/**
 * This tests that preparing a transaction successfully will update the lastWriteOpTime on
 * secondaries so that the corresponding commitTransaction oplog entry has a correct prevOpTime.
 * The test exercises a failover right after a prepare, so that we have to commit the transaction
 * while talking to a node that was in secondary state when it was prepared. We commit that
 * transaction, then roll back that commit entry, the success of which depends on the prevOpTime
 * being set properly.
 *
 * @tags: [
 *   uses_prepare_transaction,
 *   uses_transactions,
 * ]
 */
(function() {
"use strict";
load("jstests/replsets/libs/rollback_test.js");
load("jstests/core/txns/libs/prepare_helpers.js");

const dbName = "test";
const collName = "prepare_failover_rollback_commit";

const rollbackTest = new RollbackTest(collName);

let primary = rollbackTest.getPrimary();
const testDB = primary.getDB(dbName);
const testColl = testDB.getCollection(collName);

// First create the collection for all.
assert.commandWorked(testColl.insert({"a": "baseDoc"}));

const session = primary.startSession();
const sessionDB = session.getDatabase(dbName);
const sessionColl = sessionDB.getCollection(collName);

session.startTransaction();
assert.commandWorked(sessionColl.insert({"b": "transactionDoc"}));

// Prepare a transaction. This will be replicated to the secondary.
const prepareTimestamp = PrepareHelpers.prepareTransaction(session);

// Do a failover first, without rolling back any of the data from this test. We want the
// current secondary to become primary and inherit the prepared transaction.
rollbackTest.transitionToRollbackOperations();
rollbackTest.transitionToSyncSourceOperationsBeforeRollback();
rollbackTest.transitionToSyncSourceOperationsDuringRollback();
rollbackTest.transitionToSteadyStateOperations({skipDataConsistencyChecks: true});

// Now set up a rollback scenario for that new primary.
rollbackTest.transitionToRollbackOperations();

// Create a proxy session to reuse the session state of the old primary.
primary = rollbackTest.getPrimary();
const newSession1 = new _DelegatingDriverSession(primary, session);

// Commit the transaction on this primary. We expect the commit to roll back.
assert.commandWorked(PrepareHelpers.commitTransaction(newSession1, prepareTimestamp));

rollbackTest.transitionToSyncSourceOperationsBeforeRollback();
rollbackTest.transitionToSyncSourceOperationsDuringRollback();
rollbackTest.transitionToSteadyStateOperations({skipDataConsistencyChecks: true});

// Create a proxy session to reuse the session state of the old primary.
primary = rollbackTest.getPrimary();
const newSession2 = new _DelegatingDriverSession(primary, session);

// Commit the transaction for all to conclude the test.
assert.commandWorked(PrepareHelpers.commitTransaction(newSession2, prepareTimestamp));

rollbackTest.stop();
})();