<?php

/**
 * NumberFormatInfo class file.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the BSD License.
 *
 * Copyright(c) 2004 by Qiang Xue. All rights reserved.
 *
 * To contact the author write to {@link mailto:qiang.xue@gmail.com Qiang Xue}
 * The latest version of PRADO can be obtained from:
 * {@link http://prado.sourceforge.net/}
 *
 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
 * @package Prado\I18N\core
 */

namespace Prado\I18N\core;

/**
 * Get the CultureInfo class file.
 */
require_once(dirname(__FILE__).'/CultureInfo.php');

/**
 * NumberFormatInfo class
 *
 * Defines how numeric values are formatted and displayed,
 * depending on the culture. Numeric values are formatted using
 * standard or custom patterns stored in the properties of a
 * NumberFormatInfo.
 *
 * This class contains information, such as currency, decimal
 * separators, and other numeric symbols.
 *
 * To create a NumberFormatInfo for a specific culture,
 * create a CultureInfo for that culture and retrieve the
 * CultureInfo->NumberFormat property. Or use
 * NumberFormatInfo::getInstance($culture).
 * To create a NumberFormatInfo for the invariant culture, use the
 * InvariantInfo::getInvariantInfo().
 *
 *
 * @author Xiang Wei Zhuo <weizhuo[at]gmail[dot]com>
 * @package Prado\I18N\core
 */
class NumberFormatInfo
{

	/**
	 * ICU number formatting data.
	 * @var array
	 */
	private $data = array();

	/**
	 * A list of properties that are accessable/writable.
	 * @var array
	 */
	protected $properties = array();

	/**
	 * The number pattern.
	 * @var array
	 */
	protected $pattern = array();

	const DECIMAL = 0;
	const CURRENCY = 1;
	const PERCENTAGE = 2;
	const SCIENTIFIC = 3;

	/**
	 * Allow functions that begins with 'set' to be called directly
	 * as an attribute/property to retrieve the value.
	 * @return mixed
	 */
	public function __get($name)
	{
		$getProperty = 'get'.$name;
		if(in_array($getProperty, $this->properties))
			return $this->$getProperty();
		else
			throw new Exception('Property '.$name.' does not exists.');
	}

	/**
	 * Allow functions that begins with 'set' to be called directly
	 * as an attribute/property to set the value.
	 */
	public function __set($name, $value)
	{
		$setProperty = 'set'.$name;
		if(in_array($setProperty, $this->properties))
			$this->$setProperty($value);
		else
			throw new Exception('Property '.$name.' can not be set.');
	}

	/**
	 * Initializes a new writable instance of the NumberFormatInfo class
	 * that is dependent on the ICU data for number, decimal, and currency
	 * formatting information. <b>N.B.</b>You should not initialize this
	 * class directly unless you know what you are doing. Please use use
	 * NumberFormatInfo::getInstance() to create an instance.
	 * @param array ICU data for date time formatting.
	 * @see getInstance()
	 */
	public function __construct($data=array(), $type=NumberFormatInfo::DECIMAL)
	{
		$this->properties = get_class_methods($this);

		if(empty($data))
			throw new Exception('Please provide the ICU data to initialize.');

		$this->data = $data;

		$this->setPattern($type);
	}

	/**
	 * Set the pattern for a specific number pattern. The validate patterns
	 * NumberFormatInfo::DECIMAL, NumberFormatInfo::CURRENCY,
     * NumberFormatInfo::PERCENTAGE, or NumberFormatInfo::SCIENTIFIC
	 * @param int pattern type.
	 */
	public function setPattern($type=NumberFormatInfo::DECIMAL)
	{
		if(is_int($type))
			$this->pattern =
				$this->parsePattern($this->data['NumberPatterns'][$type]);
		else
			$this->pattern = $this->parsePattern($type);

		$this->pattern['negInfty'] =
			$this->data['NumberElements'][6].
			$this->data['NumberElements'][9];

		$this->pattern['posInfty'] =
			$this->data['NumberElements'][11].
			$this->data['NumberElements'][9];
	}

	public function getPattern()
	{
		return $this->pattern;
	}

	/**
	 * Gets the default NumberFormatInfo that is culture-independent
	 * (invariant).
	 * @return NumberFormatInfo default NumberFormatInfo.
	 */
    public static function getInvariantInfo($type=NumberFormatInfo::DECIMAL)
    {
        static $invariant;
		if($invariant === null)
        {
            $culture = CultureInfo::getInvariantCulture();
            $invariant = $culture->NumberFormat;
            $invariant->setPattern($type);
        }
		return $invariant;
    }

