require 'spec_helper'

describe OData4::EntitySet, vcr: {cassette_name: 'entity_set_specs'} do
  before(:example) do
    OData4::Service.new('http://services.odata.org/V4/OData/OData.svc', name: 'ODataDemo')
  end

  let(:subject) { OData4::EntitySet.new(options) }
  let(:options) { {
      container: 'DemoService', namespace: 'ODataDemo', name: 'Products',
      type: 'ODataDemo.Product', service_name: 'ODataDemo'
  } }

  it { expect(subject).to respond_to(:name) }
  it { expect(subject).to respond_to(:type) }
  it { expect(subject).to respond_to(:container) }
  it { expect(subject).to respond_to(:namespace) }
  it { expect(subject).to respond_to(:service_name) }
  it { expect(subject).to respond_to(:new_entity) }
  it { expect(subject).to respond_to(:[]) }
  it { expect(subject).to respond_to(:<<) }

  it { expect(subject.name).to eq('Products') }
  it { expect(subject.container).to eq('DemoService') }
  it { expect(subject.namespace).to eq('ODataDemo') }
  it { expect(subject.service_name).to eq('ODataDemo') }
  it { expect(subject.type).to eq('ODataDemo.Product') }

  describe '#each' do
    it { expect(subject).to respond_to(:each) }
    it { expect(lambda {
      @counter = 0
      subject.each {|entity| @counter += 1}
      @counter
    }.call).to eq(11) }
    it { expect(lambda {
      @entities = []
      subject.each {|entity| @entities << entity}
      @entities
    }.call.shuffle.first).to be_a(OData4::Entity) }
  end

  describe '#first' do
    it { expect(subject).to respond_to(:first) }

    describe 'retrieving a single entity' do
      it { expect(subject.first).to be_a(OData4::Entity) }
      it { expect(subject.first['ID']).to eq(0) }
    end

    describe 'retrieving multiple entities' do
      it { expect(subject.first(5)).to be_a(Array) }
      it { expect(subject.first(5).length).to eq(5) }
      it do
        subject.first(5).each do |entity|
          expect(entity).to be_a(OData4::Entity)
        end
      end
    end
  end

  describe '#count' do
    it { expect(subject).to respond_to(:count) }
    it { expect(subject.count).to eq(11) }
  end

  describe '#query' do
    it { expect(subject).to respond_to(:query) }
    it { expect(subject.query).to be_a(OData4::Query) }
  end

  describe '#new_entity' do
    let(:new_entity) { subject.new_entity(properties) }
    let(:release_date) { DateTime.new(2014,7,5) }
    let(:properties) { {
        Name:             'Widget',
        Description:      'Just a simple widget',
        ReleaseDate:      release_date,
        DiscontinuedDate: nil,
        Rating:           4,
        Price:            3.5
    } }

    it { expect(new_entity.entity_set).to eq(subject) }
    it { expect(new_entity['ID']).to be_nil }
    it { expect(new_entity['Name']).to eq('Widget') }
    it { expect(new_entity['Description']).to eq('Just a simple widget') }
    it { expect(new_entity['ReleaseDate']).to eq(release_date) }
    it { expect(new_entity['DiscontinuedDate']).to be_nil }
    it { expect(new_entity['Rating']).to eq(4) }
    it { expect(new_entity['Price']).to eq(3.5) }
  end

  describe '#[]' do
    let(:existing_entity) { subject[0] }
    let(:nonexistant_entity) { subject[99] }

    it 'finds an entity by its primary key' do
      expect(existing_entity).to be_a(OData4::Entity)
      expect(existing_entity['ID']).to eq(0)
    end

    it 'raises an error when no entity was found' do
      expect { nonexistant_entity }.to raise_error(OData4::Errors::NotFound)
    end

    describe 'eager loading' do
      it 'works with a single property' do
        product_with_categories = subject[1, expand: 'Categories']

        expect(product_with_categories['Categories']).to eq([
          { "ID" => 0, "Name" => "Food" },
          { "ID" => 1, "Name" => "Beverages" }
        ])
      end

      it 'works with multiple properties' do
        product_with_details = subject[1, expand: %w[Categories Supplier]]

        expect(product_with_details['Supplier']).to include('Name' => 'Exotic Liquids')
        expect(product_with_details['Categories']).to be_a(Array)
      end

      it 'works with special shortcut for all properties' do
        product_with_all_details = subject[1, expand: :all]

        expect(product_with_all_details['Supplier']).to include('Name' => 'Exotic Liquids')
        expect(product_with_all_details['Categories']).to be_a(Array)
        expect(product_with_all_details['ProductDetail']).to include('Details' => 'Details of product 1')
      end
    end
  end

  describe '#<<' do
    let(:new_entity) { subject.new_entity(properties) }
    let(:bad_entity) { subject.new_entity }
    let(:existing_entity) { subject.first }
    let(:properties) { {
        Name:             'Widget',
        Description:      'Just a simple widget',
        ReleaseDate:      DateTime.now.new_offset(0),
        DiscontinuedDate: nil,
        Rating:           4,
        Price:            3.5
    } }

    xdescribe 'with an existing entity', vcr: {cassette_name: 'entity_set_specs/existing_entry'} do
      before(:each) do
        subject << existing_entity
      end

      it { expect(existing_entity.any_errors?).to eq(false) }
    end

    xdescribe 'with a new entity', vcr: {cassette_name: 'entity_set_specs/new_entry'} do
      it do
        expect(new_entity['ID']).to be_nil
        expect {subject << new_entity}.to_not raise_error
        expect(new_entity['ID']).to_not be_nil
        expect(new_entity['ID']).to eq(9999)
      end
    end

    xdescribe 'with a bad entity', vcr: {cassette_name: 'entity_set_specs/bad_entry'} do
      it { expect{subject << bad_entity}.to raise_error }
    end
  end
end