// @(#)root/fitpanel:$Id$
// Author: Ilka Antcheva, Lorenzo Moneta, David Gonzalez Maline 10/08/2006

/*************************************************************************
 * Copyright (C) 1995-2006, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/

#ifndef ROOT_TFitEditor
#define ROOT_TFitEditor


#include "TGFrame.h"
#include "TGButton.h"

#include "Foption.h"
#include "Math/MinimizerOptions.h"
#include "Fit/DataRange.h"

#include <vector>
#include <map>

//--- Object types
enum EObjectType {
   kObjectHisto,
   kObjectGraph,
   kObjectGraph2D,
   kObjectHStack,
   kObjectTree,
   kObjectMultiGraph
};


class TGTab;
class TVirtualPad;
class TCanvas;
class TGLabel;
class TGComboBox;
class TGTextEntry;
class TGNumberEntry;
class TGDoubleHSlider;
class TGNumberEntry;
class TGNumberEntryField;
class TGStatusBar;
class TAxis;
class TF1;
class TF1NormSum;
class TF1Convolution;


class TFitEditor : public TGMainFrame {

protected:
   TGTab               *fTab;              ///< tab widget holding the editor
   TGCompositeFrame    *fTabContainer;     ///< main tab container
   TGCompositeFrame    *fGeneral;          ///< general tab
   TGCompositeFrame    *fMinimization;     ///< minimization tab
   TGTextButton        *fUpdateButton;     ///< updates data from gROOT and gDirectory
   TGTextButton        *fFitButton;        ///< performs fitting
   TGTextButton        *fResetButton;      ///< resets fit parameters
   TGTextButton        *fCloseButton;      ///< close the fit panel
   TGLabel             *fSelLabel;         ///< contains selected fit function
   TGComboBox          *fDataSet;          ///< contains list of data set to be fitted
   TGComboBox          *fTypeFit;          ///< contains the types of functions to be selected
   TGComboBox          *fFuncList;         ///< contains function list
   TGTextEntry         *fEnteredFunc;      ///< contains user function file name
   TGTextButton        *fUserButton;       ///< opens a dialog for user-defined fit method
   TGRadioButton       *fNone;             ///< set no operation mode
   TGRadioButton       *fAdd;              ///< set addition mode
   TGRadioButton       *fNormAdd;          ///< set normalized addition mode
   TGRadioButton       *fConv;             ///< set convolution mode
   TGLayoutHints       *fLayoutNone;       ///< layout hints of fNone radio button
   TGLayoutHints       *fLayoutAdd;        ///< layout hints of fAdd radio button
   TGLayoutHints       *fLayoutNormAdd;    ///< layout hints of fNOrmAdd radio button
   TGLayoutHints       *fLayoutConv;       ///< layout hints of fConv radio button
   TGTextButton        *fSetParam;         ///< open set parameters dialog
   TGCheckButton       *fIntegral;         ///< switch on/off option 'integral'
   TGCheckButton       *fBestErrors;       ///< switch on/off option 'improve errors'
   TGCheckButton       *fUseRange;         ///< switch on/off option 'use function range'
   TGCheckButton       *fAdd2FuncList;     ///< switch on/off option 'add to list'
   TGCheckButton       *fUseGradient ;     ///< switch on/off option 'use gradient'
   TGCheckButton       *fAllWeights1;      ///< switch on/off option 'all weights=1'
   TGCheckButton       *fImproveResults;   ///< switch on/off option 'improve fit results'
   TGCheckButton       *fEmptyBinsWghts1;  ///< switch on/off option 'include empry bins'
   TGComboBox          *fMethodList;       ///< contains method list
   TGCheckButton       *fLinearFit;        ///< switch on/off linear fit option
   TGCheckButton       *fNoChi2;           ///< switch on/off option 'No Chi-square'
   TGCheckButton       *fNoStoreDrawing;   ///< switch on/off 'no store/drwing' option
   TGCheckButton       *fNoDrawing;        ///< switch on/off 'no drawing' option
   TGCheckButton       *fDrawSame;         ///< switch on/off fit function drawing
   TGTextButton        *fDrawAdvanced;     ///< opens a dialog for advanced draw options
   TGDoubleHSlider     *fSliderX;          ///< slider to set fit range along x-axis
   TGNumberEntry       *fSliderXMax;       ///< entry to set the maximum in the range
   TGNumberEntry       *fSliderXMin;       ///< entry to set the minumum in the range
   TGDoubleHSlider     *fSliderY;          ///< slider to set fit range along y-axis
   TGNumberEntry       *fSliderYMax;       ///< entry to set the maximum in the range
   TGNumberEntry       *fSliderYMin;       ///< entry to set the minumum in the range
   TGDoubleHSlider     *fSliderZ;          ///< slider to set fit range along z-axis
   TGHorizontalFrame   *fSliderXParent;    ///< parent of fSliderX
   TGHorizontalFrame   *fSliderYParent;    ///< parent of fSliderY
   TGHorizontalFrame   *fSliderZParent;    ///< parent of fSliderZ
   TGCheckButton       *fEnableRobust;     ///< switch on/off robust option
   TGNumberEntry       *fRobustValue;      ///< contains robust value for linear fit
   TGRadioButton       *fOptDefault;       ///< set default printing mode
   TGRadioButton       *fOptVerbose;       ///< set printing mode to 'Verbose'
   TGRadioButton       *fOptQuiet;         ///< set printing mode to 'Quiet'
   TVirtualPad         *fParentPad;        ///< pad containing the object
   TObject             *fFitObject;        ///< selected object to fit
   EObjectType          fType;             ///< object type info
   Int_t                fDim;              ///< object dimension
   TAxis               *fXaxis;            ///< x-axis
   TAxis               *fYaxis;            ///< y-axis
   TAxis               *fZaxis;            ///< z-axis
   TF1NormSum          *fSumFunc;          ///<! TF1NormSum object
   TF1Convolution      *fConvFunc;         ///<! TF1Convolution object

