<?php
/**
 * Numbers_Words
 *
 * PHP version 4
 *
 * Copyright (c) 1997-2006 The PHP Group
 *
 * This source file is subject to version 3.0 of the PHP license,
 * that is bundled with this package in the file LICENSE, and is
 * available at through the world-wide-web at
 * http://www.php.net/license/3_0.txt.
 * If you did not receive a copy of the PHP license and are unable to
 * obtain it through the world-wide-web, please send a note to
 * license@php.net so we can mail you a copy immediately.
 *
 * @category Numbers
 * @package  Numbers_Words
 * @author   Laurynas Butkus <lauris@night.lt>
 * @license  PHP 3.0 http://www.php.net/license/3_0.txt
 * @version  SVN: $Id: lang.lt.php 302816 2010-08-26 16:02:29Z ifeghali $
 * @link     http://pear.php.net/package/Numbers_Words
 */

/**
 * Class for translating numbers into Lithuanian.
 *
 * @author Laurynas Butkus
 * @package Numbers_Words
 */

/**
 * Include needed files
 */
require_once "Numbers/Words.php";

/**
 * Class for translating numbers into Lithuanian.
 *
 * @category Numbers
 * @package  Numbers_Words
 * @author   Laurynas Butkus <lauris@night.lt>
 * @license  PHP 3.0 http://www.php.net/license/3_0.txt
 * @link     http://pear.php.net/package/Numbers_Words
 */
class Numbers_Words_lt extends Numbers_Words
{

	// {{{ properties

	/**
	 * Locale name
	 * @var string
	 * @access public
	 */
	var $locale = 'lt';

	/**
	 * Language name in English
	 * @var string
	 * @access public
	 */
	var $lang = 'Lithuanian';

	/**
	 * Native language name
	 * @var string
	 * @access public
	 */
	var $lang_native = 'lietuviðkai';

	/**
	 * The word for the minus sign
	 * @var string
	 * @access private
	 */
	var $_minus = 'minus'; // minus sign

	/**
	 * The sufixes for exponents (singular and plural)
	 * @var array
	 * @access private
	 */
	var $_exponent = array(
		0 => array(''),
		3 => array('tûkstantis','tûkstanèiai','tûkstanèiø'),
		6 => array('milijonas','milijonai','milijonø'),
		9 => array('bilijonas','bilijonai','bilijonø'),
	   12 => array('trilijonas','trilijonai','trilijonø'),
	   15 => array('kvadrilijonas','kvadrilijonai','kvadrilijonø'),
	   18 => array('kvintilijonas','kvintilijonai','kvintilijonø')
		);

	/**
	 * The array containing the digits (indexed by the digits themselves).
	 * @var array
	 * @access private
	 */
	var $_digits = array(
		0 => 'nulis', 'vienas', 'du', 'trys', 'keturi',
		'penki', 'ðeði', 'septyni', 'aðtuoni', 'devyni'
	);

	/**
	 * The word separator
	 * @var string
	 * @access private
	 */
	var $_sep = ' ';

	/**
	 * The default currency name
	 * @var string
	 * @access public
	 */
	var $def_currency = 'LTL';

	// }}}
	// {{{ _toWords()

	/**
	 * Converts a number to its word representation
	 * in Lithuanian language
	 *
	 * @param integer $num       An integer between -infinity and infinity inclusive :)
	 *                           that need to be converted to words
	 * @param integer $power     The power of ten for the rest of the number to the right.
	 *                           Optional, defaults to 0.
	 * @param integer $powsuffix The power name to be added to the end of the return string.
	 *                           Used internally. Optional, defaults to ''.
	 *
	 * @return string  The corresponding word representation
	 *
	 * @access protected
	 * @author Laurynas Butkus <lauris@night.lt>
	 * @since  Numbers_Words 0.16.3
	 */
	function _toWords($num, $power = 0, $powsuffix = '')
	{
		$ret = '';

		// add a minus sign
		if (substr($num, 0, 1) == '-') {
			$ret = $this->_sep . $this->_minus;
			$num = substr($num, 1);
		}

