/*!
 * accounting.js v0.4.2
 * Copyright 2014 Open Exchange Rates
 *
 * Freely distributable under the MIT license.
 * Portions of accounting.js are inspired or borrowed from underscore.js
 *
 * Full details and documentation:
 * http://openexchangerates.github.io/accounting.js/
 */
(function(root, undefined) {
	/* --- Setup --- */
	// Create the local library object, to be exported or referenced globally later
	var lib = {};
	// Current version
	lib.version = '0.4.2';
	/* --- Exposed settings --- */
	// The library's settings configuration object. Contains default parameters for
	// currency and number formatting
	lib.settings = {
 currency: {
 symbol : "$",		// default currency symbol is '$'
 format : "%s%v",	// controls output: %s = symbol, %v = value (can be object, see docs)
 decimal : ".",		// decimal point separator
 thousand : ",",		// thousands separator
 precision : 2,		// decimal places
 grouping : 3		// digit grouping (not implemented yet)
 },
 number: {
 precision : 0,		// default precision on numbers is 0
 grouping : 3,		// digit grouping (not implemented yet)
 thousand : ",",
 decimal : "."
 }
	};
	/* --- Internal Helper Methods --- */
	// Store reference to possibly-available ECMAScript 5 methods for later
	var nativeMap = Array.prototype.map,
 nativeIsArray = Array.isArray,
 toString = Object.prototype.toString;
	/**
 * Tests whether supplied parameter is a string
 * from underscore.js
 */
	function isString(obj) {
 return !!(obj === '' || (obj && obj.charCodeAt && obj.substr));
	}
	/**
 * Tests whether supplied parameter is an array
 * from underscore.js, delegates to ECMA5's native Array.isArray
 */
	function isArray(obj) {
 return nativeIsArray ? nativeIsArray(obj) : toString.call(obj) === '[object Array]';
	}
	/**
 * Tests whether supplied parameter is a true object
 */
	function isObject(obj) {
 return obj && toString.call(obj) === '[object Object]';
	}
	/**
 * Extends an object with a defaults object, similar to underscore's _.defaults
 *
 * Used for abstracting parameter handling from API methods
 */
	function defaults(object, defs) {
 var key;
 object = object || {};
 defs = defs || {};
 // Iterate over object non-prototype properties:
 for (key in defs) {
 if (defs.hasOwnProperty(key)) {
 // Replace values with defaults only if undefined (allow empty/zero values):
 if (object[key] == null) object[key] = defs[key];
 }
 }
 return object;
	}
	/**
 * Implementation of `Array.map()` for iteration loops
 *
 * Returns a new Array as a result of calling `iterator` on each array value.
 * Defers to native Array.map if available
 */
	function map(obj, iterator, context) {
 var results = [], i, j;
 if (!obj) return results;
 // Use native .map method if it exists:
 if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
 // Fallback for native .map:
 for (i = 0, j = obj.length; i <j; i++ ) {
 results[i] = iterator.call(context, obj[i], i, obj);
 }
 return results;
	}
	/**
 * Check and normalise the value of precision (must be positive integer)
 */
	function checkPrecision(val, base) {
 val = Math.round(Math.abs(val));
 return isNaN(val)? base : val;
	}
	/**
 * Parses a format string or object and returns format obj for use in rendering
 *
 * `format` is either a string with the default (positive) format, or object
 * containing `pos` (required), `neg` and `zero` values (or a function returning
 * either a string or object)
 *
 * Either string or format.pos must contain "%v" (value) to be valid
 */
	function checkCurrencyFormat(format) {
 var defaults = lib.settings.currency.format;
 // Allow function as format parameter (should return string or object):
 if ( typeof format === "function" ) format = format();
 // Format can be a string, in which case `value` ("%v") must be present:
 if ( isString( format ) && format.match("%v") ) {
 // Create and return positive, negative and zero formats:
 return {
 pos : format,
 neg : format.replace("-", "").replace("%v", "-%v"),
 zero : format
 };
 // If no format, or object is missing valid positive value, use defaults:
 } else if ( !format || !format.pos || !format.pos.match("%v") ) {
 // If defaults is a string, casts it to an object for faster checking next time:
 return ( !isString( defaults ) ) ? defaults : lib.settings.currency.format = {
 pos : defaults,
 neg : defaults.replace("%v", "-%v"),
 zero : defaults
 };
 }
 // Otherwise, assume format was fine:
 return format;
	}
	/* --- API Methods --- */
	/**
 * Takes a string/array of strings, removes all formatting/cruft and returns the raw float value
 * Alias: `accounting.parse(string)`
 *
 * Decimal must be included in the regular expression to match floats (defaults to
 * accounting.settings.number.decimal), so if the number uses a non-standard decimal
 * separator, provide it as the second argument.
