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infiniloom_engine/parser/
extraction.rs

1//! Symbol extraction utilities for parsing
2//!
3//! This module contains standalone functions for extracting metadata from AST nodes:
4//! - Signatures
5//! - Docstrings
6//! - Visibility modifiers
7//! - Function calls
8//! - Inheritance relationships
9
10use super::language::Language;
11use crate::types::{SymbolKind, Visibility};
12use std::collections::HashSet;
13use tree_sitter::Node;
14
15/// Find a safe character boundary at or before the given byte index.
16/// This prevents panics when slicing strings with multi-byte UTF-8 characters.
17fn safe_char_boundary(s: &str, mut index: usize) -> usize {
18    if index >= s.len() {
19        return s.len();
20    }
21    // Walk backwards to find a valid char boundary
22    while index > 0 && !s.is_char_boundary(index) {
23        index -= 1;
24    }
25    index
26}
27
28/// Extract function/method signature
29pub fn extract_signature(node: Node<'_>, source_code: &str, language: Language) -> Option<String> {
30    let sig_node = match language {
31        Language::Python => {
32            if node.kind() == "function_definition" {
33                let start = node.start_byte();
34                let mut end = start;
35                for byte in &source_code.as_bytes()[start..] {
36                    end += 1;
37                    if *byte == b':' || *byte == b'\n' {
38                        break;
39                    }
40                }
41                // SAFETY: Ensure we slice at valid UTF-8 char boundaries
42                let safe_start = safe_char_boundary(source_code, start);
43                let safe_end = safe_char_boundary(source_code, end);
44                return Some(
45                    source_code[safe_start..safe_end]
46                        .trim()
47                        .to_owned()
48                        .replace('\n', " "),
49                );
50            }
51            None
52        },
53        Language::JavaScript | Language::TypeScript => {
54            if node.kind().contains("function") || node.kind().contains("method") {
55                let start = node.start_byte();
56                let mut end = start;
57                let mut brace_count = 0;
58                for byte in &source_code.as_bytes()[start..] {
59                    if *byte == b'{' {
60                        brace_count += 1;
61                        if brace_count == 1 {
62                            break;
63                        }
64                    }
65                    end += 1;
66                }
67                // SAFETY: Ensure we slice at valid UTF-8 char boundaries
68                let safe_start = safe_char_boundary(source_code, start);
69                let safe_end = safe_char_boundary(source_code, end);
70                return Some(
71                    source_code[safe_start..safe_end]
72                        .trim()
73                        .to_owned()
74                        .replace('\n', " "),
75                );
76            }
77            None
78        },
79        Language::Rust => {
80            if node.kind() == "function_item" {
81                for child in node.children(&mut node.walk()) {
82                    if child.kind() == "block" {
83                        let start = node.start_byte();
84                        let end = child.start_byte();
85                        return Some(source_code[start..end].trim().to_owned().replace('\n', " "));
86                    }
87                }
88            }
89            None
90        },
91        Language::Go => {
92            if node.kind() == "function_declaration" || node.kind() == "method_declaration" {
93                for child in node.children(&mut node.walk()) {
94                    if child.kind() == "block" {
95                        let start = node.start_byte();
96                        let end = child.start_byte();
97                        return Some(source_code[start..end].trim().to_owned().replace('\n', " "));
98                    }
99                }
100            }
101            None
102        },
103        Language::Java => {
104            if node.kind() == "method_declaration" {
105                for child in node.children(&mut node.walk()) {
106                    if child.kind() == "block" {
107                        let start = node.start_byte();
108                        let end = child.start_byte();
109                        return Some(source_code[start..end].trim().to_owned().replace('\n', " "));
110                    }
111                }
112            }
113            None
114        },
115        Language::C
116        | Language::Cpp
117        | Language::CSharp
118        | Language::Php
119        | Language::Kotlin
120        | Language::Swift
121        | Language::Scala => {
122            for child in node.children(&mut node.walk()) {
123                if child.kind() == "block"
124                    || child.kind() == "compound_statement"
125                    || child.kind() == "function_body"
126                {
127                    let start = node.start_byte();
128                    let end = child.start_byte();
129                    return Some(source_code[start..end].trim().to_owned().replace('\n', " "));
130                }
131            }
132            None
133        },
134        Language::Ruby | Language::Lua => {
135            let start = node.start_byte();
136            let mut end = start;
137            for byte in &source_code.as_bytes()[start..] {
138                end += 1;
139                if *byte == b'\n' {
140                    break;
141                }
142            }
143            Some(source_code[start..end].trim().to_owned())
144        },
145        Language::Bash => {
146            let start = node.start_byte();
147            let mut end = start;
148            for byte in &source_code.as_bytes()[start..] {
149                if *byte == b'{' {
150                    break;
151                }
152                end += 1;
153            }
154            Some(source_code[start..end].trim().to_owned())
155        },
156        Language::Haskell
157        | Language::OCaml
158        | Language::FSharp
159        | Language::Elixir
160        | Language::Clojure
161        | Language::R => {
162            let start = node.start_byte();
163            let mut end = start;
164            for byte in &source_code.as_bytes()[start..] {
165                end += 1;
166                if *byte == b'\n' || *byte == b'=' {
167                    break;
168                }
169            }
170            Some(source_code[start..end].trim().to_owned())
171        },
172    };
173
174    sig_node.or_else(|| {
175        let start = node.start_byte();
176        let end = std::cmp::min(start + 200, source_code.len());
177        // Ensure we slice at valid UTF-8 character boundaries
178        let safe_start = safe_char_boundary(source_code, start);
179        let safe_end = safe_char_boundary(source_code, end);
180        if safe_start >= safe_end {
181            return None;
182        }
183        let text = &source_code[safe_start..safe_end];
184        text.lines().next().map(|s| s.trim().to_owned())
185    })
186}
187
188/// Extract docstring/documentation comment
189pub fn extract_docstring(node: Node<'_>, source_code: &str, language: Language) -> Option<String> {
190    match language {
191        Language::Python => {
192            let mut cursor = node.walk();
193            for child in node.children(&mut cursor) {
194                if child.kind() == "block" {
195                    for stmt in child.children(&mut child.walk()) {
196                        if stmt.kind() == "expression_statement" {
197                            for expr in stmt.children(&mut stmt.walk()) {
198                                if expr.kind() == "string" {
199                                    if let Ok(text) = expr.utf8_text(source_code.as_bytes()) {
200                                        return Some(
201                                            text.trim_matches(|c| c == '"' || c == '\'')
202                                                .trim()
203                                                .to_owned(),
204                                        );
205                                    }
206                                }
207                            }
208                        }
209                    }
210                }
211            }
212            None
213        },
214        Language::JavaScript | Language::TypeScript => {
215            if let Some(prev_sibling) = node.prev_sibling() {
216                if prev_sibling.kind() == "comment" {
217                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
218                        if text.starts_with("/**") {
219                            return Some(clean_jsdoc(text));
220                        }
221                    }
222                }
223            }
224            None
225        },
226        Language::Rust => {
227            let start_byte = node.start_byte();
228            // SAFETY: Use floor_char_boundary to avoid panics on multi-byte UTF-8 characters
229            let safe_boundary = source_code.floor_char_boundary(start_byte);
230            let lines_before: Vec<_> = source_code[..safe_boundary]
231                .lines()
232                .rev()
233                .take_while(|line| line.trim().starts_with("///") || line.trim().is_empty())
234                .collect();
235
236            if !lines_before.is_empty() {
237                let doc: Vec<String> = lines_before
238                    .into_iter()
239                    .rev()
240                    .filter_map(|line| {
241                        let trimmed = line.trim();
242                        trimmed.strip_prefix("///").map(|s| s.trim().to_owned())
243                    })
244                    .collect();
245
246                if !doc.is_empty() {
247                    return Some(doc.join(" "));
248                }
249            }
250            None
251        },
252        Language::Go => {
253            if let Some(prev_sibling) = node.prev_sibling() {
254                if prev_sibling.kind() == "comment" {
255                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
256                        return Some(text.trim_start_matches("//").trim().to_owned());
257                    }
258                }
259            }
260            None
261        },
262        Language::Java => {
263            if let Some(prev_sibling) = node.prev_sibling() {
264                if prev_sibling.kind() == "block_comment" {
265                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
266                        if text.starts_with("/**") {
267                            return Some(clean_javadoc(text));
268                        }
269                    }
270                }
271            }
272            None
273        },
274        Language::C | Language::Cpp => {
275            if let Some(prev_sibling) = node.prev_sibling() {
276                if prev_sibling.kind() == "comment" {
277                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
278                        if text.starts_with("/**") || text.starts_with("/*") {
279                            return Some(clean_jsdoc(text));
280                        }
281                        return Some(text.trim_start_matches("//").trim().to_owned());
282                    }
283                }
284            }
285            None
286        },
287        Language::CSharp => {
288            let start_byte = node.start_byte();
289            // SAFETY: Use floor_char_boundary to avoid panics on multi-byte UTF-8 characters
290            let safe_boundary = source_code.floor_char_boundary(start_byte);
291            let lines_before: Vec<_> = source_code[..safe_boundary]
292                .lines()
293                .rev()
294                .take_while(|line| line.trim().starts_with("///") || line.trim().is_empty())
295                .collect();
296
297            if !lines_before.is_empty() {
298                let doc: Vec<String> = lines_before
299                    .into_iter()
300                    .rev()
301                    .filter_map(|line| {
302                        let trimmed = line.trim();
303                        trimmed.strip_prefix("///").map(|s| s.trim().to_owned())
304                    })
305                    .collect();
306
307                if !doc.is_empty() {
308                    return Some(doc.join(" "));
309                }
310            }
311            None
312        },
313        Language::Ruby => {
314            if let Some(prev_sibling) = node.prev_sibling() {
315                if prev_sibling.kind() == "comment" {
316                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
317                        return Some(text.trim_start_matches('#').trim().to_owned());
318                    }
319                }
320            }
321            None
322        },
323        Language::Php | Language::Kotlin | Language::Swift | Language::Scala => {
324            if let Some(prev_sibling) = node.prev_sibling() {
325                let kind = prev_sibling.kind();
326                if kind == "comment" || kind == "multiline_comment" || kind == "block_comment" {
327                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
328                        if text.starts_with("/**") {
329                            return Some(clean_jsdoc(text));
330                        }
331                    }
332                }
333            }
334            None
335        },
336        Language::Bash => {
337            if let Some(prev_sibling) = node.prev_sibling() {
338                if prev_sibling.kind() == "comment" {
339                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
340                        return Some(text.trim_start_matches('#').trim().to_owned());
341                    }
342                }
343            }
344            None
345        },
346        Language::Haskell => {
347            if let Some(prev_sibling) = node.prev_sibling() {
348                if prev_sibling.kind() == "comment" {
349                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
350                        let cleaned = text
351                            .trim_start_matches("{-")
352                            .trim_end_matches("-}")
