#include "debug.h"
#include "init.h"
#include "globals.h"

static void usage(const char* prg)
{
 std::cout<<"Usage: "<<prg<<" [-h] [-t num] [-d] [-g] [-i] [-q] file"<<std::endl<<
  "-h - this help,"<<std::endl<<
  "-t - set number of threads,"<<std::endl<<
  "-d - only parse config, print it and return (with -q, nothing printing),"<<std::endl<<
  "-g - enable debug messages,"<<std::endl<<
  "-i - print information about current actions,"<<std::endl<<
  "-q - be quitet, ignore print directives."<<std::endl<<
  "-g, -i and -q are mutually exclusive."<<std::endl;
}

int main(int argc, char** argv)
{
 int ret;
 DepTree* DPTree;
 struct program_options options;

 // Set default options
 options.threads=1;
 options.help=options.dump=false;
 options.dl=NORMAL;
 options.config=0;

 // Parse options
 ret=ParseOptions(argc,argv,options);
 if(ret!=0 || options.config==0) {usage(argv[0]); return 1;}
 if(options.help) {usage(argv[0]); return 0;}

 SetDebugLevel(options.dl);

 COUT(INFO)<<"Parse config file "<<options.config<<" ";
 ret=ParseConfigFile(options.config); if(ret!=0) { ClearGlobals(); return 1;}
 COUT(INFO)<<"Ok"<<std::endl;
 if(G_tosave.size()==0 && G_toprint.size()==0)
 {
  COUT(WARNING)<<"No actions needed, exiting"<<std::endl;
  ClearGlobals();
  return 0;
 }

 {
  UsedType used, all;
  for(auto& i:G_vars) all.insert(i.first);
  unsigned int tot=G_vars.size();

  DPTree=new DepTree;
  COUT(INFO)<<"Building dependency tree ";
  ret=BuildDepTree(DPTree,used); if(ret!=0) { ClearGlobals(); delete DPTree; return 1;}
  COUT(INFO)<<"Ok"<<std::endl;

  COUT(INFO)<<"Remove unneeded definitions: ";
  for(auto& i:all) if(used.count(i)==0) { delete G_vars[i]; G_vars.erase(i);};
  COUT(INFO)<<(tot-G_vars.size())<<" removed, "<<G_vars.size()<<" remains."<<std::endl;
 }

 RegisterArifmeticFunctions();

 COUT(INFO)<<"Checking functions ";
 ret=CheckFunctions(); if(ret!=0) { ClearGlobals(); delete DPTree; return 1;}
 COUT(INFO)<<"Ok"<<std::endl;

 if(options.dump) DumpConfig();
 else
 {
  COUT(INFO)<<"Evaluate tree ";
  ret=DPTree->EvaluateTree(options.threads); if(ret!=0) { ClearGlobals(); delete DPTree; return 1;}
  COUT(INFO)<<"Ok"<<std::endl;
 }

 ClearGlobals();
 delete DPTree;
 return 0;
}