{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric      #-}
{-# LANGUAGE OverloadedStrings  #-}
{-# LANGUAGE RecordWildCards    #-}
{-# LANGUAGE TypeFamilies       #-}

{-# OPTIONS_GHC -fno-warn-unused-imports #-}
{-# OPTIONS_GHC -fno-warn-unused-binds   #-}
{-# OPTIONS_GHC -fno-warn-unused-matches #-}

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

-- |
-- Module      : Network.AWS.CloudWatch.DescribeAlarmsForMetric
-- Copyright   : (c) 2013-2018 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay+amazonka@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Retrieves the alarms for the specified metric. To filter the results, specify a statistic, period, or unit.
--
--
module Network.AWS.CloudWatch.DescribeAlarmsForMetric
    (
    -- * Creating a Request
      describeAlarmsForMetric
    , DescribeAlarmsForMetric
    -- * Request Lenses
    , dafmPeriod
    , dafmDimensions
    , dafmUnit
    , dafmStatistic
    , dafmExtendedStatistic
    , dafmMetricName
    , dafmNamespace

    -- * Destructuring the Response
    , describeAlarmsForMetricResponse
    , DescribeAlarmsForMetricResponse
    -- * Response Lenses
    , dafmrsMetricAlarms
    , dafmrsResponseStatus
    ) where

import Network.AWS.CloudWatch.Types
import Network.AWS.CloudWatch.Types.Product
import Network.AWS.Lens
import Network.AWS.Prelude
import Network.AWS.Request
import Network.AWS.Response

-- | /See:/ 'describeAlarmsForMetric' smart constructor.
data DescribeAlarmsForMetric = DescribeAlarmsForMetric'
  { _dafmPeriod            :: !(Maybe Nat)
  , _dafmDimensions        :: !(Maybe [Dimension])
  , _dafmUnit              :: !(Maybe StandardUnit)
  , _dafmStatistic         :: !(Maybe Statistic)
  , _dafmExtendedStatistic :: !(Maybe Text)
  , _dafmMetricName        :: !Text
  , _dafmNamespace         :: !Text
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'DescribeAlarmsForMetric' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dafmPeriod' - The period, in seconds, over which the statistic is applied.
--
-- * 'dafmDimensions' - The dimensions associated with the metric. If the metric has any associated dimensions, you must specify them in order for the call to succeed.
--
-- * 'dafmUnit' - The unit for the metric.
--
-- * 'dafmStatistic' - The statistic for the metric, other than percentiles. For percentile statistics, use @ExtendedStatistics@ .
--
-- * 'dafmExtendedStatistic' - The percentile statistic for the metric. Specify a value between p0.0 and p100.
--
-- * 'dafmMetricName' - The name of the metric.
--
-- * 'dafmNamespace' - The namespace of the metric.
describeAlarmsForMetric
    :: Text -- ^ 'dafmMetricName'
    -> Text -- ^ 'dafmNamespace'
    -> DescribeAlarmsForMetric
describeAlarmsForMetric pMetricName_ pNamespace_ =
  DescribeAlarmsForMetric'
    { _dafmPeriod = Nothing
    , _dafmDimensions = Nothing
    , _dafmUnit = Nothing
    , _dafmStatistic = Nothing
    , _dafmExtendedStatistic = Nothing
    , _dafmMetricName = pMetricName_
    , _dafmNamespace = pNamespace_
    }


-- | The period, in seconds, over which the statistic is applied.
dafmPeriod :: Lens' DescribeAlarmsForMetric (Maybe Natural)
dafmPeriod = lens _dafmPeriod (\ s a -> s{_dafmPeriod = a}) . mapping _Nat

-- | The dimensions associated with the metric. If the metric has any associated dimensions, you must specify them in order for the call to succeed.
dafmDimensions :: Lens' DescribeAlarmsForMetric [Dimension]
dafmDimensions = lens _dafmDimensions (\ s a -> s{_dafmDimensions = a}) . _Default . _Coerce

-- | The unit for the metric.
dafmUnit :: Lens' DescribeAlarmsForMetric (Maybe StandardUnit)
dafmUnit = lens _dafmUnit (\ s a -> s{_dafmUnit = a})