353                            .trim_start_matches("--")
354                            .trim();
355                        return Some(cleaned.to_owned());
356                    }
357                }
358            }
359            None
360        },
361        Language::Elixir => {
362            if let Some(prev_sibling) = node.prev_sibling() {
363                if prev_sibling.kind() == "comment" {
364                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
365                        return Some(text.trim_start_matches('#').trim().to_owned());
366                    }
367                }
368            }
369            None
370        },
371        Language::Clojure => None,
372        Language::OCaml | Language::FSharp => {
373            if let Some(prev_sibling) = node.prev_sibling() {
374                if prev_sibling.kind() == "comment" {
375                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
376                        let cleaned = text
377                            .trim_start_matches("(**")
378                            .trim_start_matches("(*")
379                            .trim_end_matches("*)")
380                            .trim();
381                        return Some(cleaned.to_owned());
382                    }
383                }
384            }
385            None
386        },
387        Language::Lua => {
388            if let Some(prev_sibling) = node.prev_sibling() {
389                if prev_sibling.kind() == "comment" {
390                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
391                        let cleaned = text
392                            .trim_start_matches("--[[")
393                            .trim_end_matches("]]")
394                            .trim_start_matches("--")
395                            .trim();
396                        return Some(cleaned.to_owned());
397                    }
398                }
399            }
400            None
401        },
402        Language::R => {
403            if let Some(prev_sibling) = node.prev_sibling() {
404                if prev_sibling.kind() == "comment" {
405                    if let Ok(text) = prev_sibling.utf8_text(source_code.as_bytes()) {
406                        return Some(text.trim_start_matches('#').trim().to_owned());
407                    }
408                }
409            }
410            None
411        },
412    }
413}
414
415/// Extract parent class/struct name for methods
416pub fn extract_parent(node: Node<'_>, source_code: &str) -> Option<String> {
417    let mut current = node.parent()?;
418
419    while let Some(parent) = current.parent() {
420        if ["class_definition", "class_declaration", "struct_item", "impl_item"]
421            .contains(&parent.kind())
422        {
423            for child in parent.children(&mut parent.walk()) {
424                if child.kind() == "identifier" || child.kind() == "type_identifier" {
425                    if let Ok(name) = child.utf8_text(source_code.as_bytes()) {
426                        return Some(name.to_owned());
427                    }
428                }
429            }
430        }
431        current = parent;
432    }
433
434    None
435}
436
437/// Extract visibility modifier from a node
438pub fn extract_visibility(node: Node<'_>, source_code: &str, language: Language) -> Visibility {
439    match language {
440        Language::Python => {
441            if let Some(name_node) = node.child_by_field_name("name") {
442                if let Ok(name) = name_node.utf8_text(source_code.as_bytes()) {
443                    if name.starts_with("__") && !name.ends_with("__") {
444                        return Visibility::Private;
445                    } else if name.starts_with('_') {
446                        return Visibility::Protected;
447                    }
448                }
449            }
450            Visibility::Public
451        },
452        Language::Rust => {
453            for child in node.children(&mut node.walk()) {
454                if child.kind() == "visibility_modifier" {
455                    if let Ok(text) = child.utf8_text(source_code.as_bytes()) {
456                        if text.contains("pub(crate)") || text.contains("pub(super)") {
457                            return Visibility::Internal;
458                        } else if text.starts_with("pub") {
459                            return Visibility::Public;
460                        }
461                    }
462                }
463            }
464            Visibility::Private
465        },
466        Language::JavaScript | Language::TypeScript => {
467            for child in node.children(&mut node.walk()) {
468                let kind = child.kind();
469                if kind == "private" || kind == "accessibility_modifier" {
470                    if let Ok(text) = child.utf8_text(source_code.as_bytes()) {
471                        return match text {
472                            "private" => Visibility::Private,
473                            "protected" => Visibility::Protected,
474                            _ => Visibility::Public,
475                        };
476                    }
477                }
478            }
479            if let Some(name_node) = node.child_by_field_name("name") {
480                if let Ok(name) = name_node.utf8_text(source_code.as_bytes()) {
481                    if name.starts_with('#') {
482                        return Visibility::Private;
483                    }
484                }
485            }
486            Visibility::Public
487        },
488        Language::Go => {
489            if let Some(name_node) = node.child_by_field_name("name") {
490                if let Ok(name) = name_node.utf8_text(source_code.as_bytes()) {
491                    if let Some(first_char) = name.chars().next() {
492                        if first_char.is_lowercase() {
493                            return Visibility::Private;
494                        }
495                    }
496                }
497            }
498            Visibility::Public
499        },
500        Language::Java => {
501            for child in node.children(&mut node.walk()) {
502                if child.kind() == "modifiers" {
503                    if let Ok(text) = child.utf8_text(source_code.as_bytes()) {
504                        if text.contains("private") {
505                            return Visibility::Private;
506                        } else if text.contains("protected") {
507                            return Visibility::Protected;
508                        } else if text.contains("public") {
509                            return Visibility::Public;
510                        }
511                    }
512                }
513            }
514            Visibility::Internal
515        },
516        Language::C | Language::Cpp => {
517            for child in node.children(&mut node.walk()) {
518                if child.kind() == "storage_class_specifier" {
519                    if let Ok(text) = child.utf8_text(source_code.as_bytes()) {
520                        if text == "static" {
521                            return Visibility::Private;
522                        }
523                    }
524                }
525            }
526            Visibility::Public
527        },
528        Language::CSharp | Language::Kotlin | Language::Swift | Language::Scala => {
529            for child in node.children(&mut node.walk()) {
530                let kind = child.kind();
531                if kind == "modifier" || kind == "modifiers" || kind == "visibility_modifier" {
532                    if let Ok(text) = child.utf8_text(source_code.as_bytes()) {
533                        if text.contains("private") {
534                            return Visibility::Private;
535                        } else if text.contains("protected") {
536                            return Visibility::Protected;
537                        } else if text.contains("internal") {
538                            return Visibility::Internal;
539                        } else if text.contains("public") {
540                            return Visibility::Public;
541                        }
542                    }
543                }
544            }
545            Visibility::Internal
546        },
547        Language::Ruby => {
548            if let Some(name_node) = node.child_by_field_name("name") {
549                if let Ok(name) = name_node.utf8_text(source_code.as_bytes()) {
550                    if name.starts_with('_') {
551                        return Visibility::Private;
552                    }
553                }
554            }
555            Visibility::Public
556        },
557        Language::Php => {
558            for child in node.children(&mut node.walk()) {
559                if child.kind() == "visibility_modifier" {
560                    if let Ok(text) = child.utf8_text(source_code.as_bytes()) {
561                        return match text {
562                            "private" => Visibility::Private,
563                            "protected" => Visibility::Protected,
564                            "public" => Visibility::Public,
565                            _ => Visibility::Public,
566                        };
567                    }
568                }
569            }
570            Visibility::Public
571        },
572        Language::Bash => Visibility::Public,
573        Language::Haskell
574        | Language::Elixir
575        | Language::Clojure
576        | Language::OCaml
577        | Language::FSharp
578        | Language::Lua
579        | Language::R => Visibility::Public,
580    }
581}
582
583/// Extract function calls from a function/method body
584pub fn extract_calls(node: Node<'_>, source_code: &str, language: Language) -> Vec<String> {
585    let mut calls = HashSet::new();
586
587    let body_node = find_body_node(node, language);
588    if let Some(body) = body_node {
589        collect_calls_recursive(body, source_code, language, &mut calls);
590    }
591
592    if calls.is_empty() {
593        collect_calls_recursive(node, source_code, language, &mut calls);
594    }
595
596    calls.into_iter().collect()
597}
598
599/// Find the body node of a function/method
600pub fn find_body_node(node: Node<'_>, language: Language) -> Option<Node<'_>> {
601    match language {
602        Language::Python => {
603            for child in node.children(&mut node.walk()) {
604                if child.kind() == "block" {
605                    return Some(child);
606                }
607            }
608        },
609        Language::Rust => {
610            for child in node.children(&mut node.walk()) {
611                if child.kind() == "block" {
612                    return Some(child);
613                }
614            }
615        },
616        Language::JavaScript | Language::TypeScript => {
617            for child in node.children(&mut node.walk()) {
618                let kind = child.kind();
619                if kind == "statement_block" {
620                    return Some(child);
621                }
622                if kind == "arrow_function" {
623                    if let Some(body) = find_body_node(child, language) {
624                        return Some(body);
625                    }
626                    return Some(child);
627                }
628            }
629            if node.kind() == "arrow_function" {
630                for child in node.children(&mut node.walk()) {
631                    let kind = child.kind();
632                    if kind != "formal_parameters"
633                        && kind != "identifier"
634                        && kind != "=>"
635                        && kind != "("
636                        && kind != ")"
637                        && kind != ","
638                    {
639                        return Some(child);
640                    }
641                }
642                return Some(node);
643            }
644        },
645        Language::Go => {
646            for child in node.children(&mut node.walk()) {
647                if child.kind() == "block" {
648                    return Some(child);
649                }
650            }
651        },
652        Language::Java => {
653            for child in node.children(&mut node.walk()) {
654                if child.kind() == "block" {
655                    return Some(child);
656                }
657            }
658        },
659        Language::C | Language::Cpp => {
660            for child in node.children(&mut node.walk()) {
661                if child.kind() == "compound_statement" {
662                    return Some(child);
663                }
664            }
665        },
666        Language::CSharp | Language::Php | Language::Kotlin | Language::Swift | Language::Scala => {
667            for child in node.children(&mut node.walk()) {
668                let kind = child.kind();
669                if kind == "block" || kind == "compound_statement" || kind == "function_body" {
670                    return Some(child);
671                }
672            }
673        },
674        Language::Ruby => {
675            for child in node.children(&mut node.walk()) {
676                if child.kind() == "body_statement" || child.kind() == "do_block" {
677                    return Some(child);
678                }
679            }
680        },
681        Language::Bash => {
682            for child in node.children(&mut node.walk()) {
683                if child.kind() == "compound_statement" {
684                    return Some(child);
685                }
686            }
687        },
688        Language::Haskell
689        | Language::Elixir
690        | Language::Clojure
691        | Language::OCaml
692        | Language::FSharp
693        | Language::R => {
694            return Some(node);
695        },
696        Language::Lua => {
697            for child in node.children(&mut node.walk()) {
698                if child.kind() == "block" {
699                    return Some(child);
700                }
701            }
702        },
703    }
704    None
705}
706
707/// Maximum recursion depth for AST traversal to prevent stack overflow
708/// on deeply nested or malformed code (e.g., 75K+ nodes).
709const MAX_RECURSION_DEPTH: usize = 1000;
710
711/// Recursively collect function calls from a node
712///
713/// Uses a depth limit to prevent stack overflow on deeply nested code.
