# Copyright 2018 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

require "google/gax"
require "pathname"

module Google
  module Cloud
    # rubocop:disable LineLength

    ##
    # # Ruby Client for Dialogflow API ([Alpha](https://github.com/GoogleCloudPlatform/google-cloud-ruby#versioning))
    #
    # [Dialogflow API][Product Documentation]:
    # An end-to-end development suite for conversational interfaces (e.g.,
    # chatbots, voice-powered apps and devices).
    # - [Product Documentation][]
    #
    # ## Quick Start
    # In order to use this library, you first need to go through the following
    # steps:
    #
    # 1. [Select or create a Cloud Platform project.](https://console.cloud.google.com/project)
    # 2. [Enable billing for your project.](https://cloud.google.com/billing/docs/how-to/modify-project#enable_billing_for_a_project)
    # 3. [Enable the Dialogflow API.](https://console.cloud.google.com/apis/api/dialogflow)
    # 4. [Setup Authentication.](https://googlecloudplatform.github.io/google-cloud-ruby/#/docs/google-cloud/master/guides/authentication)
    #
    # ### Next Steps
    # - Read the [Dialogflow API Product documentation][Product Documentation]
    #   to learn more about the product and see How-to Guides.
    # - View this [repository's main README](https://github.com/GoogleCloudPlatform/google-cloud-ruby/blob/master/README.md)
    #   to see the full list of Cloud APIs that we cover.
    #
    # [Product Documentation]: https://cloud.google.com/dialogflow
    #
    #
    module Dialogflow
      # rubocop:enable LineLength

      FILE_DIR = File.realdirpath(Pathname.new(__FILE__).join("..").join("dialogflow"))

      AVAILABLE_VERSIONS = Dir["#{FILE_DIR}/*"]
        .select { |file| File.directory?(file) }
        .select { |dir| Google::Gax::VERSION_MATCHER.match(File.basename(dir)) }
        .select { |dir| File.exist?(dir + ".rb") }
        .map { |dir| File.basename(dir) }

      module Agents
        ##
        # Agents are best described as Natural Language Understanding (NLU) modules
        # that transform user requests into actionable data. You can include agents
        # in your app, product, or service to determine user intent and respond to the
        # user in a natural way.
        #
        # After you create an agent, you can add {Google::Cloud::Dialogflow::V2::Intents Intents}, {Google::Cloud::Dialogflow::V2::Contexts Contexts},
        # {Google::Cloud::Dialogflow::V2::EntityTypes Entity Types}, {Google::Cloud::Dialogflow::V2::WebhookRequest Webhooks}, and so on to
        # manage the flow of a conversation and match user input to predefined intents
        # and actions.
        #
        # You can create an agent using both Dialogflow Standard Edition and
        # Dialogflow Enterprise Edition. For details, see
        # [Dialogflow Editions](https://cloud.google.com/dialogflow-enterprise/docs/editions).
        #
        # You can save your agent for backup or versioning by exporting the agent by
        # using the {Google::Cloud::Dialogflow::V2::Agents::ExportAgent ExportAgent} method. You can import a saved
        # agent by using the {Google::Cloud::Dialogflow::V2::Agents::ImportAgent ImportAgent} method.
        #
        # Dialogflow provides several
        # [prebuilt agents](https://dialogflow.com/docs/prebuilt-agents) for common
        # conversation scenarios such as determining a date and time, converting
        # currency, and so on.
        #
        # For more information about agents, see the
        # [Dialogflow documentation](https://dialogflow.com/docs/agents).
        #
        # @param version [Symbol, String]
        #   The major version of the service to be used. By default :v2
        #   is used.
        # @overload new(version:, credentials:, scopes:, client_config:, timeout:)
        #   @param credentials [Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc]
        #     Provides the means for authenticating requests made by the client. This parameter can
        #     be many types.
        #     A `Google::Auth::Credentials` uses a the properties of its represented keyfile for
        #     authenticating requests made by this client.
        #     A `String` will be treated as the path to the keyfile to be used for the construction of
        #     credentials for this client.
        #     A `Hash` will be treated as the contents of a keyfile to be used for the construction of
        #     credentials for this client.
        #     A `GRPC::Core::Channel` will be used to make calls through.
        #     A `GRPC::Core::ChannelCredentials` for the setting up the RPC client. The channel credentials
        #     should already be composed with a `GRPC::Core::CallCredentials` object.
        #     A `Proc` will be used as an updater_proc for the Grpc channel. The proc transforms the
        #     metadata for requests, generally, to give OAuth credentials.
        #   @param scopes [Array<String>]
        #     The OAuth scopes for this service. This parameter is ignored if
        #     an updater_proc is supplied.
        #   @param client_config [Hash]
        #     A Hash for call options for each method. See
        #     Google::Gax#construct_settings for the structure of
        #     this data. Falls back to the default config if not specified
        #     or the specified config is missing data points.
        #   @param timeout [Numeric]
        #     The default timeout, in seconds, for calls made through this client.
        def self.new(*args, version: :v2, **kwargs)
          unless AVAILABLE_VERSIONS.include?(version.to_s.downcase)
            raise "The version: #{version} is not available. The available versions " \
              "are: [#{AVAILABLE_VERSIONS.join(", ")}]"
          end

