require 'uri'
require 'elastic/site-search/version'

module Elastic
  module SiteSearch
    module Configuration
      DEFAULT_ENDPOINT = "https://api.swiftype.com/api/v1/"

      VALID_OPTIONS_KEYS = [
        :api_key,
        :user_agent,
        :platform_client_id,
        :platform_client_secret,
        :endpoint
      ]

      attr_accessor *VALID_OPTIONS_KEYS

      def self.extended(base)
        base.reset
      end

      # Reset configuration to default values.
      def reset
        self.api_key = nil
        self.endpoint = DEFAULT_ENDPOINT
        self.user_agent = nil
        self.platform_client_id = nil
        self.platform_client_secret = nil
        self
      end

      # Yields the Elastic::SiteSearch::Configuration module which can be used to set configuration options.
      #
      # @return self
      def configure
        yield self
        self
      end

      # Return a hash of the configured options.
      def options
        options = {}
        VALID_OPTIONS_KEYS.each{|k| options[k] = send(k)}
        options
      end

      # Set api_key and endpoint based on a URL with HTTP authentication.
      def authenticated_url=(url)
        uri = URI(url)
        self.api_key = uri.user
        uri.user = nil
        uri.password = nil
        self.endpoint = uri.to_s
      end

      # setter for endpoint that ensures it always ends in '/'
      def endpoint=(endpoint)
        if endpoint.end_with?('/')
          @endpoint = endpoint
        else
          @endpoint = "#{endpoint}/"
        end
      end
    end
  end
end