714pub fn collect_calls_recursive(
715    node: Node<'_>,
716    source_code: &str,
717    language: Language,
718    calls: &mut HashSet<String>,
719) {
720    collect_calls_recursive_with_depth(node, source_code, language, calls, 0);
721}
722
723/// Internal recursive function with depth tracking
724fn collect_calls_recursive_with_depth(
725    node: Node<'_>,
726    source_code: &str,
727    language: Language,
728    calls: &mut HashSet<String>,
729    depth: usize,
730) {
731    // Prevent stack overflow on deeply nested code
732    if depth >= MAX_RECURSION_DEPTH {
733        return;
734    }
735
736    let kind = node.kind();
737
738    let call_name = match language {
739        Language::Python => {
740            if kind == "call" {
741                node.child_by_field_name("function").and_then(|f| {
742                    if f.kind() == "identifier" {
743                        f.utf8_text(source_code.as_bytes()).ok().map(String::from)
744                    } else if f.kind() == "attribute" {
745                        f.child_by_field_name("attribute")
746                            .and_then(|a| a.utf8_text(source_code.as_bytes()).ok())
747                            .map(String::from)
748                    } else {
749                        None
750                    }
751                })
752            } else {
753                None
754            }
755        },
756        Language::Rust => {
757            if kind == "call_expression" {
758                node.child_by_field_name("function").and_then(|f| {
759                    if f.kind() == "identifier" {
760                        f.utf8_text(source_code.as_bytes()).ok().map(String::from)
761                    } else if f.kind() == "field_expression" {
762                        f.child_by_field_name("field")
763                            .and_then(|a| a.utf8_text(source_code.as_bytes()).ok())
764                            .map(String::from)
765                    } else if f.kind() == "scoped_identifier" {
766                        f.utf8_text(source_code.as_bytes()).ok().map(String::from)
767                    } else {
768                        None
769                    }
770                })
771            } else if kind == "macro_invocation" {
772                node.child_by_field_name("macro")
773                    .and_then(|m| m.utf8_text(source_code.as_bytes()).ok())
774                    .map(|s| format!("{}!", s))
775            } else {
776                None
777            }
778        },
779        Language::JavaScript | Language::TypeScript => {
780            if kind == "call_expression" {
781                node.child_by_field_name("function").and_then(|f| {
782                    if f.kind() == "identifier" {
783                        f.utf8_text(source_code.as_bytes()).ok().map(String::from)
784                    } else if f.kind() == "member_expression" {
785                        f.child_by_field_name("property")
786                            .and_then(|p| p.utf8_text(source_code.as_bytes()).ok())
787                            .map(String::from)
788                    } else {
789                        None
790                    }
791                })
792            } else {
793                None
794            }
795        },
796        Language::Go => {
797            if kind == "call_expression" {
798                node.child_by_field_name("function").and_then(|f| {
799                    if f.kind() == "identifier" {
800                        f.utf8_text(source_code.as_bytes()).ok().map(String::from)
801                    } else if f.kind() == "selector_expression" {
802                        f.child_by_field_name("field")
803                            .and_then(|a| a.utf8_text(source_code.as_bytes()).ok())
804                            .map(String::from)
805                    } else {
806                        None
807                    }
808                })
809            } else {
810                None
811            }
812        },
813        Language::Java => {
814            if kind == "method_invocation" {
815                node.child_by_field_name("name")
816                    .and_then(|n| n.utf8_text(source_code.as_bytes()).ok())
817                    .map(String::from)
818            } else {
819                None
820            }
821        },
822        Language::C | Language::Cpp => {
823            if kind == "call_expression" {
824                node.child_by_field_name("function").and_then(|f| {
825                    if f.kind() == "identifier" {
826                        f.utf8_text(source_code.as_bytes()).ok().map(String::from)
827                    } else if f.kind() == "field_expression" {
828                        f.child_by_field_name("field")
829                            .and_then(|a| a.utf8_text(source_code.as_bytes()).ok())
830                            .map(String::from)
831                    } else {
832                        None
833                    }
834                })
835            } else {
836                None
837            }
838        },
839        Language::CSharp | Language::Php | Language::Kotlin | Language::Swift | Language::Scala => {
840            if kind == "invocation_expression" || kind == "call_expression" {
841                node.children(&mut node.walk())
842                    .find(|child| child.kind() == "identifier" || child.kind() == "simple_name")
843                    .and_then(|child| child.utf8_text(source_code.as_bytes()).ok())
844                    .map(|s| s.to_owned())
845            } else {
846                None
847            }
848        },
849        Language::Ruby => {
850            if kind == "call" || kind == "method_call" {
851                node.child_by_field_name("method")
852                    .and_then(|m| m.utf8_text(source_code.as_bytes()).ok())
853                    .map(String::from)
854            } else {
855                None
856            }
857        },
858        Language::Bash => {
859            if kind == "command" {
860                node.child_by_field_name("name")
861                    .and_then(|n| n.utf8_text(source_code.as_bytes()).ok())
862                    .map(String::from)
863            } else {
864                None
865            }
866        },
867        Language::Haskell
868        | Language::Elixir
869        | Language::Clojure
870        | Language::OCaml
871        | Language::FSharp
872        | Language::Lua
873        | Language::R => {
874            if kind == "function_call" || kind == "call" || kind == "application" {
875                node.children(&mut node.walk())
876                    .find(|child| child.kind() == "identifier" || child.kind() == "variable")
877                    .and_then(|child| child.utf8_text(source_code.as_bytes()).ok())
878                    .map(|s| s.to_owned())
879            } else {
880                None
881            }
882        },
883    };
884
885    if let Some(name) = call_name {
886        if !is_builtin(&name, language) {
887            calls.insert(name);
888        }
889    }
890
891    for child in node.children(&mut node.walk()) {
892        collect_calls_recursive_with_depth(child, source_code, language, calls, depth + 1);
893    }
894}
895
896/// Check if a function name is a common built-in
897pub fn is_builtin(name: &str, language: Language) -> bool {
898    match language {
899        Language::Python => {
900            matches!(
901                name,
902                "print"
903                    | "len"
904                    | "range"
905                    | "str"
906                    | "int"
907                    | "float"
908                    | "list"
909                    | "dict"
910                    | "set"
911                    | "tuple"
912                    | "bool"
913                    | "type"
914                    | "isinstance"
915                    | "hasattr"
916                    | "getattr"
917                    | "setattr"
918                    | "super"
919                    | "iter"
920                    | "next"
921                    | "open"
922                    | "input"
923                    | "format"
924                    | "enumerate"
925                    | "zip"
926                    | "map"
927                    | "filter"
928                    | "sorted"
929                    | "reversed"
930                    | "sum"
931                    | "min"
932                    | "max"
933                    | "abs"
934                    | "round"
935                    | "ord"
936                    | "chr"
937                    | "hex"
938                    | "bin"
939                    | "oct"
940            )
941        },
942        Language::JavaScript | Language::TypeScript => {
943            matches!(
944                name,
945                "console"
946                    | "log"
947                    | "error"
948                    | "warn"
949                    | "parseInt"
950                    | "parseFloat"
951                    | "setTimeout"
952                    | "setInterval"
953                    | "clearTimeout"
954                    | "clearInterval"
955                    | "JSON"
956                    | "stringify"
957                    | "parse"
958                    | "toString"
959                    | "valueOf"
960                    | "push"
961                    | "pop"
962                    | "shift"
963                    | "unshift"
964                    | "slice"
965                    | "splice"
966                    | "map"
967                    | "filter"
968                    | "reduce"
969                    | "forEach"
970                    | "find"
971                    | "findIndex"
972                    | "includes"
973                    | "indexOf"
974                    | "join"
975                    | "split"
976                    | "replace"
977            )
978        },
979        Language::Rust => {
980            matches!(
981                name,
982                "println!"
983                    | "print!"
984                    | "eprintln!"
985                    | "eprint!"
986                    | "format!"
987                    | "vec!"
988                    | "panic!"
989                    | "assert!"
990                    | "assert_eq!"
991                    | "assert_ne!"
992                    | "debug!"
993                    | "info!"
994                    | "warn!"
995                    | "error!"
996                    | "trace!"
997                    | "unwrap"
998                    | "expect"
999                    | "ok"
1000                    | "err"
1001                    | "some"
1002                    | "none"
1003                    | "clone"
1004                    | "to_string"
1005                    | "into"
1006                    | "from"
1007                    | "default"
1008                    | "iter"
1009                    | "into_iter"
1010                    | "collect"
1011                    | "map"
1012                    | "filter"
1013            )
1014        },
1015        Language::Go => {
1016            matches!(
1017                name,
1018                "fmt"
1019                    | "Println"
1020                    | "Printf"
1021                    | "Sprintf"
1022                    | "Errorf"
1023                    | "make"
1024                    | "new"
1025                    | "len"
1026                    | "cap"
1027                    | "append"
1028                    | "copy"
1029                    | "delete"
1030                    | "close"
1031                    | "panic"
1032                    | "recover"
1033                    | "print"
1034            )
1035        },
1036        Language::Java => {
1037            matches!(
1038                name,
1039                "println"
1040                    | "print"
1041                    | "printf"
1042                    | "toString"
1043                    | "equals"
1044                    | "hashCode"
1045                    | "getClass"
1046                    | "clone"
1047                    | "notify"
1048                    | "wait"
1049                    | "get"
1050                    | "set"
1051                    | "add"
1052                    | "remove"
1053                    | "size"
1054                    | "isEmpty"
1055                    | "contains"
1056                    | "iterator"
1057                    | "valueOf"
1058                    | "parseInt"
1059            )
1060        },
1061        Language::C | Language::Cpp => {
1062            matches!(
1063                name,
1064                "printf"
1065                    | "scanf"
1066                    | "malloc"
1067                    | "free"
1068                    | "memcpy"
1069                    | "memset"
1070                    | "strlen"
1071                    | "strcpy"
1072                    | "strcmp"
1073                    | "strcat"
1074                    | "sizeof"
1075                    | "cout"
1076                    | "cin"
1077                    | "endl"
1078                    | "cerr"
1079                    | "clog"
1080            )
1081        },
1082        Language::CSharp => {
1083            matches!(
1084                name,
1085                "WriteLine"
1086                    | "Write"
1087                    | "ReadLine"
1088                    | "ToString"
1089                    | "Equals"
1090                    | "GetHashCode"
1091                    | "GetType"
1092                    | "Add"
1093                    | "Remove"
1094                    | "Contains"
1095                    | "Count"
1096                    | "Clear"
1097                    | "ToList"
1098                    | "ToArray"
1099            )
1100        },
1101        Language::Ruby => {
1102            matches!(
1103                name,
1104                "puts"
1105                    | "print"
1106                    | "p"
1107                    | "gets"
1108                    | "each"
1109                    | "map"
1110                    | "select"
1111                    | "reject"
1112                    | "reduce"
1113                    | "inject"
1114                    | "find"
1115                    | "any?"
1116                    | "all?"
1117                    | "include?"
1118                    | "empty?"
1119                    | "nil?"
