pokemon.trade/app/controllers/api/graphql_controller.rb

# frozen_string_literal: true

class API::GraphqlController < API::ApplicationController
  def execute
    variables = ensure_hash(params[:variables])
    query = params[:query]
    operation_name = params[:operationName]
    context = {
      # Query context goes here, for example:
      # current_user: current_user,
    }
    result = PokemonTradeSchema.execute(query, variables: variables, context: context, operation_name: operation_name)
    render json: result
  rescue StandardError => e
    raise e unless Rails.env.development?

    handle_error_in_development(e)
  end

  private

    # Handle form data, JSON body, or a blank value
    def ensure_hash(ambiguous_param)
      case ambiguous_param
      when String
        if ambiguous_param.present?
          ensure_hash(JSON.parse(ambiguous_param))
        else
          {}
        end
      when Hash, ActionController::Parameters
        ambiguous_param
      when nil
        {}
      else
        raise ArgumentError, "Unexpected parameter: #{ambiguous_param}"
      end
    end

    def handle_error_in_development(err)
      logger.error err.message
      logger.error err.backtrace.join("\n")

      render json: {errors: [{message: err.message, backtrace: err.backtrace}], data: {}}, status: :internal_server_error
    end
end