require_relative 'base_client'

module PactBroker
  module Client
    class Matrix < BaseClient
      def get selectors, options = {}
        latestby = selectors.size == 1 ? 'cvp' : 'cvpv'
        query = {
          q: convert_selector_hashes_to_params(selectors),
          latestby: latestby
        }.merge(query_options(options))
        response = self.class.get("/matrix", query: query, headers: default_get_headers)
        response = handle_response(response) do
          JSON.parse(response.body, symbolize_names: true)
        end
      end

      def handle_response response
        if response.success?
          yield
        elsif response.code == 401
          raise Error.new("Authentication failed")
        elsif response.code == 404
          raise Error.new("Matrix resource not found at #{base_url}/matrix. Please upgrade your broker to the latest version.")
        else
          error_message = nil
          begin
            errors = JSON.parse(response.body)['errors']
            error_message = if errors.is_a?(Array)
              errors.join("\n")
            elsif errors.is_a?(Hash)
              errors.collect{ |key, value| "#{key}: #{value}" }.join("\n")
            else
              response.body
            end
          rescue
            raise Error.new(response.body)
          end
          raise Error.new(error_message)
        end
      end

      def query_options(options)
        opts = {}
        if options.key?(:success)
          opts[:success] = [*options[:success]]
        end
        if options[:to_tag]
          opts[:latest] = 'true'
          opts[:tag] = options[:to_tag]
        end
        opts
      end

      def convert_selector_hashes_to_params(selectors)
        selectors.collect do |selector|
          { pacticipant: selector[:pacticipant] }.tap do | hash |
            hash[:version] = selector[:version] if selector[:version]
            hash[:latest] = 'true' if selector[:latest]
            hash[:tag] = selector[:tag] if selector[:tag]
          end
        end
      end
    end
  end
end