		// strip excessive zero signs and spaces
		$num = trim($num);
		$num = preg_replace('/^0+/', '', $num);

		if (strlen($num) > 3) {
			$maxp = strlen($num)-1;
			$curp = $maxp;
			for ($p = $maxp; $p > 0; --$p) { // power
				// check for highest power
				if (isset($this->_exponent[$p])) {
					// send substr from $curp to $p
					$snum = substr($num, $maxp - $curp, $curp - $p + 1);
					$snum = preg_replace('/^0+/', '', $snum);
					if ($snum !== '') {
						$cursuffix = $this->_exponent[$power][count($this->_exponent[$power])-1];
						if ($powsuffix != '') {
							$cursuffix .= $this->_sep . $powsuffix;
						}

						$ret .= $this->_toWords($snum, $p, $cursuffix);
					}
					$curp = $p - 1;
					continue;
				}
			}
			$num = substr($num, $maxp - $curp, $curp - $p + 1);
			if ($num == 0) {
				return $ret;
			}
		} elseif ($num == 0 || $num == '') {
			return $this->_sep . $this->_digits[0];
		}

		$h = $t = $d = 0;

		switch (strlen($num)) {
			case 3:
				$h = (int) substr($num, -3, 1);

			case 2:
				$t = (int) substr($num, -2, 1);

			case 1:
				$d = (int) substr($num, -1, 1);
			break;

			case 0:
			return;
			break;
		}

		if ( $h > 1 ) {
			$ret .= $this->_sep . $this->_digits[$h] . $this->_sep . 'ðimtai';
		} elseif ( $h ) {
			$ret .= $this->_sep . 'ðimtas';
		}

		// ten, twenty etc.
		switch ($t) {
			case 9:
				$ret .= $this->_sep . 'devyniasdeðimt';
			break;

			case 8:
				$ret .= $this->_sep . 'aðtuoniasdeðimt';
			break;

			case 7:
				$ret .= $this->_sep . 'septyniasdeðimt';
			break;

			case 6:
				$ret .= $this->_sep . 'ðeðiasdeðimt';
			break;

			case 5:
				$ret .= $this->_sep . 'penkiasdeðimt';
			break;

			case 4:
				$ret .= $this->_sep . 'keturiasdeðimt';
			break;

			case 3:
				$ret .= $this->_sep . 'trisdeðimt';
			break;

			case 2:
				$ret .= $this->_sep . 'dvideðimt';
			break;

			case 1:
				switch ($d) {
					case 0:
						$ret .= $this->_sep . 'deðimt';
					break;

					case 1:
						$ret .= $this->_sep . 'vienuolika';
					break;

					case 2:
						$ret .= $this->_sep . 'dvylika';
					break;

					case 3:
						$ret .= $this->_sep . 'trylika';
					break;

					case 4:
						$ret .= $this->_sep . 'keturiolika';
					break;

					case 5:
						$ret .= $this->_sep . 'penkiolika';
					break;

					case 6:
						$ret .= $this->_sep . 'ðeðiolika';
					break;

					case 7:
						$ret .= $this->_sep . 'septyniolika';
					break;

					case 8:
						$ret .= $this->_sep . 'aðtuoniolika';
					break;

					case 9:
						$ret .= $this->_sep . 'devyniolika';
					break;
				}
			break;
		}

		// add digits only in <0>,<1,9> and <21,inf>
		if ($t != 1 && $d > 0) {
			if ( $d > 1 || !$power || $t ) {
				$ret .= $this->_sep . $this->_digits[$d];
			}
		}

		if ($power > 0) {
			if (isset($this->_exponent[$power])) {
				$lev = $this->_exponent[$power];
			}

			if (!isset($lev) || !is_array($lev)) {
				return null;
			}

			//echo " $t $d  <br>";

			if ($t == 1 || ($t > 0 && $d == 0 )) {
				$ret .= $this->_sep . $lev[2];
			} elseif ( $d > 1 ) {
				$ret .= $this->_sep . $lev[1];
			} else {
				$ret .= $this->_sep . $lev[0];
			}
		}

		if ($powsuffix != '') {
			$ret .= $this->_sep . $powsuffix;
		}

		return $ret;
	}
	// }}}
}