1120                    | "length"
1121                    | "size"
1122            )
1123        },
1124        Language::Php => {
1125            matches!(
1126                name,
1127                "echo"
1128                    | "print"
1129                    | "var_dump"
1130                    | "print_r"
1131                    | "isset"
1132                    | "empty"
1133                    | "array"
1134                    | "count"
1135                    | "strlen"
1136                    | "strpos"
1137                    | "substr"
1138                    | "explode"
1139                    | "implode"
1140                    | "json_encode"
1141                    | "json_decode"
1142            )
1143        },
1144        Language::Kotlin => {
1145            matches!(
1146                name,
1147                "println"
1148                    | "print"
1149                    | "readLine"
1150                    | "toString"
1151                    | "equals"
1152                    | "hashCode"
1153                    | "map"
1154                    | "filter"
1155                    | "forEach"
1156                    | "let"
1157                    | "also"
1158                    | "apply"
1159                    | "run"
1160                    | "with"
1161                    | "listOf"
1162                    | "mapOf"
1163                    | "setOf"
1164            )
1165        },
1166        Language::Swift => {
1167            matches!(
1168                name,
1169                "print"
1170                    | "debugPrint"
1171                    | "dump"
1172                    | "map"
1173                    | "filter"
1174                    | "reduce"
1175                    | "forEach"
1176                    | "contains"
1177                    | "count"
1178                    | "isEmpty"
1179                    | "append"
1180            )
1181        },
1182        Language::Scala => {
1183            matches!(
1184                name,
1185                "println"
1186                    | "print"
1187                    | "map"
1188                    | "filter"
1189                    | "flatMap"
1190                    | "foreach"
1191                    | "reduce"
1192                    | "fold"
1193                    | "foldLeft"
1194                    | "foldRight"
1195                    | "collect"
1196            )
1197        },
1198        Language::Bash
1199        | Language::Haskell
1200        | Language::Elixir
1201        | Language::Clojure
1202        | Language::OCaml
1203        | Language::FSharp
1204        | Language::Lua
1205        | Language::R => false,
1206    }
1207}
1208
1209/// Clean JSDoc comment
1210pub fn clean_jsdoc(text: &str) -> String {
1211    text.lines()
1212        .map(|line| {
1213            line.trim()
1214                .trim_start_matches("/**")
1215                .trim_start_matches("/*")
1216                .trim_start_matches('*')
1217                .trim_end_matches("*/")
1218                .trim()
1219        })
1220        .filter(|line| !line.is_empty())
1221        .collect::<Vec<_>>()
1222        .join(" ")
1223}
1224
1225/// Clean JavaDoc comment
1226pub fn clean_javadoc(text: &str) -> String {
1227    clean_jsdoc(text)
1228}
1229
1230/// Extract class inheritance (extends) and interface implementations (implements)
1231pub fn extract_inheritance(
1232    node: Node<'_>,
1233    source_code: &str,
1234    language: Language,
1235) -> (Option<String>, Vec<String>) {
1236    let mut extends = None;
1237    let mut implements = Vec::new();
1238
1239    match language {
1240        Language::Python => {
1241            // Python: class Foo(Bar, Baz): - all are considered base classes
1242            if node.kind() == "class_definition" {
1243                if let Some(args) = node.child_by_field_name("superclasses") {
1244                    for child in args.children(&mut args.walk()) {
1245                        if child.kind() == "identifier" || child.kind() == "attribute" {
1246                            if let Ok(name) = child.utf8_text(source_code.as_bytes()) {
1247                                if extends.is_none() {
1248                                    extends = Some(name.to_owned());
1249                                } else {
1250                                    implements.push(name.to_owned());
1251                                }
1252                            }
1253                        }
1254                    }
1255                }
1256            }
1257        },
1258        Language::JavaScript | Language::TypeScript => {
1259            // JS/TS: class Foo extends Bar implements Baz
1260            if node.kind() == "class_declaration" || node.kind() == "class" {
1261                for child in node.children(&mut node.walk()) {
1262                    if child.kind() == "class_heritage" {
1263                        for heritage in child.children(&mut child.walk()) {
1264                            if heritage.kind() == "extends_clause" {
1265                                for type_node in heritage.children(&mut heritage.walk()) {
1266                                    if type_node.kind() == "identifier"
1267                                        || type_node.kind() == "type_identifier"
1268                                    {
1269                                        if let Ok(name) =
1270                                            type_node.utf8_text(source_code.as_bytes())
1271                                        {
1272                                            extends = Some(name.to_owned());
1273                                        }
1274                                    }
1275                                }
1276                            } else if heritage.kind() == "implements_clause" {
1277                                for type_node in heritage.children(&mut heritage.walk()) {
1278                                    if type_node.kind() == "identifier"
1279                                        || type_node.kind() == "type_identifier"
1280                                    {
1281                                        if let Ok(name) =
1282                                            type_node.utf8_text(source_code.as_bytes())
1283                                        {
1284                                            implements.push(name.to_owned());
1285                                        }
1286                                    }
1287                                }
1288                            }
1289                        }
1290                    }
1291                }
1292            }
1293        },
1294        Language::Rust => {
1295            // Rust doesn't have class inheritance, but has trait implementations
1296            // impl Trait for Struct
1297            if node.kind() == "impl_item" {
1298                let mut has_for = false;
1299                for child in node.children(&mut node.walk()) {
1300                    if child.kind() == "for" {
1301                        has_for = true;
1302                    }
1303                    if child.kind() == "type_identifier" || child.kind() == "generic_type" {
1304                        if let Ok(name) = child.utf8_text(source_code.as_bytes()) {
1305                            if has_for {
1306                                // This is the struct being implemented
1307                            } else {
1308                                // This is the trait being implemented
1309                                implements.push(name.to_owned());
1310                            }
1311                        }
1312                    }
1313                }
1314            }
1315        },
1316        Language::Go => {
1317            // Go uses embedding for "inheritance"
1318            if node.kind() == "type_declaration" {
1319                for child in node.children(&mut node.walk()) {
1320                    if child.kind() == "type_spec" {
1321                        for spec_child in child.children(&mut child.walk()) {
1322                            if spec_child.kind() == "struct_type" {
1323                                for field in spec_child.children(&mut spec_child.walk()) {
1324                                    if field.kind() == "field_declaration" {
1325                                        // Embedded field (no name, just type)
1326                                        let has_name = field.child_by_field_name("name").is_some();
1327                                        if !has_name {
1328                                            if let Some(type_node) =
1329                                                field.child_by_field_name("type")
1330                                            {
1331                                                if let Ok(name) =
1332                                                    type_node.utf8_text(source_code.as_bytes())
1333                                                {
1334                                                    implements.push(name.to_owned());
1335                                                }
1336                                            }
1337                                        }
1338                                    }
1339                                }
1340                            }
1341                        }
1342                    }
1343                }
1344            }
1345        },
1346        Language::Java => {
1347            // Java: class Foo extends Bar implements Baz, Qux
1348            if node.kind() == "class_declaration" {
1349                for child in node.children(&mut node.walk()) {
1350                    if child.kind() == "superclass" {
1351                        for type_node in child.children(&mut child.walk()) {
1352                            if type_node.kind() == "type_identifier" {
1353                                if let Ok(name) = type_node.utf8_text(source_code.as_bytes()) {
1354                                    extends = Some(name.to_owned());
1355                                }
1356                            }
1357                        }
1358                    } else if child.kind() == "super_interfaces" {
1359                        for type_list in child.children(&mut child.walk()) {
1360                            if type_list.kind() == "type_list" {
1361                                for type_node in type_list.children(&mut type_list.walk()) {
1362                                    if type_node.kind() == "type_identifier" {
1363                                        if let Ok(name) =
1364                                            type_node.utf8_text(source_code.as_bytes())
1365                                        {
1366                                            implements.push(name.to_owned());
1367                                        }
1368                                    }
1369                                }
1370                            }
1371                        }
1372                    }
1373                }
1374            }
1375        },
1376        Language::C | Language::Cpp => {
1377            // C++: class Foo : public Bar, public Baz
1378            if node.kind() == "class_specifier" || node.kind() == "struct_specifier" {
1379                for child in node.children(&mut node.walk()) {
1380                    if child.kind() == "base_class_clause" {
1381                        for base in child.children(&mut child.walk()) {
1382                            if base.kind() == "type_identifier" {
1383                                if let Ok(name) = base.utf8_text(source_code.as_bytes()) {
1384                                    if extends.is_none() {
1385                                        extends = Some(name.to_owned());
1386                                    } else {
1387                                        implements.push(name.to_owned());
1388                                    }
1389                                }
1390                            }
1391                        }
1392                    }
1393                }
1394            }
1395        },
1396        Language::CSharp => {
1397            // C#: class Foo : Bar, IBaz
1398            if node.kind() == "class_declaration" {
1399                for child in node.children(&mut node.walk()) {
1400                    if child.kind() == "base_list" {
1401                        for base in child.children(&mut child.walk()) {
1402                            if base.kind() == "identifier" || base.kind() == "generic_name" {
1403                                if let Ok(name) = base.utf8_text(source_code.as_bytes()) {
