{-|
Module      : Gargantext.API.Metrics
Description : Server API
Copyright   : (c) CNRS, 2017-Present
License     : AGPL + CECILL v3
Maintainer  : team@gargantext.org
Stability   : experimental
Portability : POSIX

Metrics API

-}

{-# OPTIONS_GHC -fno-warn-orphans #-}

{-# LANGUAGE TypeOperators      #-}

module Gargantext.API.Metrics
    where

import Control.Lens
import qualified Data.Map as Map
import Data.Time (UTCTime)
import Data.Text (Text)
import Servant

import Gargantext.API.HashedResponse
import Gargantext.API.Ngrams
import Gargantext.API.Ngrams.NTree
import Gargantext.API.Prelude (GargServer)
import Gargantext.Core.Types (CorpusId, Limit, ListId, ListType(..))
import Gargantext.Database.Action.Flow
import Gargantext.Database.Admin.Types.Hyperdata (HyperdataList(..))
import Gargantext.Database.Admin.Types.Metrics (ChartMetrics(..), Metric(..), Metrics(..))
import Gargantext.Database.Admin.Types.Node (NodeId)
import Gargantext.Database.Prelude
import Gargantext.Database.Query.Table.Node (defaultList, getNodeWith)
import Gargantext.Database.Query.Table.Node.Error (HasNodeError)
import Gargantext.Database.Query.Table.Node.UpdateOpaleye (updateHyperdata)
import Gargantext.Database.Schema.Node (node_hyperdata)
import Gargantext.Prelude
import Gargantext.Text.Metrics (Scored(..))
import Gargantext.Viz.Chart
import Gargantext.Viz.Types
import qualified Gargantext.Database.Action.Metrics as Metrics

-------------------------------------------------------------
-- | Scatter metrics API
type ScatterAPI = Summary "SepGen IncExc metrics"
                  :> QueryParam  "list"       ListId
                  :> QueryParamR "ngramsType" TabType
                  :> QueryParam  "limit"      Int
                  :> Get '[JSON] (HashedResponse Metrics)
              :<|> Summary "Scatter update"
                  :> QueryParam  "list"       ListId
                  :> QueryParamR "ngramsType" TabType
                  :> QueryParam  "limit"      Int
                  :> Post '[JSON] ()
              :<|> "hash" :>
                     Summary "Scatter Hash"
                  :> QueryParam  "list"       ListId
                  :> QueryParamR "ngramsType" TabType
                  :> Get '[JSON] Text

scatterApi :: NodeId -> GargServer ScatterAPI
scatterApi id' = getScatter id'
            :<|> updateScatter id'
            :<|> getScatterHash id'

getScatter :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> Maybe Limit
  -> m (HashedResponse Metrics)
getScatter cId maybeListId tabType _maybeLimit = do
  listId <- case maybeListId of
    Just lid -> pure lid
    Nothing  -> defaultList cId
  node <- getNodeWith listId (Proxy :: Proxy HyperdataList)
  let HyperdataList { _hl_scatter = mChart } = node ^. node_hyperdata

  chart <- case mChart of
    Just chart -> pure chart
    Nothing    -> do
      updateScatter' cId maybeListId tabType Nothing

  pure $ constructHashedResponse chart

updateScatter :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> Maybe Limit
  -> m ()
updateScatter cId maybeListId tabType maybeLimit = do
  _ <- updateScatter' cId maybeListId tabType maybeLimit
  pure ()

updateScatter' :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> Maybe Limit
  -> m Metrics
updateScatter' cId maybeListId tabType maybeLimit = do
  (ngs', scores) <- Metrics.getMetrics cId maybeListId tabType maybeLimit

  let
    metrics      = map (\(Scored t s1 s2) -> Metric t (log' 5 s1) (log' 2 s2) (listType t ngs')) scores
    log' n x     = 1 + (if x <= 0 then 0 else log $ (10^(n::Int)) * x)
    listType t m = maybe (panic errorMsg) fst $ Map.lookup t m
    errorMsg     = "API.Node.metrics: key absent"

  listId <- case maybeListId of
    Just lid -> pure lid
    Nothing  -> defaultList cId
  node <- getNodeWith listId (Proxy :: Proxy HyperdataList)
  let hl = node ^. node_hyperdata
  _ <- updateHyperdata listId $ hl { _hl_scatter = Just $ Metrics metrics }

  pure $ Metrics metrics

getScatterHash :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> m Text
getScatterHash cId maybeListId tabType = do
  hash <$> getScatter cId maybeListId tabType Nothing


