#include <colors.h>
#include <expr.h>
#include <xml.h>

#include "ba8201.h"
#include "ba8301.h"

///////////////////////////////////////////////////////////
// TReport_font
///////////////////////////////////////////////////////////

XVT_FNTID TReport_font::get_xvt_font(const TWindow& win) const
{
  if (win.win() != _win_mapped)
  {
    int nSize = _size;

    if (win.win() != 883) // Non e' una stampa!
    {
      const int cpi = 120 / DEFAULT_FONT_SIZE;
      const PNT pnt0 = win.log2dev(0,0); 
      const PNT pnt1 = win.log2dev(cpi*100,100); 
      const int ppi = pnt1.h - pnt0.h;
      const TString emme(cpi, 'M');

      int mi = 0, me = 0, ma = 2*(pnt1.v - pnt0.v);
      int best = 0, best_error = 0;
      while (mi <= ma)
      {
        me = (mi+ma)/2;

        XVT_FNTID fontid = xvt_font_create();
        xvt_font_set_family(fontid, "Courier New");
        xvt_font_set_size(fontid, me);
        xvt_dwin_set_font(win.win(), fontid);
        const int width = xvt_dwin_get_text_width(win.win(), emme, -1);
        const int error = abs(width - ppi);
        xvt_font_destroy(fontid);
        if (best == 0 || error < best_error)
        {
          best = me;
          best_error = error;
          if (error == 0)
            break;
        }
        if (width > ppi)
          ma = me-1;
        else
          mi = me+1;
      }
      nSize = cpi * best / _cpi;
    }
    
    XVT_FNTID fontid = xvt_font_create();
    xvt_font_set_family(fontid, (char*)(const char*)_name);
    xvt_font_set_size(fontid, nSize);
    xvt_font_set_style(fontid, _style);

    if (_fontid != NULL) 
      xvt_font_destroy(_fontid); 

    TReport_font& my = *(TReport_font*)this;
    my._fontid = fontid;
    my._win_mapped = win.win();
    xvt_dwin_get_font_metrics(_win_mapped, &my._leading, &my._ascent, &my._descent);
  }
  return _fontid;
}

void TReport_font::create(const char* name, int size, XVT_FONT_STYLE_MASK style)
{
  _name = name;
  _size = size;
  _style = style;
  _cpi = 120 / _size;
  if (_fontid != NULL) 
  {
    xvt_font_destroy(_fontid); 
    _fontid = NULL;
    _win_mapped = NULL_WIN;
  }
}

void TReport_font::copy(const TReport_font& font)
{
  create(font.name(), font.size(), font.style());
}

int TReport_font::compare(const TSortable& s) const
{
  const TReport_font& f = (const TReport_font&)s;
  int cmp = _name.compare(f.name(), -1, true);
  if (cmp == 0)
  {
    cmp = _size - f.size();
    if (cmp == 0)
      cmp = _style - f.style();
  }
  return cmp;
}

void TReport_font::save(TXmlItem& item) const
{
  TXmlItem& font = item.AddChild("font");
  font.SetAttr("face", _name);
  font.SetAttr("size", _size);
  if (_style & XVT_FS_BOLD)
    font.SetAttr("bold", "1");
  if (_style & XVT_FS_ITALIC)
    font.SetAttr("italic", "1");
  if (_style & XVT_FS_UNDERLINE)
    font.SetAttr("underline", "1");
}

bool TReport_font::load(const TXmlItem& item)
{
  const TXmlItem* font = item.FindFirst("font");
  if (font != NULL)
  {
    const TString& name = font->GetAttr("face");
    const int size = font->GetIntAttr("size", 10);
    XVT_FONT_STYLE_MASK style = 0;
    if (font->GetIntAttr("bold"))
      style |= XVT_FS_BOLD;
    if (font->GetIntAttr("italic"))
      style |= XVT_FS_ITALIC;
    if (font->GetIntAttr("underline"))
      style |= XVT_FS_UNDERLINE;
    create(name, size, style);
  }
  return font != NULL;
}

TReport_font::TReport_font() : _fontid(NULL), _win_mapped(NULL_WIN)
{ 
  create("Courier New", DEFAULT_FONT_SIZE, XVT_FS_NONE);
}

TReport_font::TReport_font(const TReport_font& f) : _fontid(NULL), _win_mapped(NULL_WIN)
{ copy(f); }

