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// I am putting together an app to log phone calls
// the significant (portion) my docs look like
[
  {_id: …, _rev: …, answered: "maurice", callfor: "roy", type: "call"},
  {_id: …, _rev: …, answered: "maurice", callfor: "jen", type: "call"},
  {_id: …, _rev: …, answered: "roy", callfor: "jen", type: "call"}
]

// for each call I am emitting two items: one each for the call answered and the call’s intended recipient.
// map
function(doc) {
  if(doc.type == 'call')
  {
    emit(doc.callfor, {'callfor':1,'answered':0});
    emit(doc.answered, {'callfor':0,'answered':1});
  }
}

// Which outputs something like
[
  "maurice": {callfor:0, answered: 1},
  "maurice": {callfor:0, answered: 1},
  "roy": {callfor:1, answered: 0},
  "roy": {callfor:0, answered: 1},
  "jen": {callfor:1, answered: 0},
  "jen": {callfor:1, answered: 0}
]

// I want a tally of calls answered and calls for with the recipient as the key
// reduce
function(keys, values) {
  var totalcallsfor = 0;
  var totalanswered = 0;
  for (var call in values)
  {
    totalcallsfor = totalcallsfor + call.callfor;
    totalanswered = totalanswered + call.answered;
  }
  return {'callfor': totalcallsfor, 'answered':totalanswered};
}

// Outputs something like
[
  "maurice": {callfor: null, answered: null},
  "roy": {callfor: null, answered: null},
  "jen": {callfor: null, answered: null}
]

// Where I expected (hoped)
[
  "maurice": {callfor: 0, answered: 2},
  "roy": {callfor: 1, answered: 1},
  "jen": {callfor: 2, answered: 0}
]

// What am I doing wrong in my reduce function?