var current = (process.versions && process.versions.node && process.versions.node.split('.')) || [];

function specifierIncluded(specifier) {

var parts = specifier.split(' ');
var op = parts.length > 1 ? parts[0] : '=';
var versionParts = (parts.length > 1 ? parts[1] : parts[0]).split('.');

for (var i = 0; i < 3; ++i) {
    var cur = Number(current[i] || 0);
    var ver = Number(versionParts[i] || 0);
    if (cur === ver) {
        continue; // eslint-disable-line no-restricted-syntax, no-continue
    }
    if (op === '<') {
        return cur < ver;
    } else if (op === '>=') {
        return cur >= ver;
    } else {
        return false;
    }
}
return op === '>=';

}

function matchesRange(range) {

var specifiers = range.split(/ ?&& ?/);
if (specifiers.length === 0) { return false; }
for (var i = 0; i < specifiers.length; ++i) {
    if (!specifierIncluded(specifiers[i])) { return false; }
}
return true;

}

function versionIncluded(specifierValue) {

if (typeof specifierValue === 'boolean') { return specifierValue; }
if (specifierValue && typeof specifierValue === 'object') {
    for (var i = 0; i < specifierValue.length; ++i) {
        if (matchesRange(specifierValue[i])) { return true; }
    }
    return false;
}
return matchesRange(specifierValue);

}

var data = require('./core.json');

var core = {}; for (var mod in data) { // eslint-disable-line no-restricted-syntax

if (Object.prototype.hasOwnProperty.call(data, mod)) {
    core[mod] = versionIncluded(data[mod]);
}

} module.exports = core;