# WARNING ABOUT GENERATED CODE
#
# This file is generated. See the contributing guide for more information:
# https://github.com/aws/aws-sdk-ruby/blob/master/CONTRIBUTING.md
#
# WARNING ABOUT GENERATED CODE

module Aws::RDS
  class DBEngine

    extend Aws::Deprecations

    # @overload def initialize(name, options = {})
    #   @param [String] name
    #   @option options [Client] :client
    # @overload def initialize(options = {})
    #   @option options [required, String] :name
    #   @option options [Client] :client
    def initialize(*args)
      options = Hash === args.last ? args.pop.dup : {}
      @name = extract_name(args, options)
      @data = Aws::EmptyStructure.new
      @client = options.delete(:client) || Client.new(options)
    end

    # @!group Read-Only Attributes

    # @return [String]
    def name
      @name
    end

    # @!endgroup

    # @return [Client]
    def client
      @client
    end

    # @raise [NotImplementedError]
    # @api private
    def load
      msg = "#load is not implemented, data only available via enumeration"
      raise NotImplementedError, msg
    end
    alias :reload :load

    # @api private
    # @return [EmptyStructure]
    def data
      @data
    end

    # @return [Boolean]
    #   Returns `true` if this resource is loaded.  Accessing attributes or
    #   {#data} on an unloaded resource will trigger a call to {#load}.
    def data_loaded?
      !!@data
    end

    # @deprecated Use [Aws::RDS::Client] #wait_until instead
    #
    # Waiter polls an API operation until a resource enters a desired
    # state.
    #
    # @note The waiting operation is performed on a copy. The original resource remains unchanged
    #
    # ## Basic Usage
    #
    # Waiter will polls until it is successful, it fails by
    # entering a terminal state, or until a maximum number of attempts
    # are made.
    #
    #     # polls in a loop until condition is true
    #     resource.wait_until(options) {|resource| condition}
    #
    # ## Example
    #
    #     instance.wait_until(max_attempts:10, delay:5) {|instance| instance.state.name == 'running' }
    #
    # ## Configuration
    #
    # You can configure the maximum number of polling attempts, and the
    # delay (in seconds) between each polling attempt. The waiting condition is set
    # by passing a block to {#wait_until}:
    #
    #     # poll for ~25 seconds
    #     resource.wait_until(max_attempts:5,delay:5) {|resource|...}
    #
    # ## Callbacks
    #
    # You can be notified before each polling attempt and before each
    # delay. If you throw `:success` or `:failure` from these callbacks,
    # it will terminate the waiter.
    #
    #     started_at = Time.now
    #     # poll for 1 hour, instead of a number of attempts
    #     proc = Proc.new do |attempts, response|
    #       throw :failure if Time.now - started_at > 3600
    #     end
    #
    #       # disable max attempts
    #     instance.wait_until(before_wait:proc, max_attempts:nil) {...}
    #
    # ## Handling Errors
    #
    # When a waiter is successful, it returns the Resource. When a waiter
    # fails, it raises an error.
    #
    #     begin
    #       resource.wait_until(...)
    #     rescue Aws::Waiters::Errors::WaiterFailed
    #       # resource did not enter the desired state in time
    #     end
    #
    #
    # @yield param [Resource] resource to be used in the waiting condition
    #
    # @raise [Aws::Waiters::Errors::FailureStateError] Raised when the waiter terminates
    #   because the waiter has entered a state that it will not transition
    #   out of, preventing success.
    #
    #   yet successful.
    #
    # @raise [Aws::Waiters::Errors::UnexpectedError] Raised when an error is encountered
    #   while polling for a resource that is not expected.
    #
    # @raise [NotImplementedError] Raised when the resource does not
    #
    # @option options [Integer] :max_attempts (10) Maximum number of
    # attempts
    # @option options [Integer] :delay (10) Delay between each
    # attempt in seconds
    # @option options [Proc] :before_attempt (nil) Callback
    # invoked before each attempt
    # @option options [Proc] :before_wait (nil) Callback
    # invoked before each wait
    # @return [Resource] if the waiter was successful
    def wait_until(options = {}, &block)
      self_copy = self.dup
      attempts = 0
      options[:max_attempts] = 10 unless options.key?(:max_attempts)
      options[:delay] ||= 10
      options[:poller] = Proc.new do
        attempts += 1
        if block.call(self_copy)
          [:success, self_copy]
        else
          self_copy.reload unless attempts == options[:max_attempts]
          :retry
        end
      end
      Aws::Waiters::Waiter.new(options).wait({})
    end

