# frozen_string_literal: true

module ErpIntegration
  module Fulfil
    class Client
      attr_reader :api_keys_pool, :base_url
      attr_writer :connection, :faraday_adapter, :rotate_statuses

      def initialize(api_keys_pool:, base_url:, logger: nil)
        @api_keys_pool = api_keys_pool
        @base_url = base_url.strip
        @logger = logger
      end

      # Sets the default adapter for the Faraday Connection.
      # @return [Symbol] The default Faraday adapter
      def faraday_adapter
        @faraday_adapter ||= Faraday.default_adapter
      end

      # Sets up the Faraday connection to talk to the Fulfil API.
      # @return [Faraday::Connection] The configured Faraday connection
      def connection
        @connection ||= Faraday.new(url: base_url) do |faraday|
          faraday.headers = default_headers

          faraday.request :json # Encode request bodies as JSON
          faraday.request :retry # Retry transient failures

          faraday.response :follow_redirects
          faraday.response :json # Decode response bodies as JSON

          # Custom error handling for the error response
          faraday.use ErpIntegration::Middleware::ErrorHandling
          # Custom middleware for rotating API keys
          faraday.use ErpIntegration::Middleware::ApiKeysRotation, api_keys_pool: api_keys_pool
          # Custom middleware for logging requests and responses
          faraday.use ErpIntegration::Middleware::Logger, @logger if @logger

          # Adapter definition should be last in order to make the json parsers be loaded correctly
          faraday.adapter faraday_adapter
        end
      end

      %i[delete get patch put post].each do |action_name|
        define_method(action_name) do |path, options = {}|
          if api_key.nil? || base_url.nil?
            raise ErpIntegration::Error, 'The Fulfil API key and/or base URL are missing.'
          end

          rate_limiter.within_limit do
            connection.public_send(action_name, "api/#{version}/#{path}", options).body
          end
        end
      end

      # Sets the default version for the Fulfil API endpoints.
      # @return [String] The Fulfil API version to be used
      def version
        @version ||= 'v2'
      end

      private

      def api_key
        api_keys_pool.current_key
      end

      def rate_limiter
        RateLimiter.find_by_api_key(api_key)
      end

      def default_headers
        {
          'Accept': 'application/json',
          'Content-Type': 'application/json'
        }
      end
    end
  end
end