require "rails_helper"

# Subclass of v0::ApiController for testing
module Api
  module V0
    class TestsController < ApiController
      def index; end
    end
  end
end

RSpec.describe "Api::V0::ApiController" do
  let(:path) { "/api/tests" }

  before do
    # Dynamically add a route to our testing V0::ApiController subclass
    Rails.application.routes.draw do
      namespace :api, defaults: { format: "json" } do
        scope module: :v0 do
          resources :tests
        end
      end
    end
  end

  after do
    # Clean up the route we added!
    Rails.application.reload_routes!
  end

  context "when API V1 is requested" do
    context "when request header is v0 and does not include an api key" do
      let(:headers) { { Accept: "application/v0+json" } }

      it "responds with a Warning header with code 299" do
        get path, headers: headers

        expect(response).to have_http_status(:success)
        # rubocop:disable Layout/LineLength
        expect(response.headers["Warning"])
          .to eq("299 - This endpoint is part of the V0 (beta) API. To start using the V1 endpoints add the `Accept` header and set it to `application/vnd.forem.api-v1+json`. Visit https://developers.forem.com/api for more information.")
        # rubocop:enable Layout/LineLength
      end
    end

    context "when request header is v0 and includes an empty api key" do
      let(:headers) { { Accept: "application/v0+json", "api-key": nil } }

      it "responds with a Warning header with code 299" do
        get path, headers: headers

        expect(response).to have_http_status(:success)
        # rubocop:disable Layout/LineLength
        expect(response.headers["Warning"])
          .to eq("299 - This endpoint is part of the V0 (beta) API. To start using the V1 endpoints add the `Accept` header and set it to `application/vnd.forem.api-v1+json`. Visit https://developers.forem.com/api for more information.")
        # rubocop:enable Layout/LineLength
      end
    end

    context "when request header is v0 and includes an api key" do
      let(:headers) { { Accept: "application/v0+json", "api-key": "abc123" } }

      it "responds with a Warning header with code 299" do
        get path, headers: headers

        expect(response).to have_http_status(:success)
        # rubocop:disable Layout/LineLength
        expect(response.headers["Warning"])
          .to eq("299 - This endpoint is part of the V0 (beta) API. To start using the V1 endpoints add the `Accept` header and set it to `application/vnd.forem.api-v1+json`. Visit https://developers.forem.com/api for more information.")
        # rubocop:enable Layout/LineLength
      end
    end

    context "when request header is missing" do
      let(:headers) { {} }

      it "responds with a Success code and no warning header" do
        get path, headers: headers

        expect(response).to have_http_status(:success)
        # rubocop:disable Layout/LineLength
        expect(response.headers["Warning"])
          .to eq("299 - This endpoint is part of the V0 (beta) API. To start using the V1 endpoints add the `Accept` header and set it to `application/vnd.forem.api-v1+json`. Visit https://developers.forem.com/api for more information.")
        # rubocop:enable Layout/LineLength
      end
    end
  end
end