1package messages
2
3import (
4 "encoding/json"
5 "fmt"
6 "strings"
7 "time"
8
9 "github.com/charmbracelet/crush/internal/diff"
10 "github.com/charmbracelet/crush/internal/fileutil"
11 "github.com/charmbracelet/crush/internal/highlight"
12 "github.com/charmbracelet/crush/internal/llm/agent"
13 "github.com/charmbracelet/crush/internal/llm/tools"
14 "github.com/charmbracelet/crush/internal/tui/styles"
15 "github.com/charmbracelet/lipgloss/v2"
16 "github.com/charmbracelet/lipgloss/v2/tree"
17 "github.com/charmbracelet/x/ansi"
18)
19
20// responseContextHeight limits the number of lines displayed in tool output
21const responseContextHeight = 10
22
23// renderer defines the interface for tool-specific rendering implementations
24type renderer interface {
25 // Render returns the complete (already styled) tool‑call view, not
26 // including the outer border.
27 Render(v *toolCallCmp) string
28}
29
30// rendererFactory creates new renderer instances
31type rendererFactory func() renderer
32
33// renderRegistry manages the mapping of tool names to their renderers
34type renderRegistry map[string]rendererFactory
35
36// register adds a new renderer factory to the registry
37func (rr renderRegistry) register(name string, f rendererFactory) { rr[name] = f }
38
39// lookup retrieves a renderer for the given tool name, falling back to generic renderer
40func (rr renderRegistry) lookup(name string) renderer {
41 if f, ok := rr[name]; ok {
42 return f()
43 }
44 return genericRenderer{} // sensible fallback
45}
46
47// registry holds all registered tool renderers
48var registry = renderRegistry{}
49
50// baseRenderer provides common functionality for all tool renderers
51type baseRenderer struct{}
52
53// paramBuilder helps construct parameter lists for tool headers
54type paramBuilder struct {
55 args []string
56}
57
58// newParamBuilder creates a new parameter builder
59func newParamBuilder() *paramBuilder {
60 return ¶mBuilder{args: make([]string, 0)}
61}
62
63// addMain adds the main parameter (first argument)
64func (pb *paramBuilder) addMain(value string) *paramBuilder {
65 if value != "" {
66 pb.args = append(pb.args, value)
67 }
68 return pb
69}
70
71// addKeyValue adds a key-value pair parameter
72func (pb *paramBuilder) addKeyValue(key, value string) *paramBuilder {
73 if value != "" {
74 pb.args = append(pb.args, key, value)
75 }
76 return pb
77}
78
79// addFlag adds a boolean flag parameter
80func (pb *paramBuilder) addFlag(key string, value bool) *paramBuilder {
81 if value {
82 pb.args = append(pb.args, key, "true")
83 }
84 return pb
85}
86
87// build returns the final parameter list
88func (pb *paramBuilder) build() []string {
89 return pb.args
90}
91
92// renderWithParams provides a common rendering pattern for tools with parameters
93func (br baseRenderer) renderWithParams(v *toolCallCmp, toolName string, args []string, contentRenderer func() string) string {
94 width := v.textWidth()
95 if v.isNested {
96 width -= 4 // Adjust for nested tool call indentation
97 }
98 header := br.makeHeader(v, toolName, width, args...)
99 if v.isNested {
100 return v.style().Render(header)
101 }
102 if res, done := earlyState(header, v); done {
103 return res
104 }
105 body := contentRenderer()
106 return joinHeaderBody(header, body)
107}
108
109// unmarshalParams safely unmarshal JSON parameters
110func (br baseRenderer) unmarshalParams(input string, target any) error {
111 return json.Unmarshal([]byte(input), target)
112}
113
114// makeHeader builds "<Tool>: param (key=value)" and truncates as needed.
