//
// N0(p), N1(s), N2(s)
// N1 and N2 have priority 0, cannot be primary
// N0 gets restarted, and after oplog truncation, is behind N1 and N2
//
// Neither secondary can step up, and N0 cannot sync its missing oplog entries
// with chainingAllowed: false, so it cannot be primary either.
//

import {ReplSetTest} from "jstests/libs/replsettest.js"
import {PrepareHelpers} from "jstests/core/txns/libs/prepare_helpers.js";

let name = "no_stepup_when_primary_behind";
let rst = new ReplSetTest({
  name: name,
  nodes: {
    n0: {},
    n1: {},
    n2: {},
  },
});
rst.startSet();

const conf = rst.getReplSetConfig();
conf.members[1].priority = 0;
conf.members[2].priority = 0;
conf.settings = {
  heartbeatIntervalMillis: 500,
  electionTimeoutMillis: 5000,
  chainingAllowed: false,
};

rst.initiate(conf);
rst.awaitNodesAgreeOnPrimary();

const primary = rst.getPrimary();
jsTestLog(`PRIMARY=${primary.name}`);
primary.adminCommand({
  configureFailPoint: "pauseJournalFlusherThread",
  mode: "alwaysOn"}
);
primary.adminCommand({
  configureFailPoint: "pauseJournalFlusherBeforeFlush",
  mode: "alwaysOn"}
);
primary.getDB("test").test.insert({key0: "value0"});
primary.getDB("test").test.insert({key1: "value1"});

const primaryId = rst.getNodeId(primary);
rst.stop(primaryId, MongoRunner.EXIT_SIGKILL, {forRestart: true, allowedExitCode: MongoRunner.EXIT_SIGKILL});
rst.start(primaryId, {waitForConnect:true}, true);
jsTestLog("kill+restart complete");

// this is what shouldn't happen after we improve how mongod handles this configuration
rst.awaitNoPrimary();
rst.stopSet();