model->flags & EF_TRACER2) {
                R_RocketTrail(oldorg, ent->origin, 5);
            } else if (ent->model->flags & EF_ROCKET) {
                R_RocketTrail(oldorg, ent->origin, 0);
                dl = CL_AllocDlight(i);
                VectorCopy(ent->origin, dl->origin);
                dl->radius = 200.f;
                dl->die = cl.time + 0.01;
            } else if (ent->model->flags & EF_GRENADE) {
                R_RocketTrail(oldorg, ent->origin, 1);
            } else if (ent->model->flags & EF_TRACER3) {
                R_RocketTrail(oldorg, ent->origin, 6);
            }
        } // Edited
        // Tomaz - QC Glow Begin
        if (ent->glow_size)
#ifdef QUAKE2
            if (!(ent->effects & (EF_MUZZLEFLASH|EF_BRIGHTLIGHT|EF_DIMLIGHT|EF_DARKLIGHT|EF_LIGHT))) // Edited
#else
            if (!(ent->effects & (EF_MUZZLEFLASH|EF_BRIGHTLIGHT|EF_DIMLIGHT))) // Edited
#endif
            {
                dl = CL_AllocDlight(i);
                VectorCopy(ent->origin, dl->origin);
                dl->radius = abs(ent->glow_size); // edited
                dl->dark = (ent->glow_size < 0); // Edited
                dl->die = cl.time + 0.001;
                //	dl->color[0] = ent->glow_red;
                //	dl->color[1] = ent->glow_green;
                //	dl->color[2] = ent->glow_blue;
            }
        // Tomaz - QC Glow End
        ent->forcelink = false;

        // model interpolation - begin
        // hack to make interpolation look better in demos
        if (cls.demoplayback)
            if (i != cl.viewentity && ent!=&cl.viewent && ent->model->type == mod_alias) {
                //	if (ent->translate_start_time)
                VectorCopy(ent->msg_origins[0], ent->origin);
                //	if (ent->rotate_start_time)
                VectorCopy(ent->msg_angles[0], ent->angles);
            }
        // model interpolation - end

        if (i == cl.viewentity && !chase_active.value) {
            continue;
        }

        if (ent->effects & EF_NODRAW) {
            continue;
        }

        if (cl_numvisedicts < MAX_VISEDICTS) {
            cl_visedicts[cl_numvisedicts] = ent;
            cl_numvisedicts++;
        }
    }

}


/*
===============
CL_ReadFromServer

Read all incoming data from the server
===============
*/
int CL_ReadFromServer(void)
{
    int		ret;

    cl.oldtime = cl.time;
    cl.time += host_frametime;

    do {
        ret = CL_GetMessage();
        if (ret == -1) {
            Host_Error("CL_ReadFromServer: lost server connection");
        }
        if (!ret) {
            break;
        }

        cl.last_received_message = realtime;
        CL_ParseServerMessage();
    } while (ret && cls.state == ca_connected);

    if (cl_shownet.value) {
        Con_Printf("\n");
    }

    CL_RelinkEntities();
//	CL_UpdateTEnts (); // moved to R_RenderView_

//
// bring the links up to date
//
    return 0;
}

/*
=================
CL_SendCmd
=================
*/
void CL_SendCmd(void)
{
    usercmd_t		cmd;

    if (cls.state != ca_connected) {
        return;
    }

    if (cls.signon == SIGNONS) {
        // get basic movement from keyboard
        CL_BaseMove(&cmd);

        // allow mice or other external controllers to add to the move
        IN_Move(&cmd);

        // send the unreliable message
        CL_SendMove(&cmd);

    }

    if (cls.demoplayback) {
        SZ_Clear(&cls.message);
        return;
    }

// send the reliable message
    if (!cls.message.cursize) {
        return;    // no message at all
    }

    if (!NET_CanSendMessage(cls.netcon)) {
        Con_DPrintf("CL_WriteToServer: can't send\n");
        return;
    }

    if (NET_SendMessage(cls.netcon, &cls.message) == -1) {
        Host_Error("CL_WriteToServer: lost server connection");
    }

    SZ_Clear(&cls.message);
}

/*
=================
CL_Init
=================
*/
void CL_Init(void)
{
    SZ_Alloc(&cls.message, 1024);

    CL_InitInput();
    CL_InitTEnts();

//
// register our commands
//
    Cvar_RegisterVariable(&cl_name);
    Cvar_RegisterVariable(&cl_color);
    Cvar_RegisterVariable(&cl_upspeed);
    Cvar_RegisterVariable(&cl_forwardspeed);
    Cvar_RegisterVariable(&cl_backspeed);
    Cvar_RegisterVariable(&cl_sidespeed);
    Cvar_RegisterVariable(&cl_movespeedkey);
    Cvar_RegisterVariable(&cl_yawspeed);
    Cvar_RegisterVariable(&cl_pitchspeed);
    Cvar_RegisterVariable(&cl_anglespeedkey);
    Cvar_RegisterVariable(&cl_vibration);  // Edited
    Cvar_RegisterVariable(&cl_showfps);	// 2001-11-31 FPS display by QuakeForge/Muff
    Cvar_RegisterVariable(&cl_shownet);
    Cvar_RegisterVariable(&cl_nolerp);
    Cvar_RegisterVariable(&lookspring);
    Cvar_RegisterVariable(&lookstrafe);
    Cvar_RegisterVariable(&sensitivity);

    Cvar_RegisterVariable(&m_pitch);
    Cvar_RegisterVariable(&m_yaw);
    Cvar_RegisterVariable(&m_forward);
    Cvar_RegisterVariable(&m_side);
    Cvar_RegisterVariable(&m_look);  // m_look
//	Cvar_RegisterVariable (&cl_autofire);

    Cmd_AddCommand("entities", CL_PrintEntities_f);
    Cmd_AddCommand("disconnect", CL_Disconnect_f);
    Cmd_AddCommand("record", CL_Record_f);
    Cmd_AddCommand("stop", CL_Stop_f);
    Cmd_AddCommand("playdemo", CL_PlayDemo_f);
    Cmd_AddCommand("timedemo", CL_TimeDemo_f);
}