-------------------------------------------------------------
-- | Chart metrics API
type ChartApi = Summary " Chart API"
              :> QueryParam "from" UTCTime
              :> QueryParam "to"   UTCTime
              :> QueryParam  "list"       ListId
              :> QueryParamR "ngramsType" TabType
              :> Get '[JSON] (HashedResponse (ChartMetrics Histo))
        :<|> Summary "Chart update"
                :> QueryParam  "list"       ListId
                :> QueryParamR "ngramsType" TabType
                :> QueryParam  "limit"      Int
                :> Post '[JSON] ()
              :<|> "hash" :>
                     Summary "Chart Hash"
                  :> QueryParam  "list"       ListId
                  :> QueryParamR "ngramsType" TabType
                  :> Get '[JSON] Text

chartApi :: NodeId -> GargServer ChartApi
chartApi id' = getChart id'
          :<|> updateChart id'
          :<|> getChartHash id'
               
-- TODO add start / end
getChart :: FlowCmdM env err m =>
            CorpusId
         -> Maybe UTCTime
         -> Maybe UTCTime
         -> Maybe ListId
         -> TabType
         -> m (HashedResponse (ChartMetrics Histo))
getChart cId _start _end maybeListId tabType = do
  listId <- case maybeListId of
    Just lid -> pure lid
    Nothing  -> defaultList cId
  node <- getNodeWith listId (Proxy :: Proxy HyperdataList)
  let HyperdataList { _hl_chart = mChart } = node ^. node_hyperdata

  chart <- case mChart of
    Just chart -> pure chart
    Nothing    -> do
      updateChart' cId maybeListId tabType Nothing

  pure $ constructHashedResponse chart

updateChart :: HasNodeError err =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> Maybe Limit
  -> Cmd err ()
updateChart cId maybeListId tabType maybeLimit = do
  _ <- updateChart' cId maybeListId tabType maybeLimit
  pure ()

updateChart' :: HasNodeError err =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> Maybe Limit
  -> Cmd err (ChartMetrics Histo)
updateChart' cId maybeListId _tabType _maybeLimit = do
  listId <- case maybeListId of
    Just lid -> pure lid
    Nothing  -> defaultList cId
  node <- getNodeWith listId (Proxy :: Proxy HyperdataList)
  let hl = node ^. node_hyperdata
  h <- histoData cId
  _ <- updateHyperdata listId $ hl { _hl_chart = Just $ ChartMetrics h }

  pure $ ChartMetrics h


getChartHash :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> m Text
getChartHash cId maybeListId tabType = do
  hash <$> getChart cId Nothing Nothing maybeListId tabType
 
-------------------------------------------------------------
-- | Pie metrics API
type PieApi = Summary "Pie Chart"
           :> QueryParam "from" UTCTime
           :> QueryParam "to"   UTCTime
           :> QueryParam  "list"       ListId
           :> QueryParamR "ngramsType" TabType
           :> Get '[JSON] (HashedResponse (ChartMetrics Histo))
        :<|> Summary "Pie Chart update"
                :> QueryParam  "list"       ListId
                :> QueryParamR "ngramsType" TabType
                :> QueryParam  "limit"      Int
                :> Post '[JSON] ()
              :<|> "hash" :>
                     Summary "Pie Hash"
                  :> QueryParam  "list"       ListId
                  :> QueryParamR "ngramsType" TabType
                  :> Get '[JSON] Text

pieApi :: NodeId -> GargServer PieApi
pieApi id' = getPie id'
        :<|> updatePie id'
        :<|> getPieHash id'

getPie :: FlowCmdM env err m
       => CorpusId
       -> Maybe UTCTime
       -> Maybe UTCTime
       -> Maybe ListId
       -> TabType
       -> m (HashedResponse (ChartMetrics Histo))
getPie cId _start _end maybeListId tabType = do
  listId <- case maybeListId of
    Just lid -> pure lid
    Nothing  -> defaultList cId
  node <- getNodeWith listId (Proxy :: Proxy HyperdataList)
  let HyperdataList { _hl_pie = mChart } = node ^. node_hyperdata

