/**************************************************************************
*  file: SYNTAX_CHECKER.c , Check syntax of all files     Part of DIKUMUD *
*  Usage: QUICK AND DIRTY!!                                               *
*  Copyright (C) 1990, 1991 - see 'license.doc' for complete information. *
***************************************************************************/

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <time.h>

#include "structs.h"
#include "utils.h"
#include "db.h"
#include "comm.h"
#include "handler.h"
#include "limits.h"

/**************************************************************************
*  declarations of most of the 'global' variables                         *
************************************************************************ */

struct room_data *world;              /* dyn alloc'ed array of rooms     */
int top_of_world = 0;                 /* ref to the top element of world */
struct obj_data  *object_list = 0;    /* the global linked list of obj's */
struct char_data *character_list = 0; /* global l-list of chars          */

struct zone_data *zone_table;         /* table of reset data             */
int top_of_zone_table = 0;
struct message_list fight_messages[MAX_MESSAGES]; /* fighting messages   */
struct player_index_element *player_table = 0; /* index to player file   */
int top_of_p_table = 0;               /* ref to top of table             */
int top_of_p_file = 0;

FILE *mob_f,                          /* file containing mob prototypes  */
     *obj_f,                          /* obj prototypes                  */
     *wld_f,                          /* World file                      */
     *zon_f;

struct index_data *mob_index;         /* index table for mobile file     */
struct index_data *obj_index;         /* index table for object file     */
struct index_data *wld_index;

struct help_index_element *help_index = 0;

int top_of_mobt = 0;                  /* top of mobile index table       */
int top_of_objt = 0;                  /* top of object index table       */
int top_of_wldt = 0;

struct time_data time_info;    /* the infomation about the time   */
struct weather_data weather_info;  /* the infomation about the weather */




/* local procedures */
void boot_zones(void);
void setup_dir(FILE *fl, int room, int dir);
void allocate_room(int new_top);
void boot_world(void);
struct index_data *generate_indices(FILE *fl, int *top);
void build_player_index(void);
void char_to_store(struct char_data *ch, struct char_file_u *st);
void store_to_char(struct char_file_u *st, struct char_data *ch);
int is_empty(int zone_nr);
void reset_zone(int zone);
int file_to_string(char *name, char *buf);
void renum_world(void);
void renum_zone_table(void);
void reset_time(void);
void clear_char(struct char_data *ch);


/*************************************************************************
*  routines for booting the system                                       *
*********************************************************************** */


void assume(int faktisk, int antal, int place, char *errmsg)
{
  if (antal != faktisk) {
    printf("Error has occured at #%d.\n\r", place);
    printf("Message is : %s\n\r", errmsg);
    printf("Actual number read is %d\n\r", faktisk);
    exit();
  }
}


/* generate index table for object, monster or world file*/
struct index_data *generate_indices(FILE *fl, int *top)
{
  int i = 0, antal;
  struct index_data *index;
  long pos;
  char buf[82];

  rewind(fl);

  for (;;)
  {
    if (fgets(buf, 81, fl))
    {
      if (*buf == '#')
      {
        /* allocate new cell */
        
        if (!i)             /* first cell */
          CREATE(index, struct index_data, 1);
        else
          if (!(index = 
            (struct index_data*) realloc(index, 
            (i + 1) * sizeof(struct index_data))))
          {
            printf("load indices");
            exit();
           }
        antal = sscanf(buf, "#%d", &index[i].virtual);
        assume(antal, 1, index[i].virtual, "Next string with E/A/$");

        index[i].pos = ftell(fl);
        index[i].number = index[i].virtual;
        index[i].func = 0;
        i++;
      }
      else 
        if (*buf == '$')  /* EOF */
          break;
    }
    else
    {
      printf("Error when generating index, based upon #xxxx numbers.\n\r");
      printf("   Probably error at end of file.\n\r");

      exit();
    }
  }
  index[i-1].number = -1;
  *top = i - 1;
  return(index);
}

int exist_index(struct index_data *index_list, int top, int num)
{
  int i, found;

  found = FALSE;

  for(i=0; (i<=top) && !(found); i++)
    if (index_list[i].number == num)
      found = TRUE;

