module History
  ( Issues (..),
    IssueEvents (..),
    getIssues,
    getIssueEvents,
    getIssuesOfFile,
  )
where

import Backend qualified
import Comment qualified as G
import Control.Exception (Handler (..), catches)
import Data.List.NonEmpty qualified as NE
import Data.Maybe (catMaybes)
import Data.Proxy (Proxy (Proxy))
import Exception qualified as E
import History.IssueEvents (IssueEvents (..))
import History.Issues (Issues (..))
import History.Plan (formulate, realise)
import History.Scramble (fromComment)
import Issue qualified as I
import Parallel (parMapM)

getIssues :: IO Issues
getIssues =
  realise . (formulate Proxy) . NE.fromList
    =<< Backend.getCommitHashes Nothing (Just Backend.WorkingTree)

getIssueEvents :: IO IssueEvents
getIssueEvents =
  realise . (formulate Proxy) . NE.fromList
    =<< Backend.getCommitHashes Nothing (Just Backend.WorkingTree)

-- | Get all issues in the given directory and file.
getIssuesOfFile :: Backend.CommitHash -> FilePath -> IO [I.Issue]
getIssuesOfFile commitHash filename =
  ( fmap catMaybes . parMapM (fromComment commitHash)
      =<< G.getComments commitHash filename
  )
    `catches` [ Handler \(_ :: E.UnknownFile) -> pure [],
                Handler \(_ :: E.UnsupportedLanguage) -> pure []
              ]