1package app
2
3import (
4 "context"
5 "database/sql"
6 "errors"
7 "fmt"
8 "log/slog"
9 "maps"
10 "sync"
11 "time"
12
13 tea "github.com/charmbracelet/bubbletea/v2"
14 "github.com/charmbracelet/crush/internal/config"
15 "github.com/charmbracelet/crush/internal/db"
16 "github.com/charmbracelet/crush/internal/format"
17 "github.com/charmbracelet/crush/internal/history"
18 "github.com/charmbracelet/crush/internal/llm/agent"
19 "github.com/charmbracelet/crush/internal/log"
20 "github.com/charmbracelet/crush/internal/pubsub"
21
22 "github.com/charmbracelet/crush/internal/lsp"
23 "github.com/charmbracelet/crush/internal/message"
24 "github.com/charmbracelet/crush/internal/permission"
25 "github.com/charmbracelet/crush/internal/session"
26)
27
28type App struct {
29 Sessions session.Service
30 Messages message.Service
31 History history.Service
32 Permissions permission.Service
33
34 CoderAgent agent.Service
35
36 LSPClients map[string]*lsp.Client
37
38 clientsMutex sync.RWMutex
39
40 watcherCancelFuncs []context.CancelFunc
41 cancelFuncsMutex sync.Mutex
42 lspWatcherWG sync.WaitGroup
43
44 config *config.Config
45
46 serviceEventsWG *sync.WaitGroup
47 eventsCtx context.Context
48 events chan tea.Msg
49 tuiWG *sync.WaitGroup
50
51 // global context and cleanup functions
52 globalCtx context.Context
53 cleanupFuncs []func()
54}
55
56func New(ctx context.Context, conn *sql.DB, cfg *config.Config) (*App, error) {
57 q := db.New(conn)
58 sessions := session.NewService(q)
59 messages := message.NewService(q)
60 files := history.NewService(q, conn)
61
62 app := &App{
63 Sessions: sessions,
64 Messages: messages,
65 History: files,
66 Permissions: permission.NewPermissionService(cfg.WorkingDir()),
67 LSPClients: make(map[string]*lsp.Client),
68
69 globalCtx: ctx,
70
71 config: cfg,
72
73 events: make(chan tea.Msg, 100),
74 serviceEventsWG: &sync.WaitGroup{},
75 tuiWG: &sync.WaitGroup{},
76 }
77
78 app.setupEvents()
79
80 // Initialize LSP clients in the background
81 go app.initLSPClients(ctx)
82
83 // TODO: remove the concept of agent config most likely
84 if cfg.IsConfigured() {
85 if err := app.InitCoderAgent(); err != nil {
86 return nil, fmt.Errorf("failed to initialize coder agent: %w", err)
87 }
88 } else {
89 slog.Warn("No agent configuration found")
90 }
91 return app, nil
92}
93
94// RunNonInteractive handles the execution flow when a prompt is provided via CLI flag.
95func (a *App) RunNonInteractive(ctx context.Context, prompt string, quiet bool) error {
96 slog.Info("Running in non-interactive mode")
97
98 ctx, cancel := context.WithCancel(ctx)
99 defer cancel()
100
101 // Start spinner if not in quiet mode
102 var spinner *format.Spinner
103 if !quiet {
104 spinner = format.NewSpinner(ctx, cancel, "Generating")
105 spinner.Start()
106 }
107 // Helper function to stop spinner once
108 stopSpinner := func() {
109 if !quiet && spinner != nil {
110 spinner.Stop()
111 spinner = nil
112 }
113 }
114 defer stopSpinner()
115
116 const maxPromptLengthForTitle = 100
117 titlePrefix := "Non-interactive: "
118 var titleSuffix string
119
120 if len(prompt) > maxPromptLengthForTitle {
121 titleSuffix = prompt[:maxPromptLengthForTitle] + "..."
