-- | The handlers exposed by the language server.
module Futhark.LSP.Handlers (handlers) where

import Colog.Core (logStringStderr, (<&))
import Control.Lens ((^.))
import Data.Aeson.Types (Value (Array, String))
import Data.IORef
import Data.Vector qualified as V
import Futhark.LSP.Compile (tryReCompile, tryTakeStateFromIORef)
import Futhark.LSP.State (State (..))
import Futhark.LSP.Tool (findDefinitionRange, getHoverInfoFromState)
import Language.LSP.Server (Handlers, LspM, notificationHandler, requestHandler)
import Language.LSP.Types
import Language.LSP.Types.Lens (HasUri (uri))

onInitializeHandler :: Handlers (LspM ())
onInitializeHandler :: Handlers (LspT () IO)
onInitializeHandler = forall (m :: Method 'FromClient 'Notification) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
notificationHandler SMethod 'Initialized
SInitialized forall a b. (a -> b) -> a -> b
$ \NotificationMessage 'Initialized
_msg ->
  forall (m :: * -> *). MonadIO m => LogAction m String
logStringStderr forall (m :: * -> *) msg. LogAction m msg -> msg -> m ()
<& String
"Initialized"

onHoverHandler :: IORef State -> Handlers (LspM ())
onHoverHandler :: IORef State -> Handlers (LspT () IO)
onHoverHandler IORef State
state_mvar = forall (m :: Method 'FromClient 'Request) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
requestHandler SMethod 'TextDocumentHover
STextDocumentHover forall a b. (a -> b) -> a -> b
$ \RequestMessage 'TextDocumentHover
req Either ResponseError (Maybe Hover) -> LspT () IO ()
responder -> do
  let RequestMessage Text
_ LspId 'TextDocumentHover
_ SMethod 'TextDocumentHover
_ (HoverParams TextDocumentIdentifier
doc Position
pos Maybe ProgressToken
_workDone) = RequestMessage 'TextDocumentHover
req
      Position UInt
l UInt
c = Position
pos
      file_path :: Maybe String
file_path = Uri -> Maybe String
uriToFilePath forall a b. (a -> b) -> a -> b
$ TextDocumentIdentifier
doc forall s a. s -> Getting a s a -> a
^. forall s a. HasUri s a => Lens' s a
uri
  forall (m :: * -> *). MonadIO m => LogAction m String
logStringStderr forall (m :: * -> *) msg. LogAction m msg -> msg -> m ()
<& (String
"Got hover request: " forall a. Semigroup a => a -> a -> a
<> forall a. Show a => a -> String
show (Maybe String
file_path, Position
pos))
  State
state <- IORef State -> Maybe String -> LspT () IO State
tryTakeStateFromIORef IORef State
state_mvar Maybe String
file_path
  Either ResponseError (Maybe Hover) -> LspT () IO ()
responder forall a b. (a -> b) -> a -> b
$ forall a b. b -> Either a b
Right forall a b. (a -> b) -> a -> b
$ State -> Maybe String -> Int -> Int -> Maybe Hover
getHoverInfoFromState State
state Maybe String
file_path (forall a. Enum a => a -> Int
fromEnum UInt
l forall a. Num a => a -> a -> a
+ Int
1) (forall a. Enum a => a -> Int
fromEnum UInt
c forall a. Num a => a -> a -> a
+ Int
1)

onDocumentFocusHandler :: IORef State -> Handlers (LspM ())
onDocumentFocusHandler :: IORef State -> Handlers (LspT () IO)
onDocumentFocusHandler IORef State
state_mvar = forall (m :: Method 'FromClient 'Notification) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
notificationHandler (forall {f :: From} {t :: MethodType}. Text -> SMethod 'CustomMethod
SCustomMethod Text
"custom/onFocusTextDocument") forall a b. (a -> b) -> a -> b
$ \NotificationMessage 'CustomMethod
msg -> do
  forall (m :: * -> *). MonadIO m => LogAction m String
logStringStderr forall (m :: * -> *) msg. LogAction m msg -> msg -> m ()
<& String
"Got custom request: onFocusTextDocument"
  let NotificationMessage Text
_ SMethod 'CustomMethod
_ (Array Array
vector_param) = NotificationMessage 'CustomMethod
msg
      String Text
focused_uri = forall a. Vector a -> a
V.head Array
vector_param -- only one parameter passed from the client
  IORef State -> Maybe String -> LspT () IO ()
tryReCompile IORef State
state_mvar (Uri -> Maybe String
uriToFilePath (Text -> Uri
Uri Text
focused_uri))

