/******************************************************************
 Joystick configuration utility for David Firth's Atari800 emulator
 22.5.1998 Robert Golias   (golias@fi.muni.cz)
 ******************************************************************/
#include <stdio.h>
#include <stdarg.h>
#include <strings.h>

#include <go32.h>
#include <sys/farptr.h>
#include <dpmi.h>
#include <pc.h>
#include <conio.h>

#include "pcjoy.h"

/*color attributes*/
#define BACKGROUND 0x10
#define MENUHEADER 0xe
#define MENUITEM 0xb
#define MENUSELECT 0x0f
#define TITLE 0xf

char joysticks[JOYSTICKTYPES][21]={"Off","PC Analog joystick",
                       "LPT1 joystick","LPT2 joystick","LPT3 joystick",
                       "Keyset 0","Keyset 1","Keyset 2","Keyset 3"};

int joytypes[4]={joy_keyset0,joy_keyset1,0,0};
/*note: keyset order: fire, downleft, down, downright, left, right, upleft, up, upright*/
int keysets[4][9]={ {82,79,80,81,75,77,71,72,73},
                    {15,44,45,46,30,32,16,17,18},
                    {255,255,255,255,255,255,255,255,255},
                    {255,255,255,255,255,255,255,255,255}};

char keynames[256][11]={
/*keys 0-127 = normal scancodes*/
      "none","ESC","1","2","3","4","5","6",
      "7","8","9","0","-","+","Backspace","Tab",
      "Q","W","E","R","T","Y","U","I",
      "O","P","[","]","Enter","L Ctrl","A","S",
      "D","F","G","H","J","K","L",";",
      "\"","`","L Shift","\\","Z","X","C","V",
      "B","N","M",",",".","/","R Shift","Num *",
      "L Alt","Space","CapsLock","F1","F2","F3","F4","F5",
      "F6","F7","F8","F9","F10","NumLock","ScrLock","Num Home",
      "Num Up","Num PgDn","Num -","Num Left","Num 5","Num Right","Num +","Num End",
      "Num Down","Num PgDn","Num Ins","Num Del","Alt+PrScr","?","?","F11",
      "F12","?","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","?",
/*keys 127 - 255 = extended scancodes (preceeded with 0xe0) */
      "?","?","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","?",
      "?","?","?","?","Num Enter","R Ctrl","?","?",
      "?","?","?","?","?","?","?","PrScr",
      "?","?","#","?","?","?","?","?",
      "?","?","?","?","?","Num /","?","PrScr",
      "R Alt","?","?","?","?","?","?","?",
      "?","?","?","?","?","Pause","?","Gray Home",
      "Gray Up","Gray PgUp","?","Gray Left","?","Gray Right","?","Gray End",
      "Gray Down","Gray PgDn","Gray Ins","Gray Del","?","?","?","?",
      "?","?","?","?","?","?","?","?",
      "#","#","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","?",
      "?","?","?","?","?","?","?","none"
  };
/* Note:  "?" = unknown combination
          "#" = special prefix, ignore  (like 0xe0 0xaa with Shift+Insert)
          "@" = known, but unusable
*/

/*-----------------------------------------------------------------------*/

void Screen(char *title,int attr)
{
  int i;
  window(1,1,80,25);
  textattr(attr);
  clrscr();
  gotoxy(1,1);
  cputs("Ŀ");
  for (i=2;i<24;i++)
  {
    gotoxy(1,i);cputs("");
    gotoxy(80,i);cputs("");
  }
  gotoxy(1,3);
  cputs("Ĵ");
  gotoxy(1,24);
  cputs("");
  gotoxy((80-strlen(title))/2,2);
  cputs(title);
  window(2,4,79,23);
}

int SelectItem(char *title,int *selection,int background,...)
{
  va_list params;
  int y;
  int i,pos;
  char *text[20];
  int lines;
  int key;