    /**
     * Returns the NumberFormatInfo associated with the specified culture.
     * @param CultureInfo the culture that gets the NumberFormat property.
     * @param int the number formatting type, it should be
     * NumberFormatInfo::DECIMAL, NumberFormatInfo::CURRENCY,
     * NumberFormatInfo::PERCENTAGE, or NumberFormatInfo::SCIENTIFIC
     * @return NumberFormatInfo NumberFormatInfo for the specified
     * culture.
     * @see getCurrencyInstance();
     * @see getPercentageInstance();
     * @see getScientificInstance();
     */
    public static function getInstance($culture=null,
    								   $type=NumberFormatInfo::DECIMAL)
    {
   		if ($culture instanceof CultureInfo)
   		{
            $formatInfo = $culture->NumberFormat;
            $formatInfo->setPattern($type);
            return $formatInfo;
   		}
       	else if(is_string($culture))
       	{
       		$cultureInfo = new CultureInfo($culture);
       		$formatInfo = $cultureInfo->NumberFormat;
       		$formatInfo->setPattern($type);
       		return $formatInfo;
       	}
       	else
       	{
            $cultureInfo = new CultureInfo();
       		$formatInfo = $cultureInfo->NumberFormat;
       		$formatInfo->setPattern($type);
       		return $formatInfo;
       	}
    }

    /**
     * Returns the currency format info associated with the specified culture.
     * @param CultureInfo the culture that gets the NumberFormat property.
     * @return NumberFormatInfo NumberFormatInfo for the specified
     * culture.
     */
    public static function getCurrencyInstance($culture=null)
    {
        return self::getInstance($culture, self::CURRENCY);
    }

    /**
     * Returns the percentage format info associated with the specified culture.
     * @param CultureInfo the culture that gets the NumberFormat property.
     * @return NumberFormatInfo NumberFormatInfo for the specified
     * culture.
     */
    public static function getPercentageInstance($culture=null)
    {
        return self::getInstance($culture, self::PERCENTAGE);
    }

    /**
     * Returns the scientific format info associated with the specified culture.
     * @param CultureInfo the culture that gets the NumberFormat property.
     * @return NumberFormatInfo NumberFormatInfo for the specified
     * culture.
     */
    public static function getScientificInstance($culture=null)
    {
        return self::getInstance($culture, self::SCIENTIFIC);
    }

    /**
     * Parse the given pattern and return a list of known properties.
     * @param string a number pattern.
     * @return array list of pattern properties.
     */
    protected function parsePattern($pattern)
	{
		$pattern = explode(';',$pattern);

		$negative = null;
		if(count($pattern) > 1)
			$negative = $pattern[1];
		$pattern = $pattern[0];

		$comma = ',';
		$dot = '.';
		$digit = '0';
		$hash = '#';

		//find the first group point, and decimal point
		$groupPos1 = strrpos($pattern,$comma);
		$decimalPos = strrpos($pattern,$dot);

		$groupPos2 = false;
		$groupSize1 = false;
		$groupSize2 = false;
		$decimalPoints = is_int($decimalPos)?-1:false;

		$info['negPref'] = $this->data['NumberElements'][6];
		$info['negPost'] = '';

		$info['negative'] = $negative;
		$info['positive'] = $pattern;

		//find the negative prefix and postfix
		if($negative)
		{
			$prefixPostfix = $this->getPrePostfix($negative);
			$info['negPref'] = $prefixPostfix[0];
			$info['negPost'] = $prefixPostfix[1];
		}

		$posfix = $this->getPrePostfix($pattern);
		$info['posPref'] = $posfix[0];
		$info['posPost'] = $posfix[1];

		//var_dump($pattern);
		//var_dump($decimalPos);
		if(is_int($groupPos1))
		{
			//get the second group
			$groupPos2 = strrpos(substr($pattern,0,$groupPos1),$comma);

			//get the number of decimal digits
			if(is_int($decimalPos))
			{
				$groupSize1 = $decimalPos - $groupPos1-1;