 *
 * Also matches bracketed negatives (eg. "$ (1.99)" => -1.99)
 *
 * Doesn't throw any errors (`NaN`s become 0) but this may change in future
 */
	var unformat = lib.unformat = lib.parse = function(value, decimal) {
 // Recursively unformat arrays:
 if (isArray(value)) {
 return map(value, function(val) {
 return unformat(val, decimal);
 });
 }
 // Fails silently (need decent errors):
 value = value || 0;
 // Return the value as-is if it's already a number:
 if (typeof value === "number") return value;
 // Default decimal point comes from settings, but could be set to eg. "," in opts:
 decimal = decimal || lib.settings.number.decimal;
 // Build regex to strip out everything except digits, decimal point and minus sign:
 var regex = new RegExp("[^0-9-" + decimal + "]", ["g"]),
 unformatted = parseFloat(
 ("" + value)
 .replace(/\((?=\d+)(.*)\)/, "-$1") // replace bracketed values with negatives
 .replace(regex, '')         // strip out any cruft
 .replace(decimal, '.')      // make sure decimal point is standard
 );
 // This will fail silently which may cause trouble, let's wait and see:
 return !isNaN(unformatted) ? unformatted : 0;
	};
	/**
 * Implementation of toFixed() that treats floats more like decimals
 *
 * Fixes binary rounding issues (eg. (0.615).toFixed(2) === "0.61") that present
 * problems for accounting- and finance-related software.
 */
	var toFixed = lib.toFixed = function(value, precision) {
 precision = checkPrecision(precision, lib.settings.number.precision);
 var exponentialForm = Number(lib.unformat(value) + 'e' + precision);
 var rounded = Math.round(exponentialForm);
 var finalResult = Number(rounded + 'e-' + precision).toFixed(precision);
 return finalResult;
	};
	/**
 * Format a number, with comma-separated thousands and custom precision/decimal places
 * Alias: `accounting.format()`
 *
 * Localise by overriding the precision and thousand / decimal separators
 * 2nd parameter `precision` can be an object matching `settings.number`
 */
	var formatNumber = lib.formatNumber = lib.format = function(number, precision, thousand, decimal) {
 // Resursively format arrays:
 if (isArray(number)) {
 return map(number, function(val) {
 return formatNumber(val, precision, thousand, decimal);
 });
 }
 // Clean up number:
 number = unformat(number);
 // Build options object from second param (if object) or all params, extending defaults:
 var opts = defaults(
 (isObject(precision) ? precision : {
 precision : precision,
 thousand : thousand,
 decimal : decimal
 }),
 lib.settings.number
 ),
 // Clean up precision
 usePrecision = checkPrecision(opts.precision),
 // Do some calc:
 negative = number <0 ? "-" : "",
 base = parseInt(toFixed(Math.abs(number || 0), usePrecision), 10) + "",
 mod = base.length> 3 ? base.length % 3 : 0;
 // Format the number:
 return negative + (mod ? base.substr(0, mod) + opts.thousand : "") + base.substr(mod).replace(/(\d{3})(?=\d)/g, "$1" + opts.thousand) + (usePrecision ? opts.decimal + toFixed(Math.abs(number), usePrecision).split('.')[1] : "");
	};
	/**
 * Format a number into currency
 *
 * Usage: accounting.formatMoney(number, symbol, precision, thousandsSep, decimalSep, format)
 * defaults: (0, "$", 2, ",", ".", "%s%v")
 *
 * Localise by overriding the symbol, precision, thousand / decimal separators and format
 * Second param can be an object matching `settings.currency` which is the easiest way.