  lines=0;
  va_start(params,background);
  while (lines<20 && (text[lines]=va_arg(params,char*))!=NULL)
    lines++;
  va_end(params);

  clrscr();
  y=(20-lines)/2+2;
  gotoxy((78-strlen(title))/2,y-1);
  textattr(background+MENUHEADER);
  cputs(title);
  textattr(background+MENUITEM);
  for (i=0;i<lines;i++)
  {
     gotoxy((78-strlen(text[i]))/2,y+1+i);
     if (*text[i]!='-') cputs(text[i]);
  }
  pos=*selection;
  while (*text[pos]=='-') pos++;

  do{
    textattr(MENUSELECT);
    gotoxy((78-strlen(text[pos]))/2,y+1+pos);
    cputs(text[pos]);
    while (!kbhit());
    textattr(background+MENUITEM);
    gotoxy((78-strlen(text[pos]))/2,y+1+pos);
    cputs(text[pos]);
    key=getch();
    if (key==0) key=256+getch();
    switch(key)
    {
      case 0x148: /*Up*/
        do{
          pos--;
          if (pos==-1) pos=lines-1;
        }while (*text[pos]=='-');
        break;
      case 0x150: /*Down*/
        do{
          pos++;
          if (pos==lines) pos=0;
        }while (*text[pos]=='-');
        break;
      case 0x147: /*Home*/
        pos=0;
        while (*text[pos]=='-') pos++;
        break;
      case 0x14f: /*End*/
        pos=lines-1;
        while (*text[pos]=='-') pos--;
        break;
      case 0x149: /*PgUp*/
        if (pos>1) pos-=2;
        while (pos>0 && *text[pos]!='-') pos--;
        if (pos!=0) pos++;
        while (*text[pos]=='-') pos++;
        break;
      case 0x151: /*PgDn*/
        while (pos<lines-1 && *text[pos]!='-') pos++;
        if (pos<lines-1) pos++;
        while (*text[pos]=='-') pos--;
        break;
    }
  }while (key!=27 && key!=13 && key!=0x14d && key!=0x14b);

  *selection=pos;
  return key;
}
/*------------------------------------------------------------------------*/

_go32_dpmi_seginfo old_key_handler, new_key_handler;
volatile unsigned char raw_key=0;
volatile int ext=0,left,key;
volatile int hi,lo;
volatile int buffer[100];

void key_handler(void)
{
	asm("cli; pusha");
	raw_key = inportb(0x60);
        if (ext==2) ext=1;else /*ext 2 is used for pause*/
        if (ext==1)
        {
            left=raw_key&0x80;
            key=(raw_key&0x7f)+128;
            buffer[hi++]=key+(left<<8);
            if (hi==100) hi=0;
            ext=0;
        } else
        {
          key=raw_key&0x7f;
          left=raw_key&0x80;
          switch(raw_key)
          {
            case 0xe1:ext=2;break;
            case 0xe0:ext=1;break;
            default:
              buffer[hi++]=key+(left<<8);
              if (hi==100) hi=0;
          }
        }
	outportb(0x20, 0x20);
	asm("popa; sti");
}

void key_init(void)
{
        lo=hi=0;
	new_key_handler.pm_offset = (int) key_handler;
	new_key_handler.pm_selector = _go32_my_cs();
	_go32_dpmi_get_protected_mode_interrupt_vector(0x9, &old_key_handler);
	_go32_dpmi_allocate_iret_wrapper(&new_key_handler);
	_go32_dpmi_set_protected_mode_interrupt_vector(0x9, &new_key_handler);
}
void key_done(void)
{
	_go32_dpmi_set_protected_mode_interrupt_vector(0x9, &old_key_handler);
}

