/*
 * ContactsCache.java
 *
 * Copyright (C) 2011 to 2012 Tim Marston <tim@ed.am>
 *
 * This file is part of the Import Contacts program (hereafter referred
 * to as "this program"). For more information, see
 * http://ed.am/dev/android/import-contacts
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package am.ed.importcontacts;

import java.util.HashMap;
import java.util.HashSet;

public class ContactsCache
{
	/**
	 * Information that can be used to identify a contact within the cache
	 */
	static public class CacheIdentifier
	{
		public enum Type {
			NONE, NAME, ORGANISATION, PRIMARY_NUMBER, PRIMARY_EMAIL }

		private Type _type;
		private String _detail;

		protected CacheIdentifier()
		{
			_type = Type.NONE;
		}

		protected CacheIdentifier( Type type, String detail )
		{
			_type = type;
			_detail = detail;
		}

		public Type getType()
		{
			return _type;
		}

		public String getDetail()
		{
			return _detail;
		}
	}

	// mappings of contact names, organisations and primary numbers to ids
	private HashMap< String, Long > _contactsByName
		= new HashMap< String, Long >();
	private HashMap< String, Long > _contactsByOrg
		= new HashMap< String, Long >();
	private HashMap< String, Long > _contactsByNumber
		= new HashMap< String, Long >();
	private HashMap< String, Long > _contactsByEmail
		= new HashMap< String, Long >();

	// mapping of contact ids to sets of associated data
	private HashMap< Long, HashSet< String > > _contactNumbers
		= new HashMap< Long, HashSet< String > >();
	private HashMap< Long, HashSet< String > > _contactEmails
		= new HashMap< Long, HashSet< String > >();
	private HashMap< Long, HashSet< String > > _contactAddresses
		= new HashMap< Long, HashSet< String > >();
	private HashMap< Long, HashSet< String > > _contactOrganisations
		= new HashMap< Long, HashSet< String > >();

	public static CacheIdentifier createIdentifier(
		Importer.ContactData contact )
	{
		if( contact.hasName() ) {
			String name = normaliseName( contact.getName() );
			if( name != null )
				return new CacheIdentifier(
					CacheIdentifier.Type.NAME, name );
		}

		if( contact.hasPrimaryOrganisation() ) {
			String organisation = normaliseOrganisation(
				contact.getPrimaryOrganisation() );
			if( organisation != null )
				return new CacheIdentifier(
					CacheIdentifier.Type.ORGANISATION, organisation );
		}

		if( contact.hasPrimaryNumber() ) {
			String number = normalisePhoneNumber( contact.getPrimaryNumber() );
			if( number != null )
			return new CacheIdentifier(
				CacheIdentifier.Type.PRIMARY_NUMBER, number );
		}

		if( contact.hasPrimaryEmail() ) {
			String email = normaliseEmailAddress( contact.getPrimaryEmail() );
			if( email != null )
			return new CacheIdentifier(
				CacheIdentifier.Type.PRIMARY_EMAIL, email );
		}

		return null;
	}

	public boolean canLookup( CacheIdentifier identifier )
	{
		return lookup( identifier ) != null;
	}

	public Long lookup( CacheIdentifier identifier )
	{
		switch( identifier.getType() )
		{
		case NAME:
			return _contactsByName.get( identifier.getDetail() );
		case ORGANISATION:
			return _contactsByOrg.get( identifier.getDetail() );
		case PRIMARY_NUMBER:
			return _contactsByNumber.get( identifier.getDetail() );
		case PRIMARY_EMAIL:
			return _contactsByEmail.get( identifier.getDetail() );
		}
		return null;
	}

	public Long removeLookup( CacheIdentifier identifier )
	{
		switch( identifier.getType() )
		{
		case NAME:
			return _contactsByName.remove( identifier.getDetail() );
		case ORGANISATION:
			return _contactsByOrg.remove( identifier.getDetail() );
		case PRIMARY_NUMBER:
			return _contactsByNumber.remove( identifier.getDetail() );
		case PRIMARY_EMAIL:
			return _contactsByEmail.remove( identifier.getDetail() );
		}
		return null;
	}

