// test for SERVER-6303 - if documents move backward during an initial sync.

import {ReplSetTest} from "jstests/libs/replsettest.js";

let rt = new ReplSetTest({name: "replset8", nodes: 1});

let nodes = rt.startSet();
rt.initiate();
let primary = rt.getPrimary();
let bigstring = "a";
let md = primary.getDB("d");
let mdc = md["c"];

// prep the data

// idea: create x documents of increasing size, then create x documents of size n.
//       delete first x documents.  start initial sync (cloner).  update all remaining
//       documents to be increasing size.
//       this should result in the updates moving the docs backwards.

let doccount = 5000;
// Avoid empty extent issues
mdc.insert({_id: -1, x: "dummy"});

jsTestLog("inserting " + doccount + " bigstrings");
let bulk = mdc.initializeUnorderedBulkOp();
for (var i = 0; i < doccount; ++i) {
    bulk.insert({_id: i, x: bigstring});
    bigstring += "a";
}
let result = assert.commandWorked(bulk.execute());
jsTestLog("insert 0-" + (doccount - 1) + " result: " + tojson(result));
assert.eq(doccount, result.nInserted);
assert.eq(doccount + 1, mdc.find().itcount());

jsTestLog(
    "inserting " +
        doccount * 2 +
        " documents - {_id: 0, x: 0} ... {_id: " +
        (doccount * 2 - 1) +
        ", x: " +
        (doccount * 2 - 1) +
        "}",
);
bulk = mdc.initializeUnorderedBulkOp();
for (i = doccount; i < doccount * 2; ++i) {
    bulk.insert({_id: i, x: i});
}
result = assert.commandWorked(bulk.execute());
jsTestLog("insert " + doccount + "-" + (doccount * 2 - 1) + " result: " + tojson(result));
assert.eq(doccount, result.nInserted);
assert.eq(doccount * 2 + 1, mdc.find().itcount());

jsTestLog("deleting " + doccount + " bigstrings");
bulk = mdc.initializeUnorderedBulkOp();
for (i = 0; i < doccount; ++i) {
    bulk.find({_id: i}).remove();
}
result = assert.commandWorked(bulk.execute());
jsTestLog("delete 0-" + (doccount - 1) + " result: " + tojson(result));
assert.eq(doccount, result.nRemoved);
assert.eq(doccount + 1, mdc.find().itcount());

// add a secondary
let secondary = rt.add();
rt.reInitiate();
jsTestLog("reinitiation complete after adding new node to replicaset");
rt.awaitSecondaryNodes();
jsTestLog("updating documents backwards");
// Move all documents to the beginning by growing them to sizes that should
// fit the holes we made in phase 1
bulk = mdc.initializeUnorderedBulkOp();
for (i = doccount * 2; i > doccount; --i) {
    bulk.find({_id: i}).update({$set: {x: bigstring}});
    bigstring = bigstring.slice(0, -1); // remove last char
}
result = assert.commandWorked(bulk.execute({w: rt.nodes.length}));
jsTestLog("update " + (doccount + 1) + "-" + (doccount * 2 - 1) + " result: " + tojson(result));
assert.eq(doccount - 1, result.nMatched);
assert.eq(doccount - 1, result.nModified);

assert.eq(doccount + 1, mdc.find().itcount(), "incorrect collection size on primary (fast count: " + mdc.count() + ")");
assert.eq(
    doccount + 1,
    secondary.getDB("d")["c"].find().itcount(),
    "incorrect collection size on secondary  (fast count: " + secondary.getDB("d")["c"].count() + ")",
);

jsTestLog("finished");
rt.stopSet();