# frozen_string_literal: true

require 'system_helper'

describe '
 As an administrator
 I want to create an invoice for an order
' do
  include WebHelper
  include AuthenticationHelper

  let(:user) { create(:user) }
  let(:product) { create(:simple_product) }
  let(:distributor) { create(:distributor_enterprise, owner: user, charges_sales_tax: true) }
  let(:order_cycle) do
    create(:simple_order_cycle, name: 'One', distributors: [distributor],
                                variants: [product.variants.first])
  end

  let(:order) do
    create(:order_with_totals_and_distribution,
           distributor:, user:,
           order_cycle:, state: 'complete',
           payment_state: 'balance_due')
  end
  let(:customer) { order.customer }

  before do
    Flipper.enable(:invoices)
    order.finalize!
    login_as_admin
    visit spree.edit_admin_order_path(order)
  end

  context 'when the order has no invoices' do
    it 'creates an invoice for the order' do
      click_link 'Invoices'

      expect {
        click_link 'New Invoice'
        expect(page).to have_no_link "New Invoice"
      }.to change { order.invoices.count }.by(1)

      invoice = order.invoices.first
      expect(invoice.cancelled).to eq false
      expect(invoice.number).to eq 1
    end
  end

  context 'when the order has an invoice' do
    let!(:latest_invoice){ create(:invoice, order:, number: 1, cancelled: false) }

    context 'order not updated since latest invoice' do
      it 'should not render new invoice button' do
        click_link 'Invoices'
        expect(page).to_not have_link 'New Invoice'
      end
    end

    # For reference check:
    # https://docs.google.com/spreadsheets/d/1hOM6UL4mWeRCFLcDQ3fTkbhbUQ2WvIUCCA1IerDBtUA/edit#gid=0
    context 'order updated since latest invoice' do
      context 'changes require regenerating' do
        let(:new_note){ 'new note' }
        before do
          order.update!(note: new_note)
        end

        it 'updates the lastest invoice for the order' do
          click_link 'Invoices'
          expect {
            click_link 'New Invoice'
            expect(page).to have_no_link "New Invoice"
          }.to change { order.reload.invoices.count }.by(0)
            .and change { latest_invoice.reload.presenter.note }.from("").to(new_note)

          expect(latest_invoice.reload.cancelled).to eq false
        end
      end

      context 'changes require generating a new invoice' do
        before do
          order.line_items.first.update!(quantity: 2)
        end

        it 'creates a new invoice for the order' do
          click_link 'Invoices'
          expect {
            click_link 'New Invoice'
            expect(page).to have_no_link "New Invoice"
          }.to change { order.reload.invoices.count }.by(1)

          expect(latest_invoice.reload.cancelled).to eq true
          expect(latest_invoice.presenter.sorted_line_items.first.quantity).to eq 1

          new_invoice = order.invoices.last
          expect(new_invoice.cancelled).to eq false
          expect(new_invoice.number).to eq 2
          expect(new_invoice.presenter.sorted_line_items.first.quantity).to eq 2
        end
      end
    end
  end
end