require 'rails_helper'

module Spree
  RSpec.describe StockLocation, type: :model do
    subject { create(:stock_location_with_items, backorderable_default: true) }
    let(:stock_item) { subject.stock_items.order(:id).first }
    let(:variant) { stock_item.variant }

    it 'creates stock_items for all variants' do
      expect(subject.stock_items.count).to eq Variant.count
    end

    context "handling stock items" do
      let!(:variant) { create(:variant) }

      context "given a variant" do
        subject { StockLocation.create(name: "testing", propagate_all_variants: false) }

        context "set up" do
          it "creates stock item" do
            expect(subject).to receive(:propagate_variant)
            subject.set_up_stock_item(variant)
          end

          context "stock item exists" do
            let!(:stock_item) { subject.propagate_variant(variant) }

            it "returns existing stock item" do
              expect(subject.set_up_stock_item(variant)).to eq(stock_item)
            end
          end
        end

        context "propagate variants" do
          let(:stock_item) { subject.propagate_variant(variant) }

          it "creates a new stock item" do
            expect {
              subject.propagate_variant(variant)
            }.to change{ StockItem.count }.by(1)
          end

          context "passes backorderable default config" do
            context "true" do
              before { subject.backorderable_default = true }
              it { expect(stock_item.backorderable).to be true }
            end

            context "false" do
              before { subject.backorderable_default = false }
              it { expect(stock_item.backorderable).to be false }
            end
          end
        end

        context "propagate all variants" do
          subject { StockLocation.new(name: "testing") }

          context "true" do
            before { subject.propagate_all_variants = true }

            specify do
              expect(subject).to receive(:propagate_variant).at_least(:once)
              subject.save!
            end
          end

          context "false" do
            before { subject.propagate_all_variants = false }

            specify do
              expect(subject).not_to receive(:propagate_variant)
              subject.save!
            end
          end
        end
      end
    end

    it 'finds a stock_item for a variant' do
      stock_item = subject.stock_item(variant)
      expect(stock_item.count_on_hand).to eq 10
    end

    it 'finds a stock_item for a variant by id' do
      stock_item = subject.stock_item(variant.id)
      expect(stock_item.variant).to eq variant
    end

    it 'returns nil when stock_item is not found for variant' do
      stock_item = subject.stock_item(0)
      expect(stock_item).to be_nil
    end

    describe '#stock_item_or_create' do
      before do
        variant = create(:variant)
        variant.stock_items.each(&:really_destroy!)
        variant.save
      end

      it 'creates a stock_item if not found for a variant' do
        stock_item = subject.stock_item_or_create(variant)
        expect(stock_item.variant).to eq variant
      end

      it 'creates a stock_item if not found for a variant_id' do
        stock_item = subject.stock_item_or_create(variant.id)
        expect(stock_item.variant).to eq variant
      end
    end

    it 'finds a count_on_hand for a variant' do
       expect(subject.count_on_hand(variant)).to eq 10
    end

    it 'finds determines if you a variant is backorderable' do
      expect(subject.backorderable?(variant)).to be true
    end

    it 'restocks a variant with a positive stock movement' do
      originator = double
      expect(subject).to receive(:move).with(variant, 5, originator)
      subject.restock(variant, 5, originator)
    end

    it 'unstocks a variant with a negative stock movement' do
      originator = double
      expect(subject).to receive(:move).with(variant, -5, originator)
      subject.unstock(variant, 5, originator)
    end

    it 'it creates a stock_movement' do
      expect {
        subject.move variant, 5
      }.to change { subject.stock_movements.where(stock_item_id: stock_item).count }.by(1)
    end

    it 'can be deactivated' do
      create(:stock_location, active: true)
      create(:stock_location, active: false)
      expect(Spree::StockLocation.active.count).to eq 1
    end

    it 'ensures only one stock location is default at a time' do
      first = create(:stock_location, active: true, default: true)
      second = create(:stock_location, active: true, default: true)

      expect(first.reload.default).to eq false
      expect(second.reload.default).to eq true

      first.default = true
      first.save!

