"use strict";

var sort = require("./prototypes/array").sort;
var slice = require("./prototypes/array").slice;

function comparator(a, b) {
    // uuid, won't ever be equal
    var aCall = a.getCall(0);
    var bCall = b.getCall(0);
    var aId = (aCall && aCall.callId) || -1;
    var bId = (bCall && bCall.callId) || -1;

    return aId < bId ? -1 : 1;
}

module.exports = function orderByFirstCall(spies) {
    return sort(slice(spies), comparator);
};