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#ifndef AGRAMMAR_H_
#define AGRAMMAR_H_
#include "grammar.h"
using namespace std;
class aTGImpl;
struct NTRule{
NTRule(){};
NTRule(const TRulePtr & rule, WordID nt){
nt_ = nt;
rule_ = rule;
if (rule->lhs_ * -1 == nt)
ntPos_.push_back(-1);
for (int i=0; i< rule->f().size(); i++)
if (rule->f().at(i) * -1 == nt)
ntPos_.push_back(i);
}
TRulePtr rule_;
WordID nt_; //the labelID of the nt (WordID>0);
vector<int> ntPos_; //position of nt_ -1: lhs, from 0...f_.size() for nt of f_()
//i.e the rules is: NP-> DET NP; if nt_=5 is the labelID of NP then ntPos_ = (-1, 1): the indexes of nonterminal NP
};
struct aTextGrammar : public Grammar {
aTextGrammar();
aTextGrammar(const std::string& file);
void SetMaxSpan(int m) { max_span_ = m; }
virtual const GrammarIter* GetRoot() const;
void AddRule(const TRulePtr& rule);
void ReadFromFile(const std::string& filename);
virtual bool HasRuleForSpan(int i, int j, int distance) const;
const std::vector<TRulePtr>& GetUnaryRules(const WordID& cat) const;
void AddSplitNonTerminal(WordID nt_old, vector<WordID> & nts);
void setMaxSplit(int max_split);
void splitNonterminal(WordID wordID);
void PrintAllRules() const;
void PrintNonterminalRules(WordID nt) const;
void SetGoalNT(const string & goal_str);
private:
void RemoveRule(const TRulePtr & rule);
void RemoveNonterminal(WordID wordID);
int max_span_;
int max_split_;
boost::shared_ptr<aTGImpl> pimpl_;
map <WordID, vector<TRulePtr> > lhs_rules_;// WordID >0
map <WordID, vector<NTRule> > nt_rules_;
// map<WordID, vector<WordID> > grSplitNonterminals;
WordID goalID;
};
#endif
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