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package lsp
import (
"bufio"
"encoding/json"
"hexai/internal/llm"
"hexai/internal/logging"
"io"
"log"
"sync"
"time"
)
// Server implements a minimal LSP over stdio.
type Server struct {
in *bufio.Reader
out io.Writer
logger *log.Logger
exited bool
mu sync.RWMutex
docs map[string]*document
logContext bool
llmClient llm.Client
lastInput time.Time
maxTokens int
contextMode string
windowLines int
maxContextTokens int
noDiskIO bool
// LLM request stats
llmReqTotal int64
llmSentBytesTotal int64
llmRespTotal int64
llmRespBytesTotal int64
startTime time.Time
}
// ServerOptions collects configuration for NewServer to avoid long parameter lists.
type ServerOptions struct {
LogContext bool
MaxTokens int
ContextMode string
WindowLines int
MaxContextTokens int
NoDiskIO bool
Client llm.Client
}
func NewServer(r io.Reader, w io.Writer, logger *log.Logger, opts ServerOptions) *Server {
s := &Server{in: bufio.NewReader(r), out: w, logger: logger, docs: make(map[string]*document), logContext: opts.LogContext}
maxTokens := opts.MaxTokens
if maxTokens <= 0 { maxTokens = 500 }
s.maxTokens = maxTokens
contextMode := opts.ContextMode
if contextMode == "" { contextMode = "file-on-new-func" }
windowLines := opts.WindowLines
if windowLines <= 0 { windowLines = 120 }
maxContextTokens := opts.MaxContextTokens
if maxContextTokens <= 0 { maxContextTokens = 2000 }
s.contextMode = contextMode
s.windowLines = windowLines
s.maxContextTokens = maxContextTokens
s.noDiskIO = opts.NoDiskIO
s.startTime = time.Now()
s.llmClient = opts.Client
return s
}
func (s *Server) Run() error {
for {
body, err := s.readMessage()
if err == io.EOF {
return nil
}
if err != nil {
return err
}
var req Request
if err := json.Unmarshal(body, &req); err != nil {
logging.Logf("lsp ", "invalid JSON: %v", err)
continue
}
if req.Method == "" {
// A response from client; ignore
continue
}
go s.handle(req)
if s.exited {
return nil
}
}
}
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