/*
  Copyright (C) 2010-2011  Charles Pence <charles@charlespence.net>
  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 3 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, see <http://www.gnu.org/licenses/>.
*/

typedef struct
{
    vec3_t    viewangles;

// intended velocities
    float    forwardmove;
    float    sidemove;
    float    upmove;
} usercmd_t;

typedef struct
{
    int        length;
    char    map[MAX_STYLESTRING];
} lightstyle_t;

typedef struct
{
    char    name[MAX_SCOREBOARDNAME];
    float    entertime;
    int        frags;
    int        colors;            // two 4 bit fields
} scoreboard_t;

typedef struct
{
    int        destcolor[3];
    int        percent;        // 0-256
} cshift_t;

#define    CSHIFT_CONTENTS    0
#define    CSHIFT_DAMAGE    1
#define    CSHIFT_BONUS    2
#define    CSHIFT_POWERUP    3
#define    NUM_CSHIFTS        4

#define    NAME_LENGTH    64


//
// client_state_t should hold all pieces of the client state
//

#define    SIGNONS        4            // signon messages to receive before connected

#define    MAX_DLIGHTS        32
typedef struct
{
    vec3_t    origin;
    float    radius;
    float    die;                // stop lighting after this time
    float    decay;                // drop this each second
    float    minlight;            // don't add when contributing less
    int        key;
    vec3_t  color;
    qboolean    dark;            // subtracts light instead of adding
} dlight_t;


#define    MAX_BEAMS    24
typedef struct
{
    int        entity;
    struct model_s    *model;
    float    endtime;
    vec3_t    start, end;
} beam_t;

#define    MAX_EFRAGS        640

#define    MAX_MAPSTRING    2048
#define    MAX_DEMOS        8
#define    MAX_DEMONAME    16

typedef enum {
ca_invalid,
ca_disconnected,     // full screen console with no connection
ca_connected        // valid netcon, talking to a server
} cactive_t;

//
// the client_static_t structure is persistant through an arbitrary number
// of server connections
//
typedef struct
{
    cactive_t    state;

// personalization data sent to server
    char        mapstring[MAX_QPATH];
    char        spawnparms[MAX_MAPSTRING];    // to restart a level

// demo loop control
    int            demonum;        // -1 = don't play demos
    char        demos[MAX_DEMOS][MAX_DEMONAME];        // when not playing

// demo recording info must be here, because record is started before
// entering a map (and clearing client_state_t)
    qboolean    demorecording;
    qboolean    demoplayback;
    qboolean    timedemo;
    int            forcetrack;            // -1 = use normal cd track
    File        demofile;
    int            td_lastframe;        // to meter out one message a frame
    int            td_startframe;        // host_framecount at start
    float        td_starttime;        // realtime at second frame of timedemo


// connection information
    int            signon;            // 0 to SIGNONS
    struct qsocket_s    *netcon;
    sizebuf_t    message;        // writing buffer to send to server

} client_static_t;

extern client_static_t    cls;

//
// the client_state_t structure is wiped completely at every
// server signon
//
typedef struct
{
    int protocol_version;

    int            movemessages;    // since connecting to this server
                                // throw out the first couple, so the player
                                // doesn't accidentally do something the
                                // first frame
    usercmd_t    cmd;            // last command sent to the server

// information for local display
    int            stats[MAX_CL_STATS];    // health, etc
    int            items;            // inventory bit flags
    float    item_gettime[32];    // cl.time of aquiring item, for blinking
    float        faceanimtime;    // use anim frame if cl.time < this

    cshift_t    cshifts[NUM_CSHIFTS];    // color shifts for damage, powerups
    cshift_t    prev_cshifts[NUM_CSHIFTS];    // and content types