/*------------------------------------------------------------------------*/
int pressed[256];
void showjoy(int x,int y,int num)
{
  textattr(BACKGROUND+MENUITEM);
  gotoxy(x,y);
  cprintf("Keyset %i",num);
  gotoxy(x+1,y+2);
  cputs("\\ | /");
  gotoxy(x+1,y+3);
  cputs("-   -");
  gotoxy(x+1,y+4);
  cputs("/ | \\");
  textattr(BACKGROUND+MENUHEADER);
  gotoxy(x+3,y+3);putch(pressed[keysets[num][0]]?'@':' ');
  gotoxy(x,y+5);putch(pressed[keysets[num][1]]?'@':' ');
  gotoxy(x+3,y+5);putch(pressed[keysets[num][2]]?'@':' ');
  gotoxy(x+6,y+5);putch(pressed[keysets[num][3]]?'@':' ');
  gotoxy(x,y+3);putch(pressed[keysets[num][4]]?'@':' ');
  gotoxy(x+6,y+3);putch(pressed[keysets[num][5]]?'@':' ');
  gotoxy(x,y+1);putch(pressed[keysets[num][6]]?'@':' ');
  gotoxy(x+3,y+1);putch(pressed[keysets[num][7]]?'@':' ');
  gotoxy(x+6,y+1);putch(pressed[keysets[num][8]]?'@':' ');
}
void testcollisions()
{
  int i;

  clrscr();
  textattr(BACKGROUND+MENUITEM);
  gotoxy((78-24)/2,3);
  cputs("Test keyboard collisions");
  gotoxy((78-61)/2,5);
  cputs("Here you can test, if the keys you've choosen do not collide.");
  gotoxy((78-43)/2,6);
  cputs("(only few keyboards allow all combinations)");
  gotoxy((78-18)/2,8);
  cputs("Press ESC to exit.");
  for (i=0;i<256;i++) pressed[i]=0;
  key_init();
  do{
    showjoy(17,12,0);
    showjoy(29,12,1);
    showjoy(41,12,2);
    showjoy(53,12,3);
    while (hi==lo);
    pressed[buffer[lo]&0xff]=buffer[lo]<0x100;
    lo++;
    if (lo==100) lo=0;
  }while(!pressed[1]);
  /*wait until ESC is depressed*/
  do{
    while (hi==lo);
    pressed[buffer[lo]&0xff]=buffer[lo]<0x100;
    lo++;
    if (lo==100) lo=0;
  }while(pressed[1]);
  key_done();
}
/*------------------------------------------------------------------------*/
int choosekey(char *title,int oldval)
{
  char msg[80];
  int lastkey;
  int newval;
  int bad;

  clrscr();
  sprintf(msg,"Press key for %s",title);
  gotoxy((78-strlen(msg))/2,8);
  cputs(msg);
  gotoxy(34,9);
  cputs("(ESC=none)");
  sprintf(msg,"Current setting: %s",keynames[oldval]);
  gotoxy((78-strlen(msg))/2,11);
  cputs(msg);
  while (kbhit());
  key_init();

  do{
    while (hi==lo);
    lastkey=buffer[lo++];
    if (lo==100) lo=0;
    /*do not allow F1-F12, Pause, PrintScreen or Scrollock */
    bad=(lastkey>=59 && lastkey<=68) || lastkey==87 || lastkey==88 || lastkey==167
        || lastkey==183 || lastkey==70 || lastkey==197;
  }while ((lastkey&0xff00) || *keynames[lastkey&0xff]=='?' || *keynames[lastkey&0xff]=='#' || bad);
  newval=lastkey&0xff;
  if (newval==1) newval=255;
  sprintf(msg,"Current setting: %s",keynames[newval]);
  gotoxy(1,11);
  clreol();
  gotoxy((78-strlen(msg))/2,11);
  cputs(msg);
  /*wait until key is depressed*/
  do{
    while (hi==lo);
    lastkey=buffer[lo++];
    if (lo==100) lo=0;
  }while(!(lastkey&0xff00));
  key_done();
  return newval;
}
/*------------------------------------------------------------------------*/
void setupkeyset(int no)
{
  int select,key,i;
  int keyset[9];
  char tUL[80],tU[80],tUR[80],tL[80],tR[80],tDL[80],tDR[80],tD[80],tF[80];

