require 'spec_helper'

describe BrainstemAdaptor::Response do
  let(:plain_text_response) do
    <<-JSON_RESPONSE
    {
      "count": 99,
      "results": [{ "key": "workspaces", "id": "10" }, { "key": "workspaces", "id": "11" }],
      "workspaces": {
        "10": {
          "id": "10",
          "title": "some project",
          "participant_ids": ["2", "6"],
          "primary_counterpart_id": "6"
        },
        "11": {
          "id": "11",
          "title": "another project",
          "participant_ids": ["2", "8"],
          "primary_counterpart_id": "8"
        }
      },
      "users": {
        "2": { "id": "2", "full_name": "bob" },
        "6": { "id": "6", "full_name": "chaz" },
        "8": { "id": "8", "full_name": "jane" }
      }
    }
    JSON_RESPONSE
  end

  let(:response_hash) { BrainstemAdaptor.parser.parse(plain_text_response) }

  let(:specification) do
    {
      'workspaces' => {
        'associations' => {
          'participants' => {
            'foreign_key' => 'participant_ids',
            'collection' => 'users'
          },
          'primary_counterpart' => {
            'foreign_key' => 'primary_counterpart_id',
            'collection' => 'users'
          }
        }
      },
      'users' => nil
    }
  end

  before do
    BrainstemAdaptor.specification = specification
  end

  let(:response_data) { plain_text_response }

  subject(:response) { described_class.new(response_data) }

  describe 'collection' do
    its(:count) { should == 99 }

    specify do
      expect(response.results).to have(2).records
    end

    describe 'records data' do
      specify do
        expect(response.results[0]).to be_a BrainstemAdaptor::Record
      end

      specify do
        expect(response.results[1]).to be_a BrainstemAdaptor::Record
      end

      specify do
        expect(response.results[0].collection_name).to eq('workspaces')
      end

      specify do
        expect(response.results[1].collection_name).to eq('workspaces')
      end

      specify do
        expect(response.results[0]).to eq(response_hash['workspaces']['10'])
      end

      specify do
        expect(response.results[1]).to eq(response_hash['workspaces']['11'])
      end
    end
  end

  describe 'associations' do
    specify do
      expect(response['users']).to eq(response_hash['users'])
    end

    describe '"has many" relations' do
      specify do
        expect(response.results[0]['participants'][0]).to be_a BrainstemAdaptor::Record
      end

      specify do
        expect(response.results[0]['participants'][1]).to be_a BrainstemAdaptor::Record
      end

      specify do
        expect(response.results[1]['participants'][0]).to be_a BrainstemAdaptor::Record
      end

      specify do
        expect(response.results[1]['participants'][1]).to be_a BrainstemAdaptor::Record
      end

      specify do
        expect(response.results[0]['participants']).to eq([response_hash['users']['2'], response_hash['users']['6']])
      end

      specify do
        expect(response.results[1]['participants']).to eq([response_hash['users']['2'], response_hash['users']['8']])
      end
    end

    describe '"has one" relations' do
      specify do
        expect(response.results[0]['primary_counterpart']).to be_a BrainstemAdaptor::Record
      end

      specify do
        expect(response.results[1]['primary_counterpart']).to be_a BrainstemAdaptor::Record
      end
    end
  end

  context 'invalid JSON format' do
    let(:response_data) { 'test; invalid " json ' }

    specify do
      expect { subject }.to raise_error BrainstemAdaptor::InvalidResponseError
    end
  end

  context 'parsed input' do
    let(:response_data) { response_hash }

    specify do
      expect(subject.response_data).to eq(response_data)
    end
  end

  context 'invalid input' do
    let(:response_data) { nil }

    specify do
      expect { subject }.to raise_error ArgumentError, /Expected String/
    end

    context 'count is not returned' do
      let(:response_data) { { 'results' => [] } }

      specify do
        expect { subject }.to raise_error BrainstemAdaptor::InvalidResponseError, /count/
      end
    end

    context 'results collection is not returned' do
      let(:response_data) { { 'count' => 0 } }

      specify do
        expect { subject }.to raise_error BrainstemAdaptor::InvalidResponseError, /results.*returned/
      end
    end

    context 'results collection is not an array' do
      let(:response_data) { { 'count' => 0, 'results' => {} } }

      specify do
        expect { subject }.to raise_error BrainstemAdaptor::InvalidResponseError, /results.*array/
      end
    end
  end

  describe '#to_hash' do
    specify do
      expect(subject.to_hash).to eq(response_hash)
    end
  end

  describe '#==' do
    let(:response_data) { { 'count' => 1, 'results' => [{'key' => 'user', 'value' => 2}] } }

    specify do
      expect(subject).to eq(response_data)
    end
  end
end