module GdsApi::TestHelpers::EmailAlertApi

def assert_email_alert_sent(attributes = nil)
  if attributes
    matcher = ->(request) do
      payload = JSON.parse(request.body)
      payload.select { |k, _| attributes.key?(k) } == attributes
    end
  end
  assert_requested(:post, "#{EMAIL_ALERT_API_ENDPOINT}/notifications", times: 1, &matcher)
end

def assert_subscribed(subscribable_id, address, frequency = "immediately")
  assert_requested(:post, "#{EMAIL_ALERT_API_ENDPOINT}/subscriptions") do |req|
    JSON.parse(req.body).symbolize_keys == {
      subscribable_id: subscribable_id,
      address: address,
      frequency: frequency
    }
  end
end

def assert_unsubscribed(uuid)
  assert_requested(:post, "#{EMAIL_ALERT_API_ENDPOINT}/unsubscribe/#{uuid}", times: 1)
end

def build_subscriber_lists_url(attributes = nil)
  if attributes
    tags = attributes["tags"]
    links = attributes["links"]
    document_type = attributes["document_type"]
    email_document_supertype = attributes["email_document_supertype"]
    government_document_supertype = attributes["government_document_supertype"]
    gov_delivery_id = attributes["gov_delivery_id"]
    params = {}
    params[:tags] = tags if tags
    params[:links] = links if links
    params[:document_type] = document_type if document_type
    params[:email_document_supertype] = email_document_supertype if email_document_supertype
    params[:government_document_supertype] = government_document_supertype if government_document_supertype
    params[:gov_delivery_id] = gov_delivery_id if gov_delivery_id
    query = Rack::Utils.build_nested_query(params)
  end
  url = "#{EMAIL_ALERT_API_ENDPOINT}/subscriber-lists"
  query ? "#{url}?#{query}" : url
end

def email_alert_api_accepts_alert
  stub_request(:post, "#{EMAIL_ALERT_API_ENDPOINT}/notifications")
    .to_return(status: 202, body: {}.to_json)
end

def email_alert_api_accepts_unpublishing_message
  stub_request(:post, "#{EMAIL_ALERT_API_ENDPOINT}/unpublish-messages")
    .to_return(status: 202, body: {}.to_json)
end

def email_alert_api_creates_a_subscription(subscribable_id, address, frequency, returned_subscription_id)
  stub_request(:post, "#{EMAIL_ALERT_API_ENDPOINT}/subscriptions")
    .with(
      body: { subscribable_id: subscribable_id, address: address, frequency: frequency }.to_json
  ).to_return(status: 201, body: { subscription_id: returned_subscription_id }.to_json)
end

def email_alert_api_creates_an_auth_token(subscriber_id, address)
  stub_request(:post, "#{EMAIL_ALERT_API_ENDPOINT}/subscribers/auth-token")
    .to_return(
      status: 201,
      body: get_subscriber_response(subscriber_id, address).to_json
    )
end

def email_alert_api_creates_an_existing_subscription(subscribable_id, address, frequency, returned_subscription_id)
  stub_request(:post, "#{EMAIL_ALERT_API_ENDPOINT}/subscriptions")
    .with(
      body: { subscribable_id: subscribable_id, address: address, frequency: frequency }.to_json
  ).to_return(status: 200, body: { subscription_id: returned_subscription_id }.to_json)
end

def email_alert_api_creates_subscriber_list(attributes)
  stub_request(:post, build_subscriber_lists_url)
    .to_return(
      status: 201,
      body: get_subscriber_list_response(attributes).to_json,
    )
end

def email_alert_api_does_not_have_subscribable(reference:)
  stub_request(:get, "#{EMAIL_ALERT_API_ENDPOINT}/subscribables/#{reference}")
    .to_return(status: 404)
end

def email_alert_api_does_not_have_subscriber_list(attributes)
  stub_request(:get, build_subscriber_lists_url(attributes))
    .to_return(status: 404)
end

def email_alert_api_does_not_have_subscriber_subscriptions(id)
  stub_request(:get, "#{EMAIL_ALERT_API_ENDPOINT}/subscribers/#{id}/subscriptions")
    .to_return(status: 404)
end

def email_alert_api_does_not_have_updated_subscriber(id)
  stub_request(:patch, "#{EMAIL_ALERT_API_ENDPOINT}/subscribers/#{id}")
    .to_return(status: 404)
end

def email_alert_api_does_not_have_updated_subscription(subscription_id)
  stub_request(:patch, "#{EMAIL_ALERT_API_ENDPOINT}/subscriptions/#{subscription_id}")
    .to_return(status: 404)
end

def email_alert_api_has_no_subscriber(subscriber_id)
  stub_request(:delete, "#{EMAIL_ALERT_API_ENDPOINT}/subscribers/#{subscriber_id}")
    .to_return(status: 404)
end

def email_alert_api_has_no_subscription_for_uuid(uuid)
  stub_request(:post, "#{EMAIL_ALERT_API_ENDPOINT}/unsubscribe/#{uuid}")
    .with(body: "{}")
    .to_return(status: 404)
end

