package dev.peerat.parser.state;

import java.util.ArrayList;
import java.util.List;

import dev.peerat.parser.TokenValidator;

public class InitialStateTree<E> extends StateTree<E>{
	
	private List<StateTree<E>> multiple;
	
	public InitialStateTree(){
		super();
		
		this.multiple = new ArrayList<>();
	}
	
	@Override
	BuilderStateTree<E, ?> internalSeed(TokenValidator validator, E element){
		BuilderStateTree<E, ?> builded;
		for(StateTree<E> state : this.multiple){
			TokenValidator branch;
			if(state.checker == null){
				while((builded = state.internalSeed((branch = validator.branch()), element)) != null){
					validator.merge(branch);
					builded.build(validator, element);
				}
			}else{
				while(state.checker.test((branch = validator.branch()))){
					builded = state.internalSeed(branch, element);
					if(builded == null) break;
					validator.merge(branch);
					builded.build(validator, element);
				}
			}
		}
		return super.internalSeed(validator, element);
	}

	public <T extends StateTree<E>> StateTree<E> multiple(StateTree<E> child){
		this.multiple.add(child);
		return child;
	}
}