115func (br baseRenderer) makeHeader(v *toolCallCmp, tool string, width int, params ...string) string {
116 t := styles.CurrentTheme()
117 icon := t.S().Base.Foreground(t.GreenDark).Render(styles.ToolPending)
118 if v.result.ToolCallID != "" {
119 if v.result.IsError {
120 icon = t.S().Base.Foreground(t.RedDark).Render(styles.ToolError)
121 } else {
122 icon = t.S().Base.Foreground(t.Green).Render(styles.ToolSuccess)
123 }
124 } else if v.cancelled {
125 icon = t.S().Muted.Render(styles.ToolPending)
126 }
127 tool = t.S().Base.Foreground(t.Blue).Render(tool)
128 prefix := fmt.Sprintf("%s %s: ", icon, tool)
129 return prefix + renderParamList(width-lipgloss.Width(prefix), params...)
130}
131
132// renderError provides consistent error rendering
133func (br baseRenderer) renderError(v *toolCallCmp, message string) string {
134 t := styles.CurrentTheme()
135 header := br.makeHeader(v, prettifyToolName(v.call.Name), v.textWidth(), "")
136 message = t.S().Error.Render(v.fit(message, v.textWidth()-2)) // -2 for padding
137 return joinHeaderBody(header, message)
138}
139
140// Register tool renderers
141func init() {
142 registry.register(tools.BashToolName, func() renderer { return bashRenderer{} })
143 registry.register(tools.ViewToolName, func() renderer { return viewRenderer{} })
144 registry.register(tools.EditToolName, func() renderer { return editRenderer{} })
145 registry.register(tools.WriteToolName, func() renderer { return writeRenderer{} })
146 registry.register(tools.FetchToolName, func() renderer { return fetchRenderer{} })
147 registry.register(tools.GlobToolName, func() renderer { return globRenderer{} })
148 registry.register(tools.GrepToolName, func() renderer { return grepRenderer{} })
149 registry.register(tools.LSToolName, func() renderer { return lsRenderer{} })
150 registry.register(tools.SourcegraphToolName, func() renderer { return sourcegraphRenderer{} })
151 registry.register(tools.DiagnosticsToolName, func() renderer { return diagnosticsRenderer{} })
152 registry.register(agent.AgentToolName, func() renderer { return agentRenderer{} })
153}
154
155// -----------------------------------------------------------------------------
156// Generic renderer
157// -----------------------------------------------------------------------------
158
159// genericRenderer handles unknown tool types with basic parameter display
160type genericRenderer struct {
161 baseRenderer
162}
163
164// Render displays the tool call with its raw input and plain content output
165func (gr genericRenderer) Render(v *toolCallCmp) string {
166 return gr.renderWithParams(v, prettifyToolName(v.call.Name), []string{v.call.Input}, func() string {
167 return renderPlainContent(v, v.result.Content)
168 })
169}
170
171// -----------------------------------------------------------------------------
172// Bash renderer
173// -----------------------------------------------------------------------------
174
175// bashRenderer handles bash command execution display
176type bashRenderer struct {
177 baseRenderer
178}
179
180// Render displays the bash command with sanitized newlines and plain output
181func (br bashRenderer) Render(v *toolCallCmp) string {
182 var params tools.BashParams
183 if err := br.unmarshalParams(v.call.Input, ¶ms); err != nil {
184 return br.renderError(v, "Invalid bash parameters")
185 }
186
187 cmd := strings.ReplaceAll(params.Command, "\n", " ")
188 args := newParamBuilder().addMain(cmd).build()
189
190 return br.renderWithParams(v, "Bash", args, func() string {
191 return renderPlainContent(v, v.result.Content)
192 })
193}
194
195// -----------------------------------------------------------------------------
196// View renderer
197// -----------------------------------------------------------------------------
198
199// viewRenderer handles file viewing with syntax highlighting and line numbers
200type viewRenderer struct {
201 baseRenderer
202}
203
204// Render displays file content with optional limit and offset parameters
205func (vr viewRenderer) Render(v *toolCallCmp) string {
206 var params tools.ViewParams
207 if err := vr.unmarshalParams(v.call.Input, ¶ms); err != nil {
208 return vr.renderError(v, "Invalid view parameters")
209 }
210
211 file := fileutil.PrettyPath(params.FilePath)
212 args := newParamBuilder().