 *
 * To do: tidy up the parameters
 */
	var formatMoney = lib.formatMoney = function(number, symbol, precision, thousand, decimal, format) {
 // Resursively format arrays:
 if (isArray(number)) {
 return map(number, function(val){
 return formatMoney(val, symbol, precision, thousand, decimal, format);
 });
 }
 // Clean up number:
 number = unformat(number);
 // Build options object from second param (if object) or all params, extending defaults:
 var opts = defaults(
 (isObject(symbol) ? symbol : {
 symbol : symbol,
 precision : precision,
 thousand : thousand,
 decimal : decimal,
 format : format
 }),
 lib.settings.currency
 ),
 // Check format (returns object with pos, neg and zero):
 formats = checkCurrencyFormat(opts.format),
 // Choose which format to use for this value:
 useFormat = number> 0 ? formats.pos : number <0 ? formats.neg : formats.zero;
 // Return with currency symbol added:
 return useFormat.replace('%s', opts.symbol).replace('%v', formatNumber(Math.abs(number), checkPrecision(opts.precision), opts.thousand, opts.decimal));
	};
	/**
 * Format a list of numbers into an accounting column, padding with whitespace
 * to line up currency symbols, thousand separators and decimals places
 *
 * List should be an array of numbers
 * Second parameter can be an object containing keys that match the params
 *
 * Returns array of accouting-formatted number strings of same length
 *
 * NB: `white-space:pre` CSS rule is required on the list container to prevent
 * browsers from collapsing the whitespace in the output strings.
 */
	lib.formatColumn = function(list, symbol, precision, thousand, decimal, format) {
 if (!list || !isArray(list)) return [];
 // Build options object from second param (if object) or all params, extending defaults:
 var opts = defaults(
 (isObject(symbol) ? symbol : {
 symbol : symbol,
 precision : precision,
 thousand : thousand,
 decimal : decimal,
 format : format
 }),
 lib.settings.currency
 ),
 // Check format (returns object with pos, neg and zero), only need pos for now:
 formats = checkCurrencyFormat(opts.format),
 // Whether to pad at start of string or after currency symbol:
 padAfterSymbol = formats.pos.indexOf("%s") <formats.pos.indexOf("%v") ? true : false,
 // Store value for the length of the longest string in the column:
 maxLength = 0,
 // Format the list according to options, store the length of the longest string:
 formatted = map(list, function(val, i) {
 if (isArray(val)) {
 // Recursively format columns if list is a multi-dimensional array:
 return lib.formatColumn(val, opts);
 } else {
 // Clean up the value
 val = unformat(val);
 // Choose which format to use for this value (pos, neg or zero):
 var useFormat = val> 0 ? formats.pos : val <0 ? formats.neg : formats.zero,
 // Format this value, push into formatted list and save the length:
 fVal = useFormat.replace('%s', opts.symbol).replace('%v', formatNumber(Math.abs(val), checkPrecision(opts.precision), opts.thousand, opts.decimal));
 if (fVal.length> maxLength) maxLength = fVal.length;
 return fVal;
 }
 });
 // Pad each number in the list and send back the column of numbers:
 return map(formatted, function(val, i) {
 // Only if this is a string (not a nested array, which would have already been padded):
 if (isString(val) && val.length <maxLength) {
 // Depending on symbol position, pad after symbol or at index 0:
 return padAfterSymbol ? val.replace(opts.symbol, opts.symbol+(new Array(maxLength - val.length + 1).join(" "))) : (new Array(maxLength - val.length + 1).join(" ")) + val;
 }
 return val;
 });
	};
	/* --- Module Definition --- */
	// Export accounting for CommonJS. If being loaded as an AMD module, define it as such.
	// Otherwise, just add `accounting` to the global object
	if (typeof exports !== 'undefined') {
 if (typeof module !== 'undefined' && module.exports) {
 exports = module.exports = lib;
 }
 exports.accounting = lib;
	} else if (typeof define === 'function' && define.amd) {
 // Return the library as an AMD module:
 define([], function() {
 return lib;
 });
	} else {
 // Use accounting.noConflict to restore `accounting` back to its original value.
 // Returns a reference to the library's `accounting` object;
 // e.g. `var numbers = accounting.noConflict();`
 lib.noConflict = (function(oldAccounting) {
 return function() {
 // Reset the value of the root's `accounting` variable:
 root.accounting = oldAccounting;
 // Delete the noConflict method:
 lib.noConflict = undefined;
 // Return reference to the library to re-assign it:
 return lib;
 };
 })(root.accounting);
 // Declare `fx` on the root (global/window) object:
 root['accounting'] = lib;
	}
	// Root will be `window` in browser or `global` on the server:
}(this));