  chart <- case mChart of
    Just chart -> pure chart
    Nothing    -> do
      updatePie' cId maybeListId tabType Nothing

  pure $ constructHashedResponse chart

updatePie :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> Maybe Limit
  -> m ()
updatePie cId maybeListId tabType maybeLimit = do
  _ <- updatePie' cId maybeListId tabType maybeLimit
  pure ()

updatePie' :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> Maybe Limit
  -> m (ChartMetrics Histo)
updatePie' cId maybeListId tabType _maybeLimit = do
  listId <- case maybeListId of
    Just lid -> pure lid
    Nothing  -> defaultList cId
  node <- getNodeWith listId (Proxy :: Proxy HyperdataList)
  let hl = node ^. node_hyperdata

  p <- pieData cId (ngramsTypeFromTabType tabType) MapTerm
  _ <- updateHyperdata listId $ hl { _hl_pie = Just $ ChartMetrics p }

  pure $ ChartMetrics p

getPieHash :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> m Text
getPieHash cId maybeListId tabType = do
  hash <$> getPie cId Nothing Nothing maybeListId tabType

-------------------------------------------------------------
-- | Tree metrics API

type TreeApi = Summary " Tree API"
           :> QueryParam "from" UTCTime
           :> QueryParam "to"   UTCTime
           :> QueryParam  "list"       ListId
           :> QueryParamR "ngramsType" TabType
           :> QueryParamR "listType"   ListType
           :> Get '[JSON] (HashedResponse (ChartMetrics [MyTree]))
        :<|> Summary "Tree Chart update"
                :> QueryParam  "list"       ListId
                :> QueryParamR "ngramsType" TabType
                :> QueryParamR "listType"   ListType
                :> Post '[JSON] ()
          :<|> "hash" :>
                  Summary "Tree Hash"
              :> QueryParam  "list"       ListId
              :> QueryParamR "ngramsType" TabType
              :> QueryParamR "listType"   ListType
              :> Get '[JSON] Text

                -- Depending on the Type of the Node, we could post
                -- New documents for a corpus
                -- New map list terms
             -- :<|> "process"  :> MultipartForm MultipartData :> Post '[JSON] Text

treeApi :: NodeId -> GargServer TreeApi
treeApi id' = getTree id'
         :<|> updateTree id'
         :<|> getTreeHash id'

getTree :: FlowCmdM env err m
        => CorpusId
        -> Maybe UTCTime
        -> Maybe UTCTime
        -> Maybe ListId
        -> TabType
        -> ListType
        -> m (HashedResponse (ChartMetrics [MyTree]))
getTree cId _start _end maybeListId tabType listType = do
  listId <- case maybeListId of
    Just lid -> pure lid
    Nothing  -> defaultList cId

  node <- getNodeWith listId (Proxy :: Proxy HyperdataList)
  let HyperdataList { _hl_tree = mChart } = node ^. node_hyperdata

  chart <- case mChart of
    Just chart -> pure chart
    Nothing    -> do
      updateTree' cId maybeListId tabType listType

  pure $ constructHashedResponse chart

updateTree :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> ListType
  -> m ()
updateTree cId maybeListId tabType listType = do
  _ <- updateTree' cId maybeListId tabType listType
  pure ()

updateTree' :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> ListType
  -> m (ChartMetrics [MyTree])
updateTree' cId maybeListId tabType listType = do
  listId <- case maybeListId of
    Just lid -> pure lid
    Nothing  -> defaultList cId

  node <- getNodeWith listId (Proxy :: Proxy HyperdataList)
  let hl = node ^. node_hyperdata
  t <- treeData cId (ngramsTypeFromTabType tabType) listType
  _ <- updateHyperdata listId $ hl { _hl_tree = Just $ ChartMetrics t }

  pure $ ChartMetrics t

getTreeHash :: FlowCmdM env err m =>
  CorpusId
  -> Maybe ListId
  -> TabType
  -> ListType
  -> m Text
getTreeHash cId maybeListId tabType listType = do
  hash <$> getTree cId Nothing Nothing maybeListId tabType listType