/**
 * Where we test operations dealing with large chunks
 *
 * This test is labeled resource intensive because its total io_write is 220MB compared to a median
 * of 5MB across all sharding tests in wiredTiger.
 * @tags: [resource_intensive]
 */
(function() {
'use strict';

// Starts a new sharding environment limiting the chunk size to 1GB (highest value allowed).
// Note that early splitting will start with a 1/4 of max size currently.
var s = new ShardingTest({name: 'large_chunk', shards: 2, other: {chunkSize: 1024}});
var db = s.getDB("test");

//
// Step 1 - Test moving a large chunk
//

// Turn on sharding on the 'test.foo' collection and generate a large chunk
assert.commandWorked(s.s0.adminCommand({enablesharding: "test"}));
s.ensurePrimaryShard('test', s.shard1.shardName);

var bigString = "";
while (bigString.length < 10000) {
    bigString += "asdasdasdasdadasdasdasdasdasdasdasdasda";
}

var inserted = 0;
var num = 0;
var bulk = db.foo.initializeUnorderedBulkOp();
while (inserted < (400 * 1024 * 1024)) {
    bulk.insert({_id: num++, s: bigString});
    inserted += bigString.length;
}
assert.commandWorked(bulk.execute());

assert.commandWorked(s.s0.adminCommand({shardcollection: "test.foo", key: {_id: 1}}));

assert.eq(1, s.config.chunks.count({"ns": "test.foo"}), "step 1 - need one large chunk");

var primary = s.getPrimaryShard("test").getDB("test");
var secondary = s.getOther(primary).getDB("test");

// Make sure that we don't move that chunk if it goes past what we consider the maximum chunk
// size
print("Checkpoint 1a");
var max = 200 * 1024 * 1024;
assert.throws(function() {
    s.adminCommand({
        movechunk: "test.foo",
        find: {_id: 1},
        to: secondary.getMongo().name,
        maxChunkSizeBytes: max
    });
});

// Move the chunk
print("checkpoint 1b");
var before = s.config.chunks.find({ns: 'test.foo'}).toArray();
assert.commandWorked(
    s.s0.adminCommand({movechunk: "test.foo", find: {_id: 1}, to: secondary.getMongo().name}));

var after = s.config.chunks.find({ns: 'test.foo'}).toArray();
assert.neq(before[0].shard, after[0].shard, "move chunk did not work");

s.config.changelog.find().forEach(printjson);

s.stop();
})();