1404                                    if name.starts_with('I') && name.len() > 1 {
1405                                        // Convention: interfaces start with I
1406                                        implements.push(name.to_owned());
1407                                    } else if extends.is_none() {
1408                                        extends = Some(name.to_owned());
1409                                    } else {
1410                                        implements.push(name.to_owned());
1411                                    }
1412                                }
1413                            }
1414                        }
1415                    }
1416                }
1417            }
1418        },
1419        Language::Ruby => {
1420            // Ruby: class Foo < Bar; include Baz
1421            if node.kind() == "class" {
1422                for child in node.children(&mut node.walk()) {
1423                    if child.kind() == "superclass" {
1424                        for type_node in child.children(&mut child.walk()) {
1425                            if type_node.kind() == "constant" {
1426                                if let Ok(name) = type_node.utf8_text(source_code.as_bytes()) {
1427                                    extends = Some(name.to_owned());
1428                                }
1429                            }
1430                        }
1431                    }
1432                }
1433            }
1434        },
1435        Language::Php => {
1436            // PHP: class Foo extends Bar implements Baz
1437            if node.kind() == "class_declaration" {
1438                for child in node.children(&mut node.walk()) {
1439                    if child.kind() == "base_clause" {
1440                        for type_node in child.children(&mut child.walk()) {
1441                            if type_node.kind() == "name" {
1442                                if let Ok(name) = type_node.utf8_text(source_code.as_bytes()) {
1443                                    extends = Some(name.to_owned());
1444                                }
1445                            }
1446                        }
1447                    } else if child.kind() == "class_interface_clause" {
1448                        for type_node in child.children(&mut child.walk()) {
1449                            if type_node.kind() == "name" {
1450                                if let Ok(name) = type_node.utf8_text(source_code.as_bytes()) {
1451                                    implements.push(name.to_owned());
1452                                }
1453                            }
1454                        }
1455                    }
1456                }
1457            }
1458        },
1459        Language::Kotlin => {
1460            // Kotlin: class Foo : Bar(), Baz
1461            if node.kind() == "class_declaration" {
1462                for child in node.children(&mut node.walk()) {
1463                    if child.kind() == "delegation_specifiers" {
1464                        for spec in child.children(&mut child.walk()) {
1465                            if spec.kind() == "delegation_specifier" {
1466                                for type_node in spec.children(&mut spec.walk()) {
1467                                    if type_node.kind() == "user_type" {
1468                                        if let Ok(name) =
1469                                            type_node.utf8_text(source_code.as_bytes())
1470                                        {
1471                                            if extends.is_none() {
1472                                                extends = Some(name.to_owned());
1473                                            } else {
1474                                                implements.push(name.to_owned());
1475                                            }
1476                                        }
1477                                    }
1478                                }
1479                            }
1480                        }
1481                    }
1482                }
1483            }
1484        },
1485        Language::Swift => {
1486            // Swift: class Foo: Bar, Protocol
1487            if node.kind() == "class_declaration" {
1488                for child in node.children(&mut node.walk()) {
1489                    if child.kind() == "type_inheritance_clause" {
1490                        for type_node in child.children(&mut child.walk()) {
1491                            if type_node.kind() == "type_identifier" {
1492                                if let Ok(name) = type_node.utf8_text(source_code.as_bytes()) {
1493                                    if extends.is_none() {
1494                                        extends = Some(name.to_owned());
1495                                    } else {
1496                                        implements.push(name.to_owned());
1497                                    }
1498                                }
1499                            }
1500                        }
1501                    }
1502                }
1503            }
1504        },
1505        Language::Scala => {
1506            // Scala: class Foo extends Bar with Baz
1507            if node.kind() == "class_definition" {
1508                for child in node.children(&mut node.walk()) {
1509                    if child.kind() == "extends_clause" {
1510                        for type_node in child.children(&mut child.walk()) {
1511                            if type_node.kind() == "type_identifier" {
1512                                if let Ok(name) = type_node.utf8_text(source_code.as_bytes()) {
1513                                    if extends.is_none() {
1514                                        extends = Some(name.to_owned());
1515                                    } else {
1516                                        implements.push(name.to_owned());
1517                                    }
1518                                }
1519                            }
1520                        }
1521                    }
1522                }
1523            }
1524        },
1525        Language::Bash
1526        | Language::Haskell
1527        | Language::Elixir
1528        | Language::Clojure
1529        | Language::OCaml
1530        | Language::FSharp
1531        | Language::Lua
1532        | Language::R => {},
1533    }
1534
1535    (extends, implements)
1536}
1537
1538/// Map capture name to SymbolKind
1539pub fn map_symbol_kind(capture_name: &str) -> SymbolKind {
1540    match capture_name {
1541        "function" => SymbolKind::Function,
1542        "class" => SymbolKind::Class,
1543        "method" => SymbolKind::Method,
1544        "struct" => SymbolKind::Struct,
1545        "enum" => SymbolKind::Enum,
1546        "interface" => SymbolKind::Interface,
1547        "trait" => SymbolKind::Trait,
1548        _ => SymbolKind::Function,
1549    }
1550}
1551
1552#[cfg(test)]
1553mod tests {
1554    use super::*;
1555
1556    // ==========================================================================
1557    // safe_char_boundary tests
1558    // ==========================================================================
1559
1560    #[test]
1561    fn test_safe_char_boundary_ascii() {
1562        let s = "hello world";
1563        assert_eq!(safe_char_boundary(s, 0), 0);
1564        assert_eq!(safe_char_boundary(s, 5), 5);
1565        assert_eq!(safe_char_boundary(s, 11), 11);
1566    }
1567
1568    #[test]
1569    fn test_safe_char_boundary_beyond_length() {
1570        let s = "hello";
1571        assert_eq!(safe_char_boundary(s, 100), 5);
1572        assert_eq!(safe_char_boundary(s, 5), 5);
1573    }
1574
1575    #[test]
1576    fn test_safe_char_boundary_empty_string() {
1577        let s = "";
1578        assert_eq!(safe_char_boundary(s, 0), 0);
1579        assert_eq!(safe_char_boundary(s, 10), 0);
1580    }
1581
1582    #[test]
1583    fn test_safe_char_boundary_multibyte_utf8() {
1584        // Chinese character "中" is 3 bytes: E4 B8 AD
1585        let s = "中文";
1586        // Index 0 is valid (start of first char)
1587        assert_eq!(safe_char_boundary(s, 0), 0);
1588        // Index 1 is in the middle of "中", should back up to 0
1589        assert_eq!(safe_char_boundary(s, 1), 0);
1590        // Index 2 is also in the middle
1591        assert_eq!(safe_char_boundary(s, 2), 0);
1592        // Index 3 is the start of "æ–‡"
1593        assert_eq!(safe_char_boundary(s, 3), 3);
1594        // Index 4 is in the middle of "æ–‡"
1595        assert_eq!(safe_char_boundary(s, 4), 3);
1596    }
1597
1598    #[test]
1599    fn test_safe_char_boundary_emoji() {
1600        // "👋" emoji is 4 bytes
1601        let s = "Hello 👋 World";
1602        // The emoji starts at byte 6
1603        assert_eq!(safe_char_boundary(s, 6), 6);
1604        // Middle of emoji should back up
1605        assert_eq!(safe_char_boundary(s, 7), 6);
1606        assert_eq!(safe_char_boundary(s, 8), 6);
1607        assert_eq!(safe_char_boundary(s, 9), 6);
1608        // After emoji (byte 10)
1609        assert_eq!(safe_char_boundary(s, 10), 10);
1610    }
1611
1612    #[test]
1613    fn test_safe_char_boundary_mixed_content() {
1614        // Mix of ASCII and multi-byte
1615        let s = "aбв"; // 'a' is 1 byte, 'б' and 'в' are 2 bytes each
1616        assert_eq!(safe_char_boundary(s, 0), 0);
1617        assert_eq!(safe_char_boundary(s, 1), 1); // Start of 'б'
1618        assert_eq!(safe_char_boundary(s, 2), 1); // Middle of 'б', back to 1
1619        assert_eq!(safe_char_boundary(s, 3), 3); // Start of 'в'
1620        assert_eq!(safe_char_boundary(s, 4), 3); // Middle of 'в'
1621        assert_eq!(safe_char_boundary(s, 5), 5); // End
1622    }
1623
1624    // ==========================================================================
1625    // clean_jsdoc tests
1626    // ==========================================================================
1627
1628    #[test]
1629    fn test_clean_jsdoc_simple() {
1630        let input = "/** This is a simple doc */";
1631        assert_eq!(clean_jsdoc(input), "This is a simple doc");
1632    }
1633
1634    #[test]
1635    fn test_clean_jsdoc_multiline() {
1636        let input = "/**\n * Line 1\n * Line 2\n */";
1637        let result = clean_jsdoc(input);
1638        // Trailing slash is kept when on its own line
1639        assert!(result.contains("Line 1"));
1640        assert!(result.contains("Line 2"));
1641    }
1642
1643    #[test]
1644    fn test_clean_jsdoc_with_asterisks() {
1645        let input = "/**\n * First line\n * Second line\n * Third line\n */";
1646        let result = clean_jsdoc(input);
1647        assert!(result.contains("First line"));
1648        assert!(result.contains("Second line"));
1649        assert!(result.contains("Third line"));
1650    }
1651
1652    #[test]
1653    fn test_clean_jsdoc_empty() {
1654        let input = "/** */";
1655        assert_eq!(clean_jsdoc(input), "");
1656    }
1657
1658    #[test]
1659    fn test_clean_jsdoc_c_style_comment() {
1660        let input = "/* Regular C comment */";
1661        assert_eq!(clean_jsdoc(input), "Regular C comment");
1662    }
1663
1664    #[test]
1665    fn test_clean_jsdoc_with_tags() {
1666        let input = "/**\n * Description\n * @param x The x value\n * @returns Result\n */";
1667        let result = clean_jsdoc(input);
1668        assert!(result.contains("Description"));
1669        assert!(result.contains("@param x"));
1670        assert!(result.contains("@returns"));
1671    }
1672
1673    #[test]
1674    fn test_clean_jsdoc_whitespace_handling() {
1675        let input = "/**   \n   *    Lots of spaces    \n   */";
1676        assert!(clean_jsdoc(input).contains("Lots of spaces"));
1677    }
1678
1679    // ==========================================================================
1680    // clean_javadoc tests
1681    // ==========================================================================
1682
1683    #[test]
1684    fn test_clean_javadoc_simple() {
1685        let input = "/** JavaDoc comment */";
1686        assert_eq!(clean_javadoc(input), "JavaDoc comment");
1687    }
1688
1689    #[test]
1690    fn test_clean_javadoc_multiline() {
1691        let input = "/**\n * Method description.\n * @param name The name\n */";
1692        let result = clean_javadoc(input);
1693        assert!(result.contains("Method description"));
1694        assert!(result.contains("@param name"));
1695    }
1696
1697    // ==========================================================================
1698    // map_symbol_kind tests
1699    // ==========================================================================
1700
1701    #[test]
1702    fn test_map_symbol_kind_function() {
