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 skipPermissionsRequests := cfg.Options != nil && cfg.Options.SkipPermissionsRequests
62
63 app := &App{
64 Sessions: sessions,
65 Messages: messages,
66 History: files,
67 Permissions: permission.NewPermissionService(cfg.WorkingDir(), skipPermissionsRequests),
68 LSPClients: make(map[string]*lsp.Client),
69
70 globalCtx: ctx,
71
72 config: cfg,
73
74 events: make(chan tea.Msg, 100),
75 serviceEventsWG: &sync.WaitGroup{},
76 tuiWG: &sync.WaitGroup{},
77 }
78
79 app.setupEvents()
80
81 // Initialize LSP clients in the background
82 go app.initLSPClients(ctx)
83
84 // TODO: remove the concept of agent config most likely
85 if cfg.IsConfigured() {
86 if err := app.InitCoderAgent(); err != nil {
87 return nil, fmt.Errorf("failed to initialize coder agent: %w", err)
88 }
89 } else {
90 slog.Warn("No agent configuration found")
91 }
92 return app, nil
93}
94
95// Config returns the application configuration.
96func (app *App) Config() *config.Config {
97 return app.config
98}
99
100// RunNonInteractive handles the execution flow when a prompt is provided via CLI flag.
101func (app *App) RunNonInteractive(ctx context.Context, prompt string, quiet bool) error {
102 slog.Info("Running in non-interactive mode")
103
104 ctx, cancel := context.WithCancel(ctx)
105 defer cancel()
106
107 // Start spinner if not in quiet mode
108 var spinner *format.Spinner
109 if !quiet {
110 spinner = format.NewSpinner(ctx, cancel, "Generating")
111 spinner.Start()
112 }
113 // Helper function to stop spinner once
114 stopSpinner := func() {
115 if !quiet && spinner != nil {
116 spinner.Stop()
117 spinner = nil
118 }
119 }
120 defer stopSpinner()
121
122 const maxPromptLengthForTitle = 100
123 titlePrefix := "Non-interactive: "
124 var titleSuffix string
125
126 if len(prompt) > maxPromptLengthForTitle {
127 titleSuffix = prompt[:maxPromptLengthForTitle] + "..."
128 } else {
129 titleSuffix = prompt
130 }
131 title := titlePrefix + titleSuffix
132
133 sess, err := app.Sessions.Create(ctx, title)
134 if err != nil {
135 return fmt.Errorf("failed to create session for non-interactive mode: %w", err)
136 }
137 slog.Info("Created session for non-interactive run", "session_id", sess.ID)
138
139 // Automatically approve all permission requests for this non-interactive session
140 app.Permissions.AutoApproveSession(sess.ID)
141
142 done, err := app.CoderAgent.Run(ctx, sess.ID, prompt)
143 if err != nil {
144 return fmt.Errorf("failed to start agent processing stream: %w", err)
145 }
146
147 messageEvents := app.Messages.Subscribe(ctx)
148 readBts := 0
149
150 for {
151 select {
152 case result := <-done:
153 stopSpinner()
154
155 if result.Error != nil {
156 if errors.Is(result.Error, context.Canceled) || errors.Is(result.Error, agent.ErrRequestCancelled) {
157 slog.Info("Non-interactive: agent processing cancelled", "session_id", sess.ID)
158 return nil
159 }
160 return fmt.Errorf("agent processing failed: %w", result.Error)
161 }
162
163 msgContent := result.Message.Content().String()
164 if len(msgContent) < readBts {
165 slog.Error("Non-interacgive: message content is shorter than read bytes", "message_length", len(msgContent), "read_bytes", readBts)
166 return fmt.Errorf("message content is shorter than read bytes: %d < %d", len(msgContent), readBts)
167 }
168 fmt.Println(msgContent[readBts:])
169
170 slog.Info("Non-interactive: run completed", "session_id", sess.ID)
171 return nil
172
173 case event := <-messageEvents:
174 msg := event.Payload
175 if msg.SessionID == sess.ID && msg.Role == message.Assistant && len(msg.Parts) > 0 {
176 stopSpinner()
177 part := msg.Content().String()[readBts:]
178 fmt.Print(part)
179 readBts += len(part)
180 }
181
182 case <-ctx.Done():
183 stopSpinner()