213 addMain(file).
214 addKeyValue("limit", formatNonZero(params.Limit)).
215 addKeyValue("offset", formatNonZero(params.Offset)).
216 build()
217
218 return vr.renderWithParams(v, "View", args, func() string {
219 var meta tools.ViewResponseMetadata
220 if err := vr.unmarshalParams(v.result.Metadata, &meta); err != nil {
221 return renderPlainContent(v, v.result.Content)
222 }
223 return renderCodeContent(v, meta.FilePath, meta.Content, params.Offset)
224 })
225}
226
227// formatNonZero returns string representation of non-zero integers, empty string for zero
228func formatNonZero(value int) string {
229 if value == 0 {
230 return ""
231 }
232 return fmt.Sprintf("%d", value)
233}
234
235// -----------------------------------------------------------------------------
236// Edit renderer
237// -----------------------------------------------------------------------------
238
239// editRenderer handles file editing with diff visualization
240type editRenderer struct {
241 baseRenderer
242}
243
244// Render displays the edited file with a formatted diff of changes
245func (er editRenderer) Render(v *toolCallCmp) string {
246 var params tools.EditParams
247 if err := er.unmarshalParams(v.call.Input, ¶ms); err != nil {
248 return er.renderError(v, "Invalid edit parameters")
249 }
250
251 file := fileutil.PrettyPath(params.FilePath)
252 args := newParamBuilder().addMain(file).build()
253
254 return er.renderWithParams(v, "Edit", args, func() string {
255 var meta tools.EditResponseMetadata
256 if err := er.unmarshalParams(v.result.Metadata, &meta); err != nil {
257 return renderPlainContent(v, v.result.Content)
258 }
259
260 trunc := truncateHeight(meta.Diff, responseContextHeight)
261 diffView, _ := diff.FormatDiff(trunc, diff.WithTotalWidth(v.textWidth()-2))
262 return diffView
263 })
264}
265
266// -----------------------------------------------------------------------------
267// Write renderer
268// -----------------------------------------------------------------------------
269
270// writeRenderer handles file writing with syntax-highlighted content preview
271type writeRenderer struct {
272 baseRenderer
273}
274
275// Render displays the file being written with syntax highlighting
276func (wr writeRenderer) Render(v *toolCallCmp) string {
277 var params tools.WriteParams
278 if err := wr.unmarshalParams(v.call.Input, ¶ms); err != nil {
279 return wr.renderError(v, "Invalid write parameters")
280 }
281
282 file := fileutil.PrettyPath(params.FilePath)
283 args := newParamBuilder().addMain(file).build()
284
285 return wr.renderWithParams(v, "Write", args, func() string {
286 return renderCodeContent(v, file, params.Content, 0)
287 })
288}
289
290// -----------------------------------------------------------------------------
291// Fetch renderer
292// -----------------------------------------------------------------------------
293
294// fetchRenderer handles URL fetching with format-specific content display
295type fetchRenderer struct {
296 baseRenderer
297}
298
299// Render displays the fetched URL with format and timeout parameters
300func (fr fetchRenderer) Render(v *toolCallCmp) string {
301 var params tools.FetchParams
302 if err := fr.unmarshalParams(v.call.Input, ¶ms); err != nil {
303 return fr.renderError(v, "Invalid fetch parameters")
304 }
305
306 args := newParamBuilder().
307 addMain(params.URL).
308 addKeyValue("format", params.Format).
309 addKeyValue("timeout", formatTimeout(params.Timeout)).