TReport_font::~TReport_font() 
{
  if (_fontid != NULL) 
    xvt_font_destroy(_fontid); 
}

///////////////////////////////////////////////////////////
// TReport_expr
///////////////////////////////////////////////////////////

class TReport_expr : public TExpression
{
  TReport& _report;
  TVariant _var;

protected:
  virtual int parse_user_func(const char* name, int nparms) const;
  virtual void evaluate_user_func(int index, int nparms, TEval_stack& stack, TTypeexp type) const;
  bool is_numeric(const char* str) const;

public:
  TReport_expr(TReport& rep, const char* exp);
  const TVariant& as_variant(TFieldtypes ft);
};

int TReport_expr::parse_user_func(const char* name, int nparms) const
{    
  return -1;
}    

void TReport_expr::evaluate_user_func(int index, int nparms, TEval_stack& stack, TTypeexp type) const
{                 
} 

bool TReport_expr::is_numeric(const char* str) const
{
  if (str == NULL || *str == '\0' || *str == '0')
    return false;    // Se comincia per zero va preservato!
  if (*str == '-')
  {
    str++;
    if (*str <= ' ')
      return false;
  }
  while (*str)
  {
    if (strchr("0123456789.", *str) == NULL)
      return false;
    str++;
  }
  return true;
}

const TVariant& TReport_expr::as_variant(TFieldtypes ft)
{
  set_type(ft == _alfafld || ft == _nullfld ? _strexpr : _numexpr);
  const TString& str = as_string();
  switch (ft)
  {
  case _datefld: _var.set(TDate(str)); break;
  case _longfld: _var.set(atol(str)); break;
  case _realfld: _var.set(real(str)); break;
  default      : _var.set(str); break;
  };
  return _var;
}

TReport_expr::TReport_expr(TReport& rep, const char* exp) 
            : _report(rep) 
{ 
  set(exp, _strexpr);
} 


TObject* TExpression_cache::key2obj(const char* key)
{
  return new TReport_expr(*_report, key);
}

TReport_expr& TExpression_cache::operator[](const char* key)
{ return *(TReport_expr*)objptr(key); }


///////////////////////////////////////////////////////////
// Utility
///////////////////////////////////////////////////////////

void advanced_draw_rect(TWindow& win, const RCT& r, int border, COLOR fore, COLOR back)
{
  const bool has_pen = border > 0;
  const bool has_brush = color_distance(back, COLOR_WHITE) != 0;
  if (has_pen || has_brush)
  {
    if (has_pen)
      win.set_pen(fore, border, PAT_SOLID);
    else
      win.hide_pen();
    if (has_brush)
      win.set_brush(back, PAT_SOLID);
    else
      win.hide_brush();
    xvt_dwin_draw_rect(win.win(), (RCT*)&r);
  }
}

void advanced_draw_text(TWindow& win, const char* text, const RCT& r, 
                        char halign, char valign)
{
  const short dx = r.right-r.left;
  const short dy = r.bottom-r.top;
  short x = r.left;
  short y = r.bottom;
  
  if (halign != 'L')
  {
    const int tw = xvt_dwin_get_text_width(win.win(), text, -1);
    switch (halign)
    {
    case 'C': x += (dx - tw)/2; break;
    case 'R': x = r.right-tw; break;
    default : break;
    }
  }

  // Text Height
  int leading, ascent, descent;
  xvt_dwin_get_font_metrics(win.win(), &leading, &ascent, &descent);
  switch (valign)
  {
  case 'C': y -= (dy - ascent)/2; break;
  case 'T': y = r.top + leading + ascent; break;
  default : y -= descent; break;
  }
  
  xvt_dwin_draw_text(win.win(), x, y, text, -1);
}

///////////////////////////////////////////////////////////
// TReport_section
///////////////////////////////////////////////////////////

