# frozen_string_literal: true

module E621Ws
  module Status
    class WebhooksController < ApplicationController
      def index
      end

      def discord
        redirect_to(oauth_url(min: params[:min] == "true"), allow_other_host: true)
      end

      def discord_callback
        res = client.authorize(redirect_uri: Websites.config.e621_status_check_discord_redirect, code: params[:code])

        return redirect_to(e621_ws_status_webhook_path, alert: "Error: #{res.error_description}") if res.is_a?(Requests::DiscordOauth::Error)
        return redirect_to(e621_ws_status_webhook_path, alert: "Error: Failed to get webhook.") if res.webhook.nil?

        uid = res.scope.include?("identify") ? res.user_id : nil
        hook = E621Webhook.from_struct(res.webhook, uid)

        if hook.is_a?(Symbol)
          # noinspection RubyCaseWithoutElseBlockInspection
          case hook
          when :too_many_channel
            return redirect_to(e621_ws_status_webhook_path, alert: "Error: You already have a status check enabled in that channel. Delete the other webhook to use a new webhook. The newly created webhook will be automatically deleted.")
          when :too_many_guild
            return redirect_to(e621_ws_status_webhook_path, alert: "Error: You've already enabled #{E621Webhook::MAX_PER_GUILD} status checks in that server. Please delete the other webhooks before adding a new check. The newly created webhook will be automatically deleted.")
          end
        end
        redirect_to(e621_ws_root_path, notice: "Check successfully setup. Delete the webhook to disable the updates.")
      end

      private

      def client
        Requests::DiscordOauth.new(
          client_id:     Websites.config.e621_status_check_discord_id,
          client_secret: Websites.config.e621_status_check_discord_secret,
        )
      end

      def oauth_url(min: false)
        DiscordLink.for(
          client_id:    Websites.config.e621_status_check_discord_id,
          redirect_uri: Websites.config.e621_status_check_discord_redirect,
          scope:        Websites.config.e621_status_check_discord_scopes[min ? :min : :all],
        )
      end
    end
  end
end