  if (!found) {
    printf("Reference to non-existent number #%d\n\r", num);
  }

  return (found);
}


/* check the rooms */
void check_world(FILE *fl)
{
  int room_nr = 0, zone = 0, dir_nr, virtual_nr, flag, tmp, old_virtual;
  char *temp, chk[50];
  struct extra_descr_data *new_descr;

  int antal;
  char *temp2;

  world = 0;
  character_list = 0;
  object_list = 0;

  rewind(fl);

  old_virtual = -1;


  do
  {
    antal = fscanf(fl, " #%d\n", &virtual_nr);
    assume(antal,1, virtual_nr, "Reading #xxx");

    if (old_virtual > virtual_nr)
      assume(0,1,virtual_nr, "Error - #'s not in order.");
    old_virtual = virtual_nr;

    temp = fread_string(fl);
    if (flag = (*temp != '$'))  /* a new record to be read */
    {
      temp2 = fread_string(fl);

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal,1, virtual_nr, "In room basic 3 numbers");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal,1, virtual_nr, "In room basic 3 numbers");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal,1, virtual_nr, "In room basic 3 numbers");

      for (;;)
      {
        antal = fscanf(fl, " %s \n", chk);
        assume(antal,1, virtual_nr, "Reading D/E/S string");

        if (*chk == 'D')  /* direction field */
          setup_dir(fl, virtual_nr, atoi(chk + 1));
        else if (*chk == 'E')  /* extra description field */
        {
          temp2 = fread_string(fl); /* Description */
          temp2 = fread_string(fl); /* Keywords    */
        }
        else if (*chk == 'S')  /* end of current room */
          break;
        else
          assume(FALSE, 0, virtual_nr, "MISSING D/E or S");
      }
            
    }
  }
  while (flag);
}




/* read direction data */
void setup_dir(FILE *fl, int room, int dir)
{
  int tmp, antal;
  char *temp;

  temp = fread_string(fl);
  temp = fread_string(fl);

  antal = fscanf(fl, " %d ", &tmp);
  assume(antal,1, room, "One of three Direction data");
  antal = fscanf(fl, " %d ", &tmp);
  assume(antal,1, room, "One of three Direction data");
  antal = fscanf(fl, " %d ", &tmp);
  assume(antal,1, room, "One of three Direction data");
  exist_index(wld_index, top_of_wldt, tmp);

}


#define NEW_ZONE_SYSTEM xxx

/* load the zone table and command tables */
void check_zones(FILE *fl)
{
  int line_no;
  int antal, tmp1, tmp2, tmp3, tmp4;
  int zon = 0, cmd_no = 0, ch, expand;
  char *check, buf[81];
  char cmd_type;

  rewind(fl);
  line_no=1;

  for (;;)
  {
    antal = fscanf(fl, " #%*d\n");
    assume(antal, 0, line_no++, "Zone number not found");

    check = fread_string(fl);
    line_no++;

    if (*check == '$')
      break;    /* end of file */

    /* alloc a new zone */

#ifdef NEW_ZONE_SYSTEM
    antal = fscanf(fl, " %d ", &zon);
    assume(antal, 1, line_no, "Zone Room < number not found");
#endif

    antal = fscanf(fl, " %d ", &zon);
    assume(antal, 1, line_no, "Life Span");

    antal = fscanf(fl, " %d ", &zon);
    assume(antal, 1, line_no++, "Reset Mode");


    /* read the command table */

    cmd_no = 0;

    for (expand = 1;;)
    {

      fscanf(fl, " "); /* skip blanks */
      antal = fscanf(fl, "%c", &cmd_type);
      assume(antal, 1, line_no, "Command type M/*/O/G/E/S missing");
      
      if (cmd_type == 'S')
        break;

      if (cmd_type == '*')
      {
        expand = 0;
        fgets(buf, 80, fl); /* skip command */
        line_no++;
        continue;
      }