-- | The statistic for the metric, other than percentiles. For percentile statistics, use @ExtendedStatistics@ .
dafmStatistic :: Lens' DescribeAlarmsForMetric (Maybe Statistic)
dafmStatistic = lens _dafmStatistic (\ s a -> s{_dafmStatistic = a})

-- | The percentile statistic for the metric. Specify a value between p0.0 and p100.
dafmExtendedStatistic :: Lens' DescribeAlarmsForMetric (Maybe Text)
dafmExtendedStatistic = lens _dafmExtendedStatistic (\ s a -> s{_dafmExtendedStatistic = a})

-- | The name of the metric.
dafmMetricName :: Lens' DescribeAlarmsForMetric Text
dafmMetricName = lens _dafmMetricName (\ s a -> s{_dafmMetricName = a})

-- | The namespace of the metric.
dafmNamespace :: Lens' DescribeAlarmsForMetric Text
dafmNamespace = lens _dafmNamespace (\ s a -> s{_dafmNamespace = a})

instance AWSRequest DescribeAlarmsForMetric where
        type Rs DescribeAlarmsForMetric =
             DescribeAlarmsForMetricResponse
        request = postQuery cloudWatch
        response
          = receiveXMLWrapper "DescribeAlarmsForMetricResult"
              (\ s h x ->
                 DescribeAlarmsForMetricResponse' <$>
                   (x .@? "MetricAlarms" .!@ mempty >>=
                      may (parseXMLList "member"))
                     <*> (pure (fromEnum s)))

instance Hashable DescribeAlarmsForMetric where

instance NFData DescribeAlarmsForMetric where

instance ToHeaders DescribeAlarmsForMetric where
        toHeaders = const mempty

instance ToPath DescribeAlarmsForMetric where
        toPath = const "/"

instance ToQuery DescribeAlarmsForMetric where
        toQuery DescribeAlarmsForMetric'{..}
          = mconcat
              ["Action" =:
                 ("DescribeAlarmsForMetric" :: ByteString),
               "Version" =: ("2010-08-01" :: ByteString),
               "Period" =: _dafmPeriod,
               "Dimensions" =:
                 toQuery (toQueryList "member" <$> _dafmDimensions),
               "Unit" =: _dafmUnit, "Statistic" =: _dafmStatistic,
               "ExtendedStatistic" =: _dafmExtendedStatistic,
               "MetricName" =: _dafmMetricName,
               "Namespace" =: _dafmNamespace]

-- | /See:/ 'describeAlarmsForMetricResponse' smart constructor.
data DescribeAlarmsForMetricResponse = DescribeAlarmsForMetricResponse'
  { _dafmrsMetricAlarms   :: !(Maybe [MetricAlarm])
  , _dafmrsResponseStatus :: !Int
  } deriving (Eq, Read, Show, Data, Typeable, Generic)


-- | Creates a value of 'DescribeAlarmsForMetricResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dafmrsMetricAlarms' - The information for each alarm with the specified metric.
--
-- * 'dafmrsResponseStatus' - -- | The response status code.
describeAlarmsForMetricResponse
    :: Int -- ^ 'dafmrsResponseStatus'
    -> DescribeAlarmsForMetricResponse
describeAlarmsForMetricResponse pResponseStatus_ =
  DescribeAlarmsForMetricResponse'
    {_dafmrsMetricAlarms = Nothing, _dafmrsResponseStatus = pResponseStatus_}


-- | The information for each alarm with the specified metric.
dafmrsMetricAlarms :: Lens' DescribeAlarmsForMetricResponse [MetricAlarm]
dafmrsMetricAlarms = lens _dafmrsMetricAlarms (\ s a -> s{_dafmrsMetricAlarms = a}) . _Default . _Coerce

-- | -- | The response status code.
dafmrsResponseStatus :: Lens' DescribeAlarmsForMetricResponse Int
dafmrsResponseStatus = lens _dafmrsResponseStatus (\ s a -> s{_dafmrsResponseStatus = a})

instance NFData DescribeAlarmsForMetricResponse where