'use strict';

/**
 * indexed_insert_2d.js
 *
 * Inserts documents into an indexed collection and asserts that the documents
 * appear in both a collection scan and an index scan. The indexed value is a
 * legacy coordinate pair, indexed with a 2d index.
 */
load('jstests/concurrency/fsm_libs/extend_workload.js'); // for extendWorkload
load('jstests/concurrency/fsm_workloads/indexed_insert_base.js'); // for $config

var $config = extendWorkload($config, function($config, $super) {

    $config.data.indexedField = 'indexed_insert_2d';

    $config.states.init = function init(db, collName) {
        $super.states.init.apply(this, arguments);

        assertAlways.lt(this.tid, 1 << 16); // assume tid is a 16 bit nonnegative int
        // split the tid into the odd bits and the even bits
        // for example:
        //  tid:  57 = 00111001
        //  even:      0 1 0 1  = 5
        //  odd:        0 1 1 0 = 6
        // This lets us turn every tid into a unique pair of numbers within the range [0, 255].
        // The pairs are then normalized to have valid longitude and latitude values.
        var oddBits = 0;
        var evenBits = 0;
        for (var i = 0; i < 16; ++i) {
            if (this.tid & 1 << i) {
                if (i % 2 === 0) {
                    // i is even
                    evenBits |= 1 << (i / 2);
                } else {
                    // i is odd
                    oddBits |= 1 << (i / 2);
                }
            }
        }
        assertAlways.lt(oddBits, 256);
        assertAlways.lt(evenBits, 256);
        this.indexedValue = [(evenBits - 128) / 2, (oddBits - 128) / 2];
    };

    $config.data.getIndexSpec = function getIndexSpec() {
        var ixSpec = {};
        ixSpec[this.indexedField] = '2d';
        return ixSpec;
    };

    return $config;
});