TReport_section* TReport_section::father_section() const
{
  if (level() <= 0)
  {
    if (type() != 'B')
      return _report.find_section('B', 0);
  }
  else
    return _report.find_section('B', type() == 'B' ? 0 : 1);
  return NULL;
}

const TReport_font& TReport_section::font() const
{
  const TReport_font* f = _font;
  if (f == NULL)
  {
    TReport_section* father = father_section();
    if (father == NULL)
      f = &_report.font();
    else
      f = &father->font();
  }
  return *f;
}

void TReport_section::set_font(const TReport_font& f)
{
  if (_font != NULL)
  {
    delete _font;
    _font = NULL;
  }
  if (font() != f)
    _font = new TReport_font(f);
}

int TReport_section::add(TObject* obj)
{
  TReport_field* rf = (TReport_field*)obj;
  rf->set_section(this);
  return TArray::add(obj);
}

int TReport_section::add(TObject& obj)
{
  TReport_field& rf = (TReport_field&)obj;
  rf.set_section(this);
  return TArray::add(obj);
}

int TReport_section::find_field_pos(int id)
{
  for (int i = items()-1; i >= 0; i--)
  {
    if (field(i).id() == id)
      break;
  }
  return i;
}

TReport_field* TReport_section::find_field(int id)
{
  const int pos = find_field_pos(id);
  if (pos >= 0)
    return &field(pos);
  return NULL;
}

TPoint TReport_section::compute_size() const
{
  if (hidden())
    return TPoint(0,0);

  TPoint s = _size;
  for (int i = 0; i < items(); i++)
  {
    const TReport_field& rf = field(i);
    if (rf.shown())
    {
      const TRectangle& r = rf.get_rect();
      if (r.right() > s.x)
        s.x = r.right();
      if (r.bottom() > s.y)
        s.y = r.bottom();
    }
  }
  return s;
}

bool TReport_section::compute_rect(TRectangle& rct) const
{
  rct.set(TPoint(0, 0), compute_size());
  return !rct.is_empty();
}

void TReport_section::draw(TWindow& win, TReport_draw_mode rdm) const
{
  if (shown() || rdm == rdm_edit)
  {
    for (int i = 0; i < items(); i++)
    {
      const TReport_field& f = field(i);
      f.draw(win, rdm);
    }
  }
}

bool TReport_section::execute_prescript()
{
  bool ok = true;
  if (active())
  {
    TString80 str;
    ok = _prescript.execute(report(), str);
  }
  for (int i = 0; i < items(); i++)
  {
    TReport_field& f = field(i);
    f.execute_prescript();
  }
  return ok;
}

bool TReport_section::execute_postscript()
{
  bool ok = true;
  for (int i = 0; i < items(); i++)
  {
    TReport_field& f = field(i);
    f.execute_postscript();
  }
  if (active())
  {
    TString80 str;
    ok = _postscript.execute(report(), str);
  }
  return ok;
}

void TReport_section::save(TXmlItem& root) const
{
  TXmlItem& item = root.AddChild("section");
  char* tipo = NULL;
  switch (type())
  {
  case 'H': tipo = "Head"; break;
  case 'F': tipo = "Foot"; break;
  default : tipo = "Body"; break;
  }
  item.SetAttr("type", tipo);
  item.SetAttr("level", level());
  item.SetAttr("hidden", _hidden);
  item.SetAttr("deactivated", _deactivated);
  item.SetAttr("hidden_if_needed", hidden_if_needed());
  item.SetAttr("pagebreak", _page_break);
  if (grouped_by().not_empty())
    item.AddChild("groupby") << grouped_by();
  if (has_font())
    font().save(item);
  _prescript.save(item, "prescript");
  _postscript.save(item, "postscript");

  for (int i = 0; i < items(); i++)
  {
    const TReport_field& rf = field(i);
    rf.save(item);
  }
}

void TReport_section::load(const TXmlItem& sec)
{
  force_page_break(sec.GetBoolAttr("pagebreak"));
  hide_if_needed(sec.GetBoolAttr("hidden_if_needed"));
  show(!sec.GetBoolAttr("hidden"));
  activate(!sec.GetBoolAttr("deactivated"));

  TReport_font font; 
  if (font.load(sec))
    set_font(font);

  if (level() > 1)
  {
    const TXmlItem* gb = sec.FindFirst("groupby");
    if (gb != NULL)
    {
      TString str;
      gb->GetEnclosedText(str);
      group_by(str);
    }
  }

  for (int j = 0; j < sec.GetChildren(); j++)
  {
    const TXmlItem& fld = *sec.GetChild(j);
    if (fld.GetTag() == "field")
    {
      TReport_field* rf = new TReport_field(this);
      if (rf->load(fld))
        add(rf);
      else
        delete rf;
    }
  }