      antal = fscanf(fl, " %d %d %d", &tmp1, &tmp2, &tmp3);
      if(antal != 3){
         fprintf(stderr,"%s\n",buf);
      }
      assume(antal, 3, line_no, "Three values after command missing");
      if (cmd_type == 'M' || cmd_type == 'O' ||
          cmd_type == 'D' || cmd_type == 'P') {
        antal = fscanf(fl, " %d", &tmp4);
        assume(antal, 1, line_no, "Fourth value after command missing");
      }

      switch (cmd_type) {
        case 'M' :
          exist_index(mob_index, top_of_mobt, tmp2);
          exist_index(wld_index, top_of_wldt, tmp4);
          break;
        case 'O' :
          exist_index(obj_index, top_of_objt, tmp2);
          exist_index(wld_index, top_of_wldt, tmp4);
          break;
        case 'G' :
          exist_index(obj_index, top_of_objt, tmp2);
          break;
        case 'E' :
          exist_index(obj_index, top_of_objt, tmp2);
          break;
        case 'P' :
          exist_index(obj_index, top_of_objt, tmp2);
          exist_index(obj_index, top_of_objt, tmp4);
          break;
        case 'D' :
          exist_index(wld_index, top_of_wldt, tmp2);
          break;
        case 'R' :
          exist_index(wld_index, top_of_wldt, tmp2);
          exist_index(obj_index, top_of_objt, tmp3);
          break;
        case '*' :
          break;
        deafult  :
          printf("Illegal command type");
          exit();
          break;
      }
          

      fgets(buf, 80, fl);  /* read comment */
      line_no++;
    }
  }
}
 




/*************************************************************************
*  procedures for resetting, both play-time and boot-time      *
*********************************************************************** */


/* read a mobile from MOB_FILE */
void check_mobile(FILE *fl)
{
  int virtual_nr, old_virtual, antal, flag;
  int x1,x2,x3,x4,x5,x6;
  char *temp;
  char bogst;

  int i, skill_nr;
  long tmp, tmp2, tmp3;
  struct char_data *mob;
  char chk[10];


  old_virtual = -1;

  rewind(fl);

  do {
    antal = fscanf(fl, " #%d\n", &virtual_nr);
    assume(antal,1, virtual_nr, "Reading #xxx");

    if (old_virtual > virtual_nr)
      assume(0,1,virtual_nr, "Error - #'s not in order.");

    old_virtual = virtual_nr;

    temp = fread_string(fl);  /* Namelist */
    if (flag = (*temp != '$')) {  /* a new record to be read */

      /***** String data *** */
      /* Name already read mob->player.name = fread_string(fl); */
      temp = fread_string(fl);  /* short description  */
      temp = fread_string(fl);  /*long_description    */
      temp = fread_string(fl);  /* player.description */

      /* *** Numeric data *** */

      antal = fscanf(fl, "%d ", &tmp);
      assume(antal, 1, virtual_nr, "ACT error");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "affected_by error");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "Monster Alignment Error");

      antal = fscanf(fl, " %c \n", &bogst);
      assume(antal, 1, virtual_nr, "Simple/Detailed error");

      if((bogst!='S')&&(bogst!='X'))
        printf("%c %d\n", bogst, bogst);

      if((bogst == 'S')||(bogst == 'X')) {
        /* The new easy monsters */

        if(bogst == 'X'){
          fscanf(fl,"%D %D %D %D %D %D",&x1,&x2,&x3,&x4,&x5,&x6);
          printf("Special Mob: %d %d %d %d %d %d\n",x1,x2,x3,x4,x5,x6);
        }
        antal = fscanf(fl, " %D ", &tmp);
        assume(antal, 1, virtual_nr, "Level error");
    
        antal = fscanf(fl, " %D ", &tmp);
        assume(antal, 1, virtual_nr, "THAC0 error");
    
        antal = fscanf(fl, " %D ", &tmp);
        assume(antal, 1, virtual_nr, "AC error");

        antal = fscanf(fl, " %Dd%D+%D ", &tmp, &tmp2, &tmp3);
        assume(antal, 3, virtual_nr, "Hitpoints");

        antal = fscanf(fl, " %Dd%D+%D \n", &tmp, &tmp2, &tmp3);
        assume(antal, 3, virtual_nr, "Damage error");

        antal = fscanf(fl, " %D ", &tmp);
        assume(antal, 1, virtual_nr, "GOLD error");

        antal = fscanf(fl, " %D \n", &tmp);
        assume(antal, 1, virtual_nr, "XP error");

        antal = fscanf(fl, " %D ", &tmp);
        assume(antal, 1, virtual_nr, "POSITION error");

        antal = fscanf(fl, " %D ", &tmp);
        assume(antal, 1, virtual_nr, "DEFAULT POS error");

        antal = fscanf(fl, " %D \n", &tmp);
        assume(antal, 1, virtual_nr, "SEXY error");

