{-# 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.ElasticBeanstalk.DescribeEvents
-- Copyright   : (c) 2013-2015 Brendan Hay
-- License     : Mozilla Public License, v. 2.0.
-- Maintainer  : Brendan Hay <brendan.g.hay@gmail.com>
-- Stability   : auto-generated
-- Portability : non-portable (GHC extensions)
--
-- Returns list of event descriptions matching criteria up to the last 6
-- weeks.
--
-- This action returns the most recent 1,000 events from the specified
-- 'NextToken'.
--
-- /See:/ <http://docs.aws.amazon.com/elasticbeanstalk/latest/api/API_DescribeEvents.html AWS API Reference> for DescribeEvents.
--
-- This operation returns paginated results.
module Network.AWS.ElasticBeanstalk.DescribeEvents
    (
    -- * Creating a Request
      describeEvents
    , DescribeEvents
    -- * Request Lenses
    , deRequestId
    , deTemplateName
    , deStartTime
    , deSeverity
    , deNextToken
    , deVersionLabel
    , deMaxRecords
    , deEnvironmentName
    , deEndTime
    , deApplicationName
    , deEnvironmentId

    -- * Destructuring the Response
    , describeEventsResponse
    , DescribeEventsResponse
    -- * Response Lenses
    , dersNextToken
    , dersEvents
    , dersStatus
    ) where

import           Network.AWS.ElasticBeanstalk.Types
import           Network.AWS.ElasticBeanstalk.Types.Product
import           Network.AWS.Pager
import           Network.AWS.Prelude
import           Network.AWS.Request
import           Network.AWS.Response

-- | This documentation target is not reported in the API reference.
--
-- /See:/ 'describeEvents' smart constructor.
data DescribeEvents = DescribeEvents'
    { _deRequestId       :: !(Maybe Text)
    , _deTemplateName    :: !(Maybe Text)
    , _deStartTime       :: !(Maybe ISO8601)
    , _deSeverity        :: !(Maybe EventSeverity)
    , _deNextToken       :: !(Maybe Text)
    , _deVersionLabel    :: !(Maybe Text)
    , _deMaxRecords      :: !(Maybe Nat)
    , _deEnvironmentName :: !(Maybe Text)
    , _deEndTime         :: !(Maybe ISO8601)
    , _deApplicationName :: !(Maybe Text)
    , _deEnvironmentId   :: !(Maybe Text)
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeEvents' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'deRequestId'
--
-- * 'deTemplateName'
--
-- * 'deStartTime'
--
-- * 'deSeverity'
--
-- * 'deNextToken'
--
-- * 'deVersionLabel'
--
-- * 'deMaxRecords'
--
-- * 'deEnvironmentName'
--
-- * 'deEndTime'
--
-- * 'deApplicationName'
--
-- * 'deEnvironmentId'
describeEvents
    :: DescribeEvents
describeEvents =
    DescribeEvents'
    { _deRequestId = Nothing
    , _deTemplateName = Nothing
    , _deStartTime = Nothing
    , _deSeverity = Nothing
    , _deNextToken = Nothing
    , _deVersionLabel = Nothing
    , _deMaxRecords = Nothing
    , _deEnvironmentName = Nothing
    , _deEndTime = Nothing
    , _deApplicationName = Nothing
    , _deEnvironmentId = Nothing
    }

-- | If specified, AWS Elastic Beanstalk restricts the described events to
-- include only those associated with this request ID.
deRequestId :: Lens' DescribeEvents (Maybe Text)
deRequestId = lens _deRequestId (\ s a -> s{_deRequestId = a});

-- | If specified, AWS Elastic Beanstalk restricts the returned descriptions
-- to those that are associated with this environment configuration.
deTemplateName :: Lens' DescribeEvents (Maybe Text)
deTemplateName = lens _deTemplateName (\ s a -> s{_deTemplateName = a});

-- | If specified, AWS Elastic Beanstalk restricts the returned descriptions
-- to those that occur on or after this time.
deStartTime :: Lens' DescribeEvents (Maybe UTCTime)
deStartTime = lens _deStartTime (\ s a -> s{_deStartTime = a}) . mapping _Time;

-- | If specified, limits the events returned from this call to include only
-- those with the specified severity or higher.
deSeverity :: Lens' DescribeEvents (Maybe EventSeverity)
deSeverity = lens _deSeverity (\ s a -> s{_deSeverity = a});

-- | Pagination token. If specified, the events return the next batch of
-- results.
deNextToken :: Lens' DescribeEvents (Maybe Text)
deNextToken = lens _deNextToken (\ s a -> s{_deNextToken = a});

-- | If specified, AWS Elastic Beanstalk restricts the returned descriptions
-- to those associated with this application version.
deVersionLabel :: Lens' DescribeEvents (Maybe Text)
deVersionLabel = lens _deVersionLabel (\ s a -> s{_deVersionLabel = a});

