/**
 * Tests that using a UUID as an argument to commands will retrieve results from the correct
 * collection.
 *
 * @tags: [
 *    requires_fastcount,
 *
 *    incompatible_with_embedded,
 * ]
 */

(function() {
'use strict';
const mainCollName = 'main_coll';
const subCollName = 'sub_coll';
const kOtherDbName = 'commands_with_uuid_db';
db.runCommand({drop: mainCollName});
db.runCommand({drop: subCollName});
assert.commandWorked(db.runCommand({create: mainCollName}));
assert.commandWorked(db.runCommand({create: subCollName}));

// Check if UUIDs are enabled / supported.
let collectionInfos = db.getCollectionInfos({name: mainCollName});
let uuid = collectionInfos[0].info.uuid;
if (uuid == null) {
    return;
}

// No support for UUIDs on mongos.
const isMaster = db.runCommand("ismaster");
assert.commandWorked(isMaster);
const isMongos = (isMaster.msg === "isdbgrid");
if (isMongos) {
    return;
}

assert.commandWorked(db.runCommand({insert: mainCollName, documents: [{fooField: 'FOO'}]}));
assert.commandWorked(
    db.runCommand({insert: subCollName, documents: [{fooField: 'BAR'}, {fooField: 'FOOBAR'}]}));

// Ensure passing a UUID to find retrieves results from the correct collection.
let cmd = {find: uuid};
let res = db.runCommand(cmd);
assert.commandWorked(res, 'could not run ' + tojson(cmd));
let cursor = new DBCommandCursor(db, res);
let errMsg = 'expected more data from command ' + tojson(cmd) + ', with result ' + tojson(res);
assert(cursor.hasNext(), errMsg);
let doc = cursor.next();
assert.eq(doc.fooField, 'FOO');
assert(!cursor.hasNext(), 'expected to have exhausted cursor for results ' + tojson(res));

// Although we check for both string type and BinData type for the collection identifier
// argument to a find command to accomodate for searching both by name and by UUID, if an
// invalid type is passed, the parsing error message should say the expected type is string and
// not BinData to avoid confusing the user.
cmd = {
    find: 1.0
};
res = db.runCommand(cmd);
assert.commandFailed(res, 'expected ' + tojson(cmd) + ' to fail.');
assert(res.errmsg.includes('field must be of BSON type string'),
       'expected the error message of ' + tojson(res) + ' to include string type');

// Ensure passing a missing UUID to commands taking UUIDs uasserts that the UUID is not found.
const missingUUID = UUID();
for (cmd of [{count: missingUUID}, {find: missingUUID}, {listIndexes: missingUUID}]) {
    assert.commandFailedWithCode(
        db.runCommand(cmd), ErrorCodes.NamespaceNotFound, "command: " + tojson(cmd));
}

// Ensure passing a UUID to listIndexes retrieves results from the correct collection.
cmd = {
    listIndexes: uuid
};
res = db.runCommand(cmd);
assert.commandWorked(res, 'could not run ' + tojson(cmd));
cursor = new DBCommandCursor(db, res);
assert.eq(1, cursor.toArray().length);
assert.eq("_id_", cursor.toArray()[0].name);
assert.eq(bsonWoCompare({"_id": 1}, cursor.toArray()[0].key), 0);

// Ensure passing a UUID to count retrieves results from the correct collection.
cmd = {
    count: uuid
};
res = db.runCommand(cmd);
assert.commandWorked(res, 'could not run ' + tojson(cmd));
assert.eq(res.n, 1, "expected to count a single document with command: " + tojson(cmd));

// Test that UUID resolution fails when the UUID belongs to a different database. First, we
// create a collection in another database.
const dbWithUUID = db.getSiblingDB(kOtherDbName);
dbWithUUID.getCollection(mainCollName).drop();
assert.commandWorked(dbWithUUID.runCommand({create: mainCollName}));
collectionInfos = dbWithUUID.getCollectionInfos({name: mainCollName});
uuid = collectionInfos[0].info.uuid;
assert.neq(null, uuid);
assert.commandWorked(dbWithUUID.runCommand({find: uuid}));

// Run read commands supporting UUIDs against the original database, passing the UUID from a
// different database, and verify that the UUID resolution fails with the correct error code. We
// also test that the same command succeeds when there is no database mismatch.
for (cmd of [{count: uuid}, {distinct: uuid, key: "a"}, {find: uuid}, {listIndexes: uuid}]) {
    assert.commandWorked(dbWithUUID.runCommand(cmd));
    assert.commandFailedWithCode(
        db.runCommand(cmd), ErrorCodes.NamespaceNotFound, "command: " + tojson(cmd));
}
}());