{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE StrictData #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE NoImplicitPrelude #-}
{-# OPTIONS_GHC -fno-warn-unused-binds #-}
{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

-- Derived from AWS service descriptions, licensed under Apache 2.0.

-- |
-- Module      : Amazonka.PersonalizeRuntime.GetRecommendations
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns a list of recommended items. For campaigns, the campaign\'s
-- Amazon Resource Name (ARN) is required and the required user and item
-- input depends on the recipe type used to create the solution backing the
-- campaign as follows:
--
-- -   USER_PERSONALIZATION - @userId@ required, @itemId@ not used
--
-- -   RELATED_ITEMS - @itemId@ required, @userId@ not used
--
-- Campaigns that are backed by a solution created using a recipe of type
-- PERSONALIZED_RANKING use the API.
--
-- For recommenders, the recommender\'s ARN is required and the required
-- item and user input depends on the use case (domain-based recipe)
-- backing the recommender. For information on use case requirements see
-- <https://docs.aws.amazon.com/personalize/latest/dg/domain-use-cases.html Choosing recommender use cases>.
module Amazonka.PersonalizeRuntime.GetRecommendations
  ( -- * Creating a Request
    GetRecommendations (..),
    newGetRecommendations,

    -- * Request Lenses
    getRecommendations_campaignArn,
    getRecommendations_context,
    getRecommendations_filterArn,
    getRecommendations_filterValues,
    getRecommendations_itemId,
    getRecommendations_numResults,
    getRecommendations_promotions,
    getRecommendations_recommenderArn,
    getRecommendations_userId,

    -- * Destructuring the Response
    GetRecommendationsResponse (..),
    newGetRecommendationsResponse,

    -- * Response Lenses
    getRecommendationsResponse_itemList,
    getRecommendationsResponse_recommendationId,
    getRecommendationsResponse_httpStatus,
  )
where

import qualified Amazonka.Core as Core
import qualified Amazonka.Core.Lens.Internal as Lens
import qualified Amazonka.Data as Data
import Amazonka.PersonalizeRuntime.Types
import qualified Amazonka.Prelude as Prelude
import qualified Amazonka.Request as Request
import qualified Amazonka.Response as Response

