//
// Ensures that mongod respects the batch write protocols for updates
//

var coll = db.getCollection( "batch_write_update" );
coll.drop();

assert(coll.getDB().getMongo().useWriteCommands(), "test is not running with write commands")

var request;
var result;
var batch;

var maxWriteBatchSize = 1000;

function resultOK( result ) {
    return result.ok &&
           !( 'code' in result ) &&
           !( 'errmsg' in result ) &&
           !( 'errInfo' in result ) &&
           !( 'writeErrors' in result );
};

function resultNOK( result ) {
    return !result.ok &&
           typeof( result.code ) == 'number' &&
           typeof( result.errmsg ) == 'string';
};

// EACH TEST BELOW SHOULD BE SELF-CONTAINED, FOR EASIER DEBUGGING

//
// NO DOCS, illegal command
coll.remove({});
request = { update: coll.getName() };
result = coll.runCommand(request);
assert(resultNOK(result), tojson(result));

//
// Single document upsert, no write concern specified
coll.remove({});
request = { update: coll.getName(),
            updates: [{ q: { a: 1 }, u: { $set: { a: 1 }}, upsert: true }]};
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(1, result.n);
assert( 'upserted' in result );
assert.eq(1, result.upserted.length);
assert.eq(0, result.upserted[0].index);

// Count the upserted doc
var upsertedId = result.upserted[0]._id;
assert.eq(1, coll.count({_id: upsertedId}));
assert.eq(0, result.nModified, "missing/wrong nModified")

//
// Single document upsert, write concern specified, no ordered specified
coll.remove({});
request = { update: coll.getName(),
            updates: [{ q: { a: 1 }, u: { $set: { a: 1 }}, upsert: true }],
                      writeConcern: { w: 1 }};
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(1, result.n);
assert( 'upserted' in result );
assert.eq(1, result.upserted.length);
assert.eq(0, result.upserted[0].index);

// Count the upserted doc
upsertedId = result.upserted[0]._id;
assert.eq(1, coll.count({_id: upsertedId}));
assert.eq(0, result.nModified, "missing/wrong nModified")

//
// Single document upsert, write concern specified, ordered = true
coll.remove({});
request = { update: coll.getName(),
            updates: [{ q: { a: 1 }, u: { $set: { a: 1 }}, upsert: true }],
            writeConcern: { w: 1 },
            ordered: true };
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(1, result.n);
assert( 'upserted' in result );
assert.eq(1, result.upserted.length);
assert.eq(0, result.upserted[0].index);

// Count the upserted doc
upsertedId = result.upserted[0]._id;
assert.eq(1, coll.count({_id: upsertedId}));
assert.eq(0, result.nModified, "missing/wrong nModified")

//
// Single document upsert, write concern 0 specified, ordered = true
coll.remove({});
request = { update: coll.getName(),
            updates: [{ q: { a: 1 }, u: { $set: { a: 1 }}, upsert: true }],
            writeConcern: { w: 0 },
            ordered: true };
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(1, coll.count({ }));

for (var field in result) {
    assert.eq('ok', field, 'unexpected field found in result: ' + field);
}

//
// Two document upsert, write concern 0 specified, ordered = true
coll.remove({});
request = { update: coll.getName(),
            updates: [{ q: { a: 2 }, u: { $set: { a: 1 }}, upsert: true },
                      { q: { a: 2 }, u: { $set: { a: 2 }}, upsert: true }],
            writeConcern: { w: 0 },
            ordered: true };
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(2, coll.count());

for (var field in result) {
    assert.eq('ok', field, 'unexpected field found in result: ' + field);
}

//
// Single document update
coll.remove({});
coll.insert({a:1});
request = { update: coll.getName(),
            updates: [{ q: { a: 1 }, u: { $set: { c: 1 }}}],
            writeConcern: { w: 1 }};
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(1, result.n);
assert(!('upserted' in result));
assert.eq(1, coll.count());
assert.eq(1, result.nModified, "missing/wrong nModified");

//
// Multi document update/upsert
coll.remove({});
coll.insert({b:1});
request = { update: coll.getName(),
            updates: [{ q: { b: 1 }, u: { $set: { b: 1, a: 1 }}, upsert: true },
                      { q: { b: 2 }, u: { $set: { b: 2, a: 1 }}, upsert: true }],
            writeConcern: { w: 1 },
            ordered: false };
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(2, result.n);
assert.eq(1, result.nModified, "missing/wrong nModified");

assert.eq(1, result.upserted.length);
assert.eq(1, result.upserted[0].index);
assert.eq(1, coll.count({_id: result.upserted[0]._id}));
assert.eq(2, coll.count());

//
// Multiple document update
coll.remove({});
coll.insert({a:1});
coll.insert({a:1});
request = { update: coll.getName(),
            updates: [{ q: { a: 1 }, u: { $set: { c: 2 }}, multi: true }],
            writeConcern: { w: 1 },
            ordered: false };
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(2, result.n);
assert.eq(2, result.nModified, "missing/wrong nModified");
assert.eq(2, coll.find({a:1, c:2}).count());
assert.eq(2, coll.count());