1703        assert_eq!(map_symbol_kind("function"), SymbolKind::Function);
1704    }
1705
1706    #[test]
1707    fn test_map_symbol_kind_class() {
1708        assert_eq!(map_symbol_kind("class"), SymbolKind::Class);
1709    }
1710
1711    #[test]
1712    fn test_map_symbol_kind_method() {
1713        assert_eq!(map_symbol_kind("method"), SymbolKind::Method);
1714    }
1715
1716    #[test]
1717    fn test_map_symbol_kind_struct() {
1718        assert_eq!(map_symbol_kind("struct"), SymbolKind::Struct);
1719    }
1720
1721    #[test]
1722    fn test_map_symbol_kind_enum() {
1723        assert_eq!(map_symbol_kind("enum"), SymbolKind::Enum);
1724    }
1725
1726    #[test]
1727    fn test_map_symbol_kind_interface() {
1728        assert_eq!(map_symbol_kind("interface"), SymbolKind::Interface);
1729    }
1730
1731    #[test]
1732    fn test_map_symbol_kind_trait() {
1733        assert_eq!(map_symbol_kind("trait"), SymbolKind::Trait);
1734    }
1735
1736    #[test]
1737    fn test_map_symbol_kind_unknown() {
1738        // Unknown capture names default to Function
1739        assert_eq!(map_symbol_kind("unknown"), SymbolKind::Function);
1740        assert_eq!(map_symbol_kind(""), SymbolKind::Function);
1741        assert_eq!(map_symbol_kind("random"), SymbolKind::Function);
1742    }
1743
1744    // ==========================================================================
1745    // is_builtin tests - Python
1746    // ==========================================================================
1747
1748    #[test]
1749    fn test_is_builtin_python_print() {
1750        assert!(is_builtin("print", Language::Python));
1751        assert!(is_builtin("len", Language::Python));
1752        assert!(is_builtin("range", Language::Python));
1753        assert!(is_builtin("str", Language::Python));
1754        assert!(is_builtin("int", Language::Python));
1755        assert!(is_builtin("float", Language::Python));
1756        assert!(is_builtin("list", Language::Python));
1757        assert!(is_builtin("dict", Language::Python));
1758        assert!(is_builtin("set", Language::Python));
1759        assert!(is_builtin("tuple", Language::Python));
1760    }
1761
1762    #[test]
1763    fn test_is_builtin_python_type_funcs() {
1764        assert!(is_builtin("bool", Language::Python));
1765        assert!(is_builtin("type", Language::Python));
1766        assert!(is_builtin("isinstance", Language::Python));
1767        assert!(is_builtin("hasattr", Language::Python));
1768        assert!(is_builtin("getattr", Language::Python));
1769        assert!(is_builtin("setattr", Language::Python));
1770        assert!(is_builtin("super", Language::Python));
1771    }
1772
1773    #[test]
1774    fn test_is_builtin_python_itertools() {
1775        assert!(is_builtin("iter", Language::Python));
1776        assert!(is_builtin("next", Language::Python));
1777        assert!(is_builtin("enumerate", Language::Python));
1778        assert!(is_builtin("zip", Language::Python));
1779        assert!(is_builtin("map", Language::Python));
1780        assert!(is_builtin("filter", Language::Python));
1781        assert!(is_builtin("sorted", Language::Python));
1782        assert!(is_builtin("reversed", Language::Python));
1783    }
1784
1785    #[test]
1786    fn test_is_builtin_python_math() {
1787        assert!(is_builtin("sum", Language::Python));
1788        assert!(is_builtin("min", Language::Python));
1789        assert!(is_builtin("max", Language::Python));
1790        assert!(is_builtin("abs", Language::Python));
1791        assert!(is_builtin("round", Language::Python));
1792    }
1793
1794    #[test]
1795    fn test_is_builtin_python_not_builtin() {
1796        assert!(!is_builtin("my_function", Language::Python));
1797        assert!(!is_builtin("custom_print", Language::Python));
1798        assert!(!is_builtin("calculate", Language::Python));
1799    }
1800
1801    // ==========================================================================
1802    // is_builtin tests - JavaScript/TypeScript
1803    // ==========================================================================
1804
1805    #[test]
1806    fn test_is_builtin_js_console() {
1807        assert!(is_builtin("console", Language::JavaScript));
1808        assert!(is_builtin("log", Language::JavaScript));
1809        assert!(is_builtin("error", Language::JavaScript));
1810        assert!(is_builtin("warn", Language::JavaScript));
1811    }
1812
1813    #[test]
1814    fn test_is_builtin_js_parsing() {
1815        assert!(is_builtin("parseInt", Language::JavaScript));
1816        assert!(is_builtin("parseFloat", Language::JavaScript));
1817        assert!(is_builtin("JSON", Language::JavaScript));
1818        assert!(is_builtin("stringify", Language::JavaScript));
1819        assert!(is_builtin("parse", Language::JavaScript));
1820    }
1821
1822    #[test]
1823    fn test_is_builtin_js_timers() {
1824        assert!(is_builtin("setTimeout", Language::JavaScript));
1825        assert!(is_builtin("setInterval", Language::JavaScript));
1826        assert!(is_builtin("clearTimeout", Language::JavaScript));
1827        assert!(is_builtin("clearInterval", Language::JavaScript));
1828    }
1829
1830    #[test]
1831    fn test_is_builtin_js_array_methods() {
1832        assert!(is_builtin("push", Language::JavaScript));
1833        assert!(is_builtin("pop", Language::JavaScript));
1834        assert!(is_builtin("shift", Language::JavaScript));
1835        assert!(is_builtin("unshift", Language::JavaScript));
1836        assert!(is_builtin("slice", Language::JavaScript));
1837        assert!(is_builtin("splice", Language::JavaScript));
1838        assert!(is_builtin("map", Language::JavaScript));
1839        assert!(is_builtin("filter", Language::JavaScript));
1840        assert!(is_builtin("reduce", Language::JavaScript));
1841        assert!(is_builtin("forEach", Language::JavaScript));
1842    }
1843
1844    #[test]
1845    fn test_is_builtin_ts_same_as_js() {
1846        assert!(is_builtin("console", Language::TypeScript));
1847        assert!(is_builtin("map", Language::TypeScript));
1848        assert!(is_builtin("filter", Language::TypeScript));
1849    }
1850
1851    #[test]
1852    fn test_is_builtin_js_not_builtin() {
1853        assert!(!is_builtin("myFunction", Language::JavaScript));
1854        assert!(!is_builtin("customLog", Language::JavaScript));
1855    }
1856
1857    // ==========================================================================
1858    // is_builtin tests - Rust
1859    // ==========================================================================
1860
1861    #[test]
1862    fn test_is_builtin_rust_macros() {
1863        assert!(is_builtin("println!", Language::Rust));
1864        assert!(is_builtin("print!", Language::Rust));
1865        assert!(is_builtin("eprintln!", Language::Rust));
1866        assert!(is_builtin("eprint!", Language::Rust));
1867        assert!(is_builtin("format!", Language::Rust));
1868        assert!(is_builtin("vec!", Language::Rust));
1869        assert!(is_builtin("panic!", Language::Rust));
1870        assert!(is_builtin("assert!", Language::Rust));
1871        assert!(is_builtin("assert_eq!", Language::Rust));
1872        assert!(is_builtin("assert_ne!", Language::Rust));
1873    }
1874
1875    #[test]
1876    fn test_is_builtin_rust_logging() {
1877        assert!(is_builtin("debug!", Language::Rust));
1878        assert!(is_builtin("info!", Language::Rust));
1879        assert!(is_builtin("warn!", Language::Rust));
1880        assert!(is_builtin("error!", Language::Rust));
1881        assert!(is_builtin("trace!", Language::Rust));
1882    }
1883
1884    #[test]
1885    fn test_is_builtin_rust_common_methods() {
1886        assert!(is_builtin("unwrap", Language::Rust));
1887        assert!(is_builtin("expect", Language::Rust));
1888        assert!(is_builtin("ok", Language::Rust));
1889        assert!(is_builtin("err", Language::Rust));
1890        assert!(is_builtin("some", Language::Rust));
1891        assert!(is_builtin("none", Language::Rust));
1892        assert!(is_builtin("clone", Language::Rust));
1893        assert!(is_builtin("to_string", Language::Rust));
1894        assert!(is_builtin("into", Language::Rust));
1895        assert!(is_builtin("from", Language::Rust));
1896        assert!(is_builtin("default", Language::Rust));
1897    }
1898
1899    #[test]
1900    fn test_is_builtin_rust_iterators() {
1901        assert!(is_builtin("iter", Language::Rust));
1902        assert!(is_builtin("into_iter", Language::Rust));
1903        assert!(is_builtin("collect", Language::Rust));
1904        assert!(is_builtin("map", Language::Rust));
1905        assert!(is_builtin("filter", Language::Rust));
1906    }
1907
1908    #[test]
1909    fn test_is_builtin_rust_not_builtin() {
1910        assert!(!is_builtin("my_function", Language::Rust));
1911        assert!(!is_builtin("process_data", Language::Rust));
1912    }
1913
1914    // ==========================================================================
1915    // is_builtin tests - Go
1916    // ==========================================================================
1917
1918    #[test]
1919    fn test_is_builtin_go_fmt() {
1920        assert!(is_builtin("fmt", Language::Go));
1921        assert!(is_builtin("Println", Language::Go));
1922        assert!(is_builtin("Printf", Language::Go));
1923        assert!(is_builtin("Sprintf", Language::Go));
1924        assert!(is_builtin("Errorf", Language::Go));
1925    }
1926
1927    #[test]
1928    fn test_is_builtin_go_memory() {
1929        assert!(is_builtin("make", Language::Go));
1930        assert!(is_builtin("new", Language::Go));
1931        assert!(is_builtin("len", Language::Go));
1932        assert!(is_builtin("cap", Language::Go));
1933        assert!(is_builtin("append", Language::Go));
1934        assert!(is_builtin("copy", Language::Go));
1935        assert!(is_builtin("delete", Language::Go));
1936    }
1937
1938    #[test]
1939    fn test_is_builtin_go_control() {
1940        assert!(is_builtin("close", Language::Go));
1941        assert!(is_builtin("panic", Language::Go));
1942        assert!(is_builtin("recover", Language::Go));
1943        assert!(is_builtin("print", Language::Go));
1944    }
1945
1946    #[test]
1947    fn test_is_builtin_go_not_builtin() {
1948        assert!(!is_builtin("ProcessData", Language::Go));
1949        assert!(!is_builtin("handleRequest", Language::Go));
1950    }
1951
1952    // ==========================================================================
1953    // is_builtin tests - Java
1954    // ==========================================================================
1955
1956    #[test]
1957    fn test_is_builtin_java_io() {
1958        assert!(is_builtin("println", Language::Java));
1959        assert!(is_builtin("print", Language::Java));
1960        assert!(is_builtin("printf", Language::Java));
1961    }
1962
1963    #[test]
1964    fn test_is_builtin_java_object() {
1965        assert!(is_builtin("toString", Language::Java));
1966        assert!(is_builtin("equals", Language::Java));
1967        assert!(is_builtin("hashCode", Language::Java));
1968        assert!(is_builtin("getClass", Language::Java));
1969        assert!(is_builtin("clone", Language::Java));
1970        assert!(is_builtin("notify", Language::Java));
1971        assert!(is_builtin("wait", Language::Java));
1972    }
1973
1974    #[test]
1975    fn test_is_builtin_java_collections() {
1976        assert!(is_builtin("get", Language::Java));
1977        assert!(is_builtin("set", Language::Java));
1978        assert!(is_builtin("add", Language::Java));
1979        assert!(is_builtin("remove", Language::Java));
1980        assert!(is_builtin("size", Language::Java));
1981        assert!(is_builtin("isEmpty", Language::Java));
1982        assert!(is_builtin("contains", Language::Java));
1983        assert!(is_builtin("iterator", Language::Java));
1984    }
1985
1986    #[test]
1987    fn test_is_builtin_java_not_builtin() {
1988        assert!(!is_builtin("processData", Language::Java));
1989        assert!(!is_builtin("calculateTotal", Language::Java));
1990    }
1991
1992    // ==========================================================================
1993    // is_builtin tests - C/C++
1994    // ==========================================================================
1995
1996    #[test]
1997    fn test_is_builtin_c_io() {
1998        assert!(is_builtin("printf", Language::C));
1999        assert!(is_builtin("scanf", Language::C));
2000    }
2001
2002    #[test]
2003    fn test_is_builtin_c_memory() {
2004        assert!(is_builtin("malloc", Language::C));
2005        assert!(is_builtin("free", Language::C));
2006        assert!(is_builtin("memcpy", Language::C));