-- | /See:/ 'newGetRecommendations' smart constructor.
data GetRecommendations = GetRecommendations'
  { -- | The Amazon Resource Name (ARN) of the campaign to use for getting
    -- recommendations.
    campaignArn :: Prelude.Maybe Prelude.Text,
    -- | The contextual metadata to use when getting recommendations. Contextual
    -- metadata includes any interaction information that might be relevant
    -- when getting a user\'s recommendations, such as the user\'s current
    -- location or device type.
    context :: Prelude.Maybe (Prelude.HashMap Prelude.Text (Data.Sensitive Prelude.Text)),
    -- | The ARN of the filter to apply to the returned recommendations. For more
    -- information, see
    -- <https://docs.aws.amazon.com/personalize/latest/dg/filter.html Filtering Recommendations>.
    --
    -- When using this parameter, be sure the filter resource is @ACTIVE@.
    filterArn :: Prelude.Maybe Prelude.Text,
    -- | The values to use when filtering recommendations. For each placeholder
    -- parameter in your filter expression, provide the parameter name (in
    -- matching case) as a key and the filter value(s) as the corresponding
    -- value. Separate multiple values for one parameter with a comma.
    --
    -- For filter expressions that use an @INCLUDE@ element to include items,
    -- you must provide values for all parameters that are defined in the
    -- expression. For filters with expressions that use an @EXCLUDE@ element
    -- to exclude items, you can omit the @filter-values@.In this case, Amazon
    -- Personalize doesn\'t use that portion of the expression to filter
    -- recommendations.
    --
    -- For more information, see
    -- <https://docs.aws.amazon.com/personalize/latest/dg/filter.html Filtering recommendations and user segments>.
    filterValues :: Prelude.Maybe (Prelude.HashMap Prelude.Text (Data.Sensitive Prelude.Text)),
    -- | The item ID to provide recommendations for.
    --
    -- Required for @RELATED_ITEMS@ recipe type.
    itemId :: Prelude.Maybe Prelude.Text,
    -- | The number of results to return. The default is 25. The maximum is 500.
    numResults :: Prelude.Maybe Prelude.Natural,
    -- | The promotions to apply to the recommendation request. A promotion
    -- defines additional business rules that apply to a configurable subset of
    -- recommended items.
    promotions :: Prelude.Maybe [Promotion],
    -- | The Amazon Resource Name (ARN) of the recommender to use to get
    -- recommendations. Provide a recommender ARN if you created a Domain
    -- dataset group with a recommender for a domain use case.
    recommenderArn :: Prelude.Maybe Prelude.Text,
    -- | The user ID to provide recommendations for.
    --
    -- Required for @USER_PERSONALIZATION@ recipe type.
    userId :: Prelude.Maybe Prelude.Text
  }
  deriving (Prelude.Eq, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetRecommendations' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'campaignArn', 'getRecommendations_campaignArn' - The Amazon Resource Name (ARN) of the campaign to use for getting
-- recommendations.
--
-- 'context', 'getRecommendations_context' - The contextual metadata to use when getting recommendations. Contextual
-- metadata includes any interaction information that might be relevant
-- when getting a user\'s recommendations, such as the user\'s current
-- location or device type.
--
-- 'filterArn', 'getRecommendations_filterArn' - The ARN of the filter to apply to the returned recommendations. For more
-- information, see
-- <https://docs.aws.amazon.com/personalize/latest/dg/filter.html Filtering Recommendations>.
--
-- When using this parameter, be sure the filter resource is @ACTIVE@.
--
-- 'filterValues', 'getRecommendations_filterValues' - The values to use when filtering recommendations. For each placeholder
-- parameter in your filter expression, provide the parameter name (in
-- matching case) as a key and the filter value(s) as the corresponding
-- value. Separate multiple values for one parameter with a comma.
--
-- For filter expressions that use an @INCLUDE@ element to include items,
-- you must provide values for all parameters that are defined in the
-- expression. For filters with expressions that use an @EXCLUDE@ element
-- to exclude items, you can omit the @filter-values@.In this case, Amazon
-- Personalize doesn\'t use that portion of the expression to filter
-- recommendations.
--
-- For more information, see
-- <https://docs.aws.amazon.com/personalize/latest/dg/filter.html Filtering recommendations and user segments>.
--
-- 'itemId', 'getRecommendations_itemId' - The item ID to provide recommendations for.
--
-- Required for @RELATED_ITEMS@ recipe type.
--
-- 'numResults', 'getRecommendations_numResults' - The number of results to return. The default is 25. The maximum is 500.
--
-- 'promotions', 'getRecommendations_promotions' - The promotions to apply to the recommendation request. A promotion
-- defines additional business rules that apply to a configurable subset of
-- recommended items.
--
-- 'recommenderArn', 'getRecommendations_recommenderArn' - The Amazon Resource Name (ARN) of the recommender to use to get
-- recommendations. Provide a recommender ARN if you created a Domain
-- dataset group with a recommender for a domain use case.
--
-- 'userId', 'getRecommendations_userId' - The user ID to provide recommendations for.
--
-- Required for @USER_PERSONALIZATION@ recipe type.
newGetRecommendations ::
  GetRecommendations
newGetRecommendations =
  GetRecommendations'
    { campaignArn = Prelude.Nothing,
      context = Prelude.Nothing,
      filterArn = Prelude.Nothing,
      filterValues = Prelude.Nothing,
      itemId = Prelude.Nothing,
      numResults = Prelude.Nothing,
      promotions = Prelude.Nothing,
      recommenderArn = Prelude.Nothing,
      userId = Prelude.Nothing
    }

-- | The Amazon Resource Name (ARN) of the campaign to use for getting
-- recommendations.
getRecommendations_campaignArn :: Lens.Lens' GetRecommendations (Prelude.Maybe Prelude.Text)
getRecommendations_campaignArn = Lens.lens (\GetRecommendations' {campaignArn} -> campaignArn) (\s@GetRecommendations' {} a -> s {campaignArn = a} :: GetRecommendations)

-- | The contextual metadata to use when getting recommendations. Contextual
-- metadata includes any interaction information that might be relevant
-- when getting a user\'s recommendations, such as the user\'s current
-- location or device type.
getRecommendations_context :: Lens.Lens' GetRecommendations (Prelude.Maybe (Prelude.HashMap Prelude.Text Prelude.Text))
getRecommendations_context = Lens.lens (\GetRecommendations' {context} -> context) (\s@GetRecommendations' {} a -> s {context = a} :: GetRecommendations) Prelude.. Lens.mapping Lens.coerced

-- | The ARN of the filter to apply to the returned recommendations. For more
-- information, see
-- <https://docs.aws.amazon.com/personalize/latest/dg/filter.html Filtering Recommendations>.
--
-- When using this parameter, be sure the filter resource is @ACTIVE@.
getRecommendations_filterArn :: Lens.Lens' GetRecommendations (Prelude.Maybe Prelude.Text)
getRecommendations_filterArn = Lens.lens (\GetRecommendations' {filterArn} -> filterArn) (\s@GetRecommendations' {} a -> s {filterArn = a} :: GetRecommendations)

