{-# 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.ELB.DescribeLoadBalancerPolicyTypes
-- Copyright   : (c) 2013-2023 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Describes the specified load balancer policy types or all load balancer
-- policy types.
--
-- The description of each type indicates how it can be used. For example,
-- some policies can be used only with layer 7 listeners, some policies can
-- be used only with layer 4 listeners, and some policies can be used only
-- with your EC2 instances.
--
-- You can use CreateLoadBalancerPolicy to create a policy configuration
-- for any of these policy types. Then, depending on the policy type, use
-- either SetLoadBalancerPoliciesOfListener or
-- SetLoadBalancerPoliciesForBackendServer to set the policy.
module Amazonka.ELB.DescribeLoadBalancerPolicyTypes
  ( -- * Creating a Request
    DescribeLoadBalancerPolicyTypes (..),
    newDescribeLoadBalancerPolicyTypes,

    -- * Request Lenses
    describeLoadBalancerPolicyTypes_policyTypeNames,

    -- * Destructuring the Response
    DescribeLoadBalancerPolicyTypesResponse (..),
    newDescribeLoadBalancerPolicyTypesResponse,

    -- * Response Lenses
    describeLoadBalancerPolicyTypesResponse_policyTypeDescriptions,
    describeLoadBalancerPolicyTypesResponse_httpStatus,
  )
where

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

-- | Contains the parameters for DescribeLoadBalancerPolicyTypes.
--
-- /See:/ 'newDescribeLoadBalancerPolicyTypes' smart constructor.
data DescribeLoadBalancerPolicyTypes = DescribeLoadBalancerPolicyTypes'
  { -- | The names of the policy types. If no names are specified, describes all
    -- policy types defined by Elastic Load Balancing.
    policyTypeNames :: Prelude.Maybe [Prelude.Text]
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeLoadBalancerPolicyTypes' 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:
--
-- 'policyTypeNames', 'describeLoadBalancerPolicyTypes_policyTypeNames' - The names of the policy types. If no names are specified, describes all
-- policy types defined by Elastic Load Balancing.
newDescribeLoadBalancerPolicyTypes ::
  DescribeLoadBalancerPolicyTypes
newDescribeLoadBalancerPolicyTypes =
  DescribeLoadBalancerPolicyTypes'
    { policyTypeNames =
        Prelude.Nothing
    }

-- | The names of the policy types. If no names are specified, describes all
-- policy types defined by Elastic Load Balancing.
describeLoadBalancerPolicyTypes_policyTypeNames :: Lens.Lens' DescribeLoadBalancerPolicyTypes (Prelude.Maybe [Prelude.Text])
describeLoadBalancerPolicyTypes_policyTypeNames = Lens.lens (\DescribeLoadBalancerPolicyTypes' {policyTypeNames} -> policyTypeNames) (\s@DescribeLoadBalancerPolicyTypes' {} a -> s {policyTypeNames = a} :: DescribeLoadBalancerPolicyTypes) Prelude.. Lens.mapping Lens.coerced

instance
  Core.AWSRequest
    DescribeLoadBalancerPolicyTypes
  where
  type
    AWSResponse DescribeLoadBalancerPolicyTypes =
      DescribeLoadBalancerPolicyTypesResponse
  request overrides =
    Request.postQuery (overrides defaultService)
  response =
    Response.receiveXMLWrapper
      "DescribeLoadBalancerPolicyTypesResult"
      ( \s h x ->
          DescribeLoadBalancerPolicyTypesResponse'
            Prelude.<$> ( x
                            Data..@? "PolicyTypeDescriptions"
                            Core..!@ Prelude.mempty
                            Prelude.>>= Core.may (Data.parseXMLList "member")
                        )
            Prelude.<*> (Prelude.pure (Prelude.fromEnum s))
      )

instance
  Prelude.Hashable
    DescribeLoadBalancerPolicyTypes
  where
  hashWithSalt
    _salt
    DescribeLoadBalancerPolicyTypes' {..} =
      _salt `Prelude.hashWithSalt` policyTypeNames

instance
  Prelude.NFData
    DescribeLoadBalancerPolicyTypes
  where
  rnf DescribeLoadBalancerPolicyTypes' {..} =
    Prelude.rnf policyTypeNames

instance
  Data.ToHeaders
    DescribeLoadBalancerPolicyTypes
  where
  toHeaders = Prelude.const Prelude.mempty

instance Data.ToPath DescribeLoadBalancerPolicyTypes where
  toPath = Prelude.const "/"

instance Data.ToQuery DescribeLoadBalancerPolicyTypes where
  toQuery DescribeLoadBalancerPolicyTypes' {..} =
    Prelude.mconcat
      [ "Action"
          Data.=: ( "DescribeLoadBalancerPolicyTypes" ::
                      Prelude.ByteString
                  ),
        "Version"
          Data.=: ("2012-06-01" :: Prelude.ByteString),
        "PolicyTypeNames"
          Data.=: Data.toQuery
            ( Data.toQueryList "member"
                Prelude.<$> policyTypeNames
            )
      ]

-- | Contains the output of DescribeLoadBalancerPolicyTypes.
--
-- /See:/ 'newDescribeLoadBalancerPolicyTypesResponse' smart constructor.
data DescribeLoadBalancerPolicyTypesResponse = DescribeLoadBalancerPolicyTypesResponse'
  { -- | Information about the policy types.
    policyTypeDescriptions :: Prelude.Maybe [PolicyTypeDescription],
    -- | The response's http status code.
    httpStatus :: Prelude.Int
  }
  deriving (Prelude.Eq, Prelude.Read, Prelude.Show, Prelude.Generic)

-- |
-- Create a value of 'DescribeLoadBalancerPolicyTypesResponse' 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:
--
-- 'policyTypeDescriptions', 'describeLoadBalancerPolicyTypesResponse_policyTypeDescriptions' - Information about the policy types.
--
-- 'httpStatus', 'describeLoadBalancerPolicyTypesResponse_httpStatus' - The response's http status code.
newDescribeLoadBalancerPolicyTypesResponse ::
  -- | 'httpStatus'
  Prelude.Int ->
  DescribeLoadBalancerPolicyTypesResponse
newDescribeLoadBalancerPolicyTypesResponse
  pHttpStatus_ =
    DescribeLoadBalancerPolicyTypesResponse'
      { policyTypeDescriptions =
          Prelude.Nothing,
        httpStatus = pHttpStatus_
      }

-- | Information about the policy types.
describeLoadBalancerPolicyTypesResponse_policyTypeDescriptions :: Lens.Lens' DescribeLoadBalancerPolicyTypesResponse (Prelude.Maybe [PolicyTypeDescription])
describeLoadBalancerPolicyTypesResponse_policyTypeDescriptions = Lens.lens (\DescribeLoadBalancerPolicyTypesResponse' {policyTypeDescriptions} -> policyTypeDescriptions) (\s@DescribeLoadBalancerPolicyTypesResponse' {} a -> s {policyTypeDescriptions = a} :: DescribeLoadBalancerPolicyTypesResponse) Prelude.. Lens.mapping Lens.coerced

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

instance
  Prelude.NFData
    DescribeLoadBalancerPolicyTypesResponse
  where
  rnf DescribeLoadBalancerPolicyTypesResponse' {..} =
    Prelude.rnf policyTypeDescriptions
      `Prelude.seq` Prelude.rnf httpStatus