	public void addLookup( CacheIdentifier identifier, Long id )
	{
		switch( identifier.getType() )
		{
		case NAME:
			_contactsByName.put( identifier.getDetail(), id );
			break;
		case ORGANISATION:
			_contactsByOrg.put( identifier.getDetail(), id );
			break;
		case PRIMARY_NUMBER:
			_contactsByNumber.put( identifier.getDetail(), id );
			break;
		case PRIMARY_EMAIL:
			_contactsByEmail.put( identifier.getDetail(), id );
			break;
		}
	}

	public void removeAssociatedData( Long id )
	{
		_contactNumbers.remove( id );
		_contactEmails.remove( id );
		_contactAddresses.remove( id );
		_contactOrganisations.remove( id );
	}

	public boolean hasAssociatedNumber( Long id, String number )
	{
		number = normalisePhoneNumber( number );
		if( number == null ) return false;

		HashSet< String > set = _contactNumbers.get( id );
		return set != null && set.contains( number );
	}

	public void addAssociatedNumber( Long id, String number )
	{
		number = normalisePhoneNumber( number );
		if( number == null ) return;

		HashSet< String > set = _contactNumbers.get( id );
		if( set == null ) {
			set = new HashSet< String >();
			_contactNumbers.put( id, set );
		}
		set.add( normalisePhoneNumber( number ) );
	}

	public boolean hasAssociatedEmail( Long id, String email )
	{
		email = normaliseEmailAddress( email );
		if( email == null ) return false;

		HashSet< String > set = _contactEmails.get( id );
		return set != null && set.contains( normaliseEmailAddress( email ) );
	}

	public void addAssociatedEmail( Long id, String email )
	{
		email = normaliseEmailAddress( email );
		if( email == null ) return;

		HashSet< String > set = _contactEmails.get( id );
		if( set == null ) {
			set = new HashSet< String >();
			_contactEmails.put( id, set );
		}
		set.add( normaliseEmailAddress( email ) );
	}

	public boolean hasAssociatedAddress( Long id, String address )
	{
		address = normaliseAddress( address );
		if( address == null ) return false;

		HashSet< String > set = _contactAddresses.get( id );
		return set != null && set.contains( normaliseAddress( address ) );
	}

	public void addAssociatedAddress( Long id, String address )
	{
		address = normaliseAddress( address );
		if( address == null ) return;

		HashSet< String > set = _contactAddresses.get( id );
		if( set == null ) {
			set = new HashSet< String >();
			_contactAddresses.put( id, set );
		}
		set.add( normaliseAddress( address ) );
	}

	public boolean hasAssociatedOrganisation( Long id, String organisation )
	{
		organisation = normaliseOrganisation( organisation );
		if( organisation == null ) return false;

		HashSet< String > set = _contactOrganisations.get( id );
		return set != null && set.contains(
			normaliseOrganisation( organisation ) );
	}

	public void addAssociatedOrganisation( Long id, String organisation )
	{
		organisation = normaliseOrganisation( organisation );
		if( organisation == null ) return;

		HashSet< String > set = _contactOrganisations.get( id );
		if( set == null ) {
			set = new HashSet< String >();
			_contactOrganisations.put( id, set );
		}
		set.add( normaliseOrganisation( organisation ) );
	}

	static public String normaliseName( String name )
	{
		if( name == null ) return null;
		name = name.trim();
		return name.length() > 0? name : null;
	}

	static public String normalisePhoneNumber( String number )
	{
		if( number == null ) return null;
		number = number.trim().replaceAll( "[-\\(\\) ]", "" );
		return number.length() > 0? number : null;
	}

	static public String normaliseEmailAddress( String email )
	{
		if( email == null ) return null;
		email = email.trim().toLowerCase();
		return email.length() > 0? email : null;
	}

	static public String normaliseOrganisation( String organisation )
	{
		if( organisation == null ) return null;
		organisation = organisation.trim();
		return organisation.length() > 0? organisation : null;
	}

	static public String normaliseAddress( String address )
	{
		if( address == null ) return null;
		address = address.trim();
		return address.length() > 0? address : null;
	}
}