package be.nikiroo.jvcard;

import java.security.InvalidParameterException;
import java.util.List;

/**
 * A data is a piece of information present in a {@link Contact}. It is
 * basically a key/value pair with optional types and an optional group name.
 * 
 * @author niki
 *
 */
public class Data extends BaseClass<TypeInfo> {
	public enum DataPart {
		FN_FAMILY, FN_GIVEN, FN_ADDITIONAL, // Name
		FN_PRE, FN_POST, // Pre/Post
		BDAY_YYYY, BDAY_MM, BDAY_DD, // BDay
		ADR_PBOX, ADR_EXTENDED, ADR_STREET, ADR_CITY, ADR_REGION, ADR_POSTAL_CODE, ADR_COUNTRY
		// Address
	}

	private String name;
	private String value;
	private String group;
	private int b64; // -1 = no, 0 = still not ordered, the rest is order

	/**
	 * Create a new {@link Data} with the given values.
	 * 
	 * @param types
	 *            the types of this {@link Data}
	 * @param name
	 *            its name
	 * @param value
	 *            its value
	 * @param group
	 *            its group if any
	 */
	public Data(List<TypeInfo> types, String name, String value, String group) {
		super(types);

		this.name = name;
		this.value = value;
		this.group = group;

		b64 = -1;
		for (TypeInfo type : this) {
			if (type.getName().equals("ENCODING")
					&& type.getValue().equals("b")) {
				b64 = 0;
				break;
			}
		}
	}

	/**
	 * Return the name of this {@link Data}
	 * 
	 * @return the name
	 */
	public String getName() {
		return name;
	}

	/**
	 * Return the value of this {@link Data}
	 * 
	 * @return the value
	 */
	public String getValue() {
		return value;
	}

	/**
	 * Change the value of this {@link Data}
	 * 
	 * @param value
	 *            the new value
	 */
	public void setValue(String value) {
		if ((value == null && this.value != null)
				|| (value != null && !value.equals(this.value))) {
			this.value = value;
			setDirty();
		}
	}

	/**
	 * Return the group of this {@link Data}
	 * 
	 * @return the group
	 */
	public String getGroup() {
		return group;
	}

	/**
	 * Change the group of this {@link Data}
	 * 
	 * @param group
	 *            the new group
	 */
	public void setGroup(String group) {
		if ((group == null && this.group != null)
				|| (group != null && !group.equals(this.group))) {
			this.group = group;
			setDirty();
		}
	}

	/**
	 * Return the bkey number of this {@link Data} or -1 if it is not binary.
	 * 
	 * @return the bkey or -1
	 */
	public int getB64Key() {
		return b64;
	}

	/**
	 * Change the bkey of this {@link Data}
	 * 
	 * @param i
	 *            the new bkey
	 * 
	 * @throw InvalidParameterException if the {@link Data} is not binary or if
	 *        it is but you try to set a negative bkey
	 */
	void resetB64Key(int i) {
		if (!isBinary())
			throw new InvalidParameterException(
					"Cannot add a BKey on a non-binary object");
		if (i < 0)
			throw new InvalidParameterException(
					"Cannot remove the BKey on a binary object");

		b64 = i;
	}

	/**
	 * Check if this {@link Data} is binary
	 * 
	 * @return TRUE if it is
	 */
	public boolean isBinary() {
		return b64 >= 0;
	}
}