// the client maintains its own idea of view angles, which are
// sent to the server each frame.  The server sets punchangle when
// the view is temporarliy offset, and an angle reset commands at the start
// of each level and after teleporting.
    vec3_t        mviewangles[2];    // during demo playback viewangles is lerped
                                // between these
    vec3_t        viewangles;

    vec3_t        mvelocity[2];    // update by server, used for lean+bob
                                // (0 is newest)
    vec3_t        velocity;        // lerped between mvelocity[0] and [1]

    vec3_t        punchangle;        // temporary offset

// pitch drifting vars
    float        idealpitch;
    float        pitchvel;
    qboolean    nodrift;
    float        driftmove;
    double        laststop;

    float        viewheight;
    float        crouch;            // local amount for smoothing stepups

    qboolean    paused;            // send over by server
    qboolean    onground;
    qboolean    inwater;

    int            intermission;    // don't change view angle, full screen, etc
    int            completed_time;    // latched at intermission start

    double        mtime[2];        // the timestamp of last two messages
    double        time;            // clients view of time, should be between
                                // servertime and oldservertime to generate
                                // a lerp point for other data
    double        oldtime;        // previous cl.time, time-oldtime is used
                                // to decay light values and smooth step ups


    float        last_received_message;    // (realtime) for net trouble icon

//
// information that is static for the entire time connected to a server
//
    struct model_s        *model_precache[MAX_MODELS];
    unsigned sound_precache[MAX_SOUNDS];

    char        levelname[40];    // for display on solo scoreboard
    int            viewentity;        // cl_entitites[cl.viewentity] = player
    int            maxclients;
    int            gametype;

// refresh related state
    struct model_s    *worldmodel;    // cl_entitites[0].model
    struct efrag_s    *free_efrags;
    int            num_entities;    // held in cl_entities array
    int            num_statics;    // held in cl_staticentities array
    entity_t    viewent;            // the gun model

    int            cdtrack, looptrack;    // cd audio

// frag scoreboard
    scoreboard_t    *scores;        // [cl.maxclients]
} client_state_t;



#define    MAX_TEMP_ENTITIES    64            // lightning bolts, etc
#define    MAX_STATIC_ENTITIES    128            // torches, etc

extern    client_state_t    cl;

// FIXME, allocate dynamically
extern    efrag_t            cl_efrags[MAX_EFRAGS];
extern    entity_t        cl_entities[MAX_EDICTS];
extern    entity_t        cl_static_entities[MAX_STATIC_ENTITIES];
extern    lightstyle_t    cl_lightstyle[MAX_LIGHTSTYLES];
extern    dlight_t        cl_dlights[MAX_DLIGHTS];
extern    entity_t        cl_temp_entities[MAX_TEMP_ENTITIES];
extern    beam_t            cl_beams[MAX_BEAMS];

//=============================================================================

//
// cl_main
//
dlight_t *CL_AllocDlight (int key);
void    CL_DecayLights (void);

void CL_Init (void);

void CL_EstablishConnection(const std::string &host);
void CL_Signon1 (void);
void CL_Signon2 (void);
void CL_Signon3 (void);
void CL_Signon4 (void);

void CL_Disconnect (void);
void CL_Disconnect_f (void);
void CL_NextDemo (void);

#define            MAX_VISEDICTS    256
extern    int                cl_numvisedicts;
extern    entity_t        *cl_visedicts[MAX_VISEDICTS];

//
// cl_input
//
typedef struct
{
    int        down[2];        // key nums holding it down
    int        state;            // low bit is down state
} kbutton_t;

extern    kbutton_t    in_mlook, in_klook;
extern     kbutton_t     in_strafe;
extern     kbutton_t     in_speed;

void CL_InitInput (void);
void CL_SendCmd (void);
void CL_SendMove (usercmd_t *cmd);

void CL_ParseTEnt (void);
void CL_UpdateTEnts (void);

void CL_ClearState (void);


int  CL_ReadFromServer (void);
void CL_WriteToServer (usercmd_t *cmd);
void CL_BaseMove (usercmd_t *cmd);


float CL_KeyState (kbutton_t *key);
char *Key_KeynumToString (int keynum);

//
// cl_demo.c
//
void CL_StopPlayback (void);
int CL_GetMessage (void);

void CL_Stop_f (void);
void CL_Record_f (void);
void CL_PlayDemo_f (void);
void CL_TimeDemo_f (void);

//
// cl_parse.c
//
void CL_ParseServerMessage (void);
void CL_NewTranslation (int slot);

//
// view
//
void V_StartPitchDrift (void);
void V_StopPitchDrift (void);

void V_RenderView (void);
void V_UpdatePalette (void);
void V_Register (void);
void V_ParseDamage (void);
void V_SetContentsColor (int contents);


//
// cl_tent
//
void CL_InitTEnts (void);
void CL_SignonReply (void);