-- | The values to use when filtering recommendations. For each placeholder
-- parameter in your filter expression, provide the parameter name (in
-- matching case) as a key and the filter value(s) as the corresponding
-- value. Separate multiple values for one parameter with a comma.
--
-- For filter expressions that use an @INCLUDE@ element to include items,
-- you must provide values for all parameters that are defined in the
-- expression. For filters with expressions that use an @EXCLUDE@ element
-- to exclude items, you can omit the @filter-values@.In this case, Amazon
-- Personalize doesn\'t use that portion of the expression to filter
-- recommendations.
--
-- For more information, see
-- <https://docs.aws.amazon.com/personalize/latest/dg/filter.html Filtering recommendations and user segments>.
getRecommendations_filterValues :: Lens.Lens' GetRecommendations (Prelude.Maybe (Prelude.HashMap Prelude.Text Prelude.Text))
getRecommendations_filterValues = Lens.lens (\GetRecommendations' {filterValues} -> filterValues) (\s@GetRecommendations' {} a -> s {filterValues = a} :: GetRecommendations) Prelude.. Lens.mapping Lens.coerced

-- | The item ID to provide recommendations for.
--
-- Required for @RELATED_ITEMS@ recipe type.
getRecommendations_itemId :: Lens.Lens' GetRecommendations (Prelude.Maybe Prelude.Text)
getRecommendations_itemId = Lens.lens (\GetRecommendations' {itemId} -> itemId) (\s@GetRecommendations' {} a -> s {itemId = a} :: GetRecommendations)

-- | The number of results to return. The default is 25. The maximum is 500.
getRecommendations_numResults :: Lens.Lens' GetRecommendations (Prelude.Maybe Prelude.Natural)
getRecommendations_numResults = Lens.lens (\GetRecommendations' {numResults} -> numResults) (\s@GetRecommendations' {} a -> s {numResults = a} :: GetRecommendations)

-- | The promotions to apply to the recommendation request. A promotion
-- defines additional business rules that apply to a configurable subset of
-- recommended items.
getRecommendations_promotions :: Lens.Lens' GetRecommendations (Prelude.Maybe [Promotion])
getRecommendations_promotions = Lens.lens (\GetRecommendations' {promotions} -> promotions) (\s@GetRecommendations' {} a -> s {promotions = a} :: GetRecommendations) Prelude.. Lens.mapping Lens.coerced

-- | The Amazon Resource Name (ARN) of the recommender to use to get
-- recommendations. Provide a recommender ARN if you created a Domain
-- dataset group with a recommender for a domain use case.
getRecommendations_recommenderArn :: Lens.Lens' GetRecommendations (Prelude.Maybe Prelude.Text)
getRecommendations_recommenderArn = Lens.lens (\GetRecommendations' {recommenderArn} -> recommenderArn) (\s@GetRecommendations' {} a -> s {recommenderArn = a} :: GetRecommendations)

-- | The user ID to provide recommendations for.
--
-- Required for @USER_PERSONALIZATION@ recipe type.
getRecommendations_userId :: Lens.Lens' GetRecommendations (Prelude.Maybe Prelude.Text)
getRecommendations_userId = Lens.lens (\GetRecommendations' {userId} -> userId) (\s@GetRecommendations' {} a -> s {userId = a} :: GetRecommendations)

instance Core.AWSRequest GetRecommendations where
  type
    AWSResponse GetRecommendations =
      GetRecommendationsResponse
  request overrides =
    Request.postJSON (overrides defaultService)
  response =
    Response.receiveJSON
      ( \s h x ->
          GetRecommendationsResponse'
            Prelude.<$> (x Data..?> "itemList" Core..!@ Prelude.mempty)
            Prelude.<*> (x Data..?> "recommendationId")
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance Prelude.Hashable GetRecommendations where
  hashWithSalt _salt GetRecommendations' {..} =
    _salt
      `Prelude.hashWithSalt` campaignArn
      `Prelude.hashWithSalt` context
      `Prelude.hashWithSalt` filterArn
      `Prelude.hashWithSalt` filterValues
      `Prelude.hashWithSalt` itemId
      `Prelude.hashWithSalt` numResults
      `Prelude.hashWithSalt` promotions
      `Prelude.hashWithSalt` recommenderArn
      `Prelude.hashWithSalt` userId

