// This tests that:
// * stale members get into state 3 (recovering)
// * they stay in state 3 after restarting
// * they can recover and go into state 2 if someone less up-to-date becomes primary
//
// This test requires persistence in order for a restarted node with a stale oplog to stay in the
// RECOVERING state. A restarted node with an ephemeral storage engine will not have an oplog upon
// restart, so will immediately resync.
// @tags: [requires_persistence]

/**
 * 1: initial insert
 * 2: initial sync
 * 3: blind s2
 * 4: overflow oplog
 * 5: unblind s2
 * 6: check s2.state == 3
 * 7: restart s2
 * 8: check s2.state == 3
 */


var w = 0;
var wait = function(f) {
    w++;
    var n = 0;
    while (!f()) {
        if( n % 4 == 0 )
            print("toostale.js waiting " + w);
        if (++n == 4) {
            print("" + f);
        }
        assert(n < 200, 'tried 200 times, giving up');
        sleep(1000);
    }
};

var reconnect = function(a) {
  wait(function() {
      try {
        a.bar.stats();
        return true;
      } catch(e) {
        print(e);
        return false;
      }
    });
};


var name = "toostale";
var replTest = new ReplSetTest({ name: name, nodes: 3, oplogSize: 5 });
var host = getHostName();

var nodes = replTest.startSet();
replTest.initiate({_id : name, members : [
    {_id : 0, host : host+":"+replTest.ports[0], priority: 2},
    {_id : 1, host : host+":"+replTest.ports[1], arbiterOnly : true},
    {_id : 2, host : host+":"+replTest.ports[2], priority: 0}
]});
var master = replTest.getPrimary();
var mdb = master.getDB("foo");


print("1: initial insert");
mdb.foo.save({a: 1000});


print("2: initial sync");
replTest.awaitReplication();

print("3: stop s2");
replTest.stop(2);
print("waiting until the master knows the slave is blind");
assert.soon(function() { return master.getDB("admin").runCommand({replSetGetStatus:1}).members[2].health == 0; });
print("okay");

print("4: overflow oplog");
reconnect(master.getDB("local"));
var count = master.getDB("local").oplog.rs.count();
var prevCount = -1;
while (count > prevCount) {
  print("inserting 1000");
  var bulk = mdb.bar.initializeUnorderedBulkOp();
  for (var i = 0; i < 1000; i++) {
    bulk.insert({ x: i, date: new Date(), str: "safkaldmfaksndfkjansfdjanfjkafa" });
  }
  assert.writeOK(bulk.execute());

  prevCount = count;
  replTest.awaitReplication();
  count = master.getDB("local").oplog.rs.count();
  print("count: "+count+" prev: "+prevCount);
}


print("5: restart s2");
replTest.restart(2);
print("waiting until the master knows the slave is not blind");
assert.soon(function() { return master.getDB("admin").runCommand({replSetGetStatus:1}).members[2].health != 0; });
print("okay");


print("6: check s2.state == 3");
var goStale = function() {
  wait(function() {
      var status = master.getDB("admin").runCommand({replSetGetStatus:1});
      printjson(status);
      return status.members[2].state == 3;
    });
};
goStale();


print("7: restart s2");
replTest.stop(2);
replTest.restart(2);


print("8: check s2.state == 3");
assert.soon(function() {
    var status = master.getDB("admin").runCommand({replSetGetStatus:1});
    printjson(status);
    return status.members && status.members[2].state == 3;
});

replTest.stop(0);