  _prescript.load(sec, "prescript");
  _postscript.load(sec, "postscript");
}

TReport_section::TReport_section(TReport& r, char t, int l) 
               : _report(r), _type(t), _level(l), _font(NULL), 
                 _size(0,0), _page_break(false), _hidden_if_needed(false),
                 _hidden(false), _deactivated(false)
{ }

TReport_section::~TReport_section()
{
  if (_font)
    delete _font;
}

///////////////////////////////////////////////////////////
// TReport_script
///////////////////////////////////////////////////////////

void TReport_script::set(const char* source)
{
  if (_src != source)
  {
    destroy();
    _src = source;
  }
}

bool TReport_script::execute(TReport& rep, TString& output)
{
  bool good = ok();
  if (good)
  {
    if (_bc == NULL)
    {
      _bc = new TBytecode;
      good = rep.compile(_src, *_bc);
    }
    if (good)
      good = rep.execute(*_bc, output);
  }
  return good;
}

bool TReport_script::execute(TReport_field& rf)
{
  bool good = ok();
  if (good)
  {
    TString str(rf.type() == 'S' ? 1024 : 32);
    TReport& rep = rf.section().report();
    rep.set_curr_field(&rf);
    good = execute(rep, str);
    if (good)
      rf.set(str);
  }
  return good;
}

void TReport_script::destroy()
{
  if (_bc != NULL)
  {
    delete _bc;
    _bc = NULL;
  }
  _src.cut(0);
}

void TReport_script::save(TXmlItem& root, const char* tag) const
{
  if (ok())
  {
    TXmlItem& script = root.AddChild(tag);
    script.SetAttr("language", "Alex");
    script << _src;
  }
}

bool TReport_script::load(const TXmlItem& root, const char* tag)
{
  destroy();
  TXmlItem* script = root.FindFirst(tag);
  if (script != NULL)
    script->GetEnclosedText(_src);
  return ok();
}
  
TReport_script::TReport_script() : _bc(NULL)
{ }

TReport_script::~TReport_script()
{ destroy(); }

///////////////////////////////////////////////////////////
// TReport_field
///////////////////////////////////////////////////////////

void TReport_field::set_pos(long x, long y)
{
  _rct.x = x; 
  _rct.y = y;
}

void TReport_field::set_size(long w, long h)
{
  _rct.set_width(w);
  _rct.set_height(h);
}

void TReport_field::offset(const TPoint& pt)
{
  _rct.x += pt.x; 
  _rct.y += pt.y;
}

const TReport_font& TReport_field::font() const
{
  return _font != NULL ? *_font : _section->font();
}

void TReport_field::set_font(const TReport_font& f)
{
  if (_font != NULL)
  {
    delete _font;
    _font = NULL;
  }
  if (f != font())
    _font = new TReport_font(f);
}

void TReport_field::copy(const TReport_field& rf)
{
  _section = rf._section;
  _id = rf.id();
  _type = rf.type();
  _rct = rf._rct;
  _fgcolor = rf._fgcolor; _bgcolor = rf._bgcolor;
  _border = rf._border;
  _halign = rf._halign; _valign = rf._valign;
  _picture = rf._picture; _field = rf._field;
  _hidden = rf.hidden();
  _deactivated = rf.deactivated();
  _selected = false;
  set_font(rf.font());
}

const char* TReport_field::type_name() const
{
  const char* n = NULL;
  switch (_type)
  {
  case 'D': n = "Data"; break;
  case 'E': n = "Ellisse"; break;
  case 'I': n = "Immagine"; break;
  case 'L': n = "Linea"; break;
  case 'N': n = "Numero"; break;
  case 'R': n = "Rettangolo"; break;
  case 'S': n = "Stringa"; break;
  case 'T': n = "Testo"; break;
  default : break;
  }
  return n;
}

