require 'spec_helper'

describe Spree::Api::ShipmentsController, type: :controller do
  render_views

  let!(:shipment) { create(:shipment) }
  let!(:attributes) { [:id, :tracking, :number, :cost, :shipped_at, :stock_location_name, :order_id, :shipping_rates, :shipping_method, :inventory_units] }

  before do
    allow(controller).to receive(:spree_current_user) { current_api_user }
  end

  context "as an admin" do
    let!(:order) { shipment.order }
    let(:order_ship_address) { create(:address) }
    let!(:stock_location) { create(:stock_location_with_items) }
    let!(:variant) { create(:variant) }
    let(:params) do
      { quantity: 2,
        variant_id: variant.to_param,
        order_id: order.number,
        stock_location_id: stock_location.to_param,
        format: :json }
    end
    let(:error_message) { "broken shipments creation" }

    before do
      order.update_attribute :ship_address_id, order_ship_address.id
      order.update_attribute :distributor, variant.product.supplier
      shipment.shipping_method.distributors << variant.product.supplier
    end

    sign_in_as_admin!

    context '#create' do
      it 'creates a shipment if order does not have a shipment' do
        order.shipment.destroy
        order.reload

        spree_post :create, params

        expect_valid_response
        expect(json_response["inventory_units"].size).to eq 2
        expect(order.reload.line_items.first.variant.price).to eq(variant.price)
      end

      it 'updates and returns exiting shipment, if order already has a shipment' do
        original_shipment_id = order.shipment.id

        spree_post :create, params

        expect(json_response["id"]). to eq(original_shipment_id)
        expect_valid_response
        expect(json_response["inventory_units"].size).to eq 2
        expect(order.reload.line_items.first.variant.price).to eq(variant.price)
      end

      it 'updates existing shipment with variant override if an VO is sent' do
        hub = create(:distributor_enterprise)
        order.update_attribute(:distributor, hub)
        shipment.shipping_method.distributors << hub
        variant_override = create(:variant_override, hub: hub, variant: variant)

        spree_post :create, params

        expect_valid_response
        expect(json_response["inventory_units"].size).to eq 2
        expect(order.reload.line_items.first.price).to eq(variant_override.price)
      end

      it 'returns error code when adding to order contents fails' do
        make_order_contents_fail

        spree_post :create, params

        expect_error_response
      end
    end

    context 'for a completed order with shipment' do
      let(:order) { create :completed_order_with_totals }

      before { params[:id] = order.shipments.first.to_param }

      context '#add' do
        it 'adds a variant to the shipment' do
          spree_put :add, params

          expect_valid_response
          expect(inventory_units_for(json_response["inventory_units"], variant).size).to eq 2
        end

        it 'returns error code when adding to order contents fails' do
          make_order_contents_fail

          spree_put :add, params

          expect_error_response
        end

        it 'adds a variant override to the shipment' do
          hub = create(:distributor_enterprise)
          order.update_attribute(:distributor, hub)
          variant_override = create(:variant_override, hub: hub, variant: variant)

          spree_put :add, params

          expect_valid_response
          expect(inventory_units_for(json_response["inventory_units"], variant).size).to eq 2
          expect(order.reload.line_items.last.price).to eq(variant_override.price)
        end
      end

      context '#remove' do
        before do
          params[:variant_id] = order.line_items.first.variant.to_param
          params[:quantity] = 1
        end

        it 'removes a variant from the shipment' do
          spree_put :remove, params

          expect_valid_response
          expect(inventory_units_for(json_response["inventory_units"], variant).size).to eq 0
        end

        it 'returns error code when removing from order contents fails' do
          make_order_contents_fail

          spree_put :remove, params

          expect_error_response
        end
      end
    end

    def inventory_units_for(inventory_units, variant)
      inventory_units.select { |unit| unit['variant_id'] == variant.id }
    end

    def expect_valid_response
      expect(response.status).to eq 200
      attributes.all?{ |attr| json_response.key? attr.to_s }
      expect(json_response["shipping_method"]["name"]).to eq order.shipping_method.name
    end

    def make_order_contents_fail
      expect(Spree::Order).to receive(:find_by_number!) { order }
      expect(order).to receive(:contents) { raise error_message }
    end

    def expect_error_response
      expect(response.status).to eq 422
      expect(json_response["exception"]).to eq error_message
    end
  end
end