{-# LANGUAGE NoImplicitPrelude          #-}
{-# LANGUAGE OverloadedStrings          #-}

module IntegrationTest (
    withApp,
    integrationSpec
) where

import BasicPrelude
import Data.Aeson                   (FromJSON, parseJSON, (.:))
import qualified Data.Aeson as JSON
import Network.Wai.Test             (simpleBody)
import Test.Hspec                   (Spec, SpecWith, before,
                                     describe, context, it)
import qualified Yesod.Test as YT

import TestSite                     (App, Route(..), Handler, runDB)
import TestTools

type MyTestApp = YT.TestApp App
withApp :: App -> SpecWith (YT.TestApp App) -> Spec
withApp app = before $ return (app, id)

authUrl :: Text
authUrl = "http://localhost:3000/auth/login"

data AuthUrl = AuthUrl Text deriving Eq
instance FromJSON AuthUrl where
    parseJSON (JSON.Object v) = AuthUrl <$> v .: "authentication_url"
    parseJSON _ = mempty

loginUrl :: Text
loginUrl = "http://localhost:3000/auth/page/hashdb/login"

data LoginUrl = LoginUrl Text deriving Eq
instance FromJSON LoginUrl where
    parseJSON (JSON.Object v) = LoginUrl <$> v .: "loginUrl"
    parseJSON _ = mempty

successMsg :: Text
successMsg = "Login Successful"

data SuccessMsg = SuccessMsg Text deriving Eq
instance FromJSON SuccessMsg where
    parseJSON (JSON.Object v) = SuccessMsg <$> v .: "message"
    parseJSON _ = mempty

getBodyJSON :: FromJSON a => YT.YesodExample site (Maybe a)
getBodyJSON = do
    resp <- YT.getResponse
    let body = simpleBody <$> resp
        result = JSON.decode =<< body
    return result

integrationSpec :: SpecWith MyTestApp
integrationSpec = do
    describe "The home page" $ do
      it "can be accessed" $ do
        YT.get HomeR
        YT.statusIs 200

    describe "The protected page" $ do
      it "requires login" $ do
        needsLogin GET ("/prot" :: Text)
      it "looks right after login by a valid user" $ do
        _ <- doLogin "paul" "MyPassword"
        YT.get ProtectedR
        YT.statusIs 200
        YT.bodyContains "OK, you are logged in so you are allowed to see this!"
      it "can't be accessed after login then logout" $ do
        _ <- doLogin "paul" "MyPassword"
        YT.get $ AuthR LogoutR
        -- That `get` will get the form from Yesod.Core.Handler.redirectToPost
        -- which will not be submitted automatically without javascript
        YT.bodyContains "please click on the button below to be redirected"
        -- so we do the redirection ourselves:
        YT.request $ do
            YT.setMethod "POST"
            YT.setUrl $ AuthR LogoutR
            -- yesod-core-1.4.19 added the CSRF token to the redirectToPost form
            YT.addToken
        YT.get HomeR
        YT.statusIs 200
        YT.bodyContains "Your current auth ID: Nothing"
        YT.get ProtectedR
        YT.statusIs 303

    describe "Login" $ do
      it "fails when incorrect password given" $ do
        loc <- doLoginPart1 "paul" "WrongPassword"
        checkFailedLogin loc
      it "fails when unknown user name given" $ do
        loc <- doLoginPart1 "xyzzy" "WrongPassword"
        checkFailedLogin loc

    describe "JSON Login" $ do
      it "JSON access to protected page gives JSON object with auth URL" $ do
        YT.request $ do
          YT.setMethod "GET"
          YT.setUrl ProtectedR
          YT.addRequestHeader ("Accept", "application/json")
        YT.statusIs 401
        auth <- getBodyJSON
        YT.assertEqual "Authentication URL" auth (Just $ AuthUrl authUrl)
      it "Custom loginHandler using submitRouteHashDB has correct URL in JSON" $ do
        YT.request $ do
          YT.setMethod "GET"
          YT.setUrl authUrl
          YT.addRequestHeader ("Accept", "application/json")
        YT.statusIs 200
        login <- getBodyJSON
        YT.assertEqual "Login URL" login (Just $ LoginUrl loginUrl)
      -- This example needs yesod-test >= 1.5.0.1, since older ones use wrong
      -- content type for JSON (https://github.com/yesodweb/yesod/issues/1063).
      it "Sending JSON username and password produces JSON success message" $ do
        -- This first request is only to get the CSRF token cookie, used below
        YT.request $ do
          YT.setMethod "GET"
          YT.setUrl authUrl
          YT.addRequestHeader ("Accept", "application/json")
        YT.request $ do
          YT.setMethod "POST"
          YT.setUrl loginUrl
          YT.addRequestHeader ("Accept", "application/json")
          YT.addRequestHeader ("Content-Type", "application/json; charset=utf-8")
          YT.setRequestBody "{\"username\":\"paul\",\"password\":\"MyPassword\"}"
          -- CSRF token is being checked, since yesod-core >= 1.4.14 is forced
          YT.addTokenFromCookie
        YT.statusIs 200
        msg <- getBodyJSON
        YT.assertEqual "Login success" msg (Just $ SuccessMsg successMsg)