'use strict';

/**
 * methods a collection must implement
 */

var methods = [
    'find'
  , 'findOne'
  , 'update'
  , 'updateMany',
  , 'updateOne'
  , 'replaceOne'
  , 'remove'
  , 'count'
  , 'distinct'
  , 'findAndModify'
  , 'aggregate'
  , 'findStream'
  , 'deleteOne'
  , 'deleteMany'
];

/**
 * Collection base class from which implementations inherit
 */

function Collection () {}

for (var i = 0, len = methods.length; i < len; ++i) {
  var method = methods[i];
  Collection.prototype[method] = notImplemented(method);
}

module.exports = exports = Collection;
Collection.methods = methods;

/**
 * creates a function which throws an implementation error
 */

function notImplemented (method) {
  return function () {
    throw new Error('collection.' + method + ' not implemented');
  }
}