1package messages
2
3import (
4 "encoding/json"
5 "fmt"
6 "strings"
7 "time"
8
9 "github.com/charmbracelet/crush/internal/fsext"
10 "github.com/charmbracelet/crush/internal/highlight"
11 "github.com/charmbracelet/crush/internal/llm/agent"
12 "github.com/charmbracelet/crush/internal/llm/tools"
13 "github.com/charmbracelet/crush/internal/tui/components/core"
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 := fsext.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 := fsext.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 formatter := core.DiffFormatter().
261 Before(fsext.PrettyPath(params.FilePath), meta.OldContent).
262 After(fsext.PrettyPath(params.FilePath), meta.NewContent).
263 Split().
264 Width(v.textWidth() - 2) // -2 for padding
265 return formatter.String()
266 })
267}
268
269// -----------------------------------------------------------------------------
270// Write renderer
271// -----------------------------------------------------------------------------
272
273// writeRenderer handles file writing with syntax-highlighted content preview
274type writeRenderer struct {
275 baseRenderer
276}
277
278// Render displays the file being written with syntax highlighting
279func (wr writeRenderer) Render(v *toolCallCmp) string {
280 var params tools.WriteParams
281 if err := wr.unmarshalParams(v.call.Input, ¶ms); err != nil {
282 return wr.renderError(v, "Invalid write parameters")
283 }
284
285 file := fsext.PrettyPath(params.FilePath)
286 args := newParamBuilder().addMain(file).build()
287
288 return wr.renderWithParams(v, "Write", args, func() string {
289 return renderCodeContent(v, file, params.Content, 0)
290 })
291}
292
293// -----------------------------------------------------------------------------
294// Fetch renderer
295// -----------------------------------------------------------------------------
296
297// fetchRenderer handles URL fetching with format-specific content display
298type fetchRenderer struct {
299 baseRenderer
300}
301
302// Render displays the fetched URL with format and timeout parameters
303func (fr fetchRenderer) Render(v *toolCallCmp) string {
304 var params tools.FetchParams
305 if err := fr.unmarshalParams(v.call.Input, ¶ms); err != nil {
306 return fr.renderError(v, "Invalid fetch parameters")
307 }
308
309 args := newParamBuilder().
310 addMain(params.URL).
311 addKeyValue("format", params.Format).
312 addKeyValue("timeout", formatTimeout(params.Timeout)).
313 build()
314
315 return fr.renderWithParams(v, "Fetch", args, func() string {
316 file := fr.getFileExtension(params.Format)
317 return renderCodeContent(v, file, v.result.Content, 0)
318 })
319}
320
321// getFileExtension returns appropriate file extension for syntax highlighting
322func (fr fetchRenderer) getFileExtension(format string) string {
323 switch format {
324 case "text":
325 return "fetch.txt"
326 case "html":
327 return "fetch.html"
328 default:
329 return "fetch.md"
330 }
331}
332
333// formatTimeout converts timeout seconds to duration string
334func formatTimeout(timeout int) string {
335 if timeout == 0 {
336 return ""
337 }
338 return (time.Duration(timeout) * time.Second).String()
339}
340
341// -----------------------------------------------------------------------------
342// Glob renderer
343// -----------------------------------------------------------------------------
344
345// globRenderer handles file pattern matching with path filtering
346type globRenderer struct {
347 baseRenderer
348}
349
350// Render displays the glob pattern with optional path parameter
351func (gr globRenderer) Render(v *toolCallCmp) string {
352 var params tools.GlobParams
353 if err := gr.unmarshalParams(v.call.Input, ¶ms); err != nil {
354 return gr.renderError(v, "Invalid glob parameters")
355 }
356
357 args := newParamBuilder().
358 addMain(params.Pattern).
359 addKeyValue("path", params.Path).
360 build()
361
362 return gr.renderWithParams(v, "Glob", args, func() string {
363 return renderPlainContent(v, v.result.Content)
364 })
365}
366
367// -----------------------------------------------------------------------------
368// Grep renderer
369// -----------------------------------------------------------------------------
370
371// grepRenderer handles content searching with pattern matching options
372type grepRenderer struct {
373 baseRenderer
374}
375
376// Render displays the search pattern with path, include, and literal text options
377func (gr grepRenderer) Render(v *toolCallCmp) string {
378 var params tools.GrepParams
379 if err := gr.unmarshalParams(v.call.Input, ¶ms); err != nil {
380 return gr.renderError(v, "Invalid grep parameters")
381 }
382
383 args := newParamBuilder().
384 addMain(params.Pattern).
385 addKeyValue("path", params.Path).
386 addKeyValue("include", params.Include).
387 addFlag("literal", params.LiteralText).
