require 'rails_helper'

module Expenses
  RSpec.describe TotalQuery do
    describe '#call' do
      let(:response) { described_class.new.call }

      before do
        create_list(:guest, 2, status: :confirmed)
        create_list(:guest, 3, status: :considered)
        create_list(:guest, 4, status: :invited)
        create_list(:guest, 5, status: :tentative)
        create_list(:guest, 6, status: :declined)
      end

      context "when there is no expense" do
        it "returns zero in all values", :aggregate_failures do
          expect(response["fixed"]).to be_zero
          expect(response["fixed_count"]).to be_zero
          expect(response["variable"]).to be_zero
          expect(response["variable_count"]).to be_zero
          expect(response["total"]).to be_zero
          expect(response["total_count"]).to be_zero
          expect(response["max_projected"]).to be_zero
          expect(response["per_person"]).to be_zero
        end
      end

      context "when there are only fixed expenses" do
        before do
          create(:expense, :fixed, amount: 100)
          create(:expense, :fixed, amount: 200)
        end

        it "returns the sum of fixed expenses" do
          expect(response["fixed"]).to eq(300)
          expect(response["fixed_count"]).to eq(2)
          expect(response["variable"]).to be_zero
          expect(response["variable_count"]).to be_zero
          expect(response["total"]).to eq(300)
          expect(response["total_count"]).to eq(2)
          expect(response["max_projected"]).to eq(300)
          expect(response["per_person"]).to eq(150)
        end
      end

      context "when there are only variable expenses" do
        before do
          create(:expense, :per_person, amount: 100)
          create(:expense, :per_person, amount: 200)
        end

        it "returns zero in the values and nonzero in the count", :aggregate_failures do
          expect(response["fixed"]).to be_zero
          expect(response["fixed_count"]).to be_zero
          expect(response["variable"]).to eq(300)
          expect(response["variable_count"]).to eq(2)
          expect(response["total"]).to eq(2*300)
          expect(response["total_count"]).to eq(2)
          expect(response["max_projected"]).to eq(11*300)
        end
      end

      context "when there are both fixed and variable expenses" do
        before do
          create(:expense, :fixed, amount: 100)
          create(:expense, :fixed, amount: 200)
          create(:expense, :per_person, amount: 50)
        end

        it "returns the sum of fixed and variable expenses", :aggregate_failures do
          expect(response["fixed"]).to eq(300)
          expect(response["fixed_count"]).to eq(2)
          expect(response["variable"]).to eq(50)
          expect(response["variable_count"]).to eq(1)
          expect(response["total"]).to eq(100 + 200 + 50 * 2)
          expect(response["total_count"]).to eq(3)
          expect(response["max_projected"]).to eq(100 + 200 + 11*50)
          expect(response["per_person"]).to eq(200)
        end
      end
    end
  end
end