//     File: Person.java

// Abstract: A representation of an address book entry.

//  Version: 2.1

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package com.example.app.addressbook;

import java.util.*;

/**

 * Data model class for everyone records vended from the Mac OS X address book.

 * 

 * Decodes the data structures returned from JNI, by simply selecting the

 * first string value it finds. More sophisticated models that return lists

 * of email, chat, and phone numbers are an exercise left to the reader.

 * 

 * This model stores its values in a HashMap cache instead of instance variables

 * for sake of clarity and terseness. It is not thread-safe, and is currently only

 * used from the Swing event dispatch thread (EDT).

 */

public class Person {

    static final String

        FIRST = "First", MIDDLE = "Middle", LAST = "Last",

        EMAIL = "Email", PHONE = "Phone", CHAT = "AIMInstant",

        UID = "UID", FULL_NAME = "@FullName@", SEARCH_TEXT = "@SearchText@";

    static final Comparator<Person> SORT_BY_FIRST = new FirstNameSorter();

    static final Comparator<Person> SORT_BY_LAST = new LastNameSorter();

    final Map<String, ?> rawAttributes;

    final Map<String, String> cache = new HashMap<String, String>();

    public Person(final Map<String, ?> rawAttributes) {

        this.rawAttributes = rawAttributes;

    }

    // direct objects from the addressbook

    public String getFirstName()    { return getCached(FIRST); }

    public String getMiddleName()   { return getCached(MIDDLE); }

    public String getLastName()     { return getCached(LAST); }

    public String getEmail()        { return getCached(EMAIL); }

    public String getPhone()        { return getCached(PHONE); }

    public String getChat()         { return getCached(CHAT); }

    public String getUID()          { return getCached(UID); }

    private String getCached(final String key) {

        final String cachedValue = cache.get(key);

        if (cachedValue != null) return cachedValue;

        final String value = getFirstStringOf(rawAttributes.get(key));

        cache.put(key, value);

        return value;

    }

    // digs into collections and pulls out the first String it finds

    private static String getFirstStringOf(final Object object) {

        if (object instanceof String) return (String)object;

        if (object instanceof List<?>) {

            return getFirstStringOf(((List<?>)object).get(0));

        }

        if (object instanceof Map<?,?>) {

            return getFirstStringOf(((Map<?,?>)object).values().iterator().next());

        }

        return "";

    }

    // synthesized property

    public String getFullName() {

        final String name = cache.get(FULL_NAME);

        if (name != null) return name;

        final StringBuilder fullName = new StringBuilder();

        append(fullName, getFirstName(), false);

        append(fullName, getMiddleName(), true);

        append(fullName, getLastName(), true);

        final String newName = fullName.toString();

        cache.put(FULL_NAME, newName);

        return newName;

    }

    // synthesized property, returns lowercase text

    public String getFullSearchText() {

        final String fullSearchText = cache.get(SEARCH_TEXT);

        if (fullSearchText != null) return fullSearchText;

        final StringBuilder fullText = new StringBuilder(getFullName());

        append(fullText, getEmail(), true);

        append(fullText, getChat(), true);

        final String text = fullText.toString().toLowerCase();

        cache.put(SEARCH_TEXT, text);

        return text;

    }

    // string building helper

    private static void append(final StringBuilder builder, final String value, final boolean space) {

        if (value == null || "".equals(value)) return;

        if (space) builder.append(' ');

        builder.append(value);

    }

    static class FirstNameSorter implements Comparator<Person> {

        public int compare(final Person o1, final Person o2) {

            return o1.getFirstName().compareTo(o2.getFirstName());

        }

    }

    static class LastNameSorter implements Comparator<Person> {

        public int compare(final Person o1, final Person o2) {

            return o1.getLastName().compareTo(o2.getLastName());

        }

    }

}