			}
			else
			{
				//no decimal point, so traverse from the back
				//to find the groupsize 1.
				for($i=strlen($pattern)-1; $i>=0; $i--)
				{
					if($pattern{$i} == $digit || $pattern{$i}==$hash)
					{
						$groupSize1 = $i - $groupPos1;
						break;
					}
				}
			}

			//get the second group size
			if(is_int($groupPos2))
				$groupSize2 = $groupPos1 - $groupPos2-1;
		}

		if(is_int($decimalPos))
		{
			for($i=strlen($pattern)-1; $i>=0; $i--)
			{
				if($pattern{$i} == $dot) break;
				if($pattern{$i} == $digit)
				{
					$decimalPoints = $i - $decimalPos;
					break;
				}
			}
		}

		if(is_int($decimalPos))
			$digitPattern = substr($pattern,0,$decimalPos);
		else
			$digitPattern  = $pattern;

		$digitPattern  = preg_replace('/[^0]/','',$digitPattern);

		$info['groupPos1'] = $groupPos1;
		$info['groupSize1'] = $groupSize1;
		$info['groupPos2'] = $groupPos2;
		$info['groupSize2'] = $groupSize2;
		$info['decimalPos'] = $decimalPos;
		$info['decimalPoints'] = $decimalPoints;
		$info['digitSize'] = strlen($digitPattern);
		return $info;
	}

	/**
	 * Get the prefix and postfix of a pattern.
	 * @param string pattern
	 * @return array of prefix and postfix, array(prefix,postfix).
	 */
	protected function getPrePostfix($pattern)
	{
		$regexp = '/[#,\.0]+/';
		$result = preg_split($regexp, $pattern);
		return array($result[0],$result[1]);
	}


    /**
     * Indicates the number of decimal places.
     * @return int number of decimal places.
     */
    function getDecimalDigits()
    {
    	return $this->pattern['decimalPoints'];
    }

    /**
     * Set the number of decimal places.
     * @param int number of decimal places.
     */
    function setDecimalDigits($value)
    {
    	return $this->pattern['decimalPoints'] = $value;
    }

    function getDigitSize()
    {
    	return $this->pattern['digitSize'];
    }

    function setDigitSize($value)
    {
    	$this->pattern['digitSize'] = $value;
    }

    /**
     * Gets the string to use as the decimal separator.
     * @return string decimal separator.
     */
    function getDecimalSeparator()
    {
    	return $this->data['NumberElements'][0];
    }

    /**
     * Set the string to use as the decimal separator.
     * @param string the decimal point
     */
    function setDecimalSeparator($value)
    {
    	return $this->data['NumberElements'][0] = $value;
    }

    /**
     * Gets the string that separates groups of digits to the left
     * of the decimal in currency values.
     * @param parameter
     * @return string currency group separator.
     */
    function getGroupSeparator()
    {
    	return $this->data['NumberElements'][1];
    }

    /**
     * Set the string to use as the group separator.
     * @param string the group separator.
     */
    function setGroupSeparator($value)
    {
    	return $this->data['NumberElements'][1] = $value;
    }

    /**
     * Gets the number of digits in each group to the left of the decimal
     * There can be two grouping sizes, this fucntion
     * returns <b>array(group1, group2)</b>, if there is only 1 grouping size,
     * group2 will be false.
     * @return array grouping size(s).
     */
    function getGroupSizes()
    {
    	$group1 = $this->pattern['groupSize1'];
    	$group2 = $this->pattern['groupSize2'];

    	return array($group1, $group2);
    }

    /**
     * Set the number of digits in each group to the left of the decimal.
     * There can be two grouping sizes, the value should
     * be an <b>array(group1, group2)</b>, if there is only 1 grouping size,
     * group2 should be false.
     * @param array grouping size(s).
     */
    function setGroupSizes($groupSize)
    {
   		$this->pattern['groupSize1'] = $groupSize[0];
   		$this->pattern['groupSize2'] = $groupSize[1];
    }

    /**
     * Gets the format pattern for negative values.
     * The negative pattern is composed of a prefix, and postfix.
     * This function returns <b>array(prefix, postfix)</b>.
     * @return arary negative pattern.
     */
    function getNegativePattern()
    {
    	$prefix = $this->pattern['negPref'];
    	$postfix = $this->pattern['negPost'];
    	return array($prefix, $postfix);
    }

