#include "stdinclude.h"
#include "board.h"
#include "gamedb.h"
#include "command.h"
#include "playerdb.h"
#include "gameproc.h"
#include "obsproc.h"
#include "utils.h"
#include "common.h"
#include "config.h"

PUBLIC char *book_dir = DEFAULT_BOOK;

typedef struct {
  char ECO[4];
  char FENpos[80];
} ECO_entry;

typedef struct {
  char NIC[6];
  char FENpos[80];
} NIC_entry;

typedef struct {
  char LONG[80];
  char FENpos[80];
} LONG_entry;

ECO_entry *ECO_book[1096];
NIC_entry *NIC_book[1096];
LONG_entry *LONG_book[4096];

int ECO_entries, NIC_entries, LONG_entries;

char *boardToFEN(int g)
{
  int i,j;
  static char FENstring[80];
  int FENcount = 0;  
  int space = 0;

  for(i=7; i>=0; i--) {
    for(j=0; j<8; j++) {
      switch(garray[g].game_state.board[j][i]) {
      case W_PAWN:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='P';
        break;
      case W_ROOK:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='R';
        break;
      case W_KNIGHT:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='N';
        break;
      case W_BISHOP:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='B';
        break;
      case W_QUEEN:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='Q';
        break;
      case W_KING:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='K';
        break;
      case B_PAWN:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='p';
        break;
      case B_ROOK:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='r';
        break;
      case B_KNIGHT:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='n';
        break;
      case B_BISHOP:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='b';
        break;
      case B_QUEEN:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='q';
        break;
      case B_KING:
        if (space>0) {
          FENstring[FENcount++]=space+'0'; 
          space=0;
        }
        FENstring[FENcount++]='k';
        break;
      default:
        space++;
        break;
      }
    }
    if (space>0) {
      FENstring[FENcount++]=space+'0'; 
      space=0;
    }
    FENstring[FENcount++]='/';
  }
  FENstring[--FENcount]=' ';
  FENstring[++FENcount]=(garray[g].game_state.onMove==WHITE) ? 'w' : 'b';
  FENstring[++FENcount]='\0';
  return FENstring;
}

void ECO_init()
{
  FILE *fp;
  char tmp[1024];
  char *ptmp= tmp;
  char FENpos[73], ECO[4], onMove[2];
  char filename[1024];
  int i=0;

  sprintf(filename, "%s/eco999.idx", book_dir);
  fp= fopen(filename, "r");
  if (!fp) {
    fprintf(stderr, "Could not open ECO file (%s)\n", filename);
    exit(1);
  }
  while (!feof(fp)) {
    strcpy(ptmp, "");
    fgets(ptmp, 1024, fp);
    if (feof(fp)) continue;
    sscanf(ptmp, "%[\x21-z] %s", FENpos, onMove);
    sprintf(FENpos, "%s %s", FENpos, onMove);
    strcpy(ptmp, "");
    fgets(ptmp, 1024, fp);
    if (feof(fp)) continue;
    sscanf(ptmp, "%[0-z]", ECO);
    ECO_book[i]= (ECO_entry *) malloc(sizeof(ECO_entry));
    if (ECO_book[i]==NULL) {
      fprintf(stderr, "Cound not alloc mem for ECO entry %d.\n", i);
      exit(1);
    }
    strcpy(ECO_book[i]->ECO, ECO);
    strcpy(ECO_book[i]->FENpos, FENpos);
    ++i;
  }
  fclose(fp);
  ECO_book[i]=NULL;
  fprintf(stderr, "%d entries in ECO book\n", i);
  ECO_entries = i;
  
  while (--i >= 0)
    if (ECO_book[i] == NULL)
      fprintf(stderr, "ERROR!  ECO book position number %d is NULL.", i);
}

void NIC_init()
{
  FILE *fp;
  char tmp[1024];
  char *ptmp= tmp;
  char FENpos[73], NIC[6], onMove[2];  
  char filename[1024];
  int i=0;

  sprintf(filename, "%s/nic999.idx", book_dir);
  fp= fopen(filename, "r");
  if (!fp) {
    fprintf(stderr, "Could not open NIC file\n");
    exit(1);
  }
  while (!feof(fp)) {
    strcpy(ptmp, "");
    fgets(ptmp, 1024, fp);
    if (feof(fp)) continue;
    sscanf(ptmp, "%[\x21-z] %s", FENpos, onMove);
    sprintf(FENpos, "%s %s", FENpos, onMove);
    strcpy(ptmp, "");
    fgets(ptmp, 1024, fp);
    if (feof(fp)) continue;
    sscanf(ptmp, "%[.-z]", NIC);
    NIC_book[i]= (NIC_entry *) malloc(sizeof(NIC_entry));
    if (NIC_book[i]==NULL) {
      fprintf(stderr, "Cound not alloc mem for NIC entry %d.\n", i);
      exit(1);
    }
    strcpy(NIC_book[i]->NIC, NIC);
    strcpy(NIC_book[i]->FENpos, FENpos);
    ++i;
  }
  fclose(fp);
  NIC_book[i]=NULL;
  fprintf(stderr, "%d entries in NIC book\n", i);
  NIC_entries = i;
}

void LONG_init()
{
  FILE *fp;
  char tmp[1024];
  char *ptmp= tmp;
  char FENpos[73], LONG[256], onMove[2];  
  char filename[1024];
  int i=0;

