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// RunNonInteractive handles the execution flow when a prompt is provided via CLI flag.
96func (app *App) RunNonInteractive(ctx context.Context, prompt string, quiet bool) error {
97 slog.Info("Running in non-interactive mode")
98
99 ctx, cancel := context.WithCancel(ctx)
100 defer cancel()
101
102 // Start spinner if not in quiet mode
103 var spinner *format.Spinner
104 if !quiet {
105 spinner = format.NewSpinner(ctx, cancel, "Generating")
106 spinner.Start()
107 }
108 // Helper function to stop spinner once
109 stopSpinner := func() {
110 if !quiet && spinner != nil {
111 spinner.Stop()
112 spinner = nil
113 }
114 }
115 defer stopSpinner()
116
117 const maxPromptLengthForTitle = 100
118 titlePrefix := "Non-interactive: "
119 var titleSuffix string
120
121 if len(prompt) > maxPromptLengthForTitle {
122 titleSuffix = prompt[:maxPromptLengthForTitle] + "..."
123 } else {
124 titleSuffix = prompt
125 }
126 title := titlePrefix + titleSuffix
127
128 sess, err := app.Sessions.Create(ctx, title)
129 if err != nil {
130 return fmt.Errorf("failed to create session for non-interactive mode: %w", err)
131 }
132 slog.Info("Created session for non-interactive run", "session_id", sess.ID)
133
134 // Automatically approve all permission requests for this non-interactive session
135 app.Permissions.AutoApproveSession(sess.ID)
136
137 done, err := app.CoderAgent.Run(ctx, sess.ID, prompt)
138 if err != nil {
139 return fmt.Errorf("failed to start agent processing stream: %w", err)
140 }
141
142 messageEvents := app.Messages.Subscribe(ctx)
143 readBts := 0
144
145 for {
146 select {
147 case result := <-done:
148 stopSpinner()
149
150 if result.Error != nil {
151 if errors.Is(result.Error, context.Canceled) || errors.Is(result.Error, agent.ErrRequestCancelled) {
152 slog.Info("Agent processing cancelled", "session_id", sess.ID)
153 return nil
154 }
155 return fmt.Errorf("agent processing failed: %w", result.Error)
156 }
157
158 part := result.Message.Content().String()[readBts:]
159 fmt.Println(part)
160
161 slog.Info("Non-interactive run completed", "session_id", sess.ID)
162 return nil
163
164 case event := <-messageEvents:
165 msg := event.Payload
166 if msg.SessionID == sess.ID && msg.Role == message.Assistant && len(msg.Parts) > 0 {
167 stopSpinner()
168 part := msg.Content().String()[readBts:]
169 fmt.Print(part)
170 readBts += len(part)
171 }
172
173 case <-ctx.Done():
174 stopSpinner()
175 return ctx.Err()
176 }
177 }
178}
179
180func (app *App) UpdateAgentModel() error {
181 return app.CoderAgent.UpdateModel()
182}
183
184func (app *App) setupEvents() {
185 ctx, cancel := context.WithCancel(app.globalCtx)
186 app.eventsCtx = ctx
187 setupSubscriber(ctx, app.serviceEventsWG, "sessions", app.Sessions.Subscribe, app.events)
188 setupSubscriber(ctx, app.serviceEventsWG, "messages", app.Messages.Subscribe, app.events)
189 setupSubscriber(ctx, app.serviceEventsWG, "permissions", app.Permissions.Subscribe, app.events)
190 setupSubscriber(ctx, app.serviceEventsWG, "history", app.History.Subscribe, app.events)
191 cleanupFunc := func() {
192 cancel()
193 app.serviceEventsWG.Wait()
194 }
195 app.cleanupFuncs = append(app.cleanupFuncs, cleanupFunc)
196}
197
198func setupSubscriber[T any](
199 ctx context.Context,
200 wg *sync.WaitGroup,
201 name string,
202 subscriber func(context.Context) <-chan pubsub.Event[T],
203 outputCh chan<- tea.Msg,
204) {
205 wg.Add(1)
206 go func() {
207 defer wg.Done()
208 subCh := subscriber(ctx)
209 for {
210 select {
211 case event, ok := <-subCh:
212 if !ok {
213 slog.Debug("subscription channel closed", "name", name)
214 return
215 }
216 var msg tea.Msg = event
217 select {
218 case outputCh <- msg:
219 case <-time.After(2 * time.Second):
220 slog.Warn("message dropped due to slow consumer", "name", name)
221 case <-ctx.Done():
222 slog.Debug("subscription cancelled", "name", name)
223 return
224 }
225 case <-ctx.Done():
226 slog.Debug("subscription cancelled", "name", name)
227 return
228 }
229 }
230 }()
231}
232
233func (app *App) InitCoderAgent() error {
234 coderAgentCfg := app.config.Agents["coder"]
235 if coderAgentCfg.ID == "" {
236 return fmt.Errorf("coder agent configuration is missing")
237 }
238 var err error
239 app.CoderAgent, err = agent.NewAgent(
240 coderAgentCfg,
241 app.Permissions,
242 app.Sessions,
243 app.Messages,
244 app.History,
245 app.LSPClients,
246 )
247 if err != nil {
248 slog.Error("Failed to create coder agent", "err", err)
249 return err
250 }
251 setupSubscriber(app.eventsCtx, app.serviceEventsWG, "coderAgent", app.CoderAgent.Subscribe, app.events)
252 return nil
253}
254
255func (app *App) Subscribe(program *tea.Program) {
256 defer log.RecoverPanic("app.Subscribe", func() {
257 slog.Info("TUI subscription panic - attempting graceful shutdown")
258 program.Quit()
259 })
260
261 app.tuiWG.Add(1)
262 tuiCtx, tuiCancel := context.WithCancel(app.globalCtx)
263 app.cleanupFuncs = append(app.cleanupFuncs, func() {
264 slog.Debug("Cancelling TUI message handler")
265 tuiCancel()
266 app.tuiWG.Wait()
267 })
268 defer app.tuiWG.Done()
269 for {
270 select {
271 case <-tuiCtx.Done():
272 slog.Debug("TUI message handler shutting down")
273 return
274 case msg, ok := <-app.events:
275 if !ok {
276 slog.Debug("TUI message channel closed")
277 return
278 }
279 program.Send(msg)
280 }
281 }
282}
283
284// Shutdown performs a clean shutdown of the application
285func (app *App) Shutdown() {
286 if app.CoderAgent != nil {
287 app.CoderAgent.CancelAll()
288 }
289 app.cancelFuncsMutex.Lock()
290 for _, cancel := range app.watcherCancelFuncs {
291 cancel()
292 }
293 app.cancelFuncsMutex.Unlock()
294 app.lspWatcherWG.Wait()
295
296 app.clientsMutex.RLock()
297 clients := make(map[string]*lsp.Client, len(app.LSPClients))
298 maps.Copy(clients, app.LSPClients)
299 app.clientsMutex.RUnlock()
300
301 for name, client := range clients {
302 shutdownCtx, cancel := context.WithTimeout(app.globalCtx, 5*time.Second)
303 if err := client.Shutdown(shutdownCtx); err != nil {
304 slog.Error("Failed to shutdown LSP client", "name", name, "error", err)
305 }
306 cancel()
307 }
308
309 for _, cleanup := range app.cleanupFuncs {
310 if cleanup != nil {
311 cleanup()
312 }
313 }
314}