-- | Specifies the maximum number of events that can be returned, beginning
-- with the most recent event.
deMaxRecords :: Lens' DescribeEvents (Maybe Natural)
deMaxRecords = lens _deMaxRecords (\ s a -> s{_deMaxRecords = a}) . mapping _Nat;

-- | If specified, AWS Elastic Beanstalk restricts the returned descriptions
-- to those associated with this environment.
deEnvironmentName :: Lens' DescribeEvents (Maybe Text)
deEnvironmentName = lens _deEnvironmentName (\ s a -> s{_deEnvironmentName = a});

-- | If specified, AWS Elastic Beanstalk restricts the returned descriptions
-- to those that occur up to, but not including, the 'EndTime'.
deEndTime :: Lens' DescribeEvents (Maybe UTCTime)
deEndTime = lens _deEndTime (\ s a -> s{_deEndTime = a}) . mapping _Time;

-- | If specified, AWS Elastic Beanstalk restricts the returned descriptions
-- to include only those associated with this application.
deApplicationName :: Lens' DescribeEvents (Maybe Text)
deApplicationName = lens _deApplicationName (\ s a -> s{_deApplicationName = a});

-- | If specified, AWS Elastic Beanstalk restricts the returned descriptions
-- to those associated with this environment.
deEnvironmentId :: Lens' DescribeEvents (Maybe Text)
deEnvironmentId = lens _deEnvironmentId (\ s a -> s{_deEnvironmentId = a});

instance AWSPager DescribeEvents where
        page rq rs
          | stop (rs ^. dersNextToken) = Nothing
          | stop (rs ^. dersEvents) = Nothing
          | otherwise =
            Just $ rq & deNextToken .~ rs ^. dersNextToken

instance AWSRequest DescribeEvents where
        type Sv DescribeEvents = ElasticBeanstalk
        type Rs DescribeEvents = DescribeEventsResponse
        request = postQuery
        response
          = receiveXMLWrapper "DescribeEventsResult"
              (\ s h x ->
                 DescribeEventsResponse' <$>
                   (x .@? "NextToken") <*>
                     (x .@? "Events" .!@ mempty >>=
                        may (parseXMLList "member"))
                     <*> (pure (fromEnum s)))

instance ToHeaders DescribeEvents where
        toHeaders = const mempty

instance ToPath DescribeEvents where
        toPath = const "/"

instance ToQuery DescribeEvents where
        toQuery DescribeEvents'{..}
          = mconcat
              ["Action" =: ("DescribeEvents" :: ByteString),
               "Version" =: ("2010-12-01" :: ByteString),
               "RequestId" =: _deRequestId,
               "TemplateName" =: _deTemplateName,
               "StartTime" =: _deStartTime,
               "Severity" =: _deSeverity,
               "NextToken" =: _deNextToken,
               "VersionLabel" =: _deVersionLabel,
               "MaxRecords" =: _deMaxRecords,
               "EnvironmentName" =: _deEnvironmentName,
               "EndTime" =: _deEndTime,
               "ApplicationName" =: _deApplicationName,
               "EnvironmentId" =: _deEnvironmentId]

-- | Result message wrapping a list of event descriptions.
--
-- /See:/ 'describeEventsResponse' smart constructor.
data DescribeEventsResponse = DescribeEventsResponse'
    { _dersNextToken :: !(Maybe Text)
    , _dersEvents    :: !(Maybe [EventDescription])
    , _dersStatus    :: !Int
    } deriving (Eq,Read,Show,Data,Typeable,Generic)

-- | Creates a value of 'DescribeEventsResponse' with the minimum fields required to make a request.
--
-- Use one of the following lenses to modify other fields as desired:
--
-- * 'dersNextToken'
--
-- * 'dersEvents'
--
-- * 'dersStatus'
describeEventsResponse
    :: Int -- ^ 'dersStatus'
    -> DescribeEventsResponse
describeEventsResponse pStatus_ =
    DescribeEventsResponse'
    { _dersNextToken = Nothing
    , _dersEvents = Nothing
    , _dersStatus = pStatus_
    }

-- | If returned, this indicates that there are more results to obtain. Use
-- this token in the next DescribeEvents call to get the next batch of
-- events.
dersNextToken :: Lens' DescribeEventsResponse (Maybe Text)
dersNextToken = lens _dersNextToken (\ s a -> s{_dersNextToken = a});

-- | A list of EventDescription.
dersEvents :: Lens' DescribeEventsResponse [EventDescription]
dersEvents = lens _dersEvents (\ s a -> s{_dersEvents = a}) . _Default . _Coerce;

-- | The response status code.
dersStatus :: Lens' DescribeEventsResponse Int
dersStatus = lens _dersStatus (\ s a -> s{_dersStatus = a});