package game.command;

import com.google.common.base.Predicate;

public class StringParser extends DefaultingParser {
	private final boolean allowEmpty;
	private final Integer minLength;
	private final Integer maxLength;
	private final Predicate<Character> validator;
	
	public StringParser(String name, String def, boolean allowEmpty, Integer minLength, Integer maxLength, Predicate<Character> validator, 
			Object ... completions) {
		super(name, def, completions);
		this.allowEmpty = allowEmpty;
		this.minLength = minLength;
		this.maxLength = maxLength;
		this.validator = validator;
	}
	
	public String parse(ScriptEnvironment env, String input) {
		if(!this.allowEmpty && input.isEmpty())
			throw new ScriptException("Die Zeichenkette darf nicht leer sein");
		if(this.minLength != null && input.length() < this.minLength)
			if(this.maxLength != null)
				throw new ScriptException("Die Zeichenkette muss zwischen %d .. %d Zeichen lang sein, habe %d ('%s')", 
						this.minLength, this.maxLength, input.length(), input);
			else
				throw new ScriptException("Die Zeichenkette muss mindestens %d Zeichen lang sein, habe %d ('%s')", 
						this.minLength, input.length(), input);
		if(this.maxLength != null && input.length() > this.maxLength)
			if(this.minLength != null)
				throw new ScriptException("Die Zeichenkette muss zwischen %d .. %d Zeichen lang sein, habe %d ('%s')", 
						this.minLength, this.maxLength, input.length(), input);
			else
				throw new ScriptException("Die Zeichenkette darf höchstens %d Zeichen lang sein, habe %d ('%s')", 
						this.maxLength, input.length(), input);
		return input;
	}
}