'use strict';

var parsers = require('../parsers');

// <length> <length>? | inherit // if one, it applies to both horizontal and verical spacing // if two, the first applies to the horizontal and the second applies to vertical spacing

var parse = function parse(v) {

if (v === '' || v === null) {
    return undefined;
}
if (v.toLowerCase() === 'inherit') {
    return v;
}
var parts = v.split(/\s+/);
if (parts.length !== 1 && parts.length !== 2) {
    return undefined;
}
parts.forEach(function (part) {
    if (parsers.valueType(part) !== parsers.TYPES.LENGTH) {
        return undefined;
    }
});

return v;

};

module.exports.isValid = function isValid(v) {

return parse(v) !== undefined;

};

module.exports.definition = {

set: function (v) {
    this._setProperty('border-spacing', parse(v));
},
get: function () {
    return this.getPropertyValue('border-spacing');
},
enumerable: true,
configurable: true

};