RSpec.describe SimpleExporter do
  describe "#define" do
    context "with an incomplete configuration" do
      it "should raise an error" do
        SimpleExporter.define :foo
        expect do
          SimpleExporter.new(configuration_name: :test).export
        end.to raise_error(RuntimeError)
      end
    end
    context "with a complete configuration" do
      before do
        SimpleExporter.define :foo do |config|
          config.collection = Chouette::StopArea.all
        end
      end

      it "should define an exporter" do
        expect{SimpleExporter.find_configuration(:foo)}.to_not raise_error
        expect{SimpleExporter.new(configuration_name: :foo, filepath: "").export}.to_not raise_error
        expect{SimpleExporter.find_configuration(:bar)}.to raise_error(RuntimeError)
        expect{SimpleExporter.new(configuration_name: :bar, filepath: "")}.to raise_error(RuntimeError)
        expect{SimpleExporter.new(configuration_name: :bar, filepath: "").export}.to raise_error(RuntimeError)
        expect{SimpleExporter.create(configuration_name: :foo, filepath: "")}.to change{SimpleExporter.count}.by 1
      end
    end

    context "when defining the same col twice" do
      it "should raise an error" do
        expect do
          SimpleExporter.define :foo do |config|
            config.collection = Chouette::StopArea.all
            config.add_column :name
            config.add_column :name
          end
        end.to raise_error(RuntimeError)
      end
    end
  end

  describe "#export" do
    let(:exporter){ importer = SimpleExporter.new(configuration_name: :test, filepath: filepath) }
    let(:filepath){ Rails.root + "tmp/" + filename }
    let(:filename){ "stop_area.csv" }
    # let(:stop_area_referential){ create(:stop_area_referential, objectid_format: :stif_netex) }

    context "with one row per item" do
      before(:each) do
        @stop_area = create :stop_area
        SimpleExporter.define :test do |config|
          config.collection = ->{ Chouette::StopArea.all }
          config.separator = ";"
          config.add_column :name
          config.add_column :lat, attribute: :latitude
          config.add_column :lng, attribute: [:latitude, :to_i, :next]
          config.add_column :type, attribute: :area_type
          config.add_column :street_name, value: "Lil Exporter"
          config.on_relation :stop_area_referential do
            config.add_column :stop_area_referential_id, attribute: :id
            config.add_column :stop_area_referential_id_other, value: ->(item){ item.id }
          end
          config.add_column :forty_two, value: 42
        end
      end

      it "should export the given file" do
        expect{exporter.export verbose: false}.to_not raise_error
        expect(exporter.status).to eq "success"
        expect(File.exists?(filepath)).to be_truthy
        csv = CSV.read(filepath, headers: true, col_sep: ";")
        row = csv.by_row.values_at(0).last
        expect(row["name"]).to eq @stop_area.name
        expect(row["lat"]).to eq @stop_area.latitude.to_s
        expect(row["lng"]).to eq (@stop_area.latitude.to_i + 1).to_s
        expect(row["street_name"]).to eq "Lil Exporter"
        expect(row["stop_area_referential_id"]).to eq @stop_area.stop_area_referential_id.to_s
        expect(row["stop_area_referential_id_other"]).to eq @stop_area.stop_area_referential_id.to_s
        expect(row["forty_two"]).to eq "42"
      end
    end

    context "with several rows for the same object" do
      before(:each) do
        @stop_area = create :stop_area
        @stop_1 = create :stop_point, stop_area: @stop_area
        @stop_2 = create :stop_point, stop_area: @stop_area
        SimpleExporter.define :test do |config|
          config.collection = ->{ Chouette::StopArea.all }
          config.map_item_to_rows do |stop_area|
            stop_area.stop_points.map do |sp|
              {
                id: sp.id,
                stop_area: stop_area
              }
            end
          end
          config.add_column :id
          config.on_relation :stop_area do
            config.add_column :stop_area_name, attribute: :name
          end
        end
      end

      it "should export the given file" do
        expect{exporter.export verbose: false}.to_not raise_error
        expect(exporter.status).to eq "success"
        expect(File.exists?(filepath)).to be_truthy
        csv = CSV.read(filepath, headers: true)
        row = csv.by_row.values_at(0).last
        expect(row["id"]).to eq @stop_1.id.to_s
        expect(row["stop_area_name"]).to eq @stop_area.name
        row = csv.by_row.values_at(1).last
        expect(row["id"]).to eq @stop_2.id.to_s
        expect(row["stop_area_name"]).to eq @stop_area.name
      end
    end
  end
end