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, outputFormat 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("Thinking...")
102 spinner.Start()
103 defer spinner.Stop()
104 }
105
106 const maxPromptLengthForTitle = 100
107 titlePrefix := "Non-interactive: "
108 var titleSuffix string
109
110 if len(prompt) > maxPromptLengthForTitle {
111 titleSuffix = prompt[:maxPromptLengthForTitle] + "..."
112 } else {
113 titleSuffix = prompt
114 }
115 title := titlePrefix + titleSuffix
116
117 sess, err := a.Sessions.Create(ctx, title)
118 if err != nil {
119 return fmt.Errorf("failed to create session for non-interactive mode: %w", err)
120 }
121 slog.Info("Created session for non-interactive run", "session_id", sess.ID)
122
123 // Automatically approve all permission requests for this non-interactive session
124 a.Permissions.AutoApproveSession(sess.ID)
125
126 done, err := a.CoderAgent.Run(ctx, sess.ID, prompt)
127 if err != nil {
128 return fmt.Errorf("failed to start agent processing stream: %w", err)
129 }
130
131 result := <-done
132 if result.Error != nil {
133 if errors.Is(result.Error, context.Canceled) || errors.Is(result.Error, agent.ErrRequestCancelled) {
134 slog.Info("Agent processing cancelled", "session_id", sess.ID)
135 return nil
136 }
137 return fmt.Errorf("agent processing failed: %w", result.Error)
138 }
139
140 // Stop spinner before printing output
141 if !quiet && spinner != nil {
142 spinner.Stop()
143 }
144
145 // Get the text content from the response
146 content := "No content available"
147 if result.Message.Content().String() != "" {
148 content = result.Message.Content().String()
149 }
150
151 fmt.Println(format.FormatOutput(content, outputFormat))
152
153 slog.Info("Non-interactive run completed", "session_id", sess.ID)
154
155 return nil
156}
157
158func (app *App) UpdateAgentModel() error {
159 return app.CoderAgent.UpdateModel()
160}
161
162func (app *App) setupEvents() {
163 ctx, cancel := context.WithCancel(app.globalCtx)
164 app.eventsCtx = ctx
165 setupSubscriber(ctx, app.serviceEventsWG, "sessions", app.Sessions.Subscribe, app.events)
166 setupSubscriber(ctx, app.serviceEventsWG, "messages", app.Messages.Subscribe, app.events)
167 setupSubscriber(ctx, app.serviceEventsWG, "permissions", app.Permissions.Subscribe, app.events)
168 setupSubscriber(ctx, app.serviceEventsWG, "history", app.History.Subscribe, app.events)
169 cleanupFunc := func() {
170 cancel()
171 app.serviceEventsWG.Wait()
172 }
173 app.cleanupFuncs = append(app.cleanupFuncs, cleanupFunc)
174}
175
176func setupSubscriber[T any](
177 ctx context.Context,
178 wg *sync.WaitGroup,
179 name string,
180 subscriber func(context.Context) <-chan pubsub.Event[T],
181 outputCh chan<- tea.Msg,
182) {
183 wg.Add(1)
184 go func() {
185 defer wg.Done()
186 subCh := subscriber(ctx)
187 for {
188 select {
189 case event, ok := <-subCh:
190 if !ok {
191 slog.Debug("subscription channel closed", "name", name)
192 return
193 }
194 var msg tea.Msg = event
195 select {
196 case outputCh <- msg:
197 case <-time.After(2 * time.Second):
198 slog.Warn("message dropped due to slow consumer", "name", name)
199 case <-ctx.Done():
200 slog.Debug("subscription cancelled", "name", name)
201 return
202 }
203 case <-ctx.Done():
204 slog.Debug("subscription cancelled", "name", name)
205 return
206 }
207 }
208 }()
209}
210
211func (app *App) InitCoderAgent() error {
212 coderAgentCfg := app.config.Agents["coder"]
213 if coderAgentCfg.ID == "" {
214 return fmt.Errorf("coder agent configuration is missing")
215 }
216 var err error
217 app.CoderAgent, err = agent.NewAgent(
218 coderAgentCfg,
219 app.Permissions,
220 app.Sessions,
221 app.Messages,
222 app.History,
223 app.LSPClients,
224 )
225 if err != nil {
226 slog.Error("Failed to create coder agent", "err", err)
227 return err
228 }
229 setupSubscriber(app.eventsCtx, app.serviceEventsWG, "coderAgent", app.CoderAgent.Subscribe, app.events)
230 return nil
231}
232
233func (app *App) Subscribe(program *tea.Program) {
234 defer log.RecoverPanic("app.Subscribe", func() {
235 slog.Info("TUI subscription panic - attempting graceful shutdown")
236 program.Quit()
237 })
238
239 app.tuiWG.Add(1)
240 tuiCtx, tuiCancel := context.WithCancel(app.globalCtx)
241 app.cleanupFuncs = append(app.cleanupFuncs, func() {
242 slog.Debug("Cancelling TUI message handler")
243 tuiCancel()
244 app.tuiWG.Wait()
245 })
246 defer app.tuiWG.Done()
247 for {
248 select {
249 case <-tuiCtx.Done():
250 slog.Debug("TUI message handler shutting down")
251 return
252 case msg, ok := <-app.events:
253 if !ok {
254 slog.Debug("TUI message channel closed")
255 return
256 }
257 program.Send(msg)
258 }
259 }
260}
261
262// Shutdown performs a clean shutdown of the application
263func (app *App) Shutdown() {
264 app.cancelFuncsMutex.Lock()
265 for _, cancel := range app.watcherCancelFuncs {
266 cancel()
267 }
268 app.cancelFuncsMutex.Unlock()
269 app.lspWatcherWG.Wait()
270
271 app.clientsMutex.RLock()
272 clients := make(map[string]*lsp.Client, len(app.LSPClients))
273 maps.Copy(clients, app.LSPClients)
274 app.clientsMutex.RUnlock()
275
276 for name, client := range clients {
277 shutdownCtx, cancel := context.WithTimeout(app.globalCtx, 5*time.Second)
278 if err := client.Shutdown(shutdownCtx); err != nil {
279 slog.Error("Failed to shutdown LSP client", "name", name, "error", err)
280 }
281 cancel()
282 }
283 if app.CoderAgent != nil {
284 app.CoderAgent.CancelAll()
285 }
286
287 for _, cleanup := range app.cleanupFuncs {
288 if cleanup != nil {
289 cleanup()
290 }
291 }
292}