{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE TemplateHaskell   #-}
module GitHub.PullRequestsSpec where

import qualified GitHub

import Prelude ()
import Prelude.Compat

import Data.Aeson.Compat     (eitherDecodeStrict)
import Data.ByteString       (ByteString)
import Data.Either.Compat    (isRight)
import Data.FileEmbed        (embedFile)
import Data.Foldable         (for_)
import Data.String           (fromString)
import qualified Data.Vector as V
import System.Environment    (lookupEnv)
import Test.Hspec            (Spec, describe, it, pendingWith, shouldBe, shouldSatisfy)

fromRightS :: Show a => Either a b -> b
fromRightS (Right b) = b
fromRightS (Left a) = error $ "Expected a Right and got a Left" ++ show a

withAuth :: (GitHub.Auth -> IO ()) -> IO ()
withAuth action = do
    mtoken <- lookupEnv "GITHUB_TOKEN"
    case mtoken of
        Nothing    -> pendingWith "no GITHUB_TOKEN"
        Just token -> action (GitHub.OAuth $ fromString token)

spec :: Spec
spec = do
    describe "pullRequestsForR" $ do
        it "works" $ withAuth $ \auth -> for_ repos $ \(owner, repo) -> do
            cs <- GitHub.executeRequest auth $
                GitHub.pullRequestsForR owner repo opts GitHub.FetchAll
            cs `shouldSatisfy` isRight

    describe "decoding pull request payloads" $ do
        it "decodes a pull request 'opened' payload" $ do
            V.length (GitHub.simplePullRequestRequestedReviewers simplePullRequestOpened)
                `shouldBe` 0

            V.length (GitHub.pullRequestRequestedReviewers pullRequestOpened)
                `shouldBe` 0

        it "decodes a pull request 'review_requested' payload" $ do
            V.length (GitHub.simplePullRequestRequestedReviewers simplePullRequestReviewRequested)
                `shouldBe` 1

            V.length (GitHub.pullRequestRequestedReviewers pullRequestReviewRequested)
                `shouldBe` 1
  where
    repos =
      [ ("thoughtbot", "paperclip")
      , ("phadej", "github")
      , ("haskell", "cabal")
      ]
    opts = GitHub.stateClosed

    simplePullRequestOpened :: GitHub.SimplePullRequest
    simplePullRequestOpened =
        fromRightS (eitherDecodeStrict prOpenedPayload)

    pullRequestOpened :: GitHub.PullRequest
    pullRequestOpened =
        fromRightS (eitherDecodeStrict prOpenedPayload)

    simplePullRequestReviewRequested :: GitHub.SimplePullRequest
    simplePullRequestReviewRequested =
        fromRightS (eitherDecodeStrict prReviewRequestedPayload)

    pullRequestReviewRequested :: GitHub.PullRequest
    pullRequestReviewRequested =
        fromRightS (eitherDecodeStrict prReviewRequestedPayload)

    prOpenedPayload :: ByteString
    prOpenedPayload = $(embedFile "fixtures/pull-request-opened.json")

    prReviewRequestedPayload :: ByteString
    prReviewRequestedPayload = $(embedFile "fixtures/pull-request-review-requested.json")