    # @!group Associations

    # @example Request syntax with placeholder values
    #
    #   option_group_options = db_engine.option_group_options({
    #     major_engine_version: "String",
    #     filters: [
    #       {
    #         name: "String", # required
    #         values: ["String"], # required
    #       },
    #     ],
    #   })
    # @param [Hash] options ({})
    # @option options [String] :major_engine_version
    #   If specified, filters the results to include only options for the
    #   specified major engine version.
    # @option options [Array<Types::Filter>] :filters
    #   This parameter is not currently supported.
    # @return [OptionGroupOption::Collection]
    def option_group_options(options = {})
      batches = Enumerator.new do |y|
        options = options.merge(engine_name: @name)
        resp = @client.describe_option_group_options(options)
        resp.each_page do |page|
          batch = []
          page.data.option_group_options.each do |o|
            batch << OptionGroupOption.new(
              name: o.name,
              data: o,
              client: @client
            )
          end
          y.yield(batch)
        end
      end
      OptionGroupOption::Collection.new(batches)
    end

    # @example Request syntax with placeholder values
    #
    #   option_groups = db_engine.option_groups({
    #     option_group_name: "String",
    #     filters: [
    #       {
    #         name: "String", # required
    #         values: ["String"], # required
    #       },
    #     ],
    #     major_engine_version: "String",
    #   })
    # @param [Hash] options ({})
    # @option options [String] :option_group_name
    #   The name of the option group to describe. Cannot be supplied together
    #   with EngineName or MajorEngineVersion.
    # @option options [Array<Types::Filter>] :filters
    #   This parameter is not currently supported.
    # @option options [String] :major_engine_version
    #   Filters the list of option groups to only include groups associated
    #   with a specific database engine version. If specified, then EngineName
    #   must also be specified.
    # @return [OptionGroup::Collection]
    def option_groups(options = {})
      batches = Enumerator.new do |y|
        options = options.merge(engine_name: @name)
        resp = @client.describe_option_groups(options)
        resp.each_page do |page|
          batch = []
          page.data.option_groups_list.each do |o|
            batch << OptionGroup.new(
              name: o.option_group_name,
              data: o,
              client: @client
            )
          end
          y.yield(batch)
        end
      end
      OptionGroup::Collection.new(batches)
    end

    # @param [String] version
    # @return [DBEngineVersion]
    def version(version)
      DBEngineVersion.new(
        engine_name: @name,
        version: version,
        client: @client
      )
    end

    # @example Request syntax with placeholder values
    #
    #   versions = db_engine.versions({
    #     engine_version: "String",
    #     db_parameter_group_family: "String",
    #     filters: [
    #       {
    #         name: "String", # required
    #         values: ["String"], # required
    #       },
    #     ],
    #     default_only: false,
    #     list_supported_character_sets: false,
    #     list_supported_timezones: false,
    #   })
    # @param [Hash] options ({})
    # @option options [String] :engine_version
    #   The database engine version to return.
    #
    #   Example: `5.1.49`
    # @option options [String] :db_parameter_group_family
    #   The name of a specific DB parameter group family to return details
    #   for.
    #
    #   Constraints:
    #
    #   * Must be 1 to 255 alphanumeric characters
    #
    #   * First character must be a letter
    #
    #   * Cannot end with a hyphen or contain two consecutive hyphens
    # @option options [Array<Types::Filter>] :filters
    #   Not currently supported.
    # @option options [Boolean] :default_only
    #   Indicates that only the default version of the specified engine or
    #   engine and major version combination is returned.
    # @option options [Boolean] :list_supported_character_sets
    #   If this parameter is specified and the requested engine supports the
    #   `CharacterSetName` parameter for `CreateDBInstance`, the response
    #   includes a list of supported character sets for each engine version.
    # @option options [Boolean] :list_supported_timezones
    #   If this parameter is specified and the requested engine supports the
    #   `TimeZone` parameter for `CreateDBInstance`, the response includes a
    #   list of supported time zones for each engine version.
    # @return [DBEngineVersion::Collection]
    def versions(options = {})
      batches = Enumerator.new do |y|
        options = options.merge(engine: @name)
        resp = @client.describe_db_engine_versions(options)
        resp.each_page do |page|
          batch = []
          page.data.db_engine_versions.each do |d|
            batch << DBEngineVersion.new(
              engine_name: @name,
              version: d.engine_version,
              data: d,
              client: @client
            )
          end
          y.yield(batch)
        end
      end
      DBEngineVersion::Collection.new(batches)
    end

    # @deprecated
    # @api private
    def identifiers
      { name: @name }
    end
    deprecated(:identifiers)

    private

    def extract_name(args, options)
      value = args[0] || options.delete(:name)
      case value
      when String then value
      when nil then raise ArgumentError, "missing required option :name"
      else
        msg = "expected :name to be a String, got #{value.class}"
        raise ArgumentError, msg
      end
    end

    class Collection < Aws::Resources::Collection; end
  end
end