122 } else {
123 titleSuffix = prompt
124 }
125 title := titlePrefix + titleSuffix
126
127 sess, err := a.Sessions.Create(ctx, title)
128 if err != nil {
129 return fmt.Errorf("failed to create session for non-interactive mode: %w", err)
130 }
131 slog.Info("Created session for non-interactive run", "session_id", sess.ID)
132
133 // Automatically approve all permission requests for this non-interactive session
134 a.Permissions.AutoApproveSession(sess.ID)
135
136 done, err := a.CoderAgent.Run(ctx, sess.ID, prompt)
137 if err != nil {
138 return fmt.Errorf("failed to start agent processing stream: %w", err)
139 }
140
141 messageEvents := a.Messages.Subscribe(ctx)
142 readBts := 0
143
144 for {
145 select {
146 case result := <-done:
147 stopSpinner()
148
149 if result.Error != nil {
150 if errors.Is(result.Error, context.Canceled) || errors.Is(result.Error, agent.ErrRequestCancelled) {
151 slog.Info("Agent processing cancelled", "session_id", sess.ID)
152 return nil
153 }
154 return fmt.Errorf("agent processing failed: %w", result.Error)
155 }
156
157 part := result.Message.Content().String()[readBts:]
158 fmt.Println(part)
159
160 slog.Info("Non-interactive run completed", "session_id", sess.ID)
161 return nil
162
163 case event := <-messageEvents:
164 msg := event.Payload
165 if msg.SessionID == sess.ID && msg.Role == message.Assistant && len(msg.Parts) > 0 {
166 stopSpinner()
167 part := msg.Content().String()[readBts:]
168 fmt.Print(part)
169 readBts += len(part)
170 }
171
172 case <-ctx.Done():
173 stopSpinner()
174 return ctx.Err()
175 }
176 }
177}
178
179func (app *App) UpdateAgentModel() error {
180 return app.CoderAgent.UpdateModel()
181}
182
183func (app *App) setupEvents() {
184 ctx, cancel := context.WithCancel(app.globalCtx)
185 app.eventsCtx = ctx
186 setupSubscriber(ctx, app.serviceEventsWG, "sessions", app.Sessions.Subscribe, app.events)
187 setupSubscriber(ctx, app.serviceEventsWG, "messages", app.Messages.Subscribe, app.events)
188 setupSubscriber(ctx, app.serviceEventsWG, "permissions", app.Permissions.Subscribe, app.events)
189 setupSubscriber(ctx, app.serviceEventsWG, "history", app.History.Subscribe, app.events)
190 cleanupFunc := func() {
191 cancel()
192 app.serviceEventsWG.Wait()
193 }
194 app.cleanupFuncs = append(app.cleanupFuncs, cleanupFunc)
195}
196
197func setupSubscriber[T any](
198 ctx context.Context,
199 wg *sync.WaitGroup,
200 name string,
201 subscriber func(context.Context) <-chan pubsub.Event[T],
202 outputCh chan<- tea.Msg,
203) {
204 wg.Add(1)
205 go func() {
206 defer wg.Done()
207 subCh := subscriber(ctx)
208 for {
209 select {
210 case event, ok := <-subCh:
211 if !ok {
212 slog.Debug("subscription channel closed", "name", name)
213 return
214 }
215 var msg tea.Msg = event
216 select {
217 case outputCh <- msg:
218 case <-time.After(2 * time.Second):
219 slog.Warn("message dropped due to slow consumer", "name", name)
220 case <-ctx.Done():
221 slog.Debug("subscription cancelled", "name", name)
222 return
223 }
224 case <-ctx.Done():
225 slog.Debug("subscription cancelled", "name", name)
226 return
227 }
228 }
229 }()
230}
231
232func (app *App) InitCoderAgent() error {
233 coderAgentCfg := app.config.Agents["coder"]
234 if coderAgentCfg.ID == "" {
235 return fmt.Errorf("coder agent configuration is missing")
236 }
237 var err error
238 app.CoderAgent, err = agent.NewAgent(
239 coderAgentCfg,
240 app.Permissions,
241 app.Sessions,
242 app.Messages,
243 app.History,
244 app.LSPClients,
245 )
246 if err != nil {
247 slog.Error("Failed to create coder agent", "err", err)
248 return err
249 }
250 setupSubscriber(app.eventsCtx, app.serviceEventsWG, "coderAgent", app.CoderAgent.Subscribe, app.events)
251 return nil
252}
253
254func (app *App) Subscribe(program *tea.Program) {
255 defer log.RecoverPanic("app.Subscribe", func() {
256 slog.Info("TUI subscription panic - attempting graceful shutdown")
257 program.Quit()
258 })
259
260 app.tuiWG.Add(1)
261 tuiCtx, tuiCancel := context.WithCancel(app.globalCtx)
262 app.cleanupFuncs = append(app.cleanupFuncs, func() {
263 slog.Debug("Cancelling TUI message handler")
264 tuiCancel()
265 app.tuiWG.Wait()
266 })
267 defer app.tuiWG.Done()
268 for {
269 select {
270 case <-tuiCtx.Done():
271 slog.Debug("TUI message handler shutting down")
272 return
273 case msg, ok := <-app.events:
274 if !ok {
275 slog.Debug("TUI message channel closed")
276 return
277 }
278 program.Send(msg)
279 }
280 }
281}
282
283// Shutdown performs a clean shutdown of the application
284func (app *App) Shutdown() {
285 if app.CoderAgent != nil {
286 app.CoderAgent.CancelAll()
287 }
288 app.cancelFuncsMutex.Lock()
289 for _, cancel := range app.watcherCancelFuncs {
290 cancel()
291 }
292 app.cancelFuncsMutex.Unlock()
293 app.lspWatcherWG.Wait()
294
295 app.clientsMutex.RLock()
296 clients := make(map[string]*lsp.Client, len(app.LSPClients))
297 maps.Copy(clients, app.LSPClients)
298 app.clientsMutex.RUnlock()
299
300 for name, client := range clients {
301 shutdownCtx, cancel := context.WithTimeout(app.globalCtx, 5*time.Second)
302 if err := client.Shutdown(shutdownCtx); err != nil {
303 slog.Error("Failed to shutdown LSP client", "name", name, "error", err)
304 }
305 cancel()
306 }
307
308 for _, cleanup := range app.cleanupFuncs {
309 if cleanup != nil {
310 cleanup()
311 }
312 }
313}