184 return ctx.Err()
185 }
186 }
187}
188
189func (app *App) UpdateAgentModel() error {
190 return app.CoderAgent.UpdateModel()
191}
192
193func (app *App) setupEvents() {
194 ctx, cancel := context.WithCancel(app.globalCtx)
195 app.eventsCtx = ctx
196 setupSubscriber(ctx, app.serviceEventsWG, "sessions", app.Sessions.Subscribe, app.events)
197 setupSubscriber(ctx, app.serviceEventsWG, "messages", app.Messages.Subscribe, app.events)
198 setupSubscriber(ctx, app.serviceEventsWG, "permissions", app.Permissions.Subscribe, app.events)
199 setupSubscriber(ctx, app.serviceEventsWG, "history", app.History.Subscribe, app.events)
200 cleanupFunc := func() {
201 cancel()
202 app.serviceEventsWG.Wait()
203 }
204 app.cleanupFuncs = append(app.cleanupFuncs, cleanupFunc)
205}
206
207func setupSubscriber[T any](
208 ctx context.Context,
209 wg *sync.WaitGroup,
210 name string,
211 subscriber func(context.Context) <-chan pubsub.Event[T],
212 outputCh chan<- tea.Msg,
213) {
214 wg.Add(1)
215 go func() {
216 defer wg.Done()
217 subCh := subscriber(ctx)
218 for {
219 select {
220 case event, ok := <-subCh:
221 if !ok {
222 slog.Debug("subscription channel closed", "name", name)
223 return
224 }
225 var msg tea.Msg = event
226 select {
227 case outputCh <- msg:
228 case <-time.After(2 * time.Second):
229 slog.Warn("message dropped due to slow consumer", "name", name)
230 case <-ctx.Done():
231 slog.Debug("subscription cancelled", "name", name)
232 return
233 }
234 case <-ctx.Done():
235 slog.Debug("subscription cancelled", "name", name)
236 return
237 }
238 }
239 }()
240}
241
242func (app *App) InitCoderAgent() error {
243 coderAgentCfg := app.config.Agents["coder"]
244 if coderAgentCfg.ID == "" {
245 return fmt.Errorf("coder agent configuration is missing")
246 }
247 var err error
248 app.CoderAgent, err = agent.NewAgent(
249 coderAgentCfg,
250 app.Permissions,
251 app.Sessions,
252 app.Messages,
253 app.History,
254 app.LSPClients,
255 )
256 if err != nil {
257 slog.Error("Failed to create coder agent", "err", err)
258 return err
259 }
260 setupSubscriber(app.eventsCtx, app.serviceEventsWG, "coderAgent", app.CoderAgent.Subscribe, app.events)
261 return nil
262}
263
264func (app *App) Subscribe(program *tea.Program) {
265 defer log.RecoverPanic("app.Subscribe", func() {
266 slog.Info("TUI subscription panic - attempting graceful shutdown")
267 program.Quit()
268 })
269
270 app.tuiWG.Add(1)
271 tuiCtx, tuiCancel := context.WithCancel(app.globalCtx)
272 app.cleanupFuncs = append(app.cleanupFuncs, func() {
273 slog.Debug("Cancelling TUI message handler")
274 tuiCancel()
275 app.tuiWG.Wait()
276 })
277 defer app.tuiWG.Done()
278 for {
279 select {
280 case <-tuiCtx.Done():
281 slog.Debug("TUI message handler shutting down")
282 return
283 case msg, ok := <-app.events:
284 if !ok {
285 slog.Debug("TUI message channel closed")
286 return
287 }
288 program.Send(msg)
289 }
290 }
291}
292
293// Shutdown performs a clean shutdown of the application
294func (app *App) Shutdown() {
295 if app.CoderAgent != nil {
296 app.CoderAgent.CancelAll()
297 }
298 app.cancelFuncsMutex.Lock()
299 for _, cancel := range app.watcherCancelFuncs {
300 cancel()
301 }
302 app.cancelFuncsMutex.Unlock()
303 app.lspWatcherWG.Wait()
304
305 app.clientsMutex.RLock()
306 clients := make(map[string]*lsp.Client, len(app.LSPClients))
307 maps.Copy(clients, app.LSPClients)
308 app.clientsMutex.RUnlock()
309
310 for name, client := range clients {
311 shutdownCtx, cancel := context.WithTimeout(app.globalCtx, 5*time.Second)
312 if err := client.Shutdown(shutdownCtx); err != nil {
313 slog.Error("Failed to shutdown LSP client", "name", name, "error", err)
314 }
315 cancel()
316 }
317
318 for _, cleanup := range app.cleanupFuncs {
319 if cleanup != nil {
320 cleanup()
321 }
322 }
323}