    /**
     * Set the format pattern for negative values.
     * The negative pattern is composed of a prefix, and postfix in the form
     * <b>array(prefix, postfix)</b>.
     * @param arary negative pattern.
     */
    function setNegativePattern($pattern)
    {
    	$this->pattern['negPref'] = $pattern[0];
    	$this->pattern['negPost'] = $pattern[1];
    }

    /**
     * Gets the format pattern for positive values.
     * The positive pattern is composed of a prefix, and postfix.
     * This function returns <b>array(prefix, postfix)</b>.
     * @return arary positive pattern.
     */
    function getPositivePattern()
    {
    	$prefix = $this->pattern['posPref'];
    	$postfix = $this->pattern['posPost'];
    	return array($prefix, $postfix);
    }

    /**
     * Set the format pattern for positive values.
     * The positive pattern is composed of a prefix, and postfix in the form
     * <b>array(prefix, postfix)</b>.
     * @param arary positive pattern.
     */
    function setPositivePattern($pattern)
    {
    	$this->pattern['posPref'] = $pattern[0];
    	$this->pattern['posPost'] = $pattern[1];
    }

    /**
     * Gets the string to use as the currency symbol.
     * @return string currency symbol.
     */
    function getCurrencySymbol($currency='USD')
    {
    	if(isset($this->pattern['symbol']))
			return $this->pattern['symbol'];
    	else
    		return $this->data['Currencies'][$currency][0];
    }


    /**
     * Set the string to use as the currency symbol.
     * @param string currency symbol.
     */
    function setCurrencySymbol($symbol)
    {
    	$this->pattern['symbol'] = $symbol;
    }

    /**
     * Gets the string that represents negative infinity.
     * @return string negative infinity.
     */
    function getNegativeInfinitySymbol()
    {
		return $this->pattern['negInfty'];
    }

    /**
     * Set the string that represents negative infinity.
     * @param string negative infinity.
     */
    function setNegativeInfinitySymbol($value)
    {
		$this->pattern['negInfty'] = $value;
    }

    /**
     * Gets the string that represents positive infinity.
     * @return string positive infinity.
     */
    function getPositiveInfinitySymbol()
    {
		return $this->pattern['posInfty'];
    }

    /**
     * Set the string that represents positive infinity.
     * @param string positive infinity.
     */
    function setPositiveInfinitySymbol($value)
    {
		$this->pattern['posInfty'] = $value;
    }

    /**
     * Gets the string that denotes that the associated number is negative.
     * @return string negative sign.
     */
    function getNegativeSign()
    {
    	return $this->data['NumberElements'][6];
    }

    /**
     * Set the string that denotes that the associated number is negative.
     * @param string negative sign.
     */
    function setNegativeSign($value)
    {
    	$this->data['NumberElements'][6] = $value;
    }

    /**
     * Gets the string that denotes that the associated number is positive.
     * @return string positive sign.
     */
    function getPositiveSign()
    {
    	return $this->data['NumberElements'][11];
    }

    /**
     * Set the string that denotes that the associated number is positive.
     * @param string positive sign.
     */
    function setPositiveSign($value)
    {
    	$this->data['NumberElements'][11] = $value;
    }

    /**
     * Gets the string that represents the IEEE NaN (not a number) value.
     * @return string NaN symbol.
     */
    function getNaNSymbol()
    {
    	return $this->data['NumberElements'][10];
    }

    /**
     * Set the string that represents the IEEE NaN (not a number) value.
     * @param string NaN symbol.
     */
    function setNaNSymbol($value)
    {
    	$this->data['NumberElements'][10] = $value;
    }

    /**
     * Gets the string to use as the percent symbol.
     * @return string percent symbol.
     */
    function getPercentSymbol()
    {
    	return $this->data['NumberElements'][3];
    }

    /**
     * Set the string to use as the percent symbol.
     * @param string percent symbol.
     */
    function setPercentSymbol($value)
    {
    	$this->data['NumberElements'][3] = $value;
    }

    /**
     * Gets the string to use as the per mille symbol.
     * @return string percent symbol.
     */
    function getPerMilleSymbol()
    {
    	return $this->data['NumberElements'][8];
    }

    /**
     * Set the string to use as the per mille symbol.
     * @param string percent symbol.
     */
    function setPerMilleSymbol($value)
    {
    	$this->data['NumberElements'][8] = $value;
    }
}