{-# LANGUAGE QuasiQuotes #-}

module EVM.Test.Utils where

import Data.String.Here
import Data.Text (Text)
import Data.Text qualified as T
import Data.Text.IO qualified as T
import GHC.IO.Handle (hClose)
import GHC.Natural
import Paths_hevm qualified as Paths
import System.Directory
import System.IO.Temp
import System.Process
import System.Exit

import EVM.Dapp (dappInfo, emptyDapp)
import EVM.Fetch (RpcInfo)
import EVM.Solidity
import EVM.Solvers
import EVM.UnitTest
import Control.Monad.ST (RealWorld)

runSolidityTestCustom :: FilePath -> Text -> Maybe Natural -> Maybe Integer -> Bool -> RpcInfo -> ProjectType -> IO Bool
runSolidityTestCustom testFile match timeout maxIter ffiAllowed rpcinfo projectType = do
  withSystemTempDirectory "dapp-test" $ \root -> do
    compile projectType root testFile >>= \case
      Left e -> error e
      Right bo@(BuildOutput contracts _) -> do
        withSolvers Z3 1 timeout $ \solvers -> do
          opts <- testOpts solvers root (Just bo) match maxIter ffiAllowed rpcinfo
          unitTest opts contracts

runSolidityTest :: FilePath -> Text -> IO Bool
runSolidityTest testFile match = runSolidityTestCustom testFile match Nothing Nothing True Nothing Foundry

testOpts :: SolverGroup -> FilePath -> Maybe BuildOutput -> Text -> Maybe Integer -> Bool -> RpcInfo -> IO (UnitTestOptions RealWorld)
testOpts solvers root buildOutput match maxIter allowFFI rpcinfo = do
  let srcInfo = maybe emptyDapp (dappInfo root) buildOutput

  params <- paramsFromRpc rpcinfo

  pure UnitTestOptions
    { solvers = solvers
    , rpcInfo = rpcinfo
    , maxIter = maxIter
    , askSmtIters = 1
    , smtDebug = False
    , smtTimeout = Nothing
    , solver = Nothing
    , verbose = Just 1
    , match = match
    , testParams = params
    , dapp = srcInfo
    , ffiAllowed = allowFFI
    }

compile :: ProjectType -> FilePath -> FilePath -> IO (Either String BuildOutput)
compile DappTools root src = do
  json <- compileWithDSTest src
  createDirectory (root <> "/out")
  T.writeFile (root <> "/out/dapp.sol.json") json
  readBuildOutput root DappTools
compile CombinedJSON _root _src = error "unsupported"
compile Foundry root src = do
  createDirectory (root <> "/src")
  writeFile (root <> "/src/unit-tests.t.sol") =<< readFile =<< Paths.getDataFileName src
  initLib (root <> "/lib/ds-test") "test/contracts/lib/test.sol" "test.sol"
  initLib (root <> "/lib/tokens") "test/contracts/lib/erc20.sol" "erc20.sol"
  r@(res,_,_) <- readProcessWithExitCode "forge" ["build", "--root", root] ""
  case res of
    ExitFailure _ -> pure . Left $ "compilation failed: " <> show r
    ExitSuccess -> readBuildOutput root Foundry
  where
    initLib :: FilePath -> FilePath -> FilePath -> IO ()
    initLib tld srcFile dstFile = do
      createDirectoryIfMissing True (tld <> "/src")
      writeFile (tld <> "/src/" <> dstFile) =<< readFile =<< Paths.getDataFileName srcFile
      _ <- readProcessWithExitCode "git" ["init", tld] ""
      callProcess "git" ["config", "--file", tld <> "/.git/config", "user.name", "'hevm'"]
      callProcess "git" ["config", "--file", tld <> "/.git/config", "user.email", "'hevm@hevm.dev'"]
      callProcess "git" ["--git-dir", tld <> "/.git", "--work-tree", tld, "add", tld]
      _ <- readProcessWithExitCode "git" ["--git-dir", tld <> "/.git", "--work-tree", tld, "--no-gpg-sign", "commit", "-m"] ""
      pure ()

-- We don't want to depend on dapptools here, so we cheat and just call solc with the same options that dapp itself uses
compileWithDSTest :: FilePath -> IO Text
compileWithDSTest src =
  withSystemTempFile "input.json" $ \file handle -> do
    hClose handle
    dsTest <- readFile =<< Paths.getDataFileName "test/contracts/lib/test.sol"
    erc20 <- readFile =<< Paths.getDataFileName "test/contracts/lib/erc20.sol"
    testFilePath <- Paths.getDataFileName src
    testFile <- readFile testFilePath
    T.writeFile file
      [i|
      {
        "language": "Solidity",
        "sources": {
          "ds-test/test.sol": {
            "content": ${dsTest}
          },
          "tokens/erc20.sol": {
            "content": ${erc20}
          },
          "unit-tests.sol": {
            "content": ${testFile}
          }
        },
        "settings": {
          "metadata": {
            "useLiteralContent": true
          },
          "outputSelection": {
            "*": {
              "*": [
                "metadata",
                "evm.bytecode",
                "evm.deployedBytecode",
                "abi",
                "storageLayout",
                "evm.bytecode.sourceMap",
                "evm.bytecode.linkReferences",
                "evm.bytecode.generatedSources",
                "evm.deployedBytecode.sourceMap",
                "evm.deployedBytecode.linkReferences",
                "evm.deployedBytecode.generatedSources"
              ],
              "": [
                "ast"
              ]
            }
          }
        }
      }
      |]
    x <- T.pack <$>
      readProcess
        "solc"
        ["--allow-paths", file, "--standard-json", file]
        ""
    return x