388 build()
389
390 return gr.renderWithParams(v, "Grep", args, func() string {
391 return renderPlainContent(v, v.result.Content)
392 })
393}
394
395// -----------------------------------------------------------------------------
396// LS renderer
397// -----------------------------------------------------------------------------
398
399// lsRenderer handles directory listing with default path handling
400type lsRenderer struct {
401 baseRenderer
402}
403
404// Render displays the directory path, defaulting to current directory
405func (lr lsRenderer) Render(v *toolCallCmp) string {
406 var params tools.LSParams
407 if err := lr.unmarshalParams(v.call.Input, ¶ms); err != nil {
408 return lr.renderError(v, "Invalid ls parameters")
409 }
410
411 path := params.Path
412 if path == "" {
413 path = "."
414 }
415 path = fsext.PrettyPath(path)
416
417 args := newParamBuilder().addMain(path).build()
418
419 return lr.renderWithParams(v, "List", args, func() string {
420 return renderPlainContent(v, v.result.Content)
421 })
422}
423
424// -----------------------------------------------------------------------------
425// Sourcegraph renderer
426// -----------------------------------------------------------------------------
427
428// sourcegraphRenderer handles code search with count and context options
429type sourcegraphRenderer struct {
430 baseRenderer
431}
432
433// Render displays the search query with optional count and context window parameters
434func (sr sourcegraphRenderer) Render(v *toolCallCmp) string {
435 var params tools.SourcegraphParams
436 if err := sr.unmarshalParams(v.call.Input, ¶ms); err != nil {
437 return sr.renderError(v, "Invalid sourcegraph parameters")
438 }
439
440 args := newParamBuilder().
441 addMain(params.Query).
442 addKeyValue("count", formatNonZero(params.Count)).
443 addKeyValue("context", formatNonZero(params.ContextWindow)).
444 build()
445
446 return sr.renderWithParams(v, "Sourcegraph", args, func() string {
447 return renderPlainContent(v, v.result.Content)
448 })
449}
450
451// -----------------------------------------------------------------------------
452// Diagnostics renderer
453// -----------------------------------------------------------------------------
454
455// diagnosticsRenderer handles project-wide diagnostic information
456type diagnosticsRenderer struct {
457 baseRenderer
458}
459
460// Render displays project diagnostics with plain content formatting
461func (dr diagnosticsRenderer) Render(v *toolCallCmp) string {
462 args := newParamBuilder().addMain("project").build()
463
464 return dr.renderWithParams(v, "Diagnostics", args, func() string {
465 return renderPlainContent(v, v.result.Content)
466 })
467}
468
469// -----------------------------------------------------------------------------
470// Task renderer
471// -----------------------------------------------------------------------------
472
473// agentRenderer handles project-wide diagnostic information
474type agentRenderer struct {
475 baseRenderer
476}
477
478// Render displays agent task parameters and result content
479func (tr agentRenderer) Render(v *toolCallCmp) string {
480 var params agent.AgentParams
481 if err := tr.unmarshalParams(v.call.Input, ¶ms); err != nil {
482 return tr.renderError(v, "Invalid task parameters")
483 }
484 prompt := params.Prompt
485 prompt = strings.ReplaceAll(prompt, "\n", " ")
486 args := newParamBuilder().addMain(prompt).build()
487
488 header := tr.makeHeader(v, "Task", v.textWidth(), args...)
489 t := tree.Root(header)
490
491 for _, call := range v.nestedToolCalls {
492 t.Child(call.View())
493 }
494
495 parts := []string{
496 t.Enumerator(tree.RoundedEnumerator).String(),
497 }
498 if v.result.ToolCallID == "" {
499 v.spinning = true
500 parts = append(parts, v.anim.View().String())
501 } else {
502 v.spinning = false
503 }
504
505 header = lipgloss.JoinVertical(
506 lipgloss.Left,
507 parts...,
508 )
509
510 if v.result.ToolCallID == "" {
511 return header
512 }
513
514 body := renderPlainContent(v, v.result.Content)
515 return joinHeaderBody(header, body)
516}
517
518// renderParamList renders params, params[0] (params[1]=params[2] ....)
519func renderParamList(paramsWidth int, params ...string) string {
520 t := styles.CurrentTheme()
521 if len(params) == 0 {
522 return ""
523 }
524 mainParam := params[0]
525 if len(mainParam) > paramsWidth {
526 mainParam = mainParam[:paramsWidth-3] + "..."
527 }
528
529 if len(params) == 1 {
530 return t.S().Subtle.Render(mainParam)
531 }
532 otherParams := params[1:]
533 // create pairs of key/value
534 // if odd number of params, the last one is a key without value
535 if len(otherParams)%2 != 0 {
536 otherParams = append(otherParams, "")
537 }
538 parts := make([]string, 0, len(otherParams)/2)
539 for i := 0; i < len(otherParams); i += 2 {
540 key := otherParams[i]
541 value := otherParams[i+1]
542 if value == "" {
543 continue
544 }
545 parts = append(parts, fmt.Sprintf("%s=%s", key, value))
546 }
547
548 partsRendered := strings.Join(parts, ", ")
549 remainingWidth := paramsWidth - lipgloss.Width(partsRendered) - 3 // count for " ()"
550 if remainingWidth < 30 {
551 // No space for the params, just show the main
552 return t.S().Subtle.Render(mainParam)
553 }
554
555 if len(parts) > 0 {
556 mainParam = fmt.Sprintf("%s (%s)", mainParam, strings.Join(parts, ", "))
557 }
558
559 return t.S().Subtle.Render(ansi.Truncate(mainParam, paramsWidth, "..."))