    } else {  /* The old monsters are down below here */

      printf("detail char=%c\n",bogst);
      printf("Detailed monsters can't be syntax-checked (yet).\n\r");
      assume(0,1,virtual_nr, "DETAIL ERROR");

      exit();
      /*   ***************************
      fscanf(fl, " %D ", &tmp);
      mob->abilities.str = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->abilities.intel = tmp; 

      fscanf(fl, " %D ", &tmp);
      mob->abilities.wis = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->abilities.dex = tmp;

      fscanf(fl, " %D \n", &tmp);
      mob->abilities.con = tmp;

      fscanf(fl, " %D ", &tmp);
      fscanf(fl, " %D ", &tmp2);

      mob->points.max_hit = 0;
      mob->points.hit = mob->points.max_hit;

      fscanf(fl, " %D ", &tmp);
      mob->points.armor = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->points.mana = tmp;
      mob->points.max_mana = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->points.move = tmp;    
      mob->points.max_move = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->points.gold = tmp;

      fscanf(fl, " %D \n", &tmp);
      GET_EXP(mob) = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->specials.position = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->specials.default_pos = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->player.sex = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->player.class = tmp;

      fscanf(fl, " %D ", &tmp);
      GET_LEVEL(mob) = tmp;

      fscanf(fl, " %D ", &tmp);
      mob->player.birth.hours = time_info.hours;
      mob->player.birth.day  = time_info.day;
      mob->player.birth.month = time_info.month;
      mob->player.birth.year  = time_info.year - tmp;

      fscanf(fl, " %D ", &tmp);
      mob->player.weight = tmp;

      fscanf(fl, " %D \n", &tmp);
      mob->player.height = tmp;

      for (i = 0; i < 3; i++)
      {
        fscanf(fl, " %D ", &tmp);
        GET_COND(mob, i) = tmp;
      }
      fscanf(fl, " \n ");

      for (i = 0; i < 5; i++)
      {
        fscanf(fl, " %D ", &tmp);
        mob->specials.apply_saving_throw[i] = tmp;
      }

      fscanf(fl, " \n ");
      mob->points.damroll = 0;
      mob->specials.damnodice = 1;
      mob->specials.damsizedice = 6;

      mob->points.hitroll = 0;
      ************************************* */
    }

    }
  }
  while (flag);

}


/* read an object from OBJ_FILE */
void check_objects(FILE *fl)
{
  int virtual_nr, old_virtual, antal, flag;
  char *temp;

  struct obj_data *obj;
  int tmp, i;
  char chk[256];
  struct extra_descr_data *new_descr;

  old_virtual = -1;

  rewind(fl);

  antal = fscanf(fl, " %s \n", chk);
  assume(antal, 1, virtual_nr, "First #xxx number");

  do {
    antal = sscanf(chk, " #%d\n", &virtual_nr);
    assume(antal,1, virtual_nr, "Reading #xxx");

    if (old_virtual > virtual_nr)
      assume(0,1,virtual_nr, "Error - #'s not in order.");

    old_virtual = virtual_nr;

    temp = fread_string(fl);  /* Namelist */
    if (flag = (*temp != '$')) {  /* a new record to be read */

      /* *** string data *** */

      /* temp = fread_string(fl);  name has been read above */
      temp = fread_string(fl); /* short */
      temp = fread_string(fl); /* descr */
      temp = fread_string(fl); /* action */

