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// Summary: Hexai LSP runner; configures logging, loads config, builds the LLM client,
// and constructs/runs the LSP server (with injectable factory for tests).
package hexailsp
import (
"io"
"log"
"os"
"strings"
"hexai/internal/appconfig"
"hexai/internal/llm"
"hexai/internal/logging"
"hexai/internal/lsp"
)
// ServerRunner is the minimal interface satisfied by lsp.Server.
type ServerRunner interface{ Run() error }
// ServerFactory creates a ServerRunner. Default uses lsp.NewServer.
type ServerFactory func(r io.Reader, w io.Writer, logger *log.Logger, opts lsp.ServerOptions) ServerRunner
// Run configures logging, loads config, builds the LLM client and runs the LSP server.
// It is thin and delegates to RunWithFactory for testability.
func Run(logPath string, stdin io.Reader, stdout io.Writer, stderr io.Writer) error {
logger := log.New(stderr, "hexai-lsp ", log.LstdFlags|log.Lmsgprefix)
if strings.TrimSpace(logPath) != "" {
f, err := os.OpenFile(logPath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
if err != nil {
logger.Fatalf("failed to open log file: %v", err)
}
defer f.Close()
logger.SetOutput(f)
}
logging.Bind(logger)
cfg := appconfig.Load(logger)
return RunWithFactory(logPath, stdin, stdout, logger, cfg, nil, nil)
}
// RunWithFactory is the testable entrypoint. When client is nil, it is built from cfg+env.
// When factory is nil, lsp.NewServer is used.
func RunWithFactory(logPath string, stdin io.Reader, stdout io.Writer, logger *log.Logger, cfg appconfig.App, client llm.Client, factory ServerFactory) error {
normalizeLoggingConfig(&cfg)
client = buildClientIfNil(cfg, client)
factory = ensureFactory(factory)
opts := makeServerOptions(cfg, strings.TrimSpace(logPath) != "", client)
server := factory(stdin, stdout, logger, opts)
if err := server.Run(); err != nil {
logger.Fatalf("server error: %v", err)
}
return nil
}
// --- helpers to keep RunWithFactory small ---
func normalizeLoggingConfig(cfg *appconfig.App) {
cfg.ContextMode = strings.ToLower(strings.TrimSpace(cfg.ContextMode))
if cfg.LogPreviewLimit >= 0 {
logging.SetLogPreviewLimit(cfg.LogPreviewLimit)
}
}
func buildClientIfNil(cfg appconfig.App, client llm.Client) llm.Client {
if client != nil {
return client
}
llmCfg := llm.Config{
Provider: cfg.Provider,
OpenAIBaseURL: cfg.OpenAIBaseURL,
OpenAIModel: cfg.OpenAIModel,
OpenAITemperature: cfg.OpenAITemperature,
OllamaBaseURL: cfg.OllamaBaseURL,
OllamaModel: cfg.OllamaModel,
OllamaTemperature: cfg.OllamaTemperature,
CopilotBaseURL: cfg.CopilotBaseURL,
CopilotModel: cfg.CopilotModel,
CopilotTemperature: cfg.CopilotTemperature,
}
// Prefer HEXAI_OPENAI_API_KEY; fall back to OPENAI_API_KEY
oaKey := os.Getenv("HEXAI_OPENAI_API_KEY")
if strings.TrimSpace(oaKey) == "" {
oaKey = os.Getenv("OPENAI_API_KEY")
}
// Prefer HEXAI_COPILOT_API_KEY; fall back to COPILOT_API_KEY
cpKey := os.Getenv("HEXAI_COPILOT_API_KEY")
if strings.TrimSpace(cpKey) == "" {
cpKey = os.Getenv("COPILOT_API_KEY")
}
if c, err := llm.NewFromConfig(llmCfg, oaKey, cpKey); err != nil {
logging.Logf("lsp ", "llm disabled: %v", err)
return nil
} else {
logging.Logf("lsp ", "llm enabled provider=%s model=%s", c.Name(), c.DefaultModel())
return c
}
}
func ensureFactory(factory ServerFactory) ServerFactory {
if factory != nil {
return factory
}
return func(r io.Reader, w io.Writer, logger *log.Logger, opts lsp.ServerOptions) ServerRunner {
return lsp.NewServer(r, w, logger, opts)
}
}
func makeServerOptions(cfg appconfig.App, logContext bool, client llm.Client) lsp.ServerOptions {
return lsp.ServerOptions{
LogContext: logContext,
MaxTokens: cfg.MaxTokens,
ContextMode: cfg.ContextMode,
WindowLines: cfg.ContextWindowLines,
MaxContextTokens: cfg.MaxContextTokens,
CodingTemperature: cfg.CodingTemperature,
Client: client,
TriggerCharacters: cfg.TriggerCharacters,
}
}
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