2007        assert!(is_builtin("memset", Language::C));
2008    }
2009
2010    #[test]
2011    fn test_is_builtin_c_string() {
2012        assert!(is_builtin("strlen", Language::C));
2013        assert!(is_builtin("strcpy", Language::C));
2014        assert!(is_builtin("strcmp", Language::C));
2015        assert!(is_builtin("strcat", Language::C));
2016    }
2017
2018    #[test]
2019    fn test_is_builtin_cpp_streams() {
2020        assert!(is_builtin("cout", Language::Cpp));
2021        assert!(is_builtin("cin", Language::Cpp));
2022        assert!(is_builtin("endl", Language::Cpp));
2023        assert!(is_builtin("cerr", Language::Cpp));
2024        assert!(is_builtin("clog", Language::Cpp));
2025    }
2026
2027    #[test]
2028    fn test_is_builtin_c_not_builtin() {
2029        assert!(!is_builtin("process_data", Language::C));
2030        assert!(!is_builtin("custom_malloc", Language::C));
2031    }
2032
2033    // ==========================================================================
2034    // is_builtin tests - C#
2035    // ==========================================================================
2036
2037    #[test]
2038    fn test_is_builtin_csharp_console() {
2039        assert!(is_builtin("WriteLine", Language::CSharp));
2040        assert!(is_builtin("Write", Language::CSharp));
2041        assert!(is_builtin("ReadLine", Language::CSharp));
2042    }
2043
2044    #[test]
2045    fn test_is_builtin_csharp_object() {
2046        assert!(is_builtin("ToString", Language::CSharp));
2047        assert!(is_builtin("Equals", Language::CSharp));
2048        assert!(is_builtin("GetHashCode", Language::CSharp));
2049        assert!(is_builtin("GetType", Language::CSharp));
2050    }
2051
2052    #[test]
2053    fn test_is_builtin_csharp_collections() {
2054        assert!(is_builtin("Add", Language::CSharp));
2055        assert!(is_builtin("Remove", Language::CSharp));
2056        assert!(is_builtin("Contains", Language::CSharp));
2057        assert!(is_builtin("Count", Language::CSharp));
2058        assert!(is_builtin("Clear", Language::CSharp));
2059        assert!(is_builtin("ToList", Language::CSharp));
2060        assert!(is_builtin("ToArray", Language::CSharp));
2061    }
2062
2063    // ==========================================================================
2064    // is_builtin tests - Ruby
2065    // ==========================================================================
2066
2067    #[test]
2068    fn test_is_builtin_ruby_io() {
2069        assert!(is_builtin("puts", Language::Ruby));
2070        assert!(is_builtin("print", Language::Ruby));
2071        assert!(is_builtin("p", Language::Ruby));
2072        assert!(is_builtin("gets", Language::Ruby));
2073    }
2074
2075    #[test]
2076    fn test_is_builtin_ruby_enumerable() {
2077        assert!(is_builtin("each", Language::Ruby));
2078        assert!(is_builtin("map", Language::Ruby));
2079        assert!(is_builtin("select", Language::Ruby));
2080        assert!(is_builtin("reject", Language::Ruby));
2081        assert!(is_builtin("reduce", Language::Ruby));
2082        assert!(is_builtin("inject", Language::Ruby));
2083        assert!(is_builtin("find", Language::Ruby));
2084    }
2085
2086    #[test]
2087    fn test_is_builtin_ruby_predicates() {
2088        assert!(is_builtin("any?", Language::Ruby));
2089        assert!(is_builtin("all?", Language::Ruby));
2090        assert!(is_builtin("include?", Language::Ruby));
2091        assert!(is_builtin("empty?", Language::Ruby));
2092        assert!(is_builtin("nil?", Language::Ruby));
2093    }
2094
2095    // ==========================================================================
2096    // is_builtin tests - PHP
2097    // ==========================================================================
2098
2099    #[test]
2100    fn test_is_builtin_php_io() {
2101        assert!(is_builtin("echo", Language::Php));
2102        assert!(is_builtin("print", Language::Php));
2103        assert!(is_builtin("var_dump", Language::Php));
2104        assert!(is_builtin("print_r", Language::Php));
2105    }
2106
2107    #[test]
2108    fn test_is_builtin_php_checks() {
2109        assert!(is_builtin("isset", Language::Php));
2110        assert!(is_builtin("empty", Language::Php));
2111    }
2112
2113    #[test]
2114    fn test_is_builtin_php_array_string() {
2115        assert!(is_builtin("array", Language::Php));
2116        assert!(is_builtin("count", Language::Php));
2117        assert!(is_builtin("strlen", Language::Php));
2118        assert!(is_builtin("strpos", Language::Php));
2119        assert!(is_builtin("substr", Language::Php));
2120        assert!(is_builtin("explode", Language::Php));
2121        assert!(is_builtin("implode", Language::Php));
2122        assert!(is_builtin("json_encode", Language::Php));
2123        assert!(is_builtin("json_decode", Language::Php));
2124    }
2125
2126    // ==========================================================================
2127    // is_builtin tests - Kotlin
2128    // ==========================================================================
2129
2130    #[test]
2131    fn test_is_builtin_kotlin_io() {
2132        assert!(is_builtin("println", Language::Kotlin));
2133        assert!(is_builtin("print", Language::Kotlin));
2134        assert!(is_builtin("readLine", Language::Kotlin));
2135    }
2136
2137    #[test]
2138    fn test_is_builtin_kotlin_scope() {
2139        assert!(is_builtin("let", Language::Kotlin));
2140        assert!(is_builtin("also", Language::Kotlin));
2141        assert!(is_builtin("apply", Language::Kotlin));
2142        assert!(is_builtin("run", Language::Kotlin));
2143        assert!(is_builtin("with", Language::Kotlin));
2144    }
2145
2146    #[test]
2147    fn test_is_builtin_kotlin_collections() {
2148        assert!(is_builtin("listOf", Language::Kotlin));
2149        assert!(is_builtin("mapOf", Language::Kotlin));
2150        assert!(is_builtin("setOf", Language::Kotlin));
2151        assert!(is_builtin("map", Language::Kotlin));
2152        assert!(is_builtin("filter", Language::Kotlin));
2153        assert!(is_builtin("forEach", Language::Kotlin));
2154    }
2155
2156    // ==========================================================================
2157    // is_builtin tests - Swift
2158    // ==========================================================================
2159
2160    #[test]
2161    fn test_is_builtin_swift_io() {
2162        assert!(is_builtin("print", Language::Swift));
2163        assert!(is_builtin("debugPrint", Language::Swift));
2164        assert!(is_builtin("dump", Language::Swift));
2165    }
2166
2167    #[test]
2168    fn test_is_builtin_swift_functional() {
2169        assert!(is_builtin("map", Language::Swift));
2170        assert!(is_builtin("filter", Language::Swift));
2171        assert!(is_builtin("reduce", Language::Swift));
2172        assert!(is_builtin("forEach", Language::Swift));
2173    }
2174
2175    #[test]
2176    fn test_is_builtin_swift_collection() {
2177        assert!(is_builtin("contains", Language::Swift));
2178        assert!(is_builtin("count", Language::Swift));
2179        assert!(is_builtin("isEmpty", Language::Swift));
2180        assert!(is_builtin("append", Language::Swift));
2181    }
2182
2183    // ==========================================================================
2184    // is_builtin tests - Scala
2185    // ==========================================================================
2186
2187    #[test]
2188    fn test_is_builtin_scala_io() {
2189        assert!(is_builtin("println", Language::Scala));
2190        assert!(is_builtin("print", Language::Scala));
2191    }
2192
2193    #[test]
2194    fn test_is_builtin_scala_functional() {
2195        assert!(is_builtin("map", Language::Scala));
2196        assert!(is_builtin("filter", Language::Scala));
2197        assert!(is_builtin("flatMap", Language::Scala));
2198        assert!(is_builtin("foreach", Language::Scala));
2199        assert!(is_builtin("reduce", Language::Scala));
2200        assert!(is_builtin("fold", Language::Scala));
2201        assert!(is_builtin("foldLeft", Language::Scala));
2202        assert!(is_builtin("foldRight", Language::Scala));
2203        assert!(is_builtin("collect", Language::Scala));
2204    }
2205
2206    // ==========================================================================
2207    // is_builtin tests - Languages with no builtins
2208    // ==========================================================================
2209
2210    #[test]
2211    fn test_is_builtin_bash_always_false() {
2212        assert!(!is_builtin("ls", Language::Bash));
2213        assert!(!is_builtin("echo", Language::Bash));
2214        assert!(!is_builtin("grep", Language::Bash));
2215    }
2216
2217    #[test]
2218    fn test_is_builtin_haskell_always_false() {
2219        assert!(!is_builtin("putStrLn", Language::Haskell));
2220        assert!(!is_builtin("map", Language::Haskell));
2221    }
2222
2223    #[test]
2224    fn test_is_builtin_elixir_always_false() {
2225        assert!(!is_builtin("IO.puts", Language::Elixir));
2226        assert!(!is_builtin("Enum.map", Language::Elixir));
2227    }
2228
2229    #[test]
2230    fn test_is_builtin_clojure_always_false() {
2231        assert!(!is_builtin("println", Language::Clojure));
2232        assert!(!is_builtin("map", Language::Clojure));
2233    }
2234
2235    #[test]
2236    fn test_is_builtin_ocaml_always_false() {
2237        assert!(!is_builtin("print_endline", Language::OCaml));
2238        assert!(!is_builtin("List.map", Language::OCaml));
2239    }
2240
2241    #[test]
2242    fn test_is_builtin_fsharp_always_false() {
2243        assert!(!is_builtin("printfn", Language::FSharp));
2244        assert!(!is_builtin("List.map", Language::FSharp));
2245    }
2246
2247    #[test]
2248    fn test_is_builtin_lua_always_false() {
2249        assert!(!is_builtin("print", Language::Lua));
2250        assert!(!is_builtin("pairs", Language::Lua));
2251    }
2252
2253    #[test]
2254    fn test_is_builtin_r_always_false() {
2255        assert!(!is_builtin("print", Language::R));
2256        assert!(!is_builtin("cat", Language::R));
2257    }
2258
2259    // ==========================================================================
2260    // Integration tests using tree-sitter parsing
2261    // ==========================================================================
2262
2263    // Helper to parse code and get the first node of a specific kind
2264    fn parse_and_find_node(
2265        code: &str,
2266        language: Language,
2267        node_kind: &str,
2268    ) -> Option<(tree_sitter::Tree, usize)> {
2269        let mut parser = tree_sitter::Parser::new();
2270
2271        let ts_language = match language {
2272            Language::Python => tree_sitter_python::LANGUAGE,
2273            Language::Rust => tree_sitter_rust::LANGUAGE,
2274            Language::JavaScript => tree_sitter_javascript::LANGUAGE,
2275            Language::TypeScript => tree_sitter_typescript::LANGUAGE_TYPESCRIPT,
2276            Language::Go => tree_sitter_go::LANGUAGE,
2277            Language::Java => tree_sitter_java::LANGUAGE,
2278            _ => return None,
2279        };
2280
2281        parser
2282            .set_language(&ts_language.into())
2283            .expect("Error loading grammar");
2284
2285        let tree = parser.parse(code, None)?;
2286        let root = tree.root_node();
2287
2288        fn find_node_recursive(node: Node<'_>, kind: &str) -> Option<usize> {
2289            if node.kind() == kind {
2290                return Some(node.id());
2291            }
2292            for child in node.children(&mut node.walk()) {
2293                if let Some(id) = find_node_recursive(child, kind) {
2294                    return Some(id);
2295                }
2296            }
2297            None
2298        }
2299
2300        find_node_recursive(root, node_kind).map(|_| (tree, 0))
2301    }
2302
2303    // Helper to find node by kind in tree
2304    fn find_node_in_tree<'a>(node: Node<'a>, kind: &str) -> Option<Node<'a>> {
2305        if node.kind() == kind {
2306            return Some(node);
2307        }
2308        for child in node.children(&mut node.walk()) {
2309            if let Some(found) = find_node_in_tree(child, kind) {
2310                return Some(found);
2311            }
2312        }
2313        None
2314    }
2315
2316    #[test]
2317    fn test_extract_signature_python() {
2318        // Note: Python signature extraction stops at first ':' or '\n'
2319        // So type annotations in parameters are cut off at the first ':'
2320        let code = "def hello(name):\n    return f'Hello {name}'";
2321        let mut parser = tree_sitter::Parser::new();
2322        parser
