package pt.utl.ist.fenix.tools.resources;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.apache.commons.lang.StringUtils;

public class LabelFormatter implements Serializable {

    public final static String ENUMERATION_RESOURCES = "enum";

    public final static String APPLICATION_RESOURCES = "application";

    private static class Label implements Serializable {
	private String key;

	private String bundle;

	private String[] args;

	public Label(String bundle, String key, String... args) {
	    super();
	    this.bundle = bundle;
	    this.key = key;
	    this.args = args;
	}

	public String getBundle() {
	    return bundle;
	}

	public void setBundle(String bundle) {
	    this.bundle = bundle;
	}

	public String getKey() {
	    return key;
	}

	public void setKey(String key) {
	    this.key = key;
	}

	public boolean isUseBundle() {
	    return !StringUtils.isEmpty(this.bundle);
	}

	public String[] getArgs() {
	    return this.args;
	}

    }

    private List<Label> labels;

    public LabelFormatter() {
	this.labels = new ArrayList<Label>();
    }

    public LabelFormatter(String text) {
	this();
	appendLabel(text);
    }

    public LabelFormatter(final String key, final String bundle) {
	this();
	appendLabel(key, bundle);
    }

    public LabelFormatter(final String bundle, final String key, final String... args) {
	this();
	appendLabel(bundle, key, args);
    }

    public LabelFormatter appendLabel(String text) {
	this.labels.add(new Label(null, text));

	return this;
    }

    public LabelFormatter appendLabel(String key, String bundle) {
	this.labels.add(new Label(bundle, key));

	return this;
    }

    public LabelFormatter appendLabel(String bundle, String key, String... args) {
	this.labels.add(new Label(bundle, key, args));

	return this;
    }

    @Override
    public String toString() {
	return toString(new DefaultResourceBundleProvider());
    }

    public String toString(IMessageResourceProvider messageResourceProvider) {
	final StringBuilder result = new StringBuilder();

	for (final Label label : getLabels()) {
	    if (label.isUseBundle()) {
		result.append(messageResourceProvider.getMessage(label.getBundle(), label.getKey(), label.getArgs()));
	    } else {
		result.append(label.getKey());
	    }
	}

	return result.toString();

    }

    public List<Label> getLabels() {
	return Collections.unmodifiableList(this.labels);
    }

    public boolean isEmpty() {
	return this.labels.isEmpty();
    }

}