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