goToDefinitionHandler :: IORef State -> Handlers (LspM ())
goToDefinitionHandler :: IORef State -> Handlers (LspT () IO)
goToDefinitionHandler IORef State
state_mvar = forall (m :: Method 'FromClient 'Request) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
requestHandler SMethod 'TextDocumentDefinition
STextDocumentDefinition forall a b. (a -> b) -> a -> b
$ \RequestMessage 'TextDocumentDefinition
req Either
  ResponseError (Location |? (List Location |? List LocationLink))
-> LspT () IO ()
responder -> do
  let RequestMessage Text
_ LspId 'TextDocumentDefinition
_ SMethod 'TextDocumentDefinition
_ (DefinitionParams TextDocumentIdentifier
doc Position
pos Maybe ProgressToken
_workDone Maybe ProgressToken
_partial) = RequestMessage 'TextDocumentDefinition
req
      Position UInt
l UInt
c = Position
pos
      file_path :: Maybe String
file_path = Uri -> Maybe String
uriToFilePath forall a b. (a -> b) -> a -> b
$ TextDocumentIdentifier
doc forall s a. s -> Getting a s a -> a
^. forall s a. HasUri s a => Lens' s a
uri
  forall (m :: * -> *). MonadIO m => LogAction m String
logStringStderr forall (m :: * -> *) msg. LogAction m msg -> msg -> m ()
<& (String
"Got goto definition: " forall a. Semigroup a => a -> a -> a
<> forall a. Show a => a -> String
show (Maybe String
file_path, Position
pos))
  State
state <- IORef State -> Maybe String -> LspT () IO State
tryTakeStateFromIORef IORef State
state_mvar Maybe String
file_path
  case State -> Maybe String -> Int -> Int -> Maybe Location
findDefinitionRange State
state Maybe String
file_path (forall a. Enum a => a -> Int
fromEnum UInt
l forall a. Num a => a -> a -> a
+ Int
1) (forall a. Enum a => a -> Int
fromEnum UInt
c forall a. Num a => a -> a -> a
+ Int
1) of
    Maybe Location
Nothing -> Either
  ResponseError (Location |? (List Location |? List LocationLink))
-> LspT () IO ()
responder forall a b. (a -> b) -> a -> b
$ forall a b. b -> Either a b
Right forall a b. (a -> b) -> a -> b
$ forall a b. b -> a |? b
InR forall a b. (a -> b) -> a -> b
$ forall a b. a -> a |? b
InL forall a b. (a -> b) -> a -> b
$ forall a. [a] -> List a
List []
    Just Location
loc -> Either
  ResponseError (Location |? (List Location |? List LocationLink))
-> LspT () IO ()
responder forall a b. (a -> b) -> a -> b
$ forall a b. b -> Either a b
Right forall a b. (a -> b) -> a -> b
$ forall a b. a -> a |? b
InL Location
loc

onDocumentSaveHandler :: IORef State -> Handlers (LspM ())
onDocumentSaveHandler :: IORef State -> Handlers (LspT () IO)
onDocumentSaveHandler IORef State
state_mvar = forall (m :: Method 'FromClient 'Notification) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
notificationHandler SMethod 'TextDocumentDidSave
STextDocumentDidSave forall a b. (a -> b) -> a -> b
$ \NotificationMessage 'TextDocumentDidSave
msg -> do
  let NotificationMessage Text
_ SMethod 'TextDocumentDidSave
_ (DidSaveTextDocumentParams TextDocumentIdentifier
doc Maybe Text
_text) = NotificationMessage 'TextDocumentDidSave
msg
      file_path :: Maybe String
file_path = Uri -> Maybe String
uriToFilePath forall a b. (a -> b) -> a -> b
$ TextDocumentIdentifier
doc forall s a. s -> Getting a s a -> a
^. forall s a. HasUri s a => Lens' s a
uri
  forall (m :: * -> *). MonadIO m => LogAction m String
logStringStderr forall (m :: * -> *) msg. LogAction m msg -> msg -> m ()
<& (String
"Saved document: " forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show TextDocumentIdentifier
doc)
  IORef State -> Maybe String -> LspT () IO ()
tryReCompile IORef State
state_mvar Maybe String
file_path

onDocumentChangeHandler :: IORef State -> Handlers (LspM ())
onDocumentChangeHandler :: IORef State -> Handlers (LspT () IO)
onDocumentChangeHandler IORef State
state_mvar = forall (m :: Method 'FromClient 'Notification) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
notificationHandler SMethod 'TextDocumentDidChange
STextDocumentDidChange forall a b. (a -> b) -> a -> b
$ \NotificationMessage 'TextDocumentDidChange
msg -> do
  let NotificationMessage Text
_ SMethod 'TextDocumentDidChange
_ (DidChangeTextDocumentParams VersionedTextDocumentIdentifier
doc List TextDocumentContentChangeEvent
_content) = NotificationMessage 'TextDocumentDidChange
msg
      file_path :: Maybe String
file_path = Uri -> Maybe String
uriToFilePath forall a b. (a -> b) -> a -> b
$ VersionedTextDocumentIdentifier
doc forall s a. s -> Getting a s a -> a
^. forall s a. HasUri s a => Lens' s a
uri
  IORef State -> Maybe String -> LspT () IO ()
tryReCompile IORef State
state_mvar Maybe String
file_path