      /* *** numeric data *** */

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "Error reading type flag");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "Extra Flag");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "wear_flags");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "value[0]");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "value[1]");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "value[2]");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "value[3]");

      antal = fscanf(fl, " %d ", &tmp);
      assume(antal, 1, virtual_nr, "Weight");

      antal = fscanf(fl, " %d \n", &tmp);
      assume(antal, 1, virtual_nr, "Cost");

      antal = fscanf(fl, " %d \n", &tmp);
      assume(antal, 1, virtual_nr, "Cost Per Day");

      /* *** extra descriptions *** */

      while (fscanf(fl, " %s \n", chk), *chk == 'E')
      {

        temp = fread_string(fl);
        temp = fread_string(fl);
      }

      for( i = 0 ; (i < MAX_OBJ_AFFECT) && (*chk == 'A') ; i++)
      {
        antal = fscanf(fl, " %d ", &tmp);
        assume(antal, 1, virtual_nr, "affected location");

        antal = fscanf(fl, " %d \n", &tmp);
        assume(antal, 1, virtual_nr, "Modifier");

        antal = fscanf(fl, " %s \n", chk);
        assume(antal, 1, virtual_nr, "Next string with E/A/$");

      }
    }
  }
  while (flag);
}




/************************************************************************
*  procs of a (more or less) general utility nature      *
********************************************************************** */


/* read and allocate space for a '~'-terminated string from a given file */
char *fread_string(FILE *fl)
{
  static char buf[MAX_STRING_LENGTH], tmp[100];
  char *rslt;
  register char *point;
  int flag;

  memset(buf, 0, MAX_STRING_LENGTH);

  do
  {
    if (!fgets(tmp, MAX_STRING_LENGTH, fl))
    {
      printf("fread_str");
      exit();
    }

    if (strlen(tmp) + strlen(buf) > MAX_STRING_LENGTH)
    {
      printf("fread_string: string too large (db.c, fread_string)");
      exit();
    }
    else
      strcat(buf, tmp);

    for (point = buf + strlen(buf) - 2; point >= buf && isspace(*point);
      point--);    
    if (flag = (*point == '~'))
      if (*(buf + strlen(buf) - 3) == '\n')
      {
        *(buf + strlen(buf) - 2) = '\r';
        *(buf + strlen(buf) - 1) = '\0';
      }
      else
        *(buf + strlen(buf) -2) = '\0';
    else
    {
      *(buf + strlen(buf) + 1) = '\0';
      *(buf + strlen(buf)) = '\r';
    }
  }
  while (!flag);

  return(buf);
}


int main(int argc, char *argv[])
{

  char name[256];

  if (argc != 2) {
    printf("Usage : syntax_check <BaseFileName>\n\r");
    exit(0);
  }

  strcpy(name, argv[1]);
  strcat(name, ".wld");

  if (!(wld_f = fopen(name, "r")))
  {
    printf("Could not open world file.\n\r");
    exit();
  }
  strcpy(name, argv[1]);
  strcat(name, ".mob");
  if (!(mob_f = fopen(name, "r")))
  {
    printf("Could not open mobile file.\n\r");
    exit();
  }
  strcpy(name, argv[1]);
  strcat(name, ".obj");
  if (!(obj_f = fopen(name, "r")))
  {
    printf("Could not open object file.\n\r");
    exit();
  }
  strcpy(name, argv[1]);
  strcat(name, ".zon");
  if (!(zon_f = fopen(name, "r")))
  {
    printf("Could not open zone file.\n\r");
    exit();
  }

  
  printf("Generating world file indexes.\n\r");
  wld_index = generate_indices(wld_f, &top_of_wldt);

  printf("Generating mobile file indexes.\n\r");
  mob_index = generate_indices(mob_f, &top_of_mobt);

  printf("Generating object file indexes.\n\r");
  obj_index = generate_indices(obj_f, &top_of_objt);

  printf("Checking World File\n\r");
  check_world(wld_f);

  printf("Checking Mobile File (only simple mobiles).\n\r");
  check_mobile(mob_f);

  printf("Checking Object File.\n\r");
  check_objects(obj_f);

  printf("Checking Zone File .\n\r");
  check_zones(zon_f);

  printf("\n\r\nCheck successfully completed without any obvious errors.\n\r");

  fclose(zon_f);
  fclose(wld_f);
  fclose(mob_f);
  fclose(obj_f);
}