1package app
2
3import (
4 "context"
5 "database/sql"
6 "errors"
7 "fmt"
8 "log/slog"
9 "sync"
10 "time"
11
12 "charm.land/fantasy"
13 tea "github.com/charmbracelet/bubbletea/v2"
14 "git.secluded.site/crush/internal/agent"
15 "git.secluded.site/crush/internal/agent/tools"
16 "git.secluded.site/crush/internal/config"
17 "git.secluded.site/crush/internal/csync"
18 "git.secluded.site/crush/internal/db"
19 "git.secluded.site/crush/internal/format"
20 "git.secluded.site/crush/internal/history"
21 "git.secluded.site/crush/internal/log"
22 "git.secluded.site/crush/internal/lsp"
23 "git.secluded.site/crush/internal/message"
24 "git.secluded.site/crush/internal/notification"
25 "git.secluded.site/crush/internal/permission"
26 "git.secluded.site/crush/internal/pubsub"
27 "git.secluded.site/crush/internal/session"
28 "github.com/charmbracelet/x/ansi"
29)
30
31type App struct {
32 Sessions session.Service
33 Messages message.Service
34 History history.Service
35 Permissions permission.Service
36
37 AgentCoordinator agent.Coordinator
38 Notifier *notification.Notifier
39
40 LSPClients *csync.Map[string, *lsp.Client]
41
42 config *config.Config
43
44 serviceEventsWG *sync.WaitGroup
45 eventsCtx context.Context
46 events chan tea.Msg
47 tuiWG *sync.WaitGroup
48
49 // global context and cleanup functions
50 globalCtx context.Context
51 cleanupFuncs []func() error
52}
53
54// New initializes a new applcation instance.
55func New(ctx context.Context, conn *sql.DB, cfg *config.Config) (*App, error) {
56 q := db.New(conn)
57 sessions := session.NewService(q)
58 messages := message.NewService(q)
59 files := history.NewService(q, conn)
60 skipPermissionsRequests := cfg.Permissions != nil && cfg.Permissions.SkipRequests
61 allowedTools := []string{}
62 if cfg.Permissions != nil && cfg.Permissions.AllowedTools != nil {
63 allowedTools = cfg.Permissions.AllowedTools
64 }
65
66 // Enable notifications by default, disable if configured.
67 notificationsEnabled := cfg.Options == nil || !cfg.Options.DisableNotifications
68
69 notifier := notification.New(notificationsEnabled)
70 permissions := permission.NewPermissionService(ctx, cfg.WorkingDir(), skipPermissionsRequests, allowedTools, notifier)
71
72 app := &App{
73 Sessions: sessions,
74 Messages: messages,
75 History: files,
76 Permissions: permissions,
77 Notifier: notifier,
78 LSPClients: csync.NewMap[string, *lsp.Client](),
79
80 globalCtx: ctx,
81
82 config: cfg,
83
84 events: make(chan tea.Msg, 100),
85 serviceEventsWG: &sync.WaitGroup{},
86 tuiWG: &sync.WaitGroup{},
87 }
88
89 app.setupEvents()
90
91 // Initialize LSP clients in the background.
92 app.initLSPClients(ctx)
93
94 // cleanup database upon app shutdown
95 app.cleanupFuncs = append(app.cleanupFuncs, conn.Close)
96
97 // TODO: remove the concept of agent config, most likely.
98 if !cfg.IsConfigured() {
99 slog.Warn("No agent configuration found")
100 return app, nil
101 }
102 if err := app.InitCoderAgent(ctx); err != nil {
103 return nil, fmt.Errorf("failed to initialize coder agent: %w", err)
104 }
105 return app, nil
106}
107
108// Config returns the application configuration.
109func (app *App) Config() *config.Config {
110 return app.config
111}
112
113// RunNonInteractive handles the execution flow when a prompt is provided via
114// CLI flag.
115func (app *App) RunNonInteractive(ctx context.Context, prompt string, quiet bool) error {
116 slog.Info("Running in non-interactive mode")
117
118 ctx, cancel := context.WithCancel(ctx)
119 defer cancel()
120
121 var spinner *format.Spinner
122 if !quiet {
123 spinner = format.NewSpinner(ctx, cancel, "Generating")
124 spinner.Start()
125 }
126
127 // Helper function to stop spinner once.