310 build()
311
312 return fr.renderWithParams(v, "Fetch", args, func() string {
313 file := fr.getFileExtension(params.Format)
314 return renderCodeContent(v, file, v.result.Content, 0)
315 })
316}
317
318// getFileExtension returns appropriate file extension for syntax highlighting
319func (fr fetchRenderer) getFileExtension(format string) string {
320 switch format {
321 case "text":
322 return "fetch.txt"
323 case "html":
324 return "fetch.html"
325 default:
326 return "fetch.md"
327 }
328}
329
330// formatTimeout converts timeout seconds to duration string
331func formatTimeout(timeout int) string {
332 if timeout == 0 {
333 return ""
334 }
335 return (time.Duration(timeout) * time.Second).String()
336}
337
338// -----------------------------------------------------------------------------
339// Glob renderer
340// -----------------------------------------------------------------------------
341
342// globRenderer handles file pattern matching with path filtering
343type globRenderer struct {
344 baseRenderer
345}
346
347// Render displays the glob pattern with optional path parameter
348func (gr globRenderer) Render(v *toolCallCmp) string {
349 var params tools.GlobParams
350 if err := gr.unmarshalParams(v.call.Input, ¶ms); err != nil {
351 return gr.renderError(v, "Invalid glob parameters")
352 }
353
354 args := newParamBuilder().
355 addMain(params.Pattern).
356 addKeyValue("path", params.Path).
357 build()
358
359 return gr.renderWithParams(v, "Glob", args, func() string {
360 return renderPlainContent(v, v.result.Content)
361 })
362}
363
364// -----------------------------------------------------------------------------
365// Grep renderer
366// -----------------------------------------------------------------------------
367
368// grepRenderer handles content searching with pattern matching options
369type grepRenderer struct {
370 baseRenderer
371}
372
373// Render displays the search pattern with path, include, and literal text options
374func (gr grepRenderer) Render(v *toolCallCmp) string {
375 var params tools.GrepParams
376 if err := gr.unmarshalParams(v.call.Input, ¶ms); err != nil {
377 return gr.renderError(v, "Invalid grep parameters")
378 }
379
380 args := newParamBuilder().
381 addMain(params.Pattern).
382 addKeyValue("path", params.Path).
383 addKeyValue("include", params.Include).
384 addFlag("literal", params.LiteralText).
385 build()
386
387 return gr.renderWithParams(v, "Grep", args, func() string {
388 return renderPlainContent(v, v.result.Content)
389 })
390}
391
392// -----------------------------------------------------------------------------
393// LS renderer
394// -----------------------------------------------------------------------------
395
396// lsRenderer handles directory listing with default path handling
397type lsRenderer struct {
398 baseRenderer
399}
400
401// Render displays the directory path, defaulting to current directory
402func (lr lsRenderer) Render(v *toolCallCmp) string {
403 var params tools.LSParams
404 if err := lr.unmarshalParams(v.call.Input, ¶ms); err != nil {
405 return lr.renderError(v, "Invalid ls parameters")
406 }
407
408 path := params.Path
409 if path == "" {
410 path = "."
411 }
412 path = fileutil.PrettyPath(path)
413
414 args := newParamBuilder().addMain(path).build()
415
416 return lr.renderWithParams(v, "List", args, func() string {
417 return renderPlainContent(v, v.result.Content)
418 })
419}
420
421// -----------------------------------------------------------------------------
422// Sourcegraph renderer
423// -----------------------------------------------------------------------------
424
425// sourcegraphRenderer handles code search with count and context options
426type sourcegraphRenderer struct {
427 baseRenderer
428}
429
430// Render displays the search query with optional count and context window parameters
431func (sr sourcegraphRenderer) Render(v *toolCallCmp) string {
432 var params tools.SourcegraphParams
433 if err := sr.unmarshalParams(v.call.Input, ¶ms); err != nil {
434 return sr.renderError(v, "Invalid sourcegraph parameters")
435 }
436
437 args := newParamBuilder().
438 addMain(params.Query).
439 addKeyValue("count", formatNonZero(params.Count)).
440 addKeyValue("context", formatNonZero(params.ContextWindow)).
