// Test that opcounters get incremented properly.
// Write command version also available at jstests/core.

// Remember the global 'db' var
var lastDB = db;
var mongo = new Mongo(db.getMongo().host);
mongo.writeMode = function() { return "legacy"; }
db = mongo.getDB(db.toString());

var t = db.opcounters;
var isMongos = ("isdbgrid" == db.runCommand("ismaster").msg);
var opCounters;

//
// 1. Insert.
//
// - mongod, single insert:
//     counted as 1 op if successful, else 0
// - mongod, bulk insert of N with continueOnError=true:
//     counted as N ops, regardless of errors
// - mongod, bulk insert of N with continueOnError=false:
//     counted as K ops, where K is number of docs successfully inserted
//
// - mongos
//     count ops attempted like insert commands
//

t.drop();

// Single insert, no error.
opCounters = db.serverStatus().opcounters;
t.insert({_id:0});
assert(!db.getLastError());
assert.eq(opCounters.insert + 1, db.serverStatus().opcounters.insert);

// Bulk insert, no error.
opCounters = db.serverStatus().opcounters;
t.insert([{_id:1},{_id:2}])
assert(!db.getLastError());
assert.eq(opCounters.insert + 2, db.serverStatus().opcounters.insert);

// Single insert, with error.
opCounters = db.serverStatus().opcounters;
t.insert({_id:0})
print( db.getLastError() )
assert(db.getLastError());
assert.eq(opCounters.insert + (isMongos ? 1 : 0), db.serverStatus().opcounters.insert);

// Bulk insert, with error, continueOnError=false.
opCounters = db.serverStatus().opcounters;
t.insert([{_id:3},{_id:3},{_id:4}])
assert(db.getLastError());
assert.eq(opCounters.insert + (isMongos ? 2 : 1), db.serverStatus().opcounters.insert);

// Bulk insert, with error, continueOnError=true.
var continueOnErrorFlag = 1;
opCounters = db.serverStatus().opcounters;
t.insert([{_id:5},{_id:5},{_id:6}], continueOnErrorFlag)
assert(db.getLastError());
assert.eq(opCounters.insert + 3, db.serverStatus().opcounters.insert);

//
// 2. Update.
//
// - counted as 1 op, regardless of errors
//

t.drop();
t.insert({_id:0});

// Update, no error.
opCounters = db.serverStatus().opcounters;
t.update({_id:0}, {$set:{a:1}});
assert(!db.getLastError());
assert.eq(opCounters.update + 1, db.serverStatus().opcounters.update);

// Update, with error.
opCounters = db.serverStatus().opcounters;
t.update({_id:0}, {$set:{_id:1}});
assert(db.getLastError());
assert.eq(opCounters.update + 1, db.serverStatus().opcounters.update);

//
// 3. Delete.
//
// - counted as 1 op, regardless of errors
//

t.drop();
t.insert([{_id:0},{_id:1}]);

// Delete, no error.
opCounters = db.serverStatus().opcounters;
t.remove({_id:0});
assert(!db.getLastError());
assert.eq(opCounters.delete + 1, db.serverStatus().opcounters.delete);

// Delete, with error.
opCounters = db.serverStatus().opcounters;
t.remove({_id:{$invalidOp:1}});
assert(db.getLastError());
assert.eq(opCounters.delete + 1, db.serverStatus().opcounters.delete);

//
// 4. Query.
//
// - mongod: counted as 1 op, regardless of errors
// - mongos: counted as 1 op if successful, else 0
//

t.drop();
t.insert({_id:0});

// Query, no error.
opCounters = db.serverStatus().opcounters;
t.findOne();
assert.eq(opCounters.query + 1, db.serverStatus().opcounters.query);

// Query, with error.
opCounters = db.serverStatus().opcounters;
assert.throws(function() { t.findOne({_id:{$invalidOp:1}}) });
assert.eq(opCounters.query + (isMongos ? 0 : 1), db.serverStatus().opcounters.query);

//
// 5. Getmore.
//
// - counted as 1 op per getmore issued, regardless of errors
//

t.drop();
t.insert([{_id:0},{_id:1},{_id:2}]);

// Getmore, no error.
opCounters = db.serverStatus().opcounters;
t.find().batchSize(2).toArray(); // 3 documents, batchSize=2 => 1 query + 1 getmore
assert.eq(opCounters.query + 1, db.serverStatus().opcounters.query);
assert.eq(opCounters.getmore + 1, db.serverStatus().opcounters.getmore);

// Getmore, with error (TODO implement when SERVER-5813 is resolved).

//
// 6. Command.
//
// - unrecognized commands not counted
// - recognized commands counted as 1 op, regardless of errors
// - some (recognized) commands can suppress command counting (i.e. aren't counted as commands)
//

t.drop();
t.insert({_id:0})

// Command, recognized, no error.
serverStatus = db.runCommand({serverStatus:1});
opCounters = serverStatus.opcounters
metricsObj = serverStatus.metrics.commands
assert.eq(opCounters.command + 1, db.serverStatus().opcounters.command); // "serverStatus" counted
// Count this and the last run of "serverStatus"
assert.eq( metricsObj.serverStatus.total + 2,   
    db.serverStatus().metrics.commands.serverStatus.total,
    "total ServerStatus command counter did not increment" )
assert.eq( metricsObj.serverStatus.failed,
    db.serverStatus().metrics.commands.serverStatus.failed,
    "failed ServerStatus command counter incremented!" )

// Command, recognized, with error.
serverStatus = db.runCommand({serverStatus:1});
opCounters = serverStatus.opcounters
metricsObj = serverStatus.metrics.commands
var countVal = { "total" : 0, "failed" : 0 };
if (metricsObj.count != null){
    countVal = metricsObj.count
}
res = t.runCommand("count", {query:{$invalidOp:1}});
assert.eq(0, res.ok);
assert.eq(opCounters.command + 2,
          db.serverStatus().opcounters.command); // "serverStatus", "count" counted

assert.eq( countVal.total +1,
    db.serverStatus().metrics.commands.count.total,
    "total count command counter did not incremented" )
assert.eq( countVal.failed + 1,
    db.serverStatus().metrics.commands.count.failed,
    "failed count command counter did not increment" )

// Command, unrecognized.
serverStatus = db.runCommand({serverStatus:1});
opCounters = serverStatus.opcounters
metricsObj = serverStatus.metrics.commands
res = t.runCommand("invalid");
assert.eq(0, res.ok);
assert.eq(opCounters.command + 1, db.serverStatus().opcounters.command); // "serverStatus" counted
assert.eq(null, db.serverStatus().metrics.commands.invalid);
assert.eq(metricsObj['<UNKNOWN>'] +1, db.serverStatus().metrics.commands['<UNKNOWN>']);