          require "#{FILE_DIR}/#{version.to_s.downcase}"
          version_module = Google::Cloud::Dialogflow
            .constants
            .select {|sym| sym.to_s.downcase == version.to_s.downcase}
            .first
          Google::Cloud::Dialogflow.const_get(version_module)::Agents.new(*args, **kwargs)
        end
      end

      module Contexts
        ##
        # A context represents additional information included with user input or with
        # an intent returned by the Dialogflow API. Contexts are helpful for
        # differentiating user input which may be vague or have a different meaning
        # depending on additional details from your application such as user setting
        # and preferences, previous user input, where the user is in your application,
        # geographic location, and so on.
        #
        # You can include contexts as input parameters of a
        # {Google::Cloud::Dialogflow::V2::Sessions::DetectIntent DetectIntent} (or
        # {Google::Cloud::Dialogflow::V2::Sessions::StreamingDetectIntent StreamingDetectIntent}) request,
        # or as output contexts included in the returned intent.
        # Contexts expire when an intent is matched, after the number of +DetectIntent+
        # requests specified by the +lifespan_count+ parameter, or after 10 minutes
        # if no intents are matched for a +DetectIntent+ request.
        #
        # For more information about contexts, see the
        # [Dialogflow documentation](https://dialogflow.com/docs/contexts).
        #
        # @param version [Symbol, String]
        #   The major version of the service to be used. By default :v2
        #   is used.
        # @overload new(version:, credentials:, scopes:, client_config:, timeout:)
        #   @param credentials [Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc]
        #     Provides the means for authenticating requests made by the client. This parameter can
        #     be many types.
        #     A `Google::Auth::Credentials` uses a the properties of its represented keyfile for
        #     authenticating requests made by this client.
        #     A `String` will be treated as the path to the keyfile to be used for the construction of
        #     credentials for this client.
        #     A `Hash` will be treated as the contents of a keyfile to be used for the construction of
        #     credentials for this client.
        #     A `GRPC::Core::Channel` will be used to make calls through.
        #     A `GRPC::Core::ChannelCredentials` for the setting up the RPC client. The channel credentials
        #     should already be composed with a `GRPC::Core::CallCredentials` object.
        #     A `Proc` will be used as an updater_proc for the Grpc channel. The proc transforms the
        #     metadata for requests, generally, to give OAuth credentials.
        #   @param scopes [Array<String>]
        #     The OAuth scopes for this service. This parameter is ignored if
        #     an updater_proc is supplied.
        #   @param client_config [Hash]
        #     A Hash for call options for each method. See
        #     Google::Gax#construct_settings for the structure of
        #     this data. Falls back to the default config if not specified
        #     or the specified config is missing data points.
        #   @param timeout [Numeric]
        #     The default timeout, in seconds, for calls made through this client.
        def self.new(*args, version: :v2, **kwargs)
          unless AVAILABLE_VERSIONS.include?(version.to_s.downcase)
            raise "The version: #{version} is not available. The available versions " \
              "are: [#{AVAILABLE_VERSIONS.join(", ")}]"
          end