560}
561
562// earlyState returns immediately‑rendered error/cancelled/ongoing states.
563func earlyState(header string, v *toolCallCmp) (string, bool) {
564 t := styles.CurrentTheme()
565 message := ""
566 switch {
567 case v.result.IsError:
568 message = v.renderToolError()
569 case v.cancelled:
570 message = "Cancelled"
571 case v.result.ToolCallID == "":
572 message = "Waiting for tool to start..."
573 default:
574 return "", false
575 }
576
577 message = t.S().Base.PaddingLeft(2).Render(message)
578 return lipgloss.JoinVertical(lipgloss.Left, header, message), true
579}
580
581func joinHeaderBody(header, body string) string {
582 t := styles.CurrentTheme()
583 body = t.S().Base.PaddingLeft(2).Render(body)
584 return lipgloss.JoinVertical(lipgloss.Left, header, "", body, "")
585}
586
587func renderPlainContent(v *toolCallCmp, content string) string {
588 t := styles.CurrentTheme()
589 content = strings.TrimSpace(content)
590 lines := strings.Split(content, "\n")
591
592 width := v.textWidth() - 2 // -2 for left padding
593 var out []string
594 for i, ln := range lines {
595 if i >= responseContextHeight {
596 break
597 }
598 ln = " " + ln // left padding
599 if len(ln) > width {
600 ln = v.fit(ln, width)
601 }
602 out = append(out, t.S().Muted.
603 Width(width).
604 Background(t.BgBaseLighter).
605 Render(ln))
606 }
607
608 if len(lines) > responseContextHeight {
609 out = append(out, t.S().Muted.
610 Background(t.BgBaseLighter).
611 Width(width).
612 Render(fmt.Sprintf("... (%d lines)", len(lines)-responseContextHeight)))
613 }
614 return strings.Join(out, "\n")
615}
616
617func pad(v any, width int) string {
618 s := fmt.Sprintf("%v", v)
619 w := ansi.StringWidth(s)
620 if w >= width {
621 return s
622 }
623 return strings.Repeat(" ", width-w) + s
624}
625
626func renderCodeContent(v *toolCallCmp, path, content string, offset int) string {
627 t := styles.CurrentTheme()
628 truncated := truncateHeight(content, responseContextHeight)
629
630 highlighted, _ := highlight.SyntaxHighlight(truncated, path, t.BgBase)
631 lines := strings.Split(highlighted, "\n")
632
633 if len(strings.Split(content, "\n")) > responseContextHeight {
634 lines = append(lines, t.S().Muted.
635 Background(t.BgBase).
636 Render(fmt.Sprintf(" ... (%d lines)", len(strings.Split(content, "\n"))-responseContextHeight)))
637 }
638
639 maxLineNumber := len(lines) + offset
640 padding := lipgloss.Width(fmt.Sprintf("%d", maxLineNumber))
641 for i, ln := range lines {
642 num := t.S().Base.
643 Foreground(t.FgMuted).
644 Background(t.BgBase).
645 PaddingRight(1).
646 PaddingLeft(1).
647 Render(pad(i+1+offset, padding))
648 w := v.textWidth() - 2 - lipgloss.Width(num) // -2 for left padding
649 lines[i] = lipgloss.JoinHorizontal(lipgloss.Left,
650 num,
651 t.S().Base.
652 PaddingLeft(1).
653 Width(w).
654 Render(v.fit(ln, w)))
655 }
656 return lipgloss.JoinVertical(lipgloss.Left, lines...)
657}
658
659func (v *toolCallCmp) renderToolError() string {
660 t := styles.CurrentTheme()
661 err := strings.ReplaceAll(v.result.Content, "\n", " ")
662 err = fmt.Sprintf("Error: %s", err)
663 return t.S().Base.Foreground(t.Error).Render(v.fit(err, v.textWidth()))
664}
665
666func truncateHeight(s string, h int) string {
667 lines := strings.Split(s, "\n")
668 if len(lines) > h {
669 return strings.Join(lines[:h], "\n")
670 }
671 return s
672}
673
674func prettifyToolName(name string) string {
675 switch name {
676 case agent.AgentToolName:
677 return "Task"
678 case tools.BashToolName:
679 return "Bash"
680 case tools.EditToolName:
681 return "Edit"
682 case tools.FetchToolName:
683 return "Fetch"
684 case tools.GlobToolName:
685 return "Glob"
686 case tools.GrepToolName:
687 return "Grep"
688 case tools.LSToolName:
689 return "List"
690 case tools.SourcegraphToolName:
691 return "Sourcegraph"
692 case tools.ViewToolName:
693 return "View"
694 case tools.WriteToolName:
695 return "Write"
696 default:
697 return name
698 }
699}