// @tags: [does_not_support_stepdowns]

(function() {
    "use strict";

    load("jstests/aggregation/extras/utils.js");  // For resultsEq.

    const t = db.mr5;
    t.drop();

    assert.writeOK(t.insert({"partner": 1, "visits": 9}));
    assert.writeOK(t.insert({"partner": 2, "visits": 9}));
    assert.writeOK(t.insert({"partner": 1, "visits": 11}));
    assert.writeOK(t.insert({"partner": 1, "visits": 30}));
    assert.writeOK(t.insert({"partner": 2, "visits": 41}));
    assert.writeOK(t.insert({"partner": 2, "visits": 41}));

    let mapper = function() {
        emit(this.partner, {stats: [this.visits]});
    };

    const reducer = function(k, v) {
        var stats = [];
        var total = 0;
        for (var i = 0; i < v.length; i++) {
            for (var j in v[i].stats) {
                stats.push(v[i].stats[j]);
                total += v[i].stats[j];
            }
        }
        return {stats: stats, total: total};
    };

    let res = t.mapReduce(mapper, reducer, {out: "mr5_out", scope: {xx: 1}});

    let resultAsObj = res.convertToSingleObject();
    assert.eq(2,
              Object.keySet(resultAsObj).length,
              `Expected 2 keys ("1" and "2") in object ${tojson(resultAsObj)}`);
    // Use resultsEq() to avoid any assumptions about order.
    assert(resultsEq([9, 11, 30], resultAsObj["1"].stats));
    assert(resultsEq([9, 41, 41], resultAsObj["2"].stats));

    res.drop();

    mapper = function() {
        var x = "partner";
        var y = "visits";
        emit(this[x], {stats: [this[y]]});
    };

    res = t.mapReduce(mapper, reducer, {out: "mr5_out", scope: {xx: 1}});

    resultAsObj = res.convertToSingleObject();
    assert.eq(2,
              Object.keySet(resultAsObj).length,
              `Expected 2 keys ("1" and "2") in object ${tojson(resultAsObj)}`);
    // Use resultsEq() to avoid any assumptions about order.
    assert(resultsEq([9, 11, 30], resultAsObj["1"].stats));
    assert(resultsEq([9, 41, 41], resultAsObj["2"].stats));

    res.drop();
}());