package pt.ist.renderers.extensions.validators;

import org.apache.commons.lang.StringUtils;

import pt.ist.renderers.components.HtmlFormComponent;
import pt.ist.renderers.components.HtmlSimpleValueComponent;
import pt.ist.renderers.extensions.AutoCompleteInputRenderer;
import pt.ist.renderers.utils.RenderUtils;
import pt.ist.renderers.validators.HtmlChainValidator;
import pt.ist.renderers.validators.HtmlValidator;

public class RequiredAutoCompleteSelectionValidator extends HtmlValidator {

    private boolean allowsCustom = false;

    public RequiredAutoCompleteSelectionValidator() {
	super();
    }

    public RequiredAutoCompleteSelectionValidator(HtmlChainValidator htmlChainValidator) {
	super(htmlChainValidator);
    }

    @Override
    public void performValidation() {
	HtmlSimpleValueComponent component = (HtmlSimpleValueComponent) getComponent();

	String value = component.getValue();
	if (value == null || value.length() == 0
		|| (!this.isAllowsCustom() && value.equals(AutoCompleteInputRenderer.TYPING_VALUE))) {
	    setValid(false);
	} else {
	    setValid(true);
	}
    }

    @Override
    public boolean hasJavascriptSupport() {
	return true;
    }

    @Override
    protected String getSpecificValidatorScript() {

	StringBuilder validatorBuilder = new StringBuilder(
		"function(element) { return $(element).prevAll(\"input[name$=_AutoComplete]\").attr('value').length > 0 ");
	if (this.isAllowsCustom()) {
	    validatorBuilder.append("|| ($(element).prevAll(\"input[name$=_AutoComplete]\").attr('value') == 'custom')");
	} else {
	    validatorBuilder.append("&& ($(element).prevAll(\"input[name$=_AutoComplete]\").attr('value') != 'custom')");
	}
	validatorBuilder.append("; }");

	return validatorBuilder.toString();
    }

    @Override
    protected String bindJavascriptEventsTo(HtmlFormComponent formComponent) {
	return "#" + RenderUtils.escapeId(formComponent.getId().replace("_AutoComplete", ""));
    }

    @Override
    protected String getValidatableId(HtmlFormComponent formComponent) {
	return RenderUtils.escapeId(formComponent.getId().replace("_AutoComplete", ""));
    }

    @Override
    public String getMessage() {
	if (StringUtils.isEmpty(super.getMessage())) {
	    setMessage("renderers.validator.autoComplete.required");
	}
	return super.getMessage();
    }

    public boolean isAllowsCustom() {
	return allowsCustom;
    }

    public void setAllowsCustom(boolean allowsCustom) {
	this.allowsCustom = allowsCustom;
    }

}