TFieldtypes TReport_field::var_type() const
{
  TFieldtypes ft = _nullfld;
  switch (_type)
  {
  case 'D': ft = _datefld; break;
  case 'N': ft = _realfld; break;
  case 'S': ft = _alfafld; break;
  default : ft = _nullfld; break;
  }
  return ft;
}

void TReport_field::set(const char* str)
{
  _var = str;
  _var.convert_to(var_type());
}

void TReport_field::set(const TVariant& var)
{
  _var = var;
  _var.convert_to(var_type());
}

bool TReport_field::execute_prescript()
{
  if (!_field.blank())
  {
    const TFieldtypes ft = var_type();
    if (ft != _nullfld)
      section().report().evaluate(_field, _var, ft);
    else
      _var.set_null();
  }
  bool ok = true;
  if (active())
    ok = _prescript.execute(*this);
  return ok;
}

bool TReport_field::execute_postscript()
{
  return deactivated() || _postscript.execute(*this);
}

void TReport_field::draw_rect(TWindow& win) const
{
  RCT r; win.log2dev(get_rect(), r);
  advanced_draw_rect(win, r, border(), fore_color(), back_color());
}

void TReport_field::draw_text(TWindow& win, const char* text) const
{
  RCT r; win.log2dev(get_rect(), r);
  advanced_draw_rect(win, r, border(), fore_color(), back_color());

  xvt_dwin_set_font(win.win(), font().get_xvt_font(win));
  win.set_color(fore_color(), back_color());
  advanced_draw_text(win, text, r, _halign, _valign); 
}

void TReport_field::draw(TWindow& win, TReport_draw_mode rdm) const
{
  if (rdm != rdm_edit && hidden())
    return;

  PAT_STYLE back_pattern = PAT_HOLLOW;
  if (rdm == rdm_edit)
  {
    if (hidden() || deactivated())
    {
      if (hidden() && deactivated())
        back_pattern = PAT_DIAGCROSS;
      else
        back_pattern = hidden() ? PAT_FDIAG : PAT_BDIAG;
    }
  }

  switch (_type)
  {
  case 'E':
    {
      const bool has_pen = border() > 0;
      const bool has_brush = color_distance(back_color(), COLOR_WHITE) != 0;
      if (has_pen)
        win.set_pen(fore_color(), border(), PAT_SOLID);
      else
        win.hide_pen();
      if (has_brush)
        win.set_brush(back_color(), PAT_SOLID);
      else
        win.hide_brush();
      RCT r; win.log2dev(get_rect(), r);
      xvt_dwin_draw_oval(win.win(), &r);
      
      if (rdm == rdm_edit && back_pattern != PAT_HOLLOW)
      {
        win.set_brush(COLOR_GRAY, back_pattern);
        xvt_dwin_draw_oval(win.win(), &r);
        back_pattern = PAT_HOLLOW;
      }
    }
    break;
  case 'L':
    {
      win.set_pen(fore_color(), border());
      const TRectangle& r = get_rect();
      win.line((short)r.left(), (short)r.top(), (short)r.right(), (short)r.bottom());
      back_pattern = PAT_HOLLOW;
    }
    break;
  case 'I':
  case 'R': draw_rect(win); break;
  case 'T': draw_text(win, _picture); break;
  default : 
    if (rdm == rdm_edit)
    {
      if (border() <= 0) // Rendi piu' visibile il bordo dei campi che non ce l'hanno
      {
        RCT r; win.log2dev(get_rect(), r);
        advanced_draw_rect(win, r, 1, COLOR_LTGRAY, COLOR_WHITE);
      }
      draw_text(win, _field);
    }
    else
      draw_text(win, _var.as_string()); 
    break;
  }

  if (rdm == rdm_edit)
  {
    RCT r; win.log2dev(get_rect(), r);
    if (back_pattern != PAT_HOLLOW)
    {
      win.set_pen(COLOR_LTGRAY);
      win.set_brush(COLOR_LTGRAY, back_pattern);
      xvt_dwin_draw_rect(win.win(), &r);
    }
    if (selected())
    {
      const int k = 4;
      RCT s = r; s.right = s.left+k; s.bottom = s.top+k;
      advanced_draw_rect(win, s, 0, COLOR_WHITE, COLOR_LTGRAY);
      s = r; s.left = s.right-k; s.top = s.bottom-k;
      advanced_draw_rect(win, s, 0, COLOR_WHITE, COLOR_LTGRAY);
    }
  }
}

static void set_num_attr(TXmlItem& item, const char* attr, long num, short def = 0)
{
  if (num != def)
  {
    const real n = num / CENTO;
    item.SetAttr(attr, n.string());
  }
}

static void set_col_attr(TXmlItem& item, const char* attr, COLOR col, COLOR def = COLOR_BLACK)
{
  if (color_distance(col, def) != 0)
  {
    TString16 str; 
    str.format("#%06X", col & 0xFFFFFF);
    item.SetAttr(attr, str);
  }
}

