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package prerna.reactor.qs.selectors;

import java.util.List;
import java.util.Vector;

import prerna.query.querystruct.AbstractQueryStruct;
import prerna.query.querystruct.selectors.IQuerySelector;
import prerna.query.querystruct.selectors.QueryFunctionHelper;
import prerna.sablecc2.om.GenRowStruct;
import prerna.sablecc2.om.nounmeta.NounMetadata;

public class SubstringReactor extends SelectReactor { 


	@Override
	protected AbstractQueryStruct createQueryStruct() {
		
		List innerSelectors = new Vector();
		GenRowStruct qsInputs = this.getCurRow();
		if(qsInputs == null || qsInputs.isEmpty()) {
			throw new IllegalArgumentException("Must define the filter function for the regex input");
		}
		int size = qsInputs.size();
		if(size < 2) {
			throw new IllegalArgumentException("Must pass in at least 2 parameters, a column and the starting position");
		}
		
		for(int selectIndex = 0;selectIndex < size; selectIndex++) {
			NounMetadata input = qsInputs.getNoun(selectIndex);
			IQuerySelector innerSelector = getSelector(input);
			innerSelectors.add(innerSelector);
		}
		
		qs.addSelector(genFunctionSelector(QueryFunctionHelper.SUBSTRING, innerSelectors));

		
		return qs;
	}


}