  for (i=0;i<9;i++) keyset[i]=keysets[no][i];
  select=0;
  do{
    sprintf(tF,"Fire: %s",keynames[keyset[0]]);
    sprintf(tDL,"Down+left: %s",keynames[keyset[1]]);
    sprintf(tD,"Down: %s",keynames[keyset[2]]);
    sprintf(tDR,"Down+right: %s",keynames[keyset[3]]);
    sprintf(tL,"Left: %s",keynames[keyset[4]]);
    sprintf(tR,"Right: %s",keynames[keyset[5]]);
    sprintf(tUL,"Up+left: %s",keynames[keyset[6]]);
    sprintf(tU,"Up: %s",keynames[keyset[7]]);
    sprintf(tUR,"Up+right: %s",keynames[keyset[8]]);

    key=SelectItem("Change settings:",&select,BACKGROUND,
        tUL,tU,tUR,tL,tR,tDL,tD,tDR,tF,"-","Clear all","-",
        "Accept changes",
        "Discard changes",NULL);
    if (key==13)
      switch(select)
      {
        case 0:keyset[6]=choosekey("up+left",keyset[6]);select++;break;
        case 1:keyset[7]=choosekey("up",keyset[7]);select++;break;
        case 2:keyset[8]=choosekey("up+right",keyset[8]);select++;break;
        case 3:keyset[4]=choosekey("left",keyset[4]);select++;break;
        case 4:keyset[5]=choosekey("right",keyset[5]);select++;break;
        case 5:keyset[1]=choosekey("down+left",keyset[1]);select++;break;
        case 6:keyset[2]=choosekey("down",keyset[2]);select++;break;
        case 7:keyset[3]=choosekey("down+right",keyset[3]);select++;break;
        case 8:keyset[0]=choosekey("fire",keyset[0]);break;
        case 10:for (i=0;i<9;i++) keyset[i]=255;break;
      }
  }while (key!=27 && !(key==13 && select>11));
  if (key==13 && select==12)
    for (i=0;i<9;i++) keysets[no][i]=keyset[i];
}
/*------------------------------------------------------------------------*/

int mainmenu(void)
{
  char joytext[4][80];
  int i,select,key;

  select=0;
  do{
    for (i=0;i<4;i++)
      sprintf(joytext[i],"Joystick %i: %s",i,joysticks[joytypes[i]]);

    key=SelectItem("Select function",&select,BACKGROUND,joytext[0],joytext[1],
               joytext[2],joytext[3],"-",
               "Configure keyset 0","Configure keyset 1",
               "Configure keyset 2","Configure keyset 3","-","Test keyboard collisions",
                "-","Save and exit","Exit without saving",NULL);
    switch(key)
    {
      case 0x14d: /*right*/
        if (select<4)
        {
          joytypes[select]++;
          if (joytypes[select]==JOYSTICKTYPES) joytypes[select]=0;
        }
        break;
      case 0x14b: /*left*/
        if (select<4)
        {
          joytypes[select]--;
          if (joytypes[select]==-1) joytypes[select]=JOYSTICKTYPES-1;
        }
        break;
      case 13: /*enter*/
        if (select<4)
        {
          joytypes[select]++;
          if (joytypes[select]==JOYSTICKTYPES) joytypes[select]=0;
        }else
        if (select<9)
        {
          setupkeyset(select-5);
        }else
        if (select==10)
        {
          testcollisions();
        }
        break;
    }
  }while(key!=27 && !(key==13 && select>=12));
  return (key==13 && select==12); /*Save only when user pressed ENTER on 'Save&Exit' */
}
/*------------------------------------------------------------------------*/
void read_config()
{
  FILE *fr;
  char string[256];
  char *ptr;
  int i,no;
  int bad=0;