441 build()
442
443 return sr.renderWithParams(v, "Sourcegraph", args, func() string {
444 return renderPlainContent(v, v.result.Content)
445 })
446}
447
448// -----------------------------------------------------------------------------
449// Diagnostics renderer
450// -----------------------------------------------------------------------------
451
452// diagnosticsRenderer handles project-wide diagnostic information
453type diagnosticsRenderer struct {
454 baseRenderer
455}
456
457// Render displays project diagnostics with plain content formatting
458func (dr diagnosticsRenderer) Render(v *toolCallCmp) string {
459 args := newParamBuilder().addMain("project").build()
460
461 return dr.renderWithParams(v, "Diagnostics", args, func() string {
462 return renderPlainContent(v, v.result.Content)
463 })
464}
465
466// -----------------------------------------------------------------------------
467// Task renderer
468// -----------------------------------------------------------------------------
469
470// agentRenderer handles project-wide diagnostic information
471type agentRenderer struct {
472 baseRenderer
473}
474
475// Render displays agent task parameters and result content
476func (tr agentRenderer) Render(v *toolCallCmp) string {
477 var params agent.AgentParams
478 if err := tr.unmarshalParams(v.call.Input, ¶ms); err != nil {
479 return tr.renderError(v, "Invalid task parameters")
480 }
481 prompt := params.Prompt
482 prompt = strings.ReplaceAll(prompt, "\n", " ")
483 args := newParamBuilder().addMain(prompt).build()
484
485 header := tr.makeHeader(v, "Task", v.textWidth(), args...)
486 t := tree.Root(header)
487
488 for _, call := range v.nestedToolCalls {
489 t.Child(call.View())
490 }
491
492 parts := []string{
493 t.Enumerator(tree.RoundedEnumerator).String(),
494 }
495 if v.result.ToolCallID == "" {
496 v.spinning = true
497 parts = append(parts, v.anim.View().String())
498 } else {
499 v.spinning = false
500 }
501
502 header = lipgloss.JoinVertical(
503 lipgloss.Left,
504 parts...,
505 )
506
507 if v.result.ToolCallID == "" {
508 return header
509 }
510
511 body := renderPlainContent(v, v.result.Content)
512 return joinHeaderBody(header, body)
513}
514
515// renderParamList renders params, params[0] (params[1]=params[2] ....)
516func renderParamList(paramsWidth int, params ...string) string {
517 if len(params) == 0 {
518 return ""
519 }
520 mainParam := params[0]
521 if len(mainParam) > paramsWidth {
522 mainParam = mainParam[:paramsWidth-3] + "..."
523 }
524
525 if len(params) == 1 {
526 return mainParam
527 }
528 otherParams := params[1:]
529 // create pairs of key/value
530 // if odd number of params, the last one is a key without value
531 if len(otherParams)%2 != 0 {
532 otherParams = append(otherParams, "")
533 }
534 parts := make([]string, 0, len(otherParams)/2)
535 for i := 0; i < len(otherParams); i += 2 {
536 key := otherParams[i]
537 value := otherParams[i+1]
538 if value == "" {
539 continue
540 }
541 parts = append(parts, fmt.Sprintf("%s=%s", key, value))
542 }
543
544 partsRendered := strings.Join(parts, ", ")
545 remainingWidth := paramsWidth - lipgloss.Width(partsRendered) - 3 // count for " ()"
546 if remainingWidth < 30 {
547 // No space for the params, just show the main
548 return mainParam
549 }
550
551 if len(parts) > 0 {
552 mainParam = fmt.Sprintf("%s (%s)", mainParam, strings.Join(parts, ", "))
553 }
554
555 return ansi.Truncate(mainParam, paramsWidth, "...")
556}
557
558// earlyState returns immediately‑rendered error/cancelled/ongoing states.
559func earlyState(header string, v *toolCallCmp) (string, bool) {
560 t := styles.CurrentTheme()
561 message := ""
562 switch {
563 case v.result.IsError:
564 message = v.renderToolError()
565 case v.cancelled:
566 message = "Cancelled"
567 case v.result.ToolCallID == "":
568 message = "Waiting for tool to start..."