          require "#{FILE_DIR}/#{version.to_s.downcase}"
          version_module = Google::Cloud::Dialogflow
            .constants
            .select {|sym| sym.to_s.downcase == version.to_s.downcase}
            .first
          Google::Cloud::Dialogflow.const_get(version_module)::Contexts.new(*args, **kwargs)
        end
      end

      module EntityTypes
        ##
        # Entities are extracted from user input and represent parameters that are
        # meaningful to your application. For example, a date range, a proper name
        # such as a geographic location or landmark, and so on. Entities represent
        # actionable data for your application.
        #
        # When you define an entity, you can also include synonyms that all map to
        # that entity. For example, "soft drink", "soda", "pop", and so on.
        #
        # There are three types of entities:
        #
        # * **System** - entities that are defined by the Dialogflow API for common
        #   data types such as date, time, currency, and so on. A system entity is
        #   represented by the +EntityType+ type.
        #
        # * **Developer** - entities that are defined by you that represent
        #   actionable data that is meaningful to your application. For example,
        #   you could define a +pizza.sauce+ entity for red or white pizza sauce,
        #   a +pizza.cheese+ entity for the different types of cheese on a pizza,
        #   a +pizza.topping+ entity for different toppings, and so on. A developer
        #   entity is represented by the +EntityType+ type.
        #
        # * **User** - entities that are built for an individual user such as
        #   favorites, preferences, playlists, and so on. A user entity is
        #   represented by the {Google::Cloud::Dialogflow::V2::SessionEntityType SessionEntityType} type.
        #
        # For more information about entity types, see the
        # [Dialogflow documentation](https://dialogflow.com/docs/entities).
        #
        # @param version [Symbol, String]
        #   The major version of the service to be used. By default :v2
        #   is used.
        # @overload new(version:, credentials:, scopes:, client_config:, timeout:)
        #   @param credentials [Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc]
        #     Provides the means for authenticating requests made by the client. This parameter can
        #     be many types.
        #     A `Google::Auth::Credentials` uses a the properties of its represented keyfile for
        #     authenticating requests made by this client.
        #     A `String` will be treated as the path to the keyfile to be used for the construction of
        #     credentials for this client.
        #     A `Hash` will be treated as the contents of a keyfile to be used for the construction of
        #     credentials for this client.
        #     A `GRPC::Core::Channel` will be used to make calls through.
        #     A `GRPC::Core::ChannelCredentials` for the setting up the RPC client. The channel credentials
        #     should already be composed with a `GRPC::Core::CallCredentials` object.
        #     A `Proc` will be used as an updater_proc for the Grpc channel. The proc transforms the
        #     metadata for requests, generally, to give OAuth credentials.
        #   @param scopes [Array<String>]
        #     The OAuth scopes for this service. This parameter is ignored if
        #     an updater_proc is supplied.
        #   @param client_config [Hash]
        #     A Hash for call options for each method. See
        #     Google::Gax#construct_settings for the structure of
        #     this data. Falls back to the default config if not specified
        #     or the specified config is missing data points.
        #   @param timeout [Numeric]
        #     The default timeout, in seconds, for calls made through this client.
        def self.new(*args, version: :v2, **kwargs)
          unless AVAILABLE_VERSIONS.include?(version.to_s.downcase)
            raise "The version: #{version} is not available. The available versions " \
              "are: [#{AVAILABLE_VERSIONS.join(", ")}]"
          end

          require "#{FILE_DIR}/#{version.to_s.downcase}"
          version_module = Google::Cloud::Dialogflow
            .constants
            .select {|sym| sym.to_s.downcase == version.to_s.downcase}
            .first
          Google::Cloud::Dialogflow.const_get(version_module)::EntityTypes.new(*args, **kwargs)
        end
      end

