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module Issue
  ( Issue (..),
    Provenance (..),
    id,
    internalTags,
  )
where

import Data.Binary (Binary)
import Data.List (find)
import Data.Text qualified as T
import Data.Time.Clock (UTCTime (utctDay))
import GHC.Generics (Generic)
import GHC.Records (HasField (..))
import Issue.Provenance (Author (..), Commit (..), Provenance (..))
import Issue.Tag (Tag (..))
import TreeGrepper.Match qualified as G
import Prelude hiding (id)

data Issue = Issue
  { title :: T.Text,
    description :: Maybe T.Text,
    file :: String,
    provenance :: Provenance,
    start :: G.Position,
    end :: G.Position,
    tags :: [Tag],
    markers :: [T.Text],
    rawText :: T.Text
  }
  deriving (Show, Binary, Generic, Eq)

id :: Issue -> Maybe String
id issue =
  (\(Tag _ v) -> T.unpack <$> v)
    =<< find (\(Tag k _) -> k == "id") (issue.tags ++ issue.internalTags)

internalTags :: Issue -> [Tag]
internalTags (Issue {..}) =
  concat
    [ [ Tag "id" $ Just $ toSpinalCase title,
        Tag "title" $ Just $ title,
        Tag "createdAt" $ Just $ T.pack $ show $ utctDay provenance.first.date,
        Tag "modifiedAt" $ Just $ T.pack $ show $ utctDay provenance.last.date,
        Tag "author" $ Just $ provenance.first.author.name,
        Tag "editor" $ Just $ provenance.last.author.name
      ],
      map (Tag "type" . Just) markers
    ]

instance HasField "internalTags" Issue [Tag] where
  getField issue = internalTags issue

toSpinalCase :: T.Text -> T.Text
toSpinalCase = T.replace " " "-" . T.filter keep . T.toLower
  where
    keep = (`elem` (concat [[' ', '-'], ['a' .. 'z'], ['0' .. '9']]))