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("Agent processing cancelled", "session_id", sess.ID)
158 return nil
159 }
160 return fmt.Errorf("agent processing failed: %w", result.Error)
161 }
162
163 part := result.Message.Content().String()[readBts:]
164 fmt.Println(part)
165
166 slog.Info("Non-interactive run completed", "session_id", sess.ID)
167 return nil
168
169 case event := <-messageEvents:
170 msg := event.Payload
171 if msg.SessionID == sess.ID && msg.Role == message.Assistant && len(msg.Parts) > 0 {
172 stopSpinner()
173 part := msg.Content().String()[readBts:]
174 fmt.Print(part)
175 readBts += len(part)
176 }
177
178 case <-ctx.Done():
179 stopSpinner()
180 return ctx.Err()
181 }
182 }
183}
184
185func (app *App) UpdateAgentModel() error {
186 return app.CoderAgent.UpdateModel()
187}
188
189func (app *App) setupEvents() {
190 ctx, cancel := context.WithCancel(app.globalCtx)
191 app.eventsCtx = ctx
192 setupSubscriber(ctx, app.serviceEventsWG, "sessions", app.Sessions.Subscribe, app.events)
193 setupSubscriber(ctx, app.serviceEventsWG, "messages", app.Messages.Subscribe, app.events)
194 setupSubscriber(ctx, app.serviceEventsWG, "permissions", app.Permissions.Subscribe, app.events)
195 setupSubscriber(ctx, app.serviceEventsWG, "history", app.History.Subscribe, app.events)
196 cleanupFunc := func() {
197 cancel()
198 app.serviceEventsWG.Wait()
199 }
200 app.cleanupFuncs = append(app.cleanupFuncs, cleanupFunc)
201}
202
203func setupSubscriber[T any](
204 ctx context.Context,
205 wg *sync.WaitGroup,
206 name string,
207 subscriber func(context.Context) <-chan pubsub.Event[T],
208 outputCh chan<- tea.Msg,
209) {
210 wg.Add(1)
211 go func() {
212 defer wg.Done()
213 subCh := subscriber(ctx)
214 for {
215 select {
216 case event, ok := <-subCh:
217 if !ok {
218 slog.Debug("subscription channel closed", "name", name)
219 return
220 }
221 var msg tea.Msg = event
222 select {
223 case outputCh <- msg:
224 case <-time.After(2 * time.Second):
225 slog.Warn("message dropped due to slow consumer", "name", name)
226 case <-ctx.Done():
227 slog.Debug("subscription cancelled", "name", name)
228 return
229 }
230 case <-ctx.Done():
231 slog.Debug("subscription cancelled", "name", name)
232 return
233 }
234 }
235 }()
236}
237
238func (app *App) InitCoderAgent() error {
239 coderAgentCfg := app.config.Agents["coder"]
240 if coderAgentCfg.ID == "" {
241 return fmt.Errorf("coder agent configuration is missing")
242 }
243 var err error
244 app.CoderAgent, err = agent.NewAgent(
245 coderAgentCfg,
246 app.Permissions,
247 app.Sessions,
248 app.Messages,
249 app.History,
250 app.LSPClients,
251 )
252 if err != nil {
253 slog.Error("Failed to create coder agent", "err", err)
254 return err
255 }
256 setupSubscriber(app.eventsCtx, app.serviceEventsWG, "coderAgent", app.CoderAgent.Subscribe, app.events)
257 return nil
258}
259
260func (app *App) Subscribe(program *tea.Program) {
261 defer log.RecoverPanic("app.Subscribe", func() {
262 slog.Info("TUI subscription panic - attempting graceful shutdown")
263 program.Quit()
264 })
265
266 app.tuiWG.Add(1)
267 tuiCtx, tuiCancel := context.WithCancel(app.globalCtx)
268 app.cleanupFuncs = append(app.cleanupFuncs, func() {
269 slog.Debug("Cancelling TUI message handler")
270 tuiCancel()
271 app.tuiWG.Wait()
272 })
273 defer app.tuiWG.Done()
274 for {
275 select {
276 case <-tuiCtx.Done():
277 slog.Debug("TUI message handler shutting down")
278 return
279 case msg, ok := <-app.events:
280 if !ok {
281 slog.Debug("TUI message channel closed")
282 return
283 }
284 program.Send(msg)
285 }
286 }
287}
288
289// Shutdown performs a clean shutdown of the application
290func (app *App) Shutdown() {
291 if app.CoderAgent != nil {
292 app.CoderAgent.CancelAll()
293 }
294 app.cancelFuncsMutex.Lock()
295 for _, cancel := range app.watcherCancelFuncs {
296 cancel()
297 }
298 app.cancelFuncsMutex.Unlock()
299 app.lspWatcherWG.Wait()
300
301 app.clientsMutex.RLock()
302 clients := make(map[string]*lsp.Client, len(app.LSPClients))
303 maps.Copy(clients, app.LSPClients)
304 app.clientsMutex.RUnlock()
305
306 for name, client := range clients {
307 shutdownCtx, cancel := context.WithTimeout(app.globalCtx, 5*time.Second)
308 if err := client.Shutdown(shutdownCtx); err != nil {
309 slog.Error("Failed to shutdown LSP client", "name", name, "error", err)
310 }
311 cancel()
312 }
313
314 for _, cleanup := range app.cleanupFuncs {
315 if cleanup != nil {
316 cleanup()
317 }
318 }
319}