{-# LANGUAGE OverloadedStrings          #-}

import Control.Exception     (bracket)
import Database.MySQL.Simple (ConnectInfo (..), defaultConnectInfo,
                              connect, close,
                              query_, Only (..))
import System.Exit           (exitFailure)
import Test.Hspec
import TestOpts              (dbtests)

-- This is how to connect to our test database
testConn :: ConnectInfo
testConn = defaultConnectInfo {
               connectHost     = "127.0.0.1",
               connectUser     = "test",
               connectDatabase = "test"
           }

advice :: String
advice =
    "\n\
    \Database test not run for mysql-simple\n\
    \======================================\n\
    \\n\
    \To run the tests properly, you need to specify the flag 'dbtests' when\n\
    \building the test, for example either of these commands will do it:\n\
    \\n\
    \    stack test --flag mysql-simple:dbtests\n\
    \    cabal configure --enable-tests --flags=dbtests && cabal test\n\
    \\n\
    \You also need to set up a MySQL database which the test can use via\n\
    \these connection parameters:\n\
    \\n\
    \    Host          \"127.0.0.1\"\n\
    \    Port          3306\n\
    \    User          \"test\"\n\
    \    Password      \"\"\n\
    \    Database      \"test\"\n\
    \\n"
    

-- Only the most cursory test is done at the moment, simply showing that
-- things hang together sufficiently well that we can talk to the database
-- server.
--
main :: IO ()
main = if dbtests then bracket (connect testConn) close $ \conn -> hspec $ do
    describe "Database" $ do
      it "seems to be connected" $ do
        result <- query_ conn "select 1 + 1"
        result `shouldBe` [Only (2::Int)]
  else do
      putStr advice
      exitFailure