128 stopSpinner := func() {
129 if !quiet && spinner != nil {
130 spinner.Stop()
131 spinner = nil
132 }
133 }
134 defer stopSpinner()
135
136 const maxPromptLengthForTitle = 100
137 titlePrefix := "Non-interactive: "
138 var titleSuffix string
139
140 if len(prompt) > maxPromptLengthForTitle {
141 titleSuffix = prompt[:maxPromptLengthForTitle] + "..."
142 } else {
143 titleSuffix = prompt
144 }
145 title := titlePrefix + titleSuffix
146
147 sess, err := app.Sessions.Create(ctx, title)
148 if err != nil {
149 return fmt.Errorf("failed to create session for non-interactive mode: %w", err)
150 }
151 slog.Info("Created session for non-interactive run", "session_id", sess.ID)
152
153 // Automatically approve all permission requests for this non-interactive session
154 app.Permissions.AutoApproveSession(sess.ID)
155
156 type response struct {
157 result *fantasy.AgentResult
158 err error
159 }
160 done := make(chan response, 1)
161
162 go func(ctx context.Context, sessionID, prompt string) {
163 result, err := app.AgentCoordinator.Run(ctx, sess.ID, prompt)
164 if err != nil {
165 done <- response{
166 err: fmt.Errorf("failed to start agent processing stream: %w", err),
167 }
168 }
169 done <- response{
170 result: result,
171 }
172 }(ctx, sess.ID, prompt)
173
174 messageEvents := app.Messages.Subscribe(ctx)
175 messageReadBytes := make(map[string]int)
176
177 defer fmt.Printf(ansi.ResetProgressBar)
178 for {
179 // HACK: add it again on every iteration so it doesn't get hidden by
180 // the terminal due to inactivity.
181 fmt.Printf(ansi.SetIndeterminateProgressBar)
182 select {
183 case result := <-done:
184 stopSpinner()
185 if result.err != nil {
186 if errors.Is(result.err, context.Canceled) || errors.Is(result.err, agent.ErrRequestCancelled) {
187 slog.Info("Non-interactive: agent processing cancelled", "session_id", sess.ID)
188 return nil
189 }
190 return fmt.Errorf("agent processing failed: %w", result.err)
191 }
192 return nil
193
194 case event := <-messageEvents:
195 msg := event.Payload
196 if msg.SessionID == sess.ID && msg.Role == message.Assistant && len(msg.Parts) > 0 {
197 stopSpinner()
198
199 content := msg.Content().String()
200 readBytes := messageReadBytes[msg.ID]
201
202 if len(content) < readBytes {
203 slog.Error("Non-interactive: message content is shorter than read bytes", "message_length", len(content), "read_bytes", readBytes)
204 return fmt.Errorf("message content is shorter than read bytes: %d < %d", len(content), readBytes)
205 }
206
207 part := content[readBytes:]
208 fmt.Print(part)
209 messageReadBytes[msg.ID] = len(content)
210 }
211
212 case <-ctx.Done():
213 stopSpinner()
214 return ctx.Err()
215 }
216 }
217}
218
219func (app *App) UpdateAgentModel(ctx context.Context) error {
220 return app.AgentCoordinator.UpdateModels(ctx)
221}
222
223func (app *App) setupEvents() {
224 ctx, cancel := context.WithCancel(app.globalCtx)
225 app.eventsCtx = ctx
226 setupSubscriber(ctx, app.serviceEventsWG, "sessions", app.Sessions.Subscribe, app.events)
227 setupSubscriber(ctx, app.serviceEventsWG, "messages", app.Messages.Subscribe, app.events)
228 setupSubscriber(ctx, app.serviceEventsWG, "permissions", app.Permissions.Subscribe, app.events)
229 setupSubscriber(ctx, app.serviceEventsWG, "permissions-notifications", app.Permissions.SubscribeNotifications, app.events)
230 setupSubscriber(ctx, app.serviceEventsWG, "history", app.History.Subscribe, app.events)
