content: {-| Converts a configuration state into a Ssconf map.
  
  As TemplateHaskell require that splices be defined in a separate
  module, we combine all the TemplateHaskell functionality that HTools
  needs in this module (except the one for unittests).
  
  -}
  
  {-
  
  Copyright (C) 2014 Google Inc.
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
  met:
  
  1. Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
  
  2. Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  -}
  
  module Ganeti.WConfd.Ssconf
    ( SSConf(..)
    , emptySSConf
    , mkSSConf
    ) where
  
  import Control.Arrow ((&&&), (***), first)
  import qualified Data.ByteString.UTF8 as UTF8
  import Data.Foldable (Foldable(..), toList)
  import Data.List (partition)
  import Data.Maybe (mapMaybe)
  import qualified Data.Map as M
  import qualified Text.JSON as J
  
  import Ganeti.BasicTypes
  import Ganeti.Config
  import Ganeti.Constants
  import Ganeti.JSON (fromContainer, lookupContainer)
  import Ganeti.Objects
  import Ganeti.Ssconf
  import Ganeti.Utils
  import Ganeti.Types
  
  eqPair :: (String, String) -> String
  eqPair (x, y) = x ++ "=" ++ y
  
  mkSSConfHvparams :: Cluster -> [(Hypervisor, [String])]
  mkSSConfHvparams cluster = map (id &&& hvparams) [minBound..maxBound]
    where
      hvparams :: Hypervisor -> [String]
      hvparams h = maybe [] hvparamsStrings
                   $ lookupContainer Nothing h (clusterHvparams cluster)
  
      -- | Convert a collection of hypervisor parameters to strings in the form
      -- @key=value@.
      hvparamsStrings :: HvParams -> [String]
      hvparamsStrings =
        map (eqPair . (UTF8.toString *** hvparamShow)) . M.toList . fromContainer
  
      -- | Convert a hypervisor parameter in its JSON representation to a String.
      -- Strings, numbers and booleans are just printed (without quotes), booleans
      -- printed as @True@/@False@ and other JSON values (should they exist) as
      -- their JSON representations.
      hvparamShow :: J.JSValue -> String
      hvparamShow (J.JSString s) = J.fromJSString s
      hvparamShow (J.JSRational _ r) = J.showJSRational r []
      hvparamShow (J.JSBool b) = show b
      hvparamShow x = J.encode x
  
  mkSSConf :: ConfigData -> SSConf
  mkSSConf cdata = SSConf . M.fromList $
      [ (SSClusterName, return $ clusterClusterName cluster)
      , (SSClusterTags, toList . unTagSet $ tagsOf cluster)
      , (SSFileStorageDir, return $ clusterFileStorageDir cluster)
      , (SSSharedFileStorageDir, return $ clusterSharedFileStorageDir cluster)
      , (SSGlusterStorageDir, return $ clusterGlusterStorageDir cluster)
      , (SSMasterCandidates, mapLines nodeName mcs)
      , (SSMasterCandidatesIps, mapLines nodePrimaryIp mcs)
      , (SSMasterCandidatesCerts, mapLines eqPair . toPairs
                                  . clusterCandidateCerts $ cluster)
      , (SSMasterIp, return $ clusterMasterIp cluster)
      , (SSMasterNetdev, return $ clusterMasterNetdev cluster)
      , (SSMasterNetmask, return . show $ clusterMasterNetmask cluster)
      , (SSMasterNode, return
                       . genericResult (const "NO MASTER") nodeName
                       . getNode cdata $ clusterMasterNode cluster)
      , (SSNodeList, mapLines nodeName nodes)
      , (SSNodePrimaryIps, mapLines (spcPair . (nodeName &&& nodePrimaryIp))
                                    nodes )
      , (SSNodeSecondaryIps, mapLines (spcPair . (nodeName &&& nodeSecondaryIp))
                                      nodes )
      , (SSNodeVmCapable,  mapLines (eqPair . (nodeName &&& show . nodeVmCapable))
                                    nodes)
      , (SSOfflineNodes, mapLines nodeName offline )
      , (SSOnlineNodes, mapLines nodeName online )
      , (SSPrimaryIpFamily, return . show . ipFamilyToRaw
                            . clusterPrimaryIpFamily $ cluster)
      , (SSInstanceList, niceSort . mapMaybe instName
                         . toList . configInstances $ cdata)
      , (SSReleaseVersion, return releaseVersion)
      , (SSHypervisorList, mapLines hypervisorToRaw
                           . clusterEnabledHypervisors $ cluster)
      , (SSMaintainNodeHealth, return . show . clusterMaintainNodeHealth
                               $ cluster)
      , (SSUidPool, mapLines formatUidRange . clusterUidPool $ cluster)
      , (SSNodegroups, mapLines (spcPair . (uuidOf &&& groupName))
                       nodeGroups)
      , (SSNetworks, mapLines (spcPair . (uuidOf
                                          &&& (fromNonEmpty . networkName)))
                     . configNetworks $ cdata)
      , (SSEnabledUserShutdown, return . show . clusterEnabledUserShutdown
                                $ cluster)
      , (SSSshPorts, mapLines (eqPair . (nodeName
                                         &&& getSshPort cdata)) nodes)
      ] ++
      map (first hvparamsSSKey) (mkSSConfHvparams cluster)
    where
      mapLines :: (Foldable f) => (a -> String) -> f a -> [String]
      mapLines f = map f . toList
      spcPair (x, y) = x ++ " " ++ y
      toPairs = M.assocs . M.mapKeys UTF8.toString . fromContainer
  
      cluster = configCluster cdata
      mcs = getMasterOrCandidates cdata
      nodes = niceSortKey nodeName . toList $ configNodes cdata
      (offline, online) = partition nodeOffline nodes
      nodeGroups = niceSortKey groupName . toList $ configNodegroups cdata
  
      -- This will return the empty string only for the situation where the
      -- configuration is corrupted and no nodegroup can be found for that node.
      getSshPort :: ConfigData -> Node -> String
      getSshPort cfg node = maybe "" (show . ndpSshPort)
                            $ getNodeNdParams cfg node
  