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

Count API part of Gargantext.
-}

{-# LANGUAGE TemplateHaskell    #-}
{-# LANGUAGE TypeOperators      #-}
{-# LANGUAGE DeriveAnyClass     #-}

module Gargantext.API.Search
      where

import Data.Aeson hiding (defaultTaggedObject)
import Data.List (concat)
import Data.Maybe (fromMaybe)
import Data.Swagger hiding (fieldLabelModifier, Contact)
import Data.Text (Text)
import Data.Time (UTCTime)
import GHC.Generics (Generic)
import Gargantext.API.Prelude (GargServer)
import Gargantext.Core.Utils.Prefix (unPrefixSwagger, unCapitalize, dropPrefix)
import Gargantext.Database.Action.Flow.Pairing (isPairedWith)
import Gargantext.Database.Action.Search
import Gargantext.Database.Admin.Types.Hyperdata (HyperdataContact(..), HyperdataDocument(..), ContactWho(..))
import Gargantext.Database.Admin.Types.Hyperdata.Contact (_cw_organization)
import Gargantext.Database.Admin.Types.Node
import Gargantext.Database.Query.Facet
import qualified Gargantext.Defaults as Defaults
import Gargantext.Prelude
import Gargantext.Utils.Aeson (defaultTaggedObject)
import Servant
import Test.QuickCheck (elements)
import Test.QuickCheck.Arbitrary
import qualified Data.Text as Text

-----------------------------------------------------------------------
-- TODO-ACCESS: CanSearch? or is it part of CanGetNode
-- TODO-EVENTS: No event, this is a read-only query.
type API results = Summary "Search endpoint"
                 :> ReqBody '[JSON] SearchQuery
                 :> QueryParam "offset" Int
                 :> QueryParam "limit"  Int
                 :> QueryParam "order"  OrderBy
                 :> Post '[JSON] results
-----------------------------------------------------------------------
-- | Api search function
api :: NodeId -> GargServer (API SearchResult)

api nId (SearchQuery q SearchDoc) o l order =
  SearchResult <$> SearchResultDoc
               <$> map (toRow nId)
               <$> searchInCorpus nId False (concat q) o l order

api nId (SearchQuery q SearchContact) o l order = do
  printDebug "isPairedWith" nId
  aIds <- isPairedWith nId NodeAnnuaire
  -- TODO if paired with several corpus
  case head aIds of
    Nothing  -> pure $ SearchResult
              $ SearchNoResult "[G.A.Search] pair corpus with an Annuaire"
    Just aId -> SearchResult
            <$> SearchResultContact
            <$> map (toRow aId)
            <$> searchInCorpusWithContacts nId aId (concat q) o l order

api _nId (SearchQuery _q SearchDocWithNgrams) _o _l _order = undefined

-----------------------------------------------------------------------
-----------------------------------------------------------------------
-- | Main Types
-----------------------------------------------------------------------
data SearchType = SearchDoc | SearchContact | SearchDocWithNgrams
  deriving (Generic)
instance FromJSON SearchType where
  parseJSON = genericParseJSON (defaultOptions { sumEncoding = ObjectWithSingleField })
instance ToJSON SearchType where
  toJSON = genericToJSON (defaultOptions { sumEncoding = ObjectWithSingleField })
instance ToSchema SearchType
instance Arbitrary SearchType where
  arbitrary = elements [SearchDoc, SearchContact]

-----------------------------------------------------------------------
data SearchQuery =
  SearchQuery { query    :: ![[Text]]
              , expected :: !SearchType
              }
    deriving (Generic)
instance FromJSON SearchQuery where
  parseJSON = genericParseJSON defaultOptions
instance ToJSON SearchQuery where
  toJSON = genericToJSON defaultOptions
instance ToSchema SearchQuery
{-
  where
    declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "")
-}

instance Arbitrary SearchQuery where
  arbitrary = elements [SearchQuery [["electrodes"]] SearchDoc]
  -- arbitrary = elements [SearchQuery "electrodes" 1 ] --SearchDoc]
-----------------------------------------------------------------------
data SearchResult =
  SearchResult { result :: !SearchResultTypes}
    deriving (Generic)

instance FromJSON SearchResult where
  parseJSON = genericParseJSON defaultOptions

instance ToJSON SearchResult where
  toJSON = genericToJSON defaultOptions

instance ToSchema SearchResult
{-
  where
    declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "")
-}

instance Arbitrary SearchResult where
  arbitrary = SearchResult <$> arbitrary


data SearchResultTypes =
    SearchResultDoc { docs     :: ![Row] }
  | SearchResultContact  { contacts :: ![Row] }
  | SearchNoResult      { message  :: !Text }
  deriving (Generic)
instance FromJSON SearchResultTypes where
  parseJSON = genericParseJSON (defaultOptions { sumEncoding = defaultTaggedObject })
instance ToJSON SearchResultTypes where
  toJSON = genericToJSON (defaultOptions { sumEncoding = defaultTaggedObject })

instance Arbitrary SearchResultTypes where
  arbitrary = do
    srd <- SearchResultDoc     <$> arbitrary
    src <- SearchResultContact <$> arbitrary
    srn <- pure $ SearchNoResult "No result because.."
    elements [srd, src, srn]

instance ToSchema SearchResultTypes where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "")


