require 'rails_helper'

RSpec.describe Org::CreateJoinedUserService do
  let(:org) do
    FactoryBot.create(:org, created_at: DateTime.new(2018,04,01))
  end
  before(:each) do
    FactoryBot.create(:user, org: org, created_at: DateTime.new(2018,04,03,0,0,0))
    FactoryBot.create(:user, org: org, created_at: DateTime.new(2018,04,04,0,0,0))
    FactoryBot.create(:user, org: org, created_at: DateTime.new(2018,05,03,0,0,0))
    FactoryBot.create(:user, org: org, created_at: DateTime.new(2018,06,03,0,0,0))
    FactoryBot.create(:user, org: org, created_at: DateTime.new(2018,06,04,0,0,0))
  end

  def find_by_dates(dates: , org_id:)
    dates.map do |date|
      StatJoinedUser.find_by(date: date, org_id: org_id)
    end
  end
  describe '.call' do
    context 'when an org is passed' do
      it "generates monthly aggregates since org's creation" do
        described_class.call(org)

        april, may, june, july = find_by_dates(dates: ['2018-04-30', '2018-05-31', '2018-06-30', '2018-07-31'], org_id: org.id)
        counts = [april, may, june, july].map(&:count)
        expect(counts).to eq([2,1,2,0])
      end

      it 'monthly records are either created or updated' do
        described_class.call(org)

        april_updated = FactoryBot.create(:user, org: org, created_at: DateTime.new(2018,04,05,0,0,0))

        described_class.call(org)

        stat_joined_user = StatJoinedUser.where(date: '2018-04-30', org_id: org.id)
        expect(stat_joined_user).to have(1).items
        expect(stat_joined_user.first.count).to eq(3)
      end
    end

    context 'when no org is passed' do
      it "generates monthly aggregates for each org since their creation" do
        Org.stubs(:all).returns([org])

        described_class.call

        april, may, june, july = find_by_dates(dates: ['2018-04-30', '2018-05-31', '2018-06-30', '2018-07-31'], org_id: org.id)
        counts = [april, may, june, july].map(&:count)
        expect(counts).to eq([2,1,2,0])
      end

      it 'monthly records are either created or updated' do
        Org.stubs(:all).returns([org])

        described_class.call

        april_updated = FactoryBot.create(:user, org: org, created_at: DateTime.new(2018,04,05,0,0,0))

        described_class.call

        stat_joined_user = StatJoinedUser.where(date: '2018-04-30', org_id: org.id)
        expect(stat_joined_user).to have(1).items
        expect(stat_joined_user.first.count).to eq(3)
      end
    end
  end
end