package pt.ist.renderers.extensions.validators;

import pt.ist.renderers.utils.RenderUtils;
import pt.ist.renderers.validators.HtmlChainValidator;
import pt.ist.renderers.validators.HtmlValidator;

public class TextLengthValidator extends HtmlValidator {

    public static enum TextType {
	character, word, paragraph
    }

    /**
     * Serial version id.
     */
    private static final long serialVersionUID = 1L;

    private static final String LENGTH_MESSAGE = "fenix.renderers.length.exceeded";

    private TextType type;
    private Integer length;

    public TextLengthValidator() {
	super();
	setType("character");
    }

    public TextLengthValidator(HtmlChainValidator htmlChainValidator) {
	super(htmlChainValidator);

	setType("character");
    }

    public Integer getLength() {
	return this.length;
    }

    public void setLength(Integer length) {
	this.length = length;
    }

    public String getType() {
	return this.type.name();
    }

    public void setType(String type) {
	try {
	    this.type = TextType.valueOf(type);
	} catch (RuntimeException e) {
	    e.printStackTrace();
	}
    }

    @Override
    public void performValidation() {

	if (isValid() && getLength() != null) {
	    String value = getComponent().getValue();

	    if (value != null) {
		validateLength(value);
	    }
	}
    }

    private void validateLength(String value) {
	if (getLength() == null) {
	    return;
	}

	if (getCount(value) > getLength()) {
	    invalidate();
	}
    }

    private int getCount(String value) {
	switch (this.type) {
	case character:
	    return value.length();
	case word:
	    return value.split("\\p{Space}+").length;
	default:
	    return 0;
	}
    }

    private void invalidate() {
	setValid(false);
	setMessage(LENGTH_MESSAGE + "." + getType());
    }

    @Override
    protected String getResourceMessage(String message) {
	return RenderUtils.getFormatedResourceString(message, getLength());
    }

}