def email_alert_api_has_notification(notification)
  url = "#{EMAIL_ALERT_API_ENDPOINT}/notifications/#{notification['web_service_bulletin']['to_param']}"
  stub_request(:get, url).to_return(
    status: 200,
    body: notification.to_json
  )
end

def email_alert_api_has_notifications(notifications, start_at = nil)
  url = "#{EMAIL_ALERT_API_ENDPOINT}/notifications"
  url += "?start_at=#{start_at}" if start_at
  url_regexp = Regexp.new("^#{Regexp.escape(url)}$")
  stub_request(:get, url_regexp)
    .to_return(
      status: 200,
      body: notifications.to_json
    )
end

def email_alert_api_has_subscribable(reference:, returned_attributes:)
  stub_request(:get, "#{EMAIL_ALERT_API_ENDPOINT}/subscribables/#{reference}")
    .to_return(
      status: 200,
      body: {
        subscribable: returned_attributes
      }.to_json
  )
end

def email_alert_api_has_subscriber_list(attributes)
  stub_request(:get, build_subscriber_lists_url(attributes))
    .to_return(
      status: 200,
      body: get_subscriber_list_response(attributes).to_json,
    )
end

def email_alert_api_has_subscriber_subscriptions(id, address)
  stub_request(:get, "#{EMAIL_ALERT_API_ENDPOINT}/subscribers/#{id}/subscriptions")
    .to_return(
      status: 200,
      body: get_subscriber_subscriptions_response(id, address).to_json,
    )
end

def email_alert_api_has_subscription(
  id,
  frequency,
  title: "Some title",
  subscriber_id: 1,
  subscriber_list_id: 1000,
  ended: false
)
  stub_request(:get, "#{EMAIL_ALERT_API_ENDPOINT}/subscriptions/#{id}")
    .to_return(
      status: 200,
      body: get_subscription_response(
        id,
        frequency: frequency,
        title: title,
        subscriber_id: subscriber_id,
        subscriber_list_id: subscriber_list_id,
        ended: ended,
      ).to_json,
    )
end

def email_alert_api_has_updated_subscriber(id, new_address)
  stub_request(:patch, "#{EMAIL_ALERT_API_ENDPOINT}/subscribers/#{id}")
    .to_return(
      status: 200,
      body: get_subscriber_response(id, new_address).to_json,
    )
end

def email_alert_api_has_updated_subscription(subscription_id, frequency)
  stub_request(:patch, "#{EMAIL_ALERT_API_ENDPOINT}/subscriptions/#{subscription_id}")
    .to_return(
      status: 200,
      body: get_subscription_response(subscription_id, frequency: frequency).to_json,
    )
end

def email_alert_api_refuses_to_create_subscriber_list
  stub_request(:post, build_subscriber_lists_url)
    .to_return(status: 422)
end

def email_alert_api_refuses_to_create_subscription(subscribable_id, address, frequency)
  stub_request(:post, "#{EMAIL_ALERT_API_ENDPOINT}/subscriptions")
    .with(
      body: { subscribable_id: subscribable_id, address: address, frequency: frequency }.to_json
  ).to_return(status: 422)
end

def email_alert_api_unsubscribes_a_subscriber(subscriber_id)
  stub_request(:delete, "#{EMAIL_ALERT_API_ENDPOINT}/subscribers/#{subscriber_id}")
    .to_return(status: 204)
end

def email_alert_api_unsubscribes_a_subscription(uuid)
  stub_request(:post, "#{EMAIL_ALERT_API_ENDPOINT}/unsubscribe/#{uuid}")
    .with(body: "{}")
    .to_return(status: 204)
end

def get_subscriber_list_response(attributes)
  {
    "subscriber_list" => {
      "id" => "447135c3-07d6-4c3a-8a3b-efa49ef70e52",
      "title" => "Some title",
      "active_subscriptions_count" => 42,
    }.merge(attributes)
  }
end

def get_subscriber_response(id, address)
  {
    "subscriber" => {
      "id" => id,
      "address" => address
    }
  }
end

def get_subscriber_subscriptions_response(id, address)
  {
    "subscriber" => {
      "id" => id,
      "address" => address
    },
    "subscriptions" => [
      {
        "subscriber_id" => 1,
        "subscriber_list_id" => 1000,
        "frequency" => "daily",
        "id" => "447135c3-07d6-4c3a-8a3b-efa49ef70e52",
        "subscriber_list" => {
          "id" => 1000,
          "slug" => "some-thing"
        }
      }
    ]
  }
end

def get_subscription_response(
  id,
  frequency: "daily",
  title: "Some title",
  subscriber_id: 1,
  subscriber_list_id: 1000,
  ended: false
)
  {
    "subscription" => {
      "id" => id,
      "frequency" => frequency,
      "source" => "user_signed_up",
      "ended_at" => ended ? Time.now.rfc3339 : nil,
      "ended_reason" => ended ? "unsubscribed" : nil,
      "subscriber" => {
        "id" => subscriber_id,
        "address" => "test@example.com",
      },
      "subscriber_list" => {
        "id" => subscriber_list_id,
        "slug" => "some-thing",
        "title" => title,
      }
    }
  }
end

def post_alert_response
  {}
end

def stub_any_email_alert_api_call
  stub_request(:any, %r{\A#{EMAIL_ALERT_API_ENDPOINT}})
end