      expect(first.reload.default).to eq true
      expect(second.reload.default).to eq false
    end

    context 'fill_status' do
      it 'all on_hand with no backordered' do
        on_hand, backordered = subject.fill_status(variant, 5)
        expect(on_hand).to eq 5
        expect(backordered).to eq 0
      end

      it 'some on_hand with some backordered' do
        on_hand, backordered = subject.fill_status(variant, 20)
        expect(on_hand).to eq 10
        expect(backordered).to eq 10
      end

      it 'zero on_hand with all backordered' do
        stock_item.set_count_on_hand(0)

        on_hand, backordered = subject.fill_status(variant, 20)
        expect(on_hand).to eq 0
        expect(backordered).to eq 20
      end

      context 'when backordering is not allowed' do
        before do
          stock_item.update!(backorderable: false)
        end

        it 'all on_hand' do
          stock_item.set_count_on_hand(10)

          on_hand, backordered = subject.fill_status(variant, 5)
          expect(on_hand).to eq 5
          expect(backordered).to eq 0
        end

        it 'some on_hand' do
          stock_item.set_count_on_hand(10)

          on_hand, backordered = subject.fill_status(variant, 20)
          expect(on_hand).to eq 10
          expect(backordered).to eq 0
        end

        it 'zero on_hand' do
          stock_item.set_count_on_hand(0)

          on_hand, backordered = subject.fill_status(variant, 20)
          expect(on_hand).to eq 0
          expect(backordered).to eq 0
        end
      end

      context 'without stock_items' do
        subject { create(:stock_location) }
        let(:variant) { create(:base_variant) }

        it 'zero on_hand and backordered' do
          subject
          variant.stock_items.each(&:really_destroy!)
          on_hand, backordered = subject.fill_status(variant, 1)
          expect(on_hand).to eq 0
          expect(backordered).to eq 0
        end
      end

      context 'with soft-deleted stock_items' do
        subject { create(:stock_location) }
        let(:variant) { create(:base_variant) }

        it 'zero on_hand and backordered' do
          subject
          variant.stock_items.discard_all
          on_hand, backordered = subject.fill_status(variant, 1)
          expect(on_hand).to eq 0
          expect(backordered).to eq 0
        end
      end
    end

    context '#state_text' do
      context 'state is blank' do
        subject { StockLocation.create(name: "testing", state: nil, state_name: 'virginia') }
        specify { expect(subject.state_text).to eq('virginia') }
      end

      context 'both name and abbr is present' do
        let(:state) { stub_model(Spree::State, name: 'virginia', abbr: 'va') }
        subject { StockLocation.create(name: "testing", state: state, state_name: nil) }
        specify { expect(subject.state_text).to eq('va') }
      end

      context 'only name is present' do
        let(:state) { stub_model(Spree::State, name: 'virginia', abbr: nil) }
        subject { StockLocation.create(name: "testing", state: state, state_name: nil) }
        specify { expect(subject.state_text).to eq('virginia') }
      end
    end

    describe "#move" do
      let!(:variant) { create(:variant) }
      def move
        subject.move(variant, quantity)
      end

      context "no stock item exists" do
        before { subject.stock_items.each(&:really_destroy!) }
        context "positive movement" do
          let(:quantity) { 1 }
          it "creates a stock item" do
            expect { move }.to change { subject.stock_items.count }.by 1
          end
        end

        # We should not be creating stock items that do not exist
        # for the sake of a negative movement.
        context "negative movement" do
          let(:quantity) { -1 }
          it "raises an error" do
            expect {
              expect {
                move
              }.to raise_error StockLocation::InvalidMovementError
            }.not_to change { subject.stock_items.count }
          end
        end
      end
    end
  end
end