require 'spec_helper'

describe LineItemsController, type: :controller do
  let(:user) { create(:user) }
  let(:distributor) { create(:distributor_enterprise) }
  let(:order_cycle) { create(:simple_order_cycle) }

  context "listing bought items" do
    let!(:completed_order) do
      order = create(:completed_order_with_totals, user: user, distributor: distributor, order_cycle: order_cycle, line_items_count: 1)
      while !order.completed? do break unless order.next! end
      order
    end

    before do
      allow(controller).to receive_messages spree_current_user: user
      allow(controller).to receive_messages current_order_cycle: order_cycle
      allow(controller).to receive_messages current_distributor: distributor
    end

    it "lists items bought by the user from the same shop in the same order_cycle" do
      get :bought, format: :json
      expect(response.status).to eq 200
      json_response = JSON.parse(response.body)
      expect(json_response.length).to eq completed_order.line_items(:reload).count
      expect(json_response[0]['id']).to eq completed_order.line_items.first.id
    end
  end

  describe "destroying a line item" do
    context "on a completed order" do
      let(:item) do
        order = create(:completed_order_with_totals)
        item = create(:line_item, order: order)
        while !order.completed? do break unless order.next! end
        item
      end

      let(:order) { item.order }
      let(:order_cycle) { create(:simple_order_cycle, distributors: [distributor], variants: [order.line_item_variants]) }

      before { allow(controller).to receive_messages spree_current_user: item.order.user }

      context "without a line item id" do
        it "fails and raises an error" do
          delete :destroy
          expect(response.status).to eq 404
        end
      end

      context "with a line item id" do
        let(:params) { { format: :json, id: item } }

        context "where the item's order is not associated with the user" do
          it "denies deletion" do
            delete :destroy, params
            expect(response.status).to eq 403
          end
        end

        context "where the item's order is associated with the current user" do
          before { order.update_attributes!(user_id: user.id) }

          context "without an order cycle or distributor" do
            it "denies deletion" do
              delete :destroy, params
              expect(response.status).to eq 403
            end
          end

          context "with an order cycle and distributor" do
            before { order.update_attributes!(order_cycle_id: order_cycle.id, distributor_id: distributor.id) }

            context "where changes are not allowed" do
              it "denies deletion" do
                delete :destroy, params
                expect(response.status).to eq 403
              end
            end

            context "where changes are allowed" do
              before { distributor.update_attributes!(allow_order_changes: true) }

              it "deletes the line item" do
                delete :destroy, params
                expect(response.status).to eq 204
                expect { item.reload }.to raise_error ActiveRecord::RecordNotFound
              end
            end
          end
        end
      end
    end

    context "on a completed order with shipping and payment fees" do
      let(:shipping_fee) { 3 }
      let(:payment_fee) { 5 }
      let(:distributor_with_taxes) { create(:distributor_enterprise_with_tax) }
      let(:order) { create(:completed_order_with_fees, distributor: distributor_with_taxes, shipping_fee: shipping_fee, payment_fee: payment_fee) }

      before do
        Spree::Config.shipment_inc_vat = true
        Spree::Config.shipping_tax_rate = 0.25
      end

      it "updates the fees" do
        # Sanity check fees
        item_num = order.line_items.length
        initial_fees = item_num * (shipping_fee + payment_fee)
        expect(order.adjustment_total).to eq initial_fees
        expect(order.shipments.last.adjustment.included_tax).to eq 1.2

        # Delete the item
        item = order.line_items.first
        allow(controller).to receive_messages spree_current_user: order.user
        request = { format: :json, id: item }
        delete :destroy, request
        expect(response.status).to eq 204

        # Check the fees again
        order.reload
        order.shipment.reload
        expect(order.adjustment_total).to eq initial_fees - shipping_fee - payment_fee
        expect(order.shipments.last.adjustment.amount).to eq shipping_fee
        expect(order.payments.first.adjustment.amount).to eq payment_fee
        expect(order.shipments.last.adjustment.included_tax).to eq 0.6
      end
    end

    context "on a completed order with enterprise fees" do
      let(:user) { create(:user) }
      let(:variant) { create(:variant) }
      let(:distributor) { create(:distributor_enterprise, allow_order_changes: true) }
      let(:order_cycle) { create(:simple_order_cycle, distributors: [distributor]) }
      let(:enterprise_fee) { create(:enterprise_fee, calculator: build(:calculator_per_item) ) }
      let!(:exchange) { create(:exchange, incoming: true, sender: variant.product.supplier, receiver: order_cycle.coordinator, variants: [variant], enterprise_fees: [enterprise_fee]) }
      let!(:order) do
        order = create(:completed_order_with_totals, user: user, distributor: distributor, order_cycle: order_cycle, line_items_count: 1)
        order.reload.line_items.first.update_attributes(variant_id: variant.id)
        while !order.completed? do break unless order.next! end
        order.update_distribution_charge!
        order
      end
      let(:params) { { format: :json, id: order.line_items.first } }

      it "updates the fees" do
        expect(order.reload.adjustment_total).to eq enterprise_fee.calculator.preferred_amount

        allow(controller).to receive_messages spree_current_user: user
        delete :destroy, params
        expect(response.status).to eq 204

        expect(order.reload.adjustment_total).to eq 0
      end
    end
  end
end