void TReport_field::save(TXmlItem& root) const
{
  TXmlItem& fld = root.AddChild("field");
  fld.SetAttr("type", type_name());

  const TRectangle& rct = get_rect();
  fld.SetAttr("id", _id);
  set_num_attr(fld, "x", rct.left());
  set_num_attr(fld, "y", rct.top());
  set_num_attr(fld, "width", rct.width());
  set_num_attr(fld, "height", rct.height(), 100);
  fld.SetAttr("hidden", _hidden);
  fld.SetAttr("deactivated", _deactivated);
  set_col_attr(fld, "bg_color", back_color(), COLOR_WHITE);
  set_col_attr(fld, "fg_color", fore_color(), COLOR_BLACK);
  if (has_font())
    font().save(fld);

  switch (horizontal_alignment())
  {
  case 'C': fld.SetAttr("align", "center"); break;
  case 'R': fld.SetAttr("align", "right"); break;
  case 'J': fld.SetAttr("align", "justify"); break;
  default : break;
  };
  switch (vertical_alignment())
  {
  case 'T': fld.SetAttr("valign", "top"); break;
  case 'C': fld.SetAttr("valign", "center"); break;
  default : break;
  };
  fld.SetAttr("border", border());
  fld.SetAttr("text", picture());
  if (field().not_empty())
    fld.AddChild("source") << field();
  _prescript.save(fld, "prescript");
  _postscript.save(fld, "postscript");
}

static short get_num_attr(const TXmlItem& item, const char* attr, short def = 0)
{
  const TString& str = item.GetAttr(attr);
  if (str.not_empty())
  {
    real n = str; n *=CENTO ;
    def = (short)n.integer();
  }
  return def;
}

static COLOR get_col_attr(const TXmlItem& item, const char* attr, COLOR col)
{
  const TString& str = item.GetAttr(attr);
  if (str[0] == '#')
    sscanf(str, "#%X", &col);
  return col;
}

static char get_chr_attr(const TXmlItem& item, const char* attr, char c)
{
  const TString& str = item.GetAttr(attr);
  if (str[0] > ' ')
    c = toupper(str[0]);
  return c;
}

bool TReport_field::load(const TXmlItem& fld)
{
  set_type(get_chr_attr(fld, "type", 'T'));
  set_id(fld.GetIntAttr("id"));
  set_column(get_num_attr(fld, "x"));
  set_row(get_num_attr(fld, "y"));
  set_width(get_num_attr(fld, "width"));
  set_height(get_num_attr(fld, "height", 100));
  show(!fld.GetBoolAttr("hidden"));
  activate(!fld.GetBoolAttr("deactivated"));
  set_border(fld.GetIntAttr("border"));
  set_back_color(get_col_attr(fld, "bg_color", COLOR_WHITE));
  set_fore_color(get_col_attr(fld, "fg_color", COLOR_BLACK));
  set_horizontal_alignment(get_chr_attr(fld, "align", 'L'));
  set_vertical_alignment(get_chr_attr(fld, "valign", 'B'));
  set_picture(fld.GetAttr("text"));
  TXmlItem* src = fld.FindFirst("source");
  if (src != NULL)
    src->GetEnclosedText(_field);
  TReport_font font;
  if (font.load(fld))
    set_font(font);
  _prescript.load(fld, "prescript");
  _postscript.load(fld, "postscript");

  return true;
}

TReport_field::TReport_field(TReport_section* sec) 
             : _section(sec), _id(0), _type('T'),
               _font(NULL), _halign('L'), _valign('T'),
               _selected(false), _hidden(false), _deactivated(false),
               _border(0), _fgcolor(COLOR_BLACK), _bgcolor(COLOR_WHITE)
{
  set_pos(0,0);
  set_size(1600,100);
}

TReport_field::TReport_field(const TReport_field& rf) : _font(NULL)
{
  copy(rf);
}

TReport_field::~TReport_field() 
{
  if (_font != NULL)
    delete _font;
}

///////////////////////////////////////////////////////////
// TReport_field_ref
///////////////////////////////////////////////////////////

struct TReport_field_ref : public TObject
{
  char _sectype;
  int _seclevel;
  int _fldid;   // -1 = section; 0 = curent field; >0 = normal field
  int _fldpos;  // array position
};

TObject* TField_cache::key2obj(const char* key)
{
  const TFixed_string code(key);

