#include <TROOT.h>
#include <TChain.h>
#include <TFile.h>
#include <TSelector.h>
#include <TCanvas.h>
#include <TGraph.h>
#include <TClonesArray.h>
#include <TBenchmark.h>
#include <TMath.h>
#include <TF1.h>
#include <TLatex.h>
#include <TLine.h>
#include <iostream>

void readRawTrace(TString fileName, int minDetID = 0, int maxDetID = 1000){

/**///==============================================================   

   TFile * f1 = new TFile (fileName, "read");
   TTree * tree = (TTree *) f1->Get("tree");
   
   if( tree == NULL ) {
      printf("===== Are you using gen_runXXX.root ? please use runXXX.root\n");
      return;
   }
   
   int totnumEntry = tree->GetEntries();
   printf( "========== total Entry : %d \n", totnumEntry);
   
   TCanvas * cRead = new TCanvas("cRead", "Read Trace", 0, 1500, 800, 300);
   cRead->Divide(1,1);
   for( int i = 1; i <= 2 ; i++){
      cRead->cd(i)->SetGrid();
   }
   cRead->SetGrid();
   
   gStyle->SetOptFit(0);
   
/**///==============================================================   
   UShort_t   detID;
   UShort_t trace[1024];
   UShort_t  traceLength;
   Int_t      QDC[8];
   tree->SetBranchAddress("detID", &detID);
   tree->SetBranchAddress("trace", trace);
   tree->SetBranchAddress("trace_length", &traceLength);
   tree->SetBranchAddress("qdc", QDC); 
   
   TLatex text ;
   text.SetNDC();
   text.SetTextFont(62);
   text.SetTextSize(0.06);
   text.SetTextColor(2);
   
   bool breakFlag = false;  
   bool lastEvFlag = false; 
   int oldEv  = 0;

   TGraph * g = new TGraph();
   
   for( int ev = 0; ev < totnumEntry; ev++){
      
      if( lastEvFlag ) {         
         ev = oldEv;
         lastEvFlag = false;
      }
      tree->GetEntry(ev);
      

      if( !(minDetID <=  detID &&  detID <= maxDetID ) ) continue;

      printf("-------------------------------- ev : %d \n", ev);

      printf("id : %d, trace Length : %u ( enter = next , q = stop, w = last)\n", detID, traceLength);
      
      g->Clear();
      g->Set(traceLength);  
      for( int k = 0; k < traceLength ; k++) g->SetPoint(k, k, trace[k]);
      
      g->SetTitle(Form("ev: %d, id : %d, trace Length : %u\n", ev, detID, traceLength));
      
      cRead->cd(1);
      cRead->Clear();
      g->Draw("AL");
      
      for( int i = 0; i < 8; i++) text.DrawLatex(0.2, 0.8-0.05*i,  Form("%d", QDC[i]));
      
      cRead->Update();         
      gSystem->ProcessEvents();
      
      
      char s[80];
      fgets(s, sizeof s, stdin); 

      if( s[0] == 113 ) { // 'q' = 113
         breakFlag = true;
         break;
      }else if( s[0] == 119 ) { // 'w' = 119
         
         if(  ev > 0  ) {
           lastEvFlag = true;
           oldEv = ev -1;
         }else{
           printf(" the first event!!! \n");
         }
      }
      
      if( breakFlag ) break;
   
   }
   
   //gROOT->ProcessLine(".q");

}