package dev.peerat.parser;

import java.io.BufferedWriter;
import java.util.LinkedList;
import java.util.List;

public interface ElementBuilder{
	
	void build(Builder builder) throws Exception;

	public static class Builder{
		
		private List<Token> tokens;
		
		public Builder(){
			this.tokens = new LinkedList<>();
			this.tokens.add(new Token(1,1,"", TokenType.GROUP));
		}
		
		public void append(Token token){
			if(token == null) throw new NullPointerException();
			this.tokens.add(token);
		}
		
		public void append(String value){
			Token last = tokens.get(tokens.size()-1);
			append(new Token(last.getLineNumber(), last.getCharacterNumber()+last.getValue().length(), value, TokenType.GROUP));
		}
	
		public void build(BufferedWriter writer) throws Exception{
			int character = 1;
			int line = 1;
			for(Token token : tokens){
				while(line < token.getLineNumber()){
					writer.write("\n");
					line++;
				}
				while(character < token.getCharacterNumber()){
					writer.write(" ");
					character++;
				}
	
				writer.write(token.getValue());
				character+=token.getValue().length();
			}
		}
	}
}