  if ((fr=fopen("atari800.cfg","r"))==NULL)
  {
    printf("Error opening configuration file.\n"
           "Execute this utility from atari800 dir after configuring it!\n");
    exit(1);
  }
  while (fgets(string,256,fr))
  {
    i=strlen(string);
    if (string[i-1]=='\n') string[i-1]='\0';
    ptr=strchr(string,'=');
    if (ptr)
    {
      *ptr++='\0';
      if (strncmp(string,"JOYSTICK_",9)==0)
      {
        no=string[9]-'0';
        if (no<0 || no>3) {printf("Error in config lines: %s\n",string);bad=1;}
        else{
          for (i=0;i<JOYSTICKTYPES;i++)
            if (strcmp(ptr,joyparams[i])==0) {
              joytypes[no]=i;
              break;
            }
          if (i==JOYSTICKTYPES) {printf("Unrecognized joystick type %s\n",ptr);bad=1;}
        }
      }else
      if (strncmp(string,"KEYSET_",7)==0)
      {
        no=string[7]-'0';
        if (no<0 || no>4) {printf("Error in config line: %s\n",string);bad=1;}
        else
        {
          i=sscanf(ptr,"%d %d %d %d %d %d %d %d %d",keysets[no]+0,keysets[no]+1,
                 keysets[no]+2,keysets[no]+3,keysets[no]+4,keysets[no]+5,
                 keysets[no]+6,keysets[no]+7,keysets[no]+8);
          if (i!=9) {printf("Not enough parametres for KEYSET_x: %s\n",ptr);bad=1;}
          for (i=0;i<9;i++)
            if (keysets[no][i]<0 || keysets[no][i]>255)
            {
              keysets[no][i]=255;
              printf("Invalid %i. scancode in KEYSET parameter: %s\n",i+1,ptr);
              bad=1;
            }
        }
      }/*other commands are ignored*/
    }
  } /*while*/
  fclose(fr);
  if (bad)
    exit(1);
}
void save_config()
{
  FILE *fr;
  FILE *fw;
  char string[256];
  int i,no;

  if ((fr=fopen("atari800.cfg","r"))==NULL)
  {
    printf("Error opening atari800.cfg!\n");
    return;
  }
  if ((fw=fopen("atari800.tmp","w"))==NULL)
  {
    printf("Error creating temporary file atari800.tmp!\n");
    fclose(fr);
    return;
  }
  while (fgets(string,256,fr))
  {
    if (strncmp(string,"JOYSTICK_",9)!=0 && strncmp(string,"KEYSET_",7)!=0)
      fputs(string,fw);  /*copy all lines except those with JOYSTICK_ and KEYSET_ parameters*/
  }
  fclose(fr);
  i=strlen(string)-1;
  if (i>=0 && string[i]!='\n') fprintf(fw,"\n");
  for (i=0;i<4;i++)
    fprintf(fw,"KEYSET_%i=%i %i %i %i %i %i %i %i %i\n",i,
      keysets[i][0],keysets[i][1],keysets[i][2],keysets[i][3],
      keysets[i][4],keysets[i][5],keysets[i][6],keysets[i][7],
      keysets[i][8]);
  for (i=0;i<4;i++)
    fprintf(fw,"JOYSTICK_%i=%s\n",i,joyparams[joytypes[i]]);
  fclose(fw);
  if (rename("atari800.tmp","atari800.cfg")==0)
    printf("Configuration successfully saved.\n");
  else
    printf("Error when renaming atari800.tmp to atari800.cfg!\n");
}
/*------------------------------------------------------------------------*/
void main(void)
{
  int ok;

  read_config();
  _set_screen_lines(25);
  _setcursortype(_NOCURSOR);

  Screen("Joystick configuration utility for Atari 800 emulator",BACKGROUND+TITLE);
  ok=mainmenu();

  window(1,1,80,25);
  textattr(0xf);
  clrscr();
  _setcursortype(_NORMALCURSOR);

  if (ok) save_config();
}