//
//Multiple document update, some no-ops
coll.remove({});
coll.insert({a:1, c:2});
coll.insert({a:1});
request = { update: coll.getName(),
            updates: [{ q: { a: 1 }, u: { $set: { c: 2 }}, multi: true }],
            writeConcern: { w: 1 },
            ordered: false };
printjson( result = coll.runCommand(request) );
assert(resultOK(result), tojson(result));
assert.eq(2, result.n);
assert.eq(1, result.nModified, "missing/wrong nModified");
assert.eq(2, coll.find({a:1, c:2}).count());
assert.eq(2, coll.count());

//
// Large batch under the size threshold should update successfully
coll.remove({});
coll.insert({a:0});
batch = [];
for (var i = 0; i < maxWriteBatchSize; ++i) {
    batch.push({q:{}, u: {$inc: {a:1}}});
}
request = { update: coll.getName(),
            updates: batch,
            writeConcern: { w: 1 },
            ordered: false };
result = coll.runCommand(request);
assert(resultOK(result), tojson(result));
assert.eq(batch.length, result.n);
assert.eq(batch.length, result.nModified, "missing/wrong nModified");
assert.eq(1, coll.find({a:batch.length}).count());
assert.eq(1, coll.count());

//
// Large batch above the size threshold should fail to update
coll.remove({});
coll.insert({a:0});
batch = [];
for (var i = 0; i < maxWriteBatchSize + 1; ++i) {
    batch.push({q:{}, u: {$inc: {a:1}}});
}
request = { update: coll.getName(),
            updates: batch,
            writeConcern: { w: 1 },
            ordered: false };
result = coll.runCommand(request);
assert(resultNOK(result), tojson(result));
assert.eq(1, coll.find({a:0}).count());
assert.eq(1, coll.count());


//
//
// Unique index tests
coll.remove({});
coll.ensureIndex({a : 1}, {unique : true});

//
// Upsert fail due to duplicate key index, w:0, ordered:true
coll.remove({});
request = { update: coll.getName(),
            updates: [{ q: { b: 1 }, u: { $set: { b: 1, a: 1 }}, upsert: true },
                      { q: { b: 2 }, u: { $set: { b: 2, a: 1 }}, upsert: true }],
            writeConcern: { w: 0 },
            ordered: true };
result = coll.runCommand(request);
assert(result.ok, tojson(result));
assert.eq(1, coll.count());

for (var field in result) {
    assert.eq('ok', field, 'unexpected field found in result: ' + field);
}

//
// Upsert fail due to duplicate key index, w:1, ordered:true
coll.remove({});
request = { update: coll.getName(),
            updates: [{ q: { b: 1 }, u: { $set: { b: 1, a: 1 }}, upsert: true },
                      { q: { b: 3 }, u: { $set: { b: 3, a: 2 }}, upsert: true },
                      { q: { b: 2 }, u: { $set: { b: 2, a: 1 }}, upsert: true }],
            writeConcern: { w: 1 },
            ordered: true };
result = coll.runCommand(request);
assert(result.ok, tojson(result));
assert.eq(2, result.n);
assert.eq(0, result.nModified, "wrong nModified");
assert.eq(1, result.writeErrors.length);

assert.eq(2, result.writeErrors[0].index);
assert.eq('number', typeof result.writeErrors[0].code);
assert.eq('string', typeof result.writeErrors[0].errmsg);

assert.eq(2, result.upserted.length);
assert.eq(0, result.upserted[0].index);
assert.eq(1, coll.count({_id: result.upserted[0]._id}));

assert.eq(1, result.upserted[1].index);
assert.eq(1, coll.count({_id: result.upserted[1]._id}));

//
// Upsert fail due to duplicate key index, w:1, ordered:false
coll.remove({});
request = { update: coll.getName(),
            updates: [{ q: { b: 1 }, u: { $set: { b: 1, a: 1 }}, upsert: true },
                      { q: { b: 2 }, u: { $set: { b: 2, a: 1 }}, upsert: true },
                      { q: { b: 2 }, u: { $set: { b: 2, a: 1 }}, upsert: true },
                      { q: { b: 3 }, u: { $set: { b: 3, a: 3 }}, upsert: true }],
            writeConcern: { w: 1 },
            ordered: false };
result = coll.runCommand(request);
assert(result.ok, tojson(result));
assert.eq(2, result.n);
assert.eq(0, result.nModified, "wrong nModified");
assert.eq(2, result.writeErrors.length);

assert.eq(1, result.writeErrors[0].index);
assert.eq('number', typeof result.writeErrors[0].code);
assert.eq('string', typeof result.writeErrors[0].errmsg);

assert.eq(2, result.writeErrors[1].index);
assert.eq('number', typeof result.writeErrors[1].code);
assert.eq('string', typeof result.writeErrors[1].errmsg);

assert.eq(2, result.upserted.length);
assert.eq(0, result.upserted[0].index);
assert.eq(1, coll.count({_id: result.upserted[0]._id}));

assert.eq(3, result.upserted[1].index);
assert.eq(1, coll.count({_id: result.upserted[1]._id}));