module Api
  module V1
    module Gateway
      class RegistrationsController < ApplicationController
        skip_before_action :authenticate_api_key!, only: [:create]

        def create
          device_id = params.require(:device_id)
          name = params[:name] || "Gateway #{device_id[0..7]}"

          # Check if gateway already exists
          gateway = ::Gateway.find_by(device_id: device_id)

          if gateway
            render json: {
              success: false,
              error: "Gateway already registered"
            }, status: :conflict
            return
          end

          # Create new gateway
          gateway = ::Gateway.new(
            device_id: device_id,
            name: name,
            status: "offline"
          )

          raw_key = gateway.generate_api_key!

          render json: {
            success: true,
            api_key: raw_key,
            device_id: gateway.device_id,
            websocket_url: websocket_url
          }, status: :created
        rescue ActionController::ParameterMissing => e
          render json: { error: e.message }, status: :bad_request
        end

        private

        def websocket_url
          if Rails.env.production?
            "wss://#{request.host}/cable"
          else
            "ws://#{request.host}:#{request.port}/cable"
          end
        end
      end
    end
  end
end