onDocumentOpenHandler :: IORef State -> Handlers (LspM ())
onDocumentOpenHandler :: IORef State -> Handlers (LspT () IO)
onDocumentOpenHandler IORef State
state_mvar = forall (m :: Method 'FromClient 'Notification) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
notificationHandler SMethod 'TextDocumentDidOpen
STextDocumentDidOpen forall a b. (a -> b) -> a -> b
$ \NotificationMessage 'TextDocumentDidOpen
msg -> do
  let NotificationMessage Text
_ SMethod 'TextDocumentDidOpen
_ (DidOpenTextDocumentParams TextDocumentItem
doc) = NotificationMessage 'TextDocumentDidOpen
msg
      file_path :: Maybe String
file_path = Uri -> Maybe String
uriToFilePath forall a b. (a -> b) -> a -> b
$ TextDocumentItem
doc forall s a. s -> Getting a s a -> a
^. forall s a. HasUri s a => Lens' s a
uri
  forall (m :: * -> *). MonadIO m => LogAction m String
logStringStderr forall (m :: * -> *) msg. LogAction m msg -> msg -> m ()
<& (String
"Opened document: " forall a. [a] -> [a] -> [a]
++ forall a. Show a => a -> String
show (TextDocumentItem
doc forall s a. s -> Getting a s a -> a
^. forall s a. HasUri s a => Lens' s a
uri))
  IORef State -> Maybe String -> LspT () IO ()
tryReCompile IORef State
state_mvar Maybe String
file_path

onDocumentCloseHandler :: Handlers (LspM ())
onDocumentCloseHandler :: Handlers (LspT () IO)
onDocumentCloseHandler = forall (m :: Method 'FromClient 'Notification) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
notificationHandler SMethod 'TextDocumentDidClose
STextDocumentDidClose forall a b. (a -> b) -> a -> b
$ \NotificationMessage 'TextDocumentDidClose
_msg ->
  forall (m :: * -> *). MonadIO m => LogAction m String
logStringStderr forall (m :: * -> *) msg. LogAction m msg -> msg -> m ()
<& String
"Closed document"

-- Sent by Eglot when first connecting - not sure when else it might
-- be sent.
onWorkspaceDidChangeConfiguration :: IORef State -> Handlers (LspM ())
onWorkspaceDidChangeConfiguration :: IORef State -> Handlers (LspT () IO)
onWorkspaceDidChangeConfiguration IORef State
_state_mvar =
  forall (m :: Method 'FromClient 'Notification) (f :: * -> *).
SMethod m -> Handler f m -> Handlers f
notificationHandler SMethod 'WorkspaceDidChangeConfiguration
SWorkspaceDidChangeConfiguration forall a b. (a -> b) -> a -> b
$ \NotificationMessage 'WorkspaceDidChangeConfiguration
msg -> do
    let NotificationMessage Text
_ SMethod 'WorkspaceDidChangeConfiguration
_ (DidChangeConfigurationParams Value
_settings) = NotificationMessage 'WorkspaceDidChangeConfiguration
msg
    forall (m :: * -> *). MonadIO m => LogAction m String
logStringStderr forall (m :: * -> *) msg. LogAction m msg -> msg -> m ()
<& String
"WorkspaceDidChangeConfiguration"

-- | Given an 'IORef' tracking the state, produce a set of handlers.
-- When we want to add more features to the language server, this is
-- the thing to change.
handlers :: IORef State -> Handlers (LspM ())
handlers :: IORef State -> Handlers (LspT () IO)
handlers IORef State
state_mvar =
  forall a. Monoid a => [a] -> a
mconcat
    [ Handlers (LspT () IO)
onInitializeHandler,
      IORef State -> Handlers (LspT () IO)
onDocumentOpenHandler IORef State
state_mvar,
      Handlers (LspT () IO)
onDocumentCloseHandler,
      IORef State -> Handlers (LspT () IO)
onDocumentSaveHandler IORef State
state_mvar,
      IORef State -> Handlers (LspT () IO)
onDocumentChangeHandler IORef State
state_mvar,
      IORef State -> Handlers (LspT () IO)
onDocumentFocusHandler IORef State
state_mvar,
      IORef State -> Handlers (LspT () IO)
goToDefinitionHandler IORef State
state_mvar,
      IORef State -> Handlers (LspT () IO)
onHoverHandler IORef State
state_mvar,
      IORef State -> Handlers (LspT () IO)
onWorkspaceDidChangeConfiguration IORef State
state_mvar
    ]