# frozen_string_literal: true

{{#generated_src_warning}}
{{generated_src_warning}}
{{/generated_src_warning}}
module {{module_name}}

  class {{class_name}}

    extend Aws::Deprecations

    # @overload def initialize({{#identifiers}}{{name}}, {{/identifiers}}options = {})
    {{#identifiers}}
    #   @param [{{type}}] {{name}}
    {{/identifiers}}
    #   @option options [Client] :client
    {{#identifiers?}}
    # @overload def initialize(options = {})
    {{#identifiers}}
    #   @option options [required, {{type}}] :{{name}}
    {{/identifiers}}
    #   @option options [Client] :client
    {{/identifiers?}}
    def initialize(*args)
      options = Hash === args.last ? args.pop.dup : {}
      {{#identifiers}}
      @{{name}} = extract_{{name}}(args, options)
      {{/identifiers}}
      {{#shape}}
      @data = options.delete(:data)
      {{/shape}}
      {{^shape}}
      @data = Aws::EmptyStructure.new
      {{/shape}}
      @client = options.delete(:client) || Client.new(options)
      @waiter_block_warned = false
    end

    # @!group Read-Only Attributes
    {{#identifiers}}

    # @return [{{type}}]
    def {{name}}
      @{{name}}
    end
    {{#alias}}
    alias :{{alias}} :{{name}}
    {{/alias}}
    {{/identifiers}}
    {{#data_attributes}}

    {{> documentation}}
    def {{name}}
      data[:{{name}}]
    end
    {{/data_attributes}}

    # @!endgroup

    # @return [Client]
    def client
      @client
    end

    {{#load_method}}
    {{> method}}
    {{/load_method}}
    alias :reload :load

    {{#data_method}}
    {{> method}}
    {{/data_method}}

    # @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
    {{#exists_waiter}}

    # @param [Hash] options ({})
    # @return [Boolean]
    #   Returns `true` if the {{class_name}} exists.
    def exists?(options = {})
      begin
        wait_until_exists(options.merge(max_attempts: 1))
        true
      rescue Aws::Waiters::Errors::UnexpectedError => e
        raise e.error
      rescue Aws::Waiters::Errors::WaiterFailed
        false
      end
    end
    {{/exists_waiter}}
    {{#waiters}}

    # @param [Hash] options ({})
    # @option options [Integer] :max_attempts ({{max_attempts}})
    # @option options [Float] :delay ({{delay}})
    # @option options [Proc] :before_attempt
    # @option options [Proc] :before_wait
    # @return [{{class_name}}]
    def wait_until_{{name}}(options = {}, &block)
      options, params = separate_params_and_options(options)
      waiter = Waiters::{{waiter_class_name}}.new(options)
      yield_waiter_and_warn(waiter, &block) if block_given?
      {{#wait_call}}
      {{#lines}}
      {{{.}}}{{/lines}}
      {{/wait_call}}
      {{class_name}}.new({
      {{#constructor_args}}
      {{#lines}}
      {{{.}}}{{/lines}}
      {{/constructor_args}}
      })
    end
    {{/waiters}}
    {{#wait_until}}

    # @deprecated Use [{{module_name}}::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) do |instance|
    #       instance.state.name == 'running'
    #     end
    #
    # ## 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
    #
    # @yieldparam [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::Plugins::UserAgent.feature('resource') do
        Aws::Waiters::Waiter.new(options).wait({})
      end
    end
    {{/wait_until}}
    {{#actions?}}

    # @!group Actions
    {{#actions}}

    {{> method}}
    {{/actions}}
    {{/actions?}}
    {{#associations?}}

    # @!group Associations
    {{#associations}}

    {{> method}}
    {{/associations}}
    {{/associations?}}

    {{#identifiers_method}}
    {{> method}}
    {{/identifiers_method}}
    deprecated(:identifiers)
    {{#identifiers?}}

    private
    {{#identifiers}}

    def extract_{{name}}(args, options)
      value = args[{{offset}}] || options.delete(:{{name}})
      case value
      when {{type}} then value
      when nil then raise ArgumentError, "missing required option :{{name}}"
      else
        msg = "expected :{{name}} to be a {{type}}, got #{value.class}"
        raise ArgumentError, msg
      end
    end
    {{/identifiers}}
    {{/identifiers?}}
    {{#waiters?}}

    def yield_waiter_and_warn(waiter, &block)
      if !@waiter_block_warned
        msg = "pass options to configure the waiter; "\
              "yielding the waiter is deprecated"
        warn(msg)
        @waiter_block_warned = true
      end
      yield(waiter.waiter)
    end

    def separate_params_and_options(options)
      opts = Set.new(
        [:client, :max_attempts, :delay, :before_attempt, :before_wait]
      )
      waiter_opts = {}
      waiter_params = {}
      options.each_pair do |key, value|
        if opts.include?(key)
          waiter_opts[key] = value
        else
          waiter_params[key] = value
        end
      end
      waiter_opts[:client] ||= @client
      [waiter_opts, waiter_params]
    end
    {{/waiters?}}

    {{^batch_actions?}}
    class Collection < Aws::Resources::Collection; end
    {{/batch_actions?}}
    {{#batch_actions?}}
    class Collection < Aws::Resources::Collection

      # @!group Batch Actions
      {{#batch_actions}}

      {{> method}}
      {{/batch_actions}}

      # @!endgroup

    end
    {{/batch_actions?}}
  end
end