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import { Duration, isDuration } from './constructor';
import toInt from '../utils/to-int';
import hasOwnProp from '../utils/has-own-prop';
import { DATE, HOUR, MINUTE, SECOND, MILLISECOND } from '../units/constants';
import { cloneWithOffset } from '../units/offset';
import { createLocal } from '../create/local';
// ASP.NET json date format regex
var aspNetRegex = /(\-)?(?:(\d*)\.)?(\d+)\:(\d+)(?:\:(\d+)\.?(\d{3})?)?/;
// from http://docs.closure-library.googlecode.com/git/closure_goog_date_date.js.source.html
// somewhat more in line with 4.4.3.2 2004 spec, but allows decimal anywhere
var isoRegex = /^(-)?P(?:(?:([0-9,.]*)Y)?(?:([0-9,.]*)M)?(?:([0-9,.]*)D)?(?:T(?:([0-9,.]*)H)?(?:([0-9,.]*)M)?(?:([0-9,.]*)S)?)?|([0-9,.]*)W)$/;
export function createDuration (input, key) {
var duration = input,
// matching against regexp is expensive, do it on demand
match = null,
sign,
ret,
diffRes;
if (isDuration(input)) {
duration = {
ms : input._milliseconds,
d : input._days,
M : input._months
};
} else if (typeof input === 'number') {
duration = {};
if (key) {
duration[key] = input;
} else {
duration.milliseconds = input;
}
} else if (!!(match = aspNetRegex.exec(input))) {
sign = (match[1] === '-') ? -1 : 1;
duration = {
y : 0,
d : toInt(match[DATE]) * sign,
h : toInt(match[HOUR]) * sign,
m : toInt(match[MINUTE]) * sign,
s : toInt(match[SECOND]) * sign,
ms : toInt(match[MILLISECOND]) * sign
};
} else if (!!(match = isoRegex.exec(input))) {
sign = (match[1] === '-') ? -1 : 1;
duration = {
y : parseIso(match[2], sign),
M : parseIso(match[3], sign),
d : parseIso(match[4], sign),
h : parseIso(match[5], sign),
m : parseIso(match[6], sign),
s : parseIso(match[7], sign),
w : parseIso(match[8], sign)
};
} else if (duration == null) {// checks for null or undefined
duration = {};
} else if (typeof duration === 'object' && ('from' in duration || 'to' in duration)) {
diffRes = momentsDifference(createLocal(duration.from), createLocal(duration.to));
duration = {};
duration.ms = diffRes.milliseconds;
duration.M = diffRes.months;
}
ret = new Duration(duration);
if (isDuration(input) && hasOwnProp(input, '_locale')) {
ret._locale = input._locale;
}
return ret;
}
createDuration.fn = Duration.prototype;
function parseIso (inp, sign) {
// We'd normally use ~~inp for this, but unfortunately it also
// converts floats to ints.
// inp may be undefined, so careful calling replace on it.
var res = inp && parseFloat(inp.replace(',', '.'));
// apply sign while we're at it
return (isNaN(res) ? 0 : res) * sign;
}
function positiveMomentsDifference(base, other) {
var res = {milliseconds: 0, months: 0};
res.months = other.month() - base.month() +
(other.year() - base.year()) * 12;
if (base.clone().add(res.months, 'M').isAfter(other)) {
--res.months;
}
res.milliseconds = +other - +(base.clone().add(res.months, 'M'));
return res;
}
function momentsDifference(base, other) {
var res;
other = cloneWithOffset(other, base);
if (base.isBefore(other)) {
res = positiveMomentsDifference(base, other);
} else {
res = positiveMomentsDifference(other, base);
res.milliseconds = -res.milliseconds;
res.months = -res.months;
}
return res;
}
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