#include "linked.hpp"
#include "console.hpp"
#include "jmalloc.hpp"
#include <ctype.h>
#include <stdarg.h>

extern window_manager *eh;

void console::put_string(char const *st)
{
  while (*st)
  {
    put_char(*st);
    st++;
  }
}

void console::redraw()
{
  if (con_win)
  {
    con_win->clear();
    char *s=screen;
    int dx,dy,xa=fnt->width(),ya=fnt->height(),i,j;
    for (j=0,dy=wy();j<h;j++,dy+=ya)
    {
      for (i=0,dx=wx();i<w;i++,s++,dx+=xa)
      {
	if (*s)
	  fnt->put_char(con_win->screen,dx,dy,*s);
      }
    }
    fnt->put_char(con_win->screen,wx()+cx*xa,wy()+cy*ya,'_');
  }
}

void console::show()
{
  if (!con_win)
  {
    con_win=wm->new_window(lastx,lasty,screen_w(),screen_h(),NULL,name);
    redraw();
    con_win->screen->set_clip(con_win->x1(),con_win->y1(),con_win->x2(),con_win->y2());
  }
}

void console::hide()
{
  if (con_win)
  {
    lastx=con_win->x;
    lasty=con_win->y;
    wm->close_window(con_win);
    con_win=NULL;
  }
}

console::~console()
{
  hide();
  jfree(screen);
  jfree(name);
}

console::console(window_manager *WM, JCFont *font, int width, int height, char const *Name)
{
  wm=WM;
  con_win=NULL;
  w=width;
  h=height;
  screen=(char *)jmalloc(w*h,"console screen");
  memset(screen,' ',w*h);
  cx=cy=0;
  fnt=font;
  lastx=xres/2-screen_w()/2;
  lasty=yres/2-screen_h()/2;
  name=(char *)strcpy((char *)jmalloc(strlen(Name)+1,"console name"),Name);
}


void console::draw_cursor()
{
  if (con_win)
    fnt->put_char(con_win->screen,cx*fnt->width()+wx(),cy*fnt->height()+wy(),'_');
}


void console::draw_char(int x, int y, char ch)
{
  if (con_win)
  {
    int fw=fnt->width(),fh=fnt->height();
    int dx=wx()+x*fw,dy=wy()+y*fh;
    con_win->screen->bar(dx,dy,dx+fw-1,dy+fh-1,wm->black());
    fnt->put_char(con_win->screen,dx,dy,ch); 
  }
}

void console::do_cr()
{
  if (cx<w && cy<h)  draw_char(cx,cy,screen[cy*w+cx]);
  cx=0;
  cy++;  
  if (cy>=h)
  {
    cy=h-1;
    if (con_win)
    {
      memmove(screen,screen+w,w*(h-1));
      memset(screen+w*(h-1),' ',w);
      redraw();
      eh->flush_screen();
    }
  } else draw_cursor();    
}

void console::put_char(char ch)
{

  
  switch (ch)
  {
    case JK_BACKSPACE :
    {
      if (cx)
      {
	if (con_win)
	  draw_char(cx,cy,screen[cy*w+cx]);
	cx--;
	if (con_win)
	  draw_cursor();
      }
    } break;
    case '\n' :
    case JK_ENTER :
    {
      do_cr();
    } break;
    default :
    {
      screen[cy*w+cx]=ch;
      if (con_win)
        draw_char(cx,cy,ch);
      cx++;
      if (cx>=w) do_cr(); else 
      if (con_win) draw_cursor();
    }
  }  
}


void console::print_f( const char *format, ...)
{
  char st[300];
  va_list ap;
  va_start(ap, format);
  vsprintf(st,format,ap);
  va_end(ap);
  put_string(st);
}


shell_term::shell_term(window_manager *WM, JCFont *font, int width, int height, char const *Name) :
  console(WM,font,width,height,Name)
{
  shcmd[0]=0;
  prompt();
}

void shell_term::prompt()
{
  put_string("(?=help)>");
}

void shell_term::execute(char const *st)
{
  put_string(st);
  put_string(" : unhandled\n");
}

int shell_term::handle_event(event &ev, window_manager *wm)
{
  if (ev.window==con_win && con_win)
  {
    switch (ev.type)
    {
      case EV_KEY :
      {
	switch (ev.key)
	{
	  case JK_BACKSPACE:
	  {
	    if (shcmd[0]!=0)
	    {
	      shcmd[strlen(shcmd)-1]=0;
	      put_char(ev.key);
	    }
	  } break;
	  case JK_ENTER :
	  {
	    put_char(ev.key);
	    execute(shcmd);
	    prompt();
	    shcmd[0]=0;
	  } break;
	  default :
	  {
	    if (ev.key<256 && isprint(ev.key))
	    {
	      int x=strlen(shcmd);
	      shcmd[x+1]=0;
	      shcmd[x]=ev.key;
	      put_char(ev.key);
	    }
	  } break;
	} break;
      }
    }
    return 1;
  } 
  return 0;
}