569 default:
570 return "", false
571 }
572
573 message = t.S().Base.PaddingLeft(2).Render(message)
574 return lipgloss.JoinVertical(lipgloss.Left, header, message), true
575}
576
577func joinHeaderBody(header, body string) string {
578 t := styles.CurrentTheme()
579 body = t.S().Base.PaddingLeft(2).Render(body)
580 return lipgloss.JoinVertical(lipgloss.Left, header, body, "")
581}
582
583func renderPlainContent(v *toolCallCmp, content string) string {
584 t := styles.CurrentTheme()
585 content = strings.TrimSpace(content)
586 lines := strings.Split(content, "\n")
587
588 width := v.textWidth() - 2 // -2 for left padding
589 var out []string
590 for i, ln := range lines {
591 if i >= responseContextHeight {
592 break
593 }
594 ln = " " + ln // left padding
595 if len(ln) > width {
596 ln = v.fit(ln, width)
597 }
598 out = append(out, t.S().Muted.
599 Width(width).
600 Background(t.BgSubtle).
601 Render(ln))
602 }
603
604 if len(lines) > responseContextHeight {
605 out = append(out, t.S().Muted.
606 Background(t.BgSubtle).
607 Width(width).
608 Render(fmt.Sprintf("... (%d lines)", len(lines)-responseContextHeight)))
609 }
610 return strings.Join(out, "\n")
611}
612
613func renderCodeContent(v *toolCallCmp, path, content string, offset int) string {
614 t := styles.CurrentTheme()
615 truncated := truncateHeight(content, responseContextHeight)
616
617 highlighted, _ := highlight.SyntaxHighlight(truncated, path, t.BgSubtle)
618 lines := strings.Split(highlighted, "\n")
619
620 if len(strings.Split(content, "\n")) > responseContextHeight {
621 lines = append(lines, t.S().Muted.
622 Background(t.BgSubtle).
623 Width(v.textWidth()-2).
624 Render(fmt.Sprintf("... (%d lines)", len(strings.Split(content, "\n"))-responseContextHeight)))
625 }
626
627 for i, ln := range lines {
628 num := t.S().Muted.
629 Background(t.BgSubtle).
630 PaddingLeft(4).
631 PaddingRight(2).
632 Render(fmt.Sprintf("%d", i+1+offset))
633 w := v.textWidth() - 2 - lipgloss.Width(num) // -2 for left padding
634 lines[i] = lipgloss.JoinHorizontal(lipgloss.Left,
635 num,
636 t.S().Base.
637 Width(w).
638 Background(t.BgSubtle).
639 Render(v.fit(ln, w)))
640 }
641 return lipgloss.JoinVertical(lipgloss.Left, lines...)
642}
643
644func (v *toolCallCmp) renderToolError() string {
645 t := styles.CurrentTheme()
646 err := strings.ReplaceAll(v.result.Content, "\n", " ")
647 err = fmt.Sprintf("Error: %s", err)
648 return t.S().Base.Foreground(t.Error).Render(v.fit(err, v.textWidth()))
649}
650
651func truncateHeight(s string, h int) string {
652 lines := strings.Split(s, "\n")
653 if len(lines) > h {
654 return strings.Join(lines[:h], "\n")
655 }
656 return s
657}
658
659func prettifyToolName(name string) string {
660 switch name {
661 case agent.AgentToolName:
662 return "Task"
663 case tools.BashToolName:
664 return "Bash"
665 case tools.EditToolName:
666 return "Edit"
667 case tools.FetchToolName:
668 return "Fetch"
669 case tools.GlobToolName:
670 return "Glob"
671 case tools.GrepToolName:
672 return "Grep"
673 case tools.LSToolName:
674 return "List"
675 case tools.SourcegraphToolName:
676 return "Sourcegraph"
677 case tools.ViewToolName:
678 return "View"
679 case tools.WriteToolName:
680 return "Write"
681 default:
682 return name
683 }
684}