package test;

import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;

import rep.REPCommand;

public class Text extends LinkedList<String> {


	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	
	public Text(String[] _strings){
		super(Arrays.asList(_strings));
	}
	
	public Text(List<String> _strings){
		super(_strings);
	}
	
	public String insert(int i, String str){
		while (i>size()) add("");
		assert 0<=i && i<=size();
		add(i, str);
		return null;
	}
	
	public String delete(int i){
		if (i>=size()) return "";
		// assert 0<=i && i<size();
		return remove(i);
	}
	
	public String replace(int i, String str){
		//assert 0<=i && i<size();
		String replaced ;
		if (i<size()) {
			replaced = get(i);
		} else {
			replaced = "";
		}
		set(i, str);
		return replaced;
	}
	
	public String edit(REPCommand cmd){
		switch(cmd.cmd) {
		case REPCMD_INSERT_USER:
		case REPCMD_INSERT:   return insert(cmd.lineno, cmd.string);
		case REPCMD_DELETE_USER:
		case REPCMD_DELETE:   return delete(cmd.lineno);
		}
		return null;
	}
	
	public void edit(List<REPCommand> cmdlist){
		for (REPCommand cmd: cmdlist){
			edit(cmd);
		}
	}

	public void printAllText(){
		for( String str: this){
			System.out.println(str);
		}
	}
}