{-|
An example of using project-forge on a directory.

-}
{-# LANGUAGE OverloadedStrings   #-}
{-# LANGUAGE ScopedTypeVariables #-}

module SingleDirectory.Example where

import           Control.Exception
import           Data.Aeson
import           ProjectForge
import           Test.Tasty
import           Test.Tasty.HUnit

exampleTemplate :: (MonadLogger m, MonadIO m ) => m ProjectTemplate
exampleTemplate = getProjectTemplateFromDir "examples/SingleDirectory/project-template/"

varsComplete :: Value
varsComplete = object
  [ "prj" .= String "Some Project"
  , "desc" .= String "This is a description on some project"
  , "srcDir" .= String "src"
  ]

varsIncomplete :: Value
varsIncomplete = object
  [ "prj" .= String "Some Project"
  ]

runExample1 :: Value -> IO [(FilePath, Text)]
runExample1 v =
  runSimpleLoggingT
  (exampleTemplate >>= (\x -> renderProjectTemplate (MkRenderTemplateOpts WarningAsError) x v))

runExample2 :: Value -> IO [(FilePath, Text)]
runExample2 v =
  runSimpleLoggingT
  (exampleTemplate >>= (\x -> renderProjectTemplate (MkRenderTemplateOpts Ignore) x v))

catchRunExample :: Value -> IO (Maybe [(FilePath, Text)])
catchRunExample v = do
  catch
    ( Just <$> runSimpleLoggingT
      (exampleTemplate >>= (\x -> renderProjectTemplate (MkRenderTemplateOpts WarningAsError) x v)))
    (\(e :: SomeException) -> pure Nothing )

exampleSuccess1 :: IO TestTree
exampleSuccess1 = testCase "Render should succeed with complete variables" .
  assertEqual "results should be equal"
    [ ("examples/SingleDirectory/project-template/.gitignore","# your basic .gitignore\n\n.RData")
    , ("examples/SingleDirectory/project-template/README.md", "# This is the Some Project project\n\nHere you can read more about it: \n\nThis is a description on some project\n")
    , ("examples/SingleDirectory/project-template/src/no-template-variables.R","# An example of a file without template variables\n\n\"this file is copied as-is\"")
    , ("examples/SingleDirectory/project-template/src/project.R", "# This is the source code for Some Project\n\nprint_prj <- function() {\n  print(\"Some Project\")\n}")
    ]
    <$> runExample1 varsComplete

exampleSuccess2 :: IO TestTree
exampleSuccess2 = testCase "Render should succeed with incomplete variables when ignoring errors" .
  assertEqual "results should be equal"
     [ ("examples/SingleDirectory/project-template/.gitignore","# your basic .gitignore\n\n.RData")
     , ("examples/SingleDirectory/project-template/README.md","# This is the Some Project project\n\nHere you can read more about it: \n\n\n")
     , ("examples/SingleDirectory/project-template//no-template-variables.R","# An example of a file without template variables\n\n\"this file is copied as-is\"")
     , ("examples/SingleDirectory/project-template//project.R", "# This is the source code for Some Project\n\nprint_prj <- function() {\n  print(\"Some Project\")\n}")
     ]
    <$> runExample2 varsIncomplete

exampleFailed :: IO TestTree
exampleFailed = testCase "Render should fail with incomplete variables" <$> (do
    results <- catchRunExample varsIncomplete
    case results of
      Nothing -> pure $ assertBool "Successfully failed" True
      Just _  -> assertFailure "This test *should* fail"
    )

examples :: IO TestTree
examples =  testGroup "SimpleFile examples" <$> sequenceA [exampleSuccess1, exampleSuccess2, exampleFailed]