   // structure holding parameter value and limits
   struct FuncParamData_t {
      FuncParamData_t() {
         fP[0] = 0; fP[1] = 0; fP[2] = 0;
      }
      Double_t & operator[](UInt_t i) { return fP[i];}
      Double_t fP[3];
   };
   std::vector<FuncParamData_t> fFuncPars; // function parameters (value + limits)

   std::multimap<TObject*, TF1*> fPrevFit; // Previous successful fits.
   std::vector<TF1*> fSystemFuncs;         // functions managed by the fitpanel

   TGRadioButton       *fLibMinuit;        // set default minimization library (Minuit)
   TGRadioButton       *fLibMinuit2;       // set Minuit2 as minimization library
   TGRadioButton       *fLibFumili;        // set Fumili as minimization library
   TGRadioButton       *fLibGSL;           // set GSL as minimization library
   TGRadioButton       *fLibGenetics;      // set Genetic/GALib as minimization library
   TGComboBox          *fMinMethodList;    // set the minimization method
   TGNumberEntryField  *fErrorScale;       // contains error scale set for minimization
   TGNumberEntryField  *fTolerance;        // contains tolerance set for minimization
   TGNumberEntryField  *fIterations;       // contains maximum number of iterations

   TGStatusBar         *fStatusBar;        // statusbar widget

   Bool_t               fChangedParams;    // flag to indicate if the parameters have been set in the ParameterDialog GUI

   static TFitEditor *fgFitDialog;         // singleton fit panel

protected:
   void        GetFunctionsFromSystem();
   void        ProcessTreeInput(TObject* objSelected, Int_t selected,
                                TString variables, TString cuts);
   TF1*        FindFunction();
   void        FillDataSetList();
   TGComboBox* BuildMethodList(TGFrame *parent, Int_t id);
   void        GetRanges(ROOT::Fit::DataRange&);
   TF1*        GetFitFunction();
   TList*      GetFitObjectListOfFunctions();
   void        DrawSelection(bool restore = false);
   Int_t       CheckFunctionString(const char* str);
   void        CreateFunctionGroup();
   void        CreateGeneralTab();
   void        CreateMinimizationTab();
   void        MakeTitle(TGCompositeFrame *parent, const char *title);
   TF1*        HasFitFunction();
   void        SetEditable(Bool_t) override;

private:
   TFitEditor(const TFitEditor&);              // not implemented
   TFitEditor& operator=(const TFitEditor&);   // not implemented

   void RetrieveOptions(Foption_t&, TString&, ROOT::Math::MinimizerOptions&, Int_t);

public:
   TFitEditor(TVirtualPad* pad, TObject *obj);
   ~TFitEditor() override;

   TList*  GetListOfFittingFunctions(TObject *obj = nullptr);

   static  TFitEditor *GetInstance(TVirtualPad* pad = nullptr, TObject *obj = nullptr);
   Option_t  *GetDrawOption() const override;
   virtual void       Hide();
   virtual void       Show(TVirtualPad* pad, TObject *obj);

           void       ShowObjectName(TObject* obj);
           Bool_t     SetObjectType(TObject* obj);
   virtual void       Terminate();
           void       UpdateGUI();

   void   CloseWindow() override;
   virtual void   ConnectSlots();
   virtual void   DisconnectSlots();
   void   RecursiveRemove(TObject* obj) override;

protected:
   virtual void   SetCanvas(TCanvas *c);

public:
   virtual void   SetFitObject(TVirtualPad *pad, TObject *obj, Int_t event);
   virtual void   SetFunction(const char *function);

   // slot methods 'General' tab
   void           FillFunctionList(Int_t selected = -1);
   void           FillMinMethodList(Int_t selected = -1);
   virtual void   DoAddition(Bool_t on);
   virtual void   DoNormAddition(Bool_t on);
   virtual void   DoConvolution(Bool_t on);
   virtual void   DoAdvancedOptions();
   virtual void   DoAllWeights1();
   virtual void   DoClose();
   virtual void   DoEmptyBinsAllWeights1();
   virtual void   DoEnteredFunction();
   virtual void   DoUpdate();
   virtual void   DoFit();
   virtual void   DoMaxIterations();
   virtual void   DoDataSet(Int_t sel);
   virtual void   DoFunction(Int_t sel);
   virtual void   DoLinearFit();
   virtual void   DoNoChi2();
   virtual void   DoNoSelection();
   virtual void   DoNoStoreDrawing();
   virtual void   DoReset();
   virtual void   DoRobustFit();
   virtual void   DoSetParameters();
   virtual void   DoSliderXMoved();
   virtual void   DoNumericSliderXChanged();
   virtual void   DoSliderYMoved();
   virtual void   DoNumericSliderYChanged();
   virtual void   DoSliderZMoved();
   virtual void   DoUserDialog();
   virtual void   DoUseFuncRange();

   // slot methods 'Minimization' tab
   virtual void   DoLibrary(Bool_t on);
   virtual void   DoMinMethod(Int_t );
   virtual void   DoPrintOpt(Bool_t on);

public:
   typedef std::vector<FuncParamData_t > FuncParams_t;

   friend class FitEditorUnitTesting;
   ClassDefOverride(TFitEditor,0)  //Fit Panel interface
};

#endif