{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE NamedFieldPuns #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}

module FileDescriptionTests where

import Control.Exception (bracket_)
import qualified Data.ByteString.Char8 as B
import qualified Data.Yaml as Y
import Simplex.FileTransfer.Description
import Simplex.FileTransfer.Protocol
import qualified Simplex.Messaging.Crypto as C
import Simplex.Messaging.Encoding.String (StrEncoding (..))
import Simplex.Messaging.Protocol (EntityId (..))
import Simplex.Messaging.ServiceScheme (ServiceScheme (..))
import System.Directory (removeFile)
import Test.Hspec

fileDescriptionTests :: Spec
fileDescriptionTests = do
  describe "file description parsing / serializing" $ do
    it "parse YAML file description" testParseYAMLFileDescription
    it "serialize YAML file description" testSerializeYAMLFileDescription
    it "parse file description" testParseFileDescription
    it "serialize file description" testSerializeFileDescription
    describe "file description URIs" $ do
      it "round trip file description URI" testFileDescriptionURI
      it "round trip file description URI with extra JSON" testFileDescriptionURIExtras

fileDescPath :: FilePath
fileDescPath = "tests/fixtures/file_description.yaml"

tmpFileDescPath :: FilePath
tmpFileDescPath = "tests/tmp/file_description.yaml"

testSbKey :: C.SbKey
testSbKey = either error id $ strDecode "00n8p1tJq5E-SGnHcYTOrS4A9I07gTA_WFD6MTFFFOY="

testCbNonce :: C.CbNonce
testCbNonce = either error id $ strDecode "dPSF-wrQpDiK_K6sYv0BDBZ9S4dg-jmu"

fileDesc :: FileDescription 'FRecipient
fileDesc =
  FileDescription
    { party = SFRecipient,
      size = FileSize $ mb 26,
      digest = FileDigest "abc",
      key = testSbKey,
      nonce = testCbNonce,
      chunkSize = defaultChunkSize,
      chunks =
        [ FileChunk
            { chunkNo = 1,
              digest = chunkDigest,
              chunkSize = defaultChunkSize,
              replicas =
                [ FileChunkReplica {server = "xftp://abc=@example1.com", replicaId, replicaKey},
                  FileChunkReplica {server = "xftp://abc=@example3.com", replicaId, replicaKey}
                ]
            },
          FileChunk
            { chunkNo = 2,
              digest = chunkDigest,
              chunkSize = defaultChunkSize,
              replicas =
                [ FileChunkReplica {server = "xftp://abc=@example2.com", replicaId, replicaKey},
                  FileChunkReplica {server = "xftp://abc=@example4.com", replicaId, replicaKey}
                ]
            },
          FileChunk
            { chunkNo = 3,
              digest = chunkDigest,
              chunkSize = defaultChunkSize,
              replicas =
                [ FileChunkReplica {server = "xftp://abc=@example1.com", replicaId, replicaKey},
                  FileChunkReplica {server = "xftp://abc=@example4.com", replicaId, replicaKey}
                ]
            },
          FileChunk
            { chunkNo = 4,
              digest = chunkDigest,
              chunkSize = FileSize $ mb 2,
              replicas =
                [ FileChunkReplica {server = "xftp://abc=@example2.com", replicaId, replicaKey},
                  FileChunkReplica {server = "xftp://abc=@example3.com", replicaId, replicaKey}
                ]
            }
        ],
      redirect = Nothing
    }
  where
    defaultChunkSize = FileSize $ mb 8
    replicaId = ChunkReplicaId $ EntityId "abc"
    replicaKey = C.APrivateAuthKey C.SEd25519 "MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe"
    chunkDigest = FileDigest "ghi"

yamlFileDesc :: YAMLFileDescription
yamlFileDesc =
  YAMLFileDescription
    { party = FRecipient,
      size = "26mb",
      chunkSize = "8mb",
      digest = FileDigest "abc",
      key = testSbKey,
      nonce = testCbNonce,
      replicas =
        [ YAMLServerReplicas
            { server = "xftp://abc=@example1.com",
              chunks =
                [ "1:YWJj:MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe:Z2hp",
                  "3:YWJj:MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe:Z2hp"
                ]
            },
          YAMLServerReplicas
            { server = "xftp://abc=@example2.com",
              chunks =
                [ "2:YWJj:MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe:Z2hp",
                  "4:YWJj:MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe:Z2hp:2mb"
                ]
            },
          YAMLServerReplicas
            { server = "xftp://abc=@example3.com",
              chunks =
                [ "1:YWJj:MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe",
                  "4:YWJj:MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe"
                ]
            },
          YAMLServerReplicas
            { server = "xftp://abc=@example4.com",
              chunks =
                [ "2:YWJj:MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe",
                  "3:YWJj:MC4CAQAwBQYDK2VwBCIEIDfEfevydXXfKajz3sRkcQ7RPvfWUPoq6pu1TYHV1DEe"
                ]
            }
        ],
      redirect = Nothing
    }

testParseYAMLFileDescription :: IO ()
testParseYAMLFileDescription = do
  yfd <- Y.decodeFileThrow fileDescPath
  yfd `shouldBe` yamlFileDesc

testSerializeYAMLFileDescription :: IO ()
testSerializeYAMLFileDescription = withRemoveTmpFile $ do
  Y.encodeFile tmpFileDescPath yamlFileDesc
  fdSer <- B.readFile tmpFileDescPath
  fdExp <- B.readFile fileDescPath
  fdSer `shouldBe` fdExp

testParseFileDescription :: IO ()
testParseFileDescription = do
  r <- strDecode <$> B.readFile fileDescPath
  case r of
    Left e -> expectationFailure $ show e
    Right fd -> fd `shouldBe` fileDesc

testSerializeFileDescription :: IO ()
testSerializeFileDescription = withRemoveTmpFile $ do
  B.writeFile tmpFileDescPath $ strEncode fileDesc
  fdSer <- B.readFile tmpFileDescPath
  fdExp <- B.readFile fileDescPath
  fdSer `shouldBe` fdExp

testFileDescriptionURI :: IO ()
testFileDescriptionURI = do
  vfd <- either fail pure $ validateFileDescription fileDesc
  let descr = FileDescriptionURI SSSimplex vfd mempty
  strDecode (strEncode descr) `shouldBe` Right descr

testFileDescriptionURIExtras :: IO ()
testFileDescriptionURIExtras = do
  vfd <- either fail pure $ validateFileDescription fileDesc
  let descr = FileDescriptionURI SSSimplex vfd $ Just "{\"something\":\"extra\",\"more\":true}"
  strDecode (strEncode descr) `shouldBe` Right descr

withRemoveTmpFile :: IO () -> IO ()
withRemoveTmpFile =
  bracket_
    (pure ())
    (removeFile tmpFileDescPath)