#include <math.h>

#include <defmask.h>
#include <progind.h>  
#include <controls.h>
#include <urldefid.h>

const char* const TITLE_TEXT  = "Attesa";

word TIndwin::measure_text(TToken_string& s, word& maxlen) const
{
  word lines = 0;
  for(const char* t = s.get(0); t; t = s.get())
  {
    const word l = strlen(t);
    if (l > maxlen) maxlen = l;
    lines++;
  }
  return lines;
}

// Certified 70%
TIndwin::TIndwin(long max, const char* txt, bool cancel,  bool bar, int div)
       : _text(NULL), _cancel(NULL), _bar(0),
         _status(0L), _max(max), _flags(0x0)
{
  if (_max <= 0) _max = 1; 

  TToken_string testo(txt, '\n');
  word maxlen = div;
  const word lines = measure_text(testo, maxlen);
  
  int hor = maxlen+3; if (hor > 78) hor = 78;
  int ver = lines+3;
  ver += bar ? 2 : 0;
  ver += cancel ? 2 : 0;

  set_win(create_interface(TASK_WIN, -1, -1, hor, ver, TITLE_TEXT, this, FALSE));

  _text = new TMultiline_control(win(), DLG_NULL, 1, 1, hor-2, lines+1, 512, "CD", "");
  
  testo.replace('\n', '\r');
  _text->set_caption(testo);
  
  if (bar)
  {                    
    RCT r; _text->get_rect(r);
    _bar = r.bottom + CHARY;
  }
  
  if (cancel)
  {
    _cancel = new TPushbutton_control(win(), DLG_CANCEL, -11, -1, 10, 2, "", "Annulla", BMP_CANCEL);
  }                               
  open_modal();
  do_events();
} 

// @doc EXTERNAL

// @mfunc Setta il testo della finestra
void TIndwin::set_text(
  const char* t) // @parm Testo della finestra

  // @comm Si puo' chiamare questa funzione per cambiare il testo, ma
  //       le dimensioni della finestra sono calcolate sul primo testo
  //       passato, quindi occorre dimensionare correttamente il primo passato
  //       (es. inserire degli spazi) se se ne prevede uno piu' lungo.
{
  _text->set_caption(t);
}

TIndwin::~TIndwin()
{     
  if (is_open())
    close_modal(); 
  
  if (_text) delete _text;
  if (_cancel) delete _cancel;
}

bool TIndwin::can_be_closed() const
{
  const bool ok = (_flags & IND_FINISHED) || (_flags & IND_CANCELLED);
  if (!ok) error_box("Attendere la fine dell'operazione prima di chiudere l'applicazione");
  return ok;
}

KEY TIndwin::check_stop()
{
  KEY k = 0;
  if ((_flags & IND_FINISHED) || (_flags & IND_CANCELLED))
  {        
    k = (_flags & IND_FINISHED) ? K_ENTER : K_ESC;
    stop_run(k);
  }  
  return k;
}

void TIndwin::update_bar()
{
  if (_status >= _max)
  {
    _status = _max;
    _flags |= IND_FINISHED;
  }
  
  // Percentuale raggiunta finora
  const double prc = (double)_status/_max;
  
  WINDOW w = win();
  RCT r; xvt_vobj_get_client_rect(w, &r);
  
  // Rettangolo contenente l'intera barra
  r.left = CHARX; r.right -= CHARX;
  r.top = (int)_bar; 
  r.bottom = r.top + 2*CHARY;

  RCT b = r;
  // Rettangolo in rilievo
  b.right = b.left + int((r.right-r.left)*prc);
  xi_draw_3d_rect(w, &b, FALSE, 2, 0, 0, 0);
  // Rettangolo scavato
  b.left = b.right; b.right = r.right;
  xi_draw_3d_rect(w, &b, TRUE, 2, 0, 0, 0);
  
  char n[8]; sprintf(n, "%d%%", (int)floor(prc * 100.0 + 0.5));
  xvt_dwin_draw_text(w, r.left+r.right/2-CHARX, (r.bottom+r.top+CHARY)/2-3, n, -1);
  
  check_stop();
}

void TIndwin::update()
{
  if (_bar) update_bar();
} 

bool TIndwin::on_key(KEY k)
{
  if (k == K_ESC && _cancel) 
  {
    _flags |= IND_CANCELLED;
    check_stop();
  }  
  return TRUE;
}

void TIndwin::on_button(short id)
{
  if (id == DLG_CANCEL)
    on_key(K_ESC);
}


// TProgind --------------------------------------------------------------

TProgind::TProgind(long max, const char* txt, bool cancel, bool bar, int div) 
        : TIndwin(max, txt, cancel, bar, div)
{}

void TProgind::setstatus(long l)
{ 
  const long old_perc = _status * 100L / _max;
  _status  = l > _max ? _max : l; 
  const long new_perc = _status * 100L / _max;
  if (new_perc > old_perc)
  {
    update_bar(); 
    do_events(); 
  }  
}

// TTimerind ------------------------------------------------------------

long TTimerind::_timer_id = 0L;

void TTimerind::handler(WINDOW w, EVENT* e)
{
  switch(e->type)
  {
  case E_CREATE:
  case E_UPDATE:
    if (_status == 0L)
      _timer_id = xvt_timer_create(w, _interval);
    break;
  case E_TIMER:
    if (e->v.timer.id == _timer_id)
    {
      _status += _interval;
      force_update();
      xvt_timer_create(w, _interval);
    }
    break;
  default:
    break;
  }
  TIndwin::handler(w,e);
}

TTimerind::TTimerind(long msec, const char* txt,
                     bool cancel, bool bar, int div, int i) :
                     TIndwin(msec, txt, cancel, bar, div)
{
  _interval = i;
  _timer_id = 0L;
}

TTimerind::~TTimerind()
{ xvt_timer_destroy(_timer_id); }

// C-style binding
// uses static pointer for single instance of TIndwin

static TIndwin* __indwin__p = NULL;

void progind_create(long m, char* t, bool b, bool c, int n)
{ 
  CHECK(__indwin__p == NULL, "Cannot have more than one progress indicator");
  __indwin__p = new TProgind(m,t,b,c,n);
}

void progind_set_status(long l)
{
  ((TProgind*)__indwin__p)->setstatus(l);
}

void progind_cancel()
{
  __indwin__p->cancel();
}

bool  progind_iscancelled()
{
  return __indwin__p->iscancelled();
}

bool  progind_isfinished()
{
  return __indwin__p->isfinished();
}

void progind_destroy()
{
  delete __indwin__p;
  __indwin__p = NULL;
}

void timerind_create(long l, char* title, bool bar, bool cancel,
                     int divisions, int interval)
{
  CHECK(__indwin__p == NULL, "Cannot have more than one progress indicator");
  __indwin__p = new TTimerind(l,title,bar,cancel,divisions,interval);
}

void timerind_cancel()
{
  __indwin__p->cancel();
}

bool  timerind_iscancelled()
{
  return __indwin__p->iscancelled();
}

bool  timerind_isfinished()
{
  return __indwin__p->isfinished();
}

void timerind_destroy()
{
  delete __indwin__p;
  __indwin__p = NULL;
}