      module Intents
        ##
        # An intent represents a mapping between input from a user and an action to
        # be taken by your application. When you pass user input to the
        # {Google::Cloud::Dialogflow::V2::Sessions::DetectIntent DetectIntent} (or
        # {Google::Cloud::Dialogflow::V2::Sessions::StreamingDetectIntent StreamingDetectIntent}) method, the
        # Dialogflow API analyzes the input and searches
        # for a matching intent. If no match is found, the Dialogflow API returns a
        # fallback intent (+is_fallback+ = true).
        #
        # You can provide additional information for the Dialogflow API to use to
        # match user input to an intent by adding the following to your intent.
        #
        # * **Contexts** - provide additional context for intent analysis. For
        #   example, if an intent is related to an object in your application that
        #   plays music, you can provide a context to determine when to match the
        #   intent if the user input is “turn it off”.  You can include a context
        #   that matches the intent when there is previous user input of
        #   "play music", and not when there is previous user input of
        #   "turn on the light".
        #
        # * **Events** - allow for matching an intent by using an event name
        #   instead of user input. Your application can provide an event name and
        #   related parameters to the Dialogflow API to match an intent. For
        #   example, when your application starts, you can send a welcome event
        #   with a user name parameter to the Dialogflow API to match an intent with
        #   a personalized welcome message for the user.
        #
        # * **Training phrases** - provide examples of user input to train the
        #   Dialogflow API agent to better match intents.
        #
        # For more information about intents, see the
        # [Dialogflow documentation](https://dialogflow.com/docs/intents).
        #
        # @param version [Symbol, String]
        #   The major version of the service to be used. By default :v2
        #   is used.
        # @overload new(version:, credentials:, scopes:, client_config:, timeout:)
        #   @param credentials [Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc]
        #     Provides the means for authenticating requests made by the client. This parameter can
        #     be many types.
        #     A `Google::Auth::Credentials` uses a the properties of its represented keyfile for
        #     authenticating requests made by this client.
        #     A `String` will be treated as the path to the keyfile to be used for the construction of
        #     credentials for this client.
        #     A `Hash` will be treated as the contents of a keyfile to be used for the construction of
        #     credentials for this client.
        #     A `GRPC::Core::Channel` will be used to make calls through.
        #     A `GRPC::Core::ChannelCredentials` for the setting up the RPC client. The channel credentials
        #     should already be composed with a `GRPC::Core::CallCredentials` object.
        #     A `Proc` will be used as an updater_proc for the Grpc channel. The proc transforms the
        #     metadata for requests, generally, to give OAuth credentials.
        #   @param scopes [Array<String>]
        #     The OAuth scopes for this service. This parameter is ignored if
        #     an updater_proc is supplied.
        #   @param client_config [Hash]
        #     A Hash for call options for each method. See
        #     Google::Gax#construct_settings for the structure of
        #     this data. Falls back to the default config if not specified
        #     or the specified config is missing data points.
        #   @param timeout [Numeric]
        #     The default timeout, in seconds, for calls made through this client.
        def self.new(*args, version: :v2, **kwargs)
          unless AVAILABLE_VERSIONS.include?(version.to_s.downcase)
            raise "The version: #{version} is not available. The available versions " \
              "are: [#{AVAILABLE_VERSIONS.join(", ")}]"
          end

          require "#{FILE_DIR}/#{version.to_s.downcase}"
          version_module = Google::Cloud::Dialogflow
            .constants
            .select {|sym| sym.to_s.downcase == version.to_s.downcase}
            .first
          Google::Cloud::Dialogflow.const_get(version_module)::Intents.new(*args, **kwargs)
        end
      end