  TReport_field_ref* rf = new TReport_field_ref;
  rf->_sectype = ' ';
  rf->_seclevel = rf->_fldid = rf->_fldpos = -1;

  const char* strid = "";
  const int dot = code.find('.');
  if (dot == 2)
  {
    rf->_sectype = code[0];
    if (isdigit(code[1]))
      rf->_seclevel = atoi((const char*)code + 1);
    strid = (const char*)code+3;
  } 
  else
    strid = code;
  if (*strid > ' ')
  {
    rf->_fldid = atoi(strid);
    TReport_section& sec = _report->section(rf->_sectype, rf->_seclevel);
    rf->_fldpos = sec.find_field_pos(rf->_fldid);
  }

  return rf;
}

TReport_field* TField_cache::operator[](const char* key)
{
  TReport_field_ref& ref = *(TReport_field_ref*)objptr(key);

  if (ref._fldid <= 0)
    return _report->curr_field();
  
  char typ = ref._sectype;
  int lev = ref._seclevel;
  if (typ <= ' ' || lev < 0)
  {
    TReport_field* cf = _report->curr_field();
    if (typ <= ' ') typ = cf->section().type();
    if (lev < 0) lev = cf->section().level();
  }
  TReport_section& sec = _report->section(typ, lev);
  TReport_field* fld = NULL;
  if (ref._fldpos >= 0 && ref._fldpos < sec.items())
  {
    fld = &sec.field(ref._fldpos);
    if (fld->id() == ref._fldid)
      return fld;
  }
  ref._fldpos = sec.find_field_pos(ref._fldid);
  fld = ref._fldpos >= 0 ? &sec.field(ref._fldpos) : NULL;
 
  return fld;
}

///////////////////////////////////////////////////////////
// TReport
///////////////////////////////////////////////////////////

void TReport::build_section_key(char type, int level, TString& key) const
{ key.format("%c%d", type, level); }

TReport_section* TReport::find_section(char type, int level) const
{
  TString4 key; build_section_key(type, level, key);
  TReport_section* sec = (TReport_section*)_sections.objptr(key);
  return sec;
}

bool TReport::kill_section(char type, int level)
{
  TString4 key; build_section_key(type, level, key);
  return _sections.remove(key);
}

int TReport::find_max_level(char type) const
{
  int lev = 1;

  char type1 = type;
  char type2 = ' ';
  if (type == 'H' || type == 'F')
  { type1 = 'H'; type2 = 'F'; } // Non puo' esistere footer di gruppo senza header

  TAssoc_array& ass = (TAssoc_array&)_sections;
  FOR_EACH_ASSOC_OBJECT(ass, h, k, o) if (k[0] == type1 || k[0] == type2)
  {
    const int l = k[1]-'0';
    if (l > lev)
      lev = l;
  }
  return lev;
}

bool TReport::set_recordset(TRecordset* rs)
{
  if (_recordset != NULL)
  {
    delete _recordset;
    _recordset = NULL;
  }
  _recordset = rs;
  return _recordset != NULL;
}


bool TReport::set_recordset(const TString& sql)
{
  bool ok = false;
  if (sql.compare("SELECT", 6, true) == 0)
    ok = set_recordset(new TSQL_recordset(sql));
  return ok;
}

TReport_section& TReport::section(char type, int level)
{
  TReport_section* sec = find_section(type, level);
  if (sec == NULL)
  {
    sec = new TReport_section(*this, type, level);
    TString4 key; key.format("%c%d", type, level);
    _sections.add(key, sec);
  }
  return *sec;
}

TReport_field* TReport::field(const TString& code)
{
  return _fields[code];
}

bool TReport::evaluate_atom(const char* atom, TVariant& var)
{
  const TFixed_string name(atom); // skip #

  if (name == "PAGE")
  {
    var = curr_page();
    return true;
  }

  const TReport_field* fld = field(name);
  var = fld != NULL ? fld->get() : NULL_VARIANT;
  return fld != NULL;
}

bool TReport::evaluate(const char* expr, TVariant& var, TFieldtypes force_type)
{
  TReport_expr& e = _expressions[expr];
  