  sprintf(filename, "%s/long999.idx", book_dir);
  fp= fopen(filename, "r");
  if (!fp) {
    fprintf(stderr, "Could not open LONG file\n");
    exit(1);
  }
  while (!feof(fp)) {
    strcpy(ptmp, "");
    fgets(ptmp, 1024, fp);
    if (feof(fp)) continue;
    sscanf(ptmp, "%[\x21-z] %s", FENpos, onMove);
    sprintf(FENpos, "%s %s", FENpos, onMove);
    strcpy(ptmp, "");
    fgets(ptmp, 1024, fp);
    if (feof(fp)) continue;
    sscanf(ptmp, "%[^*\n]", LONG);
    LONG_book[i]= (LONG_entry *) malloc(sizeof(LONG_entry));
    if (LONG_book[i]==NULL) {
      fprintf(stderr, "Cound not alloc mem for LONG entry %d.\n", i);
      exit(1);
    }
    strcpy(LONG_book[i]->LONG, LONG);
    strcpy(LONG_book[i]->FENpos, FENpos);
    ++i;
  }
  fclose(fp);
  LONG_book[i]=NULL;
  fprintf(stderr, "%d entries in LONG book\n", i);
  LONG_entries = i;
}

void BookInit()
{
  ECO_init();
  NIC_init(); 
  LONG_init(); 
}

char *getECO(int g)
{
  static char ECO[4];

#ifndef IGNORE_ECO

  int i, flag, l = 0, r = ECO_entries - 1, x;


  if ((parray[garray[g].white].private) || (parray[garray[g].black].private)) {
    strcpy(ECO, "---");
    return ECO;
  } else {
    if (garray[g].type == TYPE_WILD) {
      strcpy(ECO, "---");
      return ECO;
    } else if (garray[g].moveList == NULL) {
      strcpy(ECO, "***");
      return ECO;
    } else {
      strcpy(ECO, "A00");
    }
  }

  for (flag=0,i=garray[g].numHalfMoves; (i>0 && !flag); i--) {
    l = 0;
    r = ECO_entries - 1;
    while ((r >= l) && !flag) {
      x = (l+r)/2;
      if ((strcmp(garray[g].moveList[i].FENpos, ECO_book[x]->FENpos)) < 0)
	r = x - 1;
      else
	l = x + 1;
      if (!strcmp(garray[g].moveList[i].FENpos, ECO_book[x]->FENpos)) {
        strcpy(ECO, ECO_book[x]->ECO);
        flag=1;
      }
    }
  }
#else

  strcpy(ECO, "---");

#endif


  return ECO;
}

PUBLIC int com_eco(int p, param_list param)
{

#ifndef IGNORE_ECO

  int i, flag = 0, x, l, r;
  int g1, p1;


  if (param[0].type == TYPE_NULL) {  /* own game */
    if (parray[p].game < 0) {
      pprintf(p, "You are not playing or examining a game.\n");
      return COM_OK;
    }
    g1=parray[p].game;
    if (garray[g1].status != GAME_EXAMINE && !pIsPlaying(p))
      return COM_OK;
  } else {
    g1 = GameNumFromParam (p, &p1, &param[0]);
    if (g1 < 0) return COM_OK;
    if ((g1 >= g_num) || ((garray[g1].status != GAME_ACTIVE) &&
        (garray[g1].status != GAME_EXAMINE))) {
      pprintf(p, "There is no such game.\n");
      return COM_OK;
    }
  }

  if ((((parray[garray[g1].white].private) || 
       (parray[garray[g1].black].private))) &&
       (parray[p].adminLevel==0)) {
    pprintf(p, "Sorry - that game is private.\n");
    return COM_OK;
  } else {
    if (garray[g1].type == TYPE_WILD) {
      pprintf(p, "That game is a wild game.\n");
      return COM_OK;      
    }
  }
      
  pprintf(p, "Info about game %d: \"%s vs. %s\"\n\n", g1+1, 
              garray[g1].white_name,    
              garray[g1].black_name);

  if (garray[g1].moveList==NULL) {
    return COM_OK;
  }

  for (flag=0,i=garray[g1].numHalfMoves; (i>0 && !flag); i--) {
    l = 0;
    r = ECO_entries - 1;
    while ((r >= l) && !flag) {
      x = (l+r)/2;
      if ((strcmp(garray[g1].moveList[i].FENpos, ECO_book[x]->FENpos)) < 0)
	r = x - 1;
      else
	l = x + 1;
      if (!strcmp(garray[g1].moveList[i].FENpos, ECO_book[x]->FENpos)) {
        pprintf(p, "  ECO[%3d]: %s\n", i, ECO_book[x]->ECO);
        flag=1;
      }
    }
  }

  for (flag=0, i=garray[g1].numHalfMoves; ((i>0) && (!flag)); i--) {
    l = 0;
    r = NIC_entries - 1;
    while ((r >=l) && !flag) {
      x = (l+r)/2;
      if ((strcmp(garray[g1].moveList[i].FENpos, NIC_book[x]->FENpos)) < 0)
	r = x - 1;
      else
	l = x + 1;
      if (!strcmp(garray[g1].moveList[i].FENpos, NIC_book[x]->FENpos)) {
        pprintf(p, "  NIC[%3d]: %s\n", i, NIC_book[x]->NIC);
        flag=1;
      }
    }
  }

  for (flag=0, i=garray[g1].numHalfMoves; ((i>0) && (!flag)); i--) {
    l = 0;
    r = LONG_entries - 1;
    while ((r >=l) && !flag) {
      x = (l+r)/2;
      if ((strcmp(garray[g1].moveList[i].FENpos, LONG_book[x]->FENpos)) < 0)
	r = x - 1;
      else
	l = x + 1;
      if (!strcmp(garray[g1].moveList[i].FENpos, LONG_book[x]->FENpos)) {
        pprintf(p, " LONG[%3d]: %s\n", i, LONG_book[x]->LONG);
        flag=1;
      }
    }
  }

#else

  pprintf(p, "ECO not available...  out of service!.\n");

#endif

  return COM_OK;
}