      module SessionEntityTypes
        ##
        # Entities are extracted from user input and represent parameters that are
        # meaningful to your application. For example, a date range, a proper name
        # such as a geographic location or landmark, and so on. Entities represent
        # actionable data for your application.
        #
        # Session entity types are referred to as **User** entity types and are
        # entities that are built for an individual user such as
        # favorites, preferences, playlists, and so on. You can redefine a session
        # entity type at the session level.
        #
        # For more information about entity types, see the
        # [Dialogflow documentation](https://dialogflow.com/docs/entities).
        #
        # @param version [Symbol, String]
        #   The major version of the service to be used. By default :v2
        #   is used.
        # @overload new(version:, credentials:, scopes:, client_config:, timeout:)
        #   @param credentials [Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc]
        #     Provides the means for authenticating requests made by the client. This parameter can
        #     be many types.
        #     A `Google::Auth::Credentials` uses a the properties of its represented keyfile for
        #     authenticating requests made by this client.
        #     A `String` will be treated as the path to the keyfile to be used for the construction of
        #     credentials for this client.
        #     A `Hash` will be treated as the contents of a keyfile to be used for the construction of
        #     credentials for this client.
        #     A `GRPC::Core::Channel` will be used to make calls through.
        #     A `GRPC::Core::ChannelCredentials` for the setting up the RPC client. The channel credentials
        #     should already be composed with a `GRPC::Core::CallCredentials` object.
        #     A `Proc` will be used as an updater_proc for the Grpc channel. The proc transforms the
        #     metadata for requests, generally, to give OAuth credentials.
        #   @param scopes [Array<String>]
        #     The OAuth scopes for this service. This parameter is ignored if
        #     an updater_proc is supplied.
        #   @param client_config [Hash]
        #     A Hash for call options for each method. See
        #     Google::Gax#construct_settings for the structure of
        #     this data. Falls back to the default config if not specified
        #     or the specified config is missing data points.
        #   @param timeout [Numeric]
        #     The default timeout, in seconds, for calls made through this client.
        def self.new(*args, version: :v2, **kwargs)
          unless AVAILABLE_VERSIONS.include?(version.to_s.downcase)
            raise "The version: #{version} is not available. The available versions " \
              "are: [#{AVAILABLE_VERSIONS.join(", ")}]"
          end

          require "#{FILE_DIR}/#{version.to_s.downcase}"
          version_module = Google::Cloud::Dialogflow
            .constants
            .select {|sym| sym.to_s.downcase == version.to_s.downcase}
            .first
          Google::Cloud::Dialogflow.const_get(version_module)::SessionEntityTypes.new(*args, **kwargs)
        end
      end

      module Sessions
        ##
        # A session represents an interaction with a user. You retrieve user input
        # and pass it to the {Google::Cloud::Dialogflow::V2::Sessions::DetectIntent DetectIntent} (or
        # {Google::Cloud::Dialogflow::V2::Sessions::StreamingDetectIntent StreamingDetectIntent}) method to determine
        # user intent and respond.
        #
        # @param version [Symbol, String]
        #   The major version of the service to be used. By default :v2
        #   is used.
        # @overload new(version:, credentials:, scopes:, client_config:, timeout:)
        #   @param credentials [Google::Auth::Credentials, String, Hash, GRPC::Core::Channel, GRPC::Core::ChannelCredentials, Proc]
        #     Provides the means for authenticating requests made by the client. This parameter can
        #     be many types.
        #     A `Google::Auth::Credentials` uses a the properties of its represented keyfile for
        #     authenticating requests made by this client.
        #     A `String` will be treated as the path to the keyfile to be used for the construction of
        #     credentials for this client.
        #     A `Hash` will be treated as the contents of a keyfile to be used for the construction of
        #     credentials for this client.
        #     A `GRPC::Core::Channel` will be used to make calls through.
        #     A `GRPC::Core::ChannelCredentials` for the setting up the RPC client. The channel credentials
        #     should already be composed with a `GRPC::Core::CallCredentials` object.
        #     A `Proc` will be used as an updater_proc for the Grpc channel. The proc transforms the
        #     metadata for requests, generally, to give OAuth credentials.
        #   @param scopes [Array<String>]
        #     The OAuth scopes for this service. This parameter is ignored if
        #     an updater_proc is supplied.
        #   @param client_config [Hash]
        #     A Hash for call options for each method. See
        #     Google::Gax#construct_settings for the structure of
        #     this data. Falls back to the default config if not specified
        #     or the specified config is missing data points.
        #   @param timeout [Numeric]
        #     The default timeout, in seconds, for calls made through this client.
        def self.new(*args, version: :v2, **kwargs)
          unless AVAILABLE_VERSIONS.include?(version.to_s.downcase)
            raise "The version: #{version} is not available. The available versions " \
              "are: [#{AVAILABLE_VERSIONS.join(", ")}]"
          end

          require "#{FILE_DIR}/#{version.to_s.downcase}"
          version_module = Google::Cloud::Dialogflow
            .constants
            .select {|sym| sym.to_s.downcase == version.to_s.downcase}
            .first
          Google::Cloud::Dialogflow.const_get(version_module)::Sessions.new(*args, **kwargs)
        end
      end
    end
  end
end