const mongoose = require('mongoose');
mongoose.Promise = global.Promise;

const schema = new mongoose.Schema({
  requiredAttribute: {
    type: String,
    required: true
  },
  optionalAttribute: {
    type: String,
    required: false
  }
});

schema.pre('remove', function(done) {
  console.log('pre Remove 1!')
  done();
})

schema.post('remove', function() {
  console.log('post Remove 1!')
})

schema.pre('findOneAndRemove', function(done, doc) {
  console.log('pre Remove 2!')
  done();
})

schema.post('findOneAndRemove', function(doc) {
  console.log('post Remove 2!')
})


const DummyModel =  mongoose.model('DummyModel', schema, 'dummyModels');

mongoose.connect('mongodb://localhost:27017/users-service-test', { useMongoClient: true })
  .then(() => {
    const model = new DummyModel({ requiredAttribute: 'something' })
    return model.save();
  })
  .then((result) => {
    console.log('Using instance.remove, should call the Docucment Middlewares')
    return result.remove();
  })
  .then((result) => {
    return DummyModel.find({})
  })
  .then((result) => {
    console.log('Existing models', result);

    const model = new DummyModel({ requiredAttribute: 'something' })
    return model.save();
  })
  .then((result) => {
    console.log('Using class.remove, should call the Query Middlewares ???')
    DummyModel.remove({ _id: result.id }).exec();
  })
  .then(() => {
    return DummyModel.find({})
  })
  .then((result) => {
    console.log('Existing models', result);
    const model = new DummyModel({ requiredAttribute: 'something' })
    return model.save();
  })
  .then((result) => {
    console.log('Using class.findOneAndRemove, should call the Query Middlewares')
    return DummyModel.findOneAndRemove({ _id: result.id }).exec();
  })
  .then(() => {
    return DummyModel.find({})
  })
  .then((result) => {
    console.log('Existing models', result);
    console.log('... That didn\'t go well ...')
  })