  // Caso semplice nonche' standard
  if (e.numvar() == 1)
  {
    const char* name = e.varname(0);
    if (*name == '#' && strcmp(name, expr) == 0)
    {
      const bool ok = evaluate_atom(name+1, var);
      if (force_type != _nullfld)
        var.convert_to(force_type);
      return ok;
    }
  }
  
  for (int i = 0; i < e.numvar(); i++)
  {
    const char* name = e.varname(i);
    if (name[0] == '#')
    {
      evaluate_atom(name, var);
      if (var.type() == _alfafld)
        e.setvar(i, var.as_string());
      else
        e.setvar(i, var.as_real());
    }
    else
    {
      if (_recordset != NULL)
      {
        const TVariant& var = _recordset->get(name);
        if (var.type() == _realfld || var.type() == _longfld)
          e.setvar(i, var.as_real());
        else
          e.setvar(i, var.as_string());
      }
      else
        e.setvar(i, name);
    }
  }

  const TFieldtypes ft = force_type != _nullfld ? force_type : var.type();
  var = e.as_variant(ft);

  return true;
}

void TReport::destroy()
{
  _sections.destroy();
  _description.cut(0);
  if (_recordset != NULL)
  {
    delete _recordset;
    _recordset = NULL;
  }
}

void TReport::load_sections(const TXmlItem& xml)
{
  for (int i = 0; i < xml.GetChildren(); i++)
  {
    const TXmlItem& sec = *xml.GetChild(i);
    if (sec.GetTag() != "section")
      continue;

    const char type = sec.GetAttr("type")[0];
    const int level = sec.GetIntAttr("level");
    TReport_section& rs = section(type, level);
    rs.load(sec);
  }
}

bool TReport::load(const char* fname)
{
  destroy();
  TXmlItem xml;
  
  _path = fname;
  bool ok = xml.Load(_path);
  if (ok)
  {
    _lpi = xml.GetIntAttr("lpi", 6);
    _font.load(xml);

    const TXmlItem* desc = xml.FindFirst("description");
    if (desc != NULL)
      desc->GetEnclosedText(_description);

    if (xml.FindFirst("section") != NULL)
      load_sections(xml);

    const TXmlItem* sql = xml.FindFirst("sql");
    if (sql != NULL)
    {
      TString str;
      sql->GetEnclosedText(str);
      set_recordset(str);
    }
  }
  return ok;
}

bool TReport::save(const char* fname) const
{
  char name[_MAX_FNAME];
  xvt_fsys_parse_pathname (fname, NULL, NULL, name, NULL, NULL);
  bool ok = *name > ' ';
  if (ok)
  {
    TXmlItem xml;
    xml.SetTag("report");
    xml.SetAttr("name", name);
    xml.SetAttr("lpi", lpi());
    xml.AddChild("description") << _description;
    _font.save(xml);

    const char* sectype = "HBF";
    for (int j = 0; j < 3; j++)
    {
      const int ml = find_max_level(sectype[j]);
      for (int i = 0; i <= ml; i++)
      {
        TReport_section& rs = ((TReport*)this)->section(sectype[j], i);
        rs.save(xml);
      }
    }

    if (_recordset != NULL)
      xml.AddChild("sql") << _recordset->query_text();
    xml.Save(fname);
  }
  return ok;
}

bool TReport::get_usr_val(const TString& name, TVariant& var) const
{
  return ((TReport*)this)->evaluate(name, var, _nullfld);
}

bool TReport::set_usr_val(const TString& name, const TVariant& var)
{
  return false;
}


unsigned int TReport::compile_usr_word(const TString& name) const
{
  if (name == "GET_FIELD")
    return 1;
  if (name == "SET_FIELD")
    return 2;
  return 0;
}

bool TReport::execute_usr_word(unsigned int opcode, TVariant_stack& stack)
{
  switch (opcode)
  {
  case  1:
    {
      TVariant& var = stack.peek();
      evaluate(var.as_string(), var, _nullfld);
    }
    break;
  case  2:
    {
      TVariant& var = stack.pop();
      TVariant& val = stack.pop();
      TReport_field* fld = field(var.as_string());
      if (fld != NULL)
        fld->set(val);
    }
    break;
  default: 
    return false;
  }
  return true;
}

TReport::TReport() : _lpi(6), _recordset(NULL), _curr_field(NULL)
{ 
  // Brutte inizializzazioni, ma inevitabili
  _expressions.set_report(this);  
  _fields.set_report(this);  
}

TReport::~TReport()
{ 
  destroy();
}