instance Prelude.NFData GetRecommendations where
  rnf GetRecommendations' {..} =
    Prelude.rnf campaignArn
      `Prelude.seq` Prelude.rnf context
      `Prelude.seq` Prelude.rnf filterArn
      `Prelude.seq` Prelude.rnf filterValues
      `Prelude.seq` Prelude.rnf itemId
      `Prelude.seq` Prelude.rnf numResults
      `Prelude.seq` Prelude.rnf promotions
      `Prelude.seq` Prelude.rnf recommenderArn
      `Prelude.seq` Prelude.rnf userId

instance Data.ToHeaders GetRecommendations where
  toHeaders =
    Prelude.const
      ( Prelude.mconcat
          [ "Content-Type"
              Data.=# ( "application/x-amz-json-1.1" ::
                          Prelude.ByteString
                      )
          ]
      )

instance Data.ToJSON GetRecommendations where
  toJSON GetRecommendations' {..} =
    Data.object
      ( Prelude.catMaybes
          [ ("campaignArn" Data..=) Prelude.<$> campaignArn,
            ("context" Data..=) Prelude.<$> context,
            ("filterArn" Data..=) Prelude.<$> filterArn,
            ("filterValues" Data..=) Prelude.<$> filterValues,
            ("itemId" Data..=) Prelude.<$> itemId,
            ("numResults" Data..=) Prelude.<$> numResults,
            ("promotions" Data..=) Prelude.<$> promotions,
            ("recommenderArn" Data..=)
              Prelude.<$> recommenderArn,
            ("userId" Data..=) Prelude.<$> userId
          ]
      )

instance Data.ToPath GetRecommendations where
  toPath = Prelude.const "/recommendations"

instance Data.ToQuery GetRecommendations where
  toQuery = Prelude.const Prelude.mempty

-- | /See:/ 'newGetRecommendationsResponse' smart constructor.
data GetRecommendationsResponse = GetRecommendationsResponse'
  { -- | A list of recommendations sorted in descending order by prediction
    -- score. There can be a maximum of 500 items in the list.
    itemList :: Prelude.Maybe [PredictedItem],
    -- | The ID of the recommendation.
    recommendationId :: Prelude.Maybe Prelude.Text,
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'GetRecommendationsResponse' with all optional fields omitted.
--
-- Use <https://hackage.haskell.org/package/generic-lens generic-lens> or <https://hackage.haskell.org/package/optics optics> to modify other optional fields.
--
-- The following record fields are available, with the corresponding lenses provided
-- for backwards compatibility:
--
-- 'itemList', 'getRecommendationsResponse_itemList' - A list of recommendations sorted in descending order by prediction
-- score. There can be a maximum of 500 items in the list.
--
-- 'recommendationId', 'getRecommendationsResponse_recommendationId' - The ID of the recommendation.
--
-- 'httpStatus', 'getRecommendationsResponse_httpStatus' - The response's http status code.
newGetRecommendationsResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  GetRecommendationsResponse
newGetRecommendationsResponse pHttpStatus_ =
  GetRecommendationsResponse'
    { itemList =
        Prelude.Nothing,
      recommendationId = Prelude.Nothing,
      httpStatus = pHttpStatus_
    }

-- | A list of recommendations sorted in descending order by prediction
-- score. There can be a maximum of 500 items in the list.
getRecommendationsResponse_itemList :: Lens.Lens' GetRecommendationsResponse (Prelude.Maybe [PredictedItem])
getRecommendationsResponse_itemList = Lens.lens (\GetRecommendationsResponse' {itemList} -> itemList) (\s@GetRecommendationsResponse' {} a -> s {itemList = a} :: GetRecommendationsResponse) Prelude.. Lens.mapping Lens.coerced

-- | The ID of the recommendation.
getRecommendationsResponse_recommendationId :: Lens.Lens' GetRecommendationsResponse (Prelude.Maybe Prelude.Text)
getRecommendationsResponse_recommendationId = Lens.lens (\GetRecommendationsResponse' {recommendationId} -> recommendationId) (\s@GetRecommendationsResponse' {} a -> s {recommendationId = a} :: GetRecommendationsResponse)

-- | The response's http status code.
getRecommendationsResponse_httpStatus :: Lens.Lens' GetRecommendationsResponse Prelude.Int
getRecommendationsResponse_httpStatus = Lens.lens (\GetRecommendationsResponse' {httpStatus} -> httpStatus) (\s@GetRecommendationsResponse' {} a -> s {httpStatus = a} :: GetRecommendationsResponse)

instance Prelude.NFData GetRecommendationsResponse where
  rnf GetRecommendationsResponse' {..} =
    Prelude.rnf itemList
      `Prelude.seq` Prelude.rnf recommendationId
      `Prelude.seq` Prelude.rnf httpStatus