--------------------------------------------------------------------

data Row =
    Document { id         :: !NodeId
             , created    :: !UTCTime
             , title      :: !Text
             , hyperdata  :: !HyperdataRow
             , category   :: !Int
             , score      :: !Int
             }
  | Contact  { c_id         :: !Int
             , c_created    :: !UTCTime
             , c_hyperdata  :: !HyperdataRow
             , c_score      :: !Int
             , c_annuaireId :: !NodeId
             }
  deriving (Generic)
instance FromJSON  Row
  where
    parseJSON = genericParseJSON
                 ( defaultOptions { sumEncoding = defaultTaggedObject } )
instance ToJSON  Row
  where
    toJSON = genericToJSON (defaultOptions { sumEncoding = defaultTaggedObject })
instance Arbitrary Row where
  arbitrary = arbitrary

instance ToSchema Row where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "")

class ToRow a where
  toRow :: NodeId -> a -> Row

instance ToRow FacetDoc where
  toRow _ (FacetDoc { .. }) =
    Document { id = facetDoc_id
             , created = facetDoc_created
             , title = facetDoc_title
             , hyperdata = toHyperdataRow facetDoc_hyperdata
             , category = fromMaybe 0 facetDoc_category
             , score = round $ fromMaybe 0 facetDoc_score }

-- | TODO rename FacetPaired
type FacetContact = FacetPaired Int UTCTime HyperdataContact Int

instance ToRow FacetContact where
  toRow annuaireId (FacetPaired nId utc h s) = Contact nId utc (toHyperdataRow h) s annuaireId


--------------------------------------------------------------------
data HyperdataRow =
  HyperdataRowDocument { _hr_abstract           :: !Text
                       , _hr_authors            :: !Text
                       , _hr_bdd                :: !Text
                       , _hr_doi                :: !Text
                       , _hr_institutes         :: !Text
                       , _hr_language_iso2      :: !Text
                       , _hr_page               :: !Int
                       , _hr_publication_date   :: !Text
                       , _hr_publication_day    :: !Int
                       , _hr_publication_hour   :: !Int
                       , _hr_publication_minute :: !Int
                       , _hr_publication_month  :: !Int
                       , _hr_publication_second :: !Int
                       , _hr_publication_year   :: !Int
                       , _hr_source             :: !Text
                       , _hr_title              :: !Text
                       , _hr_url                :: !Text
                       , _hr_uniqId             :: !Text
                       , _hr_uniqIdBdd          :: !Text
                       }
  | HyperdataRowContact { _hr_firstname :: !Text
                        , _hr_lastname  :: !Text
                        , _hr_labs      :: !Text
                        }
  deriving (Generic)
instance FromJSON  HyperdataRow
  where
    parseJSON = genericParseJSON
              ( defaultOptions
                { sumEncoding = defaultTaggedObject
                , fieldLabelModifier = unCapitalize . dropPrefix "_hr_"
                , omitNothingFields = False
                }
              )
instance ToJSON  HyperdataRow
  where
    toJSON = genericToJSON
               ( defaultOptions
                { sumEncoding = defaultTaggedObject
                , fieldLabelModifier = unCapitalize . dropPrefix "_hr_"
                , omitNothingFields = False
                }
              )

instance Arbitrary HyperdataRow where
  arbitrary = arbitrary

instance ToSchema HyperdataRow where
  declareNamedSchema = genericDeclareNamedSchema (unPrefixSwagger "_hr_")

class ToHyperdataRow a where
  toHyperdataRow :: a -> HyperdataRow

instance ToHyperdataRow HyperdataDocument where
  toHyperdataRow (HyperdataDocument { .. }) =
    HyperdataRowDocument
      { _hr_abstract = fromMaybe "" _hd_abstract
      , _hr_authors = fromMaybe "" _hd_authors
      , _hr_bdd = fromMaybe "" _hd_bdd
      , _hr_doi = fromMaybe "" _hd_doi
      , _hr_institutes = fromMaybe "" _hd_institutes
      , _hr_language_iso2 = fromMaybe "EN" _hd_language_iso2
      , _hr_page = fromMaybe 0 _hd_page
      , _hr_publication_date = fromMaybe "" _hd_publication_date
      , _hr_publication_year = fromMaybe (fromIntegral Defaults.year) _hd_publication_year
      , _hr_publication_month = fromMaybe Defaults.month _hd_publication_month
      , _hr_publication_day = fromMaybe Defaults.day _hd_publication_day
      , _hr_publication_hour = fromMaybe 0 _hd_publication_hour
      , _hr_publication_minute = fromMaybe 0 _hd_publication_minute
      , _hr_publication_second = fromMaybe 0 _hd_publication_second
      , _hr_source = fromMaybe "" _hd_source
      , _hr_title = fromMaybe "Title" _hd_title
      , _hr_url = fromMaybe "" _hd_url
      , _hr_uniqId = fromMaybe "" _hd_uniqId
      , _hr_uniqIdBdd = fromMaybe "" _hd_uniqIdBdd }

instance ToHyperdataRow HyperdataContact where
  toHyperdataRow (HyperdataContact { _hc_who = Just (ContactWho _ fn ln _ _ _), _hc_where = ou} ) =
    HyperdataRowContact (fromMaybe "FirstName" fn) (fromMaybe "LastName" ln) ou'
      where
        ou' = maybe "CNRS" (Text.intercalate " " . _cw_organization) (head ou)
  toHyperdataRow (HyperdataContact {}) =
    HyperdataRowContact "FirstName" "LastName" "Labs"