231 setupSubscriber(ctx, app.serviceEventsWG, "mcp", tools.SubscribeMCPEvents, app.events)
232 setupSubscriber(ctx, app.serviceEventsWG, "lsp", SubscribeLSPEvents, app.events)
233 cleanupFunc := func() error {
234 cancel()
235 app.serviceEventsWG.Wait()
236 return nil
237 }
238 app.cleanupFuncs = append(app.cleanupFuncs, cleanupFunc)
239}
240
241func setupSubscriber[T any](
242 ctx context.Context,
243 wg *sync.WaitGroup,
244 name string,
245 subscriber func(context.Context) <-chan pubsub.Event[T],
246 outputCh chan<- tea.Msg,
247) {
248 wg.Go(func() {
249 subCh := subscriber(ctx)
250 for {
251 select {
252 case event, ok := <-subCh:
253 if !ok {
254 slog.Debug("subscription channel closed", "name", name)
255 return
256 }
257 var msg tea.Msg = event
258 select {
259 case outputCh <- msg:
260 case <-time.After(2 * time.Second):
261 slog.Warn("message dropped due to slow consumer", "name", name)
262 case <-ctx.Done():
263 slog.Debug("subscription cancelled", "name", name)
264 return
265 }
266 case <-ctx.Done():
267 slog.Debug("subscription cancelled", "name", name)
268 return
269 }
270 }
271 })
272}
273
274func (app *App) InitCoderAgent(ctx context.Context) error {
275 coderAgentCfg := app.config.Agents[config.AgentCoder]
276 if coderAgentCfg.ID == "" {
277 return fmt.Errorf("coder agent configuration is missing")
278 }
279 var err error
280 app.AgentCoordinator, err = agent.NewCoordinator(
281 ctx,
282 app.config,
283 app.Sessions,
284 app.Messages,
285 app.Permissions,
286 app.History,
287 app.LSPClients,
288 app.Notifier,
289 )
290 if err != nil {
291 slog.Error("Failed to create coder agent", "err", err)
292 return err
293 }
294
295 // Add MCP client cleanup to shutdown process
296 app.cleanupFuncs = append(app.cleanupFuncs, tools.CloseMCPClients)
297 return nil
298}
299
300// Subscribe sends events to the TUI as tea.Msgs.
301func (app *App) Subscribe(program *tea.Program) {
302 defer log.RecoverPanic("app.Subscribe", func() {
303 slog.Info("TUI subscription panic: attempting graceful shutdown")
304 program.Quit()
305 })
306
307 app.tuiWG.Add(1)
308 tuiCtx, tuiCancel := context.WithCancel(app.globalCtx)
309 app.cleanupFuncs = append(app.cleanupFuncs, func() error {
310 slog.Debug("Cancelling TUI message handler")
311 tuiCancel()
312 app.tuiWG.Wait()
313 return nil
314 })
315 defer app.tuiWG.Done()
316
317 for {
318 select {
319 case <-tuiCtx.Done():
320 slog.Debug("TUI message handler shutting down")
321 return
322 case msg, ok := <-app.events:
323 if !ok {
324 slog.Debug("TUI message channel closed")
325 return
326 }
327 program.Send(msg)
328 }
329 }
330}
331
332// Shutdown performs a graceful shutdown of the application.
333func (app *App) Shutdown() {
334 if app.AgentCoordinator != nil {
335 app.AgentCoordinator.CancelAll()
336 }
337
338 // Shutdown all LSP clients.
339 for name, client := range app.LSPClients.Seq2() {
340 shutdownCtx, cancel := context.WithTimeout(app.globalCtx, 5*time.Second)
341 if err := client.Close(shutdownCtx); err != nil {
342 slog.Error("Failed to shutdown LSP client", "name", name, "error", err)
343 }
344 cancel()
345 }
346
347 // Call call cleanup functions.
348 for _, cleanup := range app.cleanupFuncs {
349 if cleanup != nil {
350 if err := cleanup(); err != nil {
351 slog.Error("Failed to cleanup app properly on shutdown", "error", err)
352 }
353 }
354 }
355}