2323            .set_language(&tree_sitter_python::LANGUAGE.into())
2324            .unwrap();
2325        let tree = parser.parse(code, None).unwrap();
2326        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2327
2328        let sig = extract_signature(func_node, code, Language::Python);
2329        assert!(sig.is_some());
2330        let sig = sig.unwrap();
2331        assert!(sig.contains("def hello"));
2332        assert!(sig.contains("name"));
2333    }
2334
2335    #[test]
2336    fn test_extract_signature_rust() {
2337        let code = "fn add(a: i32, b: i32) -> i32 { a + b }";
2338        let mut parser = tree_sitter::Parser::new();
2339        parser
2340            .set_language(&tree_sitter_rust::LANGUAGE.into())
2341            .unwrap();
2342        let tree = parser.parse(code, None).unwrap();
2343        let func_node = find_node_in_tree(tree.root_node(), "function_item").unwrap();
2344
2345        let sig = extract_signature(func_node, code, Language::Rust);
2346        assert!(sig.is_some());
2347        let sig = sig.unwrap();
2348        assert!(sig.contains("fn add"));
2349        assert!(sig.contains("i32"));
2350    }
2351
2352    #[test]
2353    fn test_extract_signature_javascript() {
2354        let code = "function greet(name) { return 'Hello ' + name; }";
2355        let mut parser = tree_sitter::Parser::new();
2356        parser
2357            .set_language(&tree_sitter_javascript::LANGUAGE.into())
2358            .unwrap();
2359        let tree = parser.parse(code, None).unwrap();
2360        let func_node = find_node_in_tree(tree.root_node(), "function_declaration").unwrap();
2361
2362        let sig = extract_signature(func_node, code, Language::JavaScript);
2363        assert!(sig.is_some());
2364        let sig = sig.unwrap();
2365        assert!(sig.contains("function greet"));
2366        assert!(sig.contains("name"));
2367    }
2368
2369    #[test]
2370    fn test_extract_visibility_python_public() {
2371        let code = "def public_func():\n    pass";
2372        let mut parser = tree_sitter::Parser::new();
2373        parser
2374            .set_language(&tree_sitter_python::LANGUAGE.into())
2375            .unwrap();
2376        let tree = parser.parse(code, None).unwrap();
2377        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2378
2379        let vis = extract_visibility(func_node, code, Language::Python);
2380        assert_eq!(vis, Visibility::Public);
2381    }
2382
2383    #[test]
2384    fn test_extract_visibility_python_private() {
2385        let code = "def __private_func():\n    pass";
2386        let mut parser = tree_sitter::Parser::new();
2387        parser
2388            .set_language(&tree_sitter_python::LANGUAGE.into())
2389            .unwrap();
2390        let tree = parser.parse(code, None).unwrap();
2391        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2392
2393        let vis = extract_visibility(func_node, code, Language::Python);
2394        assert_eq!(vis, Visibility::Private);
2395    }
2396
2397    #[test]
2398    fn test_extract_visibility_python_protected() {
2399        let code = "def _protected_func():\n    pass";
2400        let mut parser = tree_sitter::Parser::new();
2401        parser
2402            .set_language(&tree_sitter_python::LANGUAGE.into())
2403            .unwrap();
2404        let tree = parser.parse(code, None).unwrap();
2405        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2406
2407        let vis = extract_visibility(func_node, code, Language::Python);
2408        assert_eq!(vis, Visibility::Protected);
2409    }
2410
2411    #[test]
2412    fn test_extract_visibility_python_dunder() {
2413        // Note: Current implementation treats dunder methods as public because
2414        // the check for `starts_with("__") && !ends_with("__")` excludes them from Private,
2415        // and `starts_with('_')` is checked in an else-if, not reached for true dunders
2416        let code = "def __init__(self):\n    pass";
2417        let mut parser = tree_sitter::Parser::new();
2418        parser
2419            .set_language(&tree_sitter_python::LANGUAGE.into())
2420            .unwrap();
2421        let tree = parser.parse(code, None).unwrap();
2422        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2423
2424        let vis = extract_visibility(func_node, code, Language::Python);
2425        // __init__ starts with _ so hits the else-if branch, returning Protected
2426        // This is the actual behavior - dunder methods are treated as Protected
2427        assert_eq!(vis, Visibility::Protected);
2428    }
2429
2430    #[test]
2431    fn test_extract_visibility_rust_pub() {
2432        let code = "pub fn public_func() {}";
2433        let mut parser = tree_sitter::Parser::new();
2434        parser
2435            .set_language(&tree_sitter_rust::LANGUAGE.into())
2436            .unwrap();
2437        let tree = parser.parse(code, None).unwrap();
2438        let func_node = find_node_in_tree(tree.root_node(), "function_item").unwrap();
2439
2440        let vis = extract_visibility(func_node, code, Language::Rust);
2441        assert_eq!(vis, Visibility::Public);
2442    }
2443
2444    #[test]
2445    fn test_extract_visibility_rust_private() {
2446        let code = "fn private_func() {}";
2447        let mut parser = tree_sitter::Parser::new();
2448        parser
2449            .set_language(&tree_sitter_rust::LANGUAGE.into())
2450            .unwrap();
2451        let tree = parser.parse(code, None).unwrap();
2452        let func_node = find_node_in_tree(tree.root_node(), "function_item").unwrap();
2453
2454        let vis = extract_visibility(func_node, code, Language::Rust);
2455        assert_eq!(vis, Visibility::Private);
2456    }
2457
2458    #[test]
2459    fn test_extract_visibility_rust_pub_crate() {
2460        let code = "pub(crate) fn crate_func() {}";
2461        let mut parser = tree_sitter::Parser::new();
2462        parser
2463            .set_language(&tree_sitter_rust::LANGUAGE.into())
2464            .unwrap();
2465        let tree = parser.parse(code, None).unwrap();
2466        let func_node = find_node_in_tree(tree.root_node(), "function_item").unwrap();
2467
2468        let vis = extract_visibility(func_node, code, Language::Rust);
2469        assert_eq!(vis, Visibility::Internal);
2470    }
2471
2472    #[test]
2473    fn test_extract_visibility_go_exported() {
2474        let code = "func Exported() {}";
2475        let mut parser = tree_sitter::Parser::new();
2476        parser
2477            .set_language(&tree_sitter_go::LANGUAGE.into())
2478            .unwrap();
2479        let tree = parser.parse(code, None).unwrap();
2480        let func_node = find_node_in_tree(tree.root_node(), "function_declaration").unwrap();
2481
2482        let vis = extract_visibility(func_node, code, Language::Go);
2483        assert_eq!(vis, Visibility::Public);
2484    }
2485
2486    #[test]
2487    fn test_extract_visibility_go_unexported() {
2488        let code = "func unexported() {}";
2489        let mut parser = tree_sitter::Parser::new();
2490        parser
2491            .set_language(&tree_sitter_go::LANGUAGE.into())
2492            .unwrap();
2493        let tree = parser.parse(code, None).unwrap();
2494        let func_node = find_node_in_tree(tree.root_node(), "function_declaration").unwrap();
2495
2496        let vis = extract_visibility(func_node, code, Language::Go);
2497        assert_eq!(vis, Visibility::Private);
2498    }
2499
2500    #[test]
2501    fn test_extract_visibility_bash_always_public() {
2502        let code = "my_func() { echo hello; }";
2503        let mut parser = tree_sitter::Parser::new();
2504        parser
2505            .set_language(&tree_sitter_bash::LANGUAGE.into())
2506            .unwrap();
2507        let tree = parser.parse(code, None).unwrap();
2508        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2509
2510        let vis = extract_visibility(func_node, code, Language::Bash);
2511        assert_eq!(vis, Visibility::Public);
2512    }
2513
2514    #[test]
2515    fn test_find_body_node_python() {
2516        let code = "def foo():\n    x = 1\n    return x";
2517        let mut parser = tree_sitter::Parser::new();
2518        parser
2519            .set_language(&tree_sitter_python::LANGUAGE.into())
2520            .unwrap();
2521        let tree = parser.parse(code, None).unwrap();
2522        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2523
2524        let body = find_body_node(func_node, Language::Python);
2525        assert!(body.is_some());
2526        assert_eq!(body.unwrap().kind(), "block");
2527    }
2528
2529    #[test]
2530    fn test_find_body_node_rust() {
2531        let code = "fn foo() { let x = 1; x }";
2532        let mut parser = tree_sitter::Parser::new();
2533        parser
2534            .set_language(&tree_sitter_rust::LANGUAGE.into())
2535            .unwrap();
2536        let tree = parser.parse(code, None).unwrap();
2537        let func_node = find_node_in_tree(tree.root_node(), "function_item").unwrap();
2538
2539        let body = find_body_node(func_node, Language::Rust);
2540        assert!(body.is_some());
2541        assert_eq!(body.unwrap().kind(), "block");
2542    }
2543
2544    #[test]
2545    fn test_find_body_node_javascript() {
2546        let code = "function foo() { return 1; }";
2547        let mut parser = tree_sitter::Parser::new();
2548        parser
2549            .set_language(&tree_sitter_javascript::LANGUAGE.into())
2550            .unwrap();
2551        let tree = parser.parse(code, None).unwrap();
2552        let func_node = find_node_in_tree(tree.root_node(), "function_declaration").unwrap();
2553
2554        let body = find_body_node(func_node, Language::JavaScript);
2555        assert!(body.is_some());
2556        assert_eq!(body.unwrap().kind(), "statement_block");
2557    }
2558
2559    #[test]
2560    fn test_extract_calls_python() {
2561        let code = "def foo():\n    bar()\n    custom_func(1, 2)";
2562        let mut parser = tree_sitter::Parser::new();
2563        parser
2564            .set_language(&tree_sitter_python::LANGUAGE.into())
2565            .unwrap();
2566        let tree = parser.parse(code, None).unwrap();
2567        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2568
2569        let calls = extract_calls(func_node, code, Language::Python);
2570        assert!(calls.contains(&"bar".to_owned()));
2571        assert!(calls.contains(&"custom_func".to_owned()));
2572    }
2573
2574    #[test]
2575    fn test_extract_calls_python_filters_builtins() {
2576        let code = "def foo():\n    print('hello')\n    len([1,2,3])";
2577        let mut parser = tree_sitter::Parser::new();
2578        parser
2579            .set_language(&tree_sitter_python::LANGUAGE.into())
2580            .unwrap();
2581        let tree = parser.parse(code, None).unwrap();
2582        let func_node = find_node_in_tree(tree.root_node(), "function_definition").unwrap();
2583
2584        let calls = extract_calls(func_node, code, Language::Python);
2585        // Built-ins should be filtered out
2586        assert!(!calls.contains(&"print".to_owned()));
2587        assert!(!calls.contains(&"len".to_owned()));
2588    }
2589
2590    #[test]
2591    fn test_extract_calls_rust() {
2592        let code = "fn foo() { bar(); baz(1); }";
2593        let mut parser = tree_sitter::Parser::new();
2594        parser
2595            .set_language(&tree_sitter_rust::LANGUAGE.into())
2596            .unwrap();
2597        let tree = parser.parse(code, None).unwrap();
2598        let func_node = find_node_in_tree(tree.root_node(), "function_item").unwrap();
2599
2600        let calls = extract_calls(func_node, code, Language::Rust);
2601        assert!(calls.contains(&"bar".to_owned()));
2602        assert!(calls.contains(&"baz".to_owned()));
2603    }
2604
2605    #[test]
2606    fn test_extract_docstring_rust() {
2607        let code = "/// This is a doc comment\nfn foo() {}";
2608        let mut parser = tree_sitter::Parser::new();
2609        parser
2610            .set_language(&tree_sitter_rust::LANGUAGE.into())
2611            .unwrap();
2612        let tree = parser.parse(code, None).unwrap();
2613        let func_node = find_node_in_tree(tree.root_node(), "function_item").unwrap();
2614
2615        let docstring = extract_docstring(func_node, code, Language::Rust);
2616        assert!(docstring.is_some());
2617        assert!(docstring.unwrap().contains("This is a doc comment"));
2618    }
2619
2620    #[test]
2621    fn test_extract_docstring_rust_multiline() {
2622        let code = "/// Line 1\n/// Line 2\nfn foo() {}";
2623        let mut parser = tree_sitter::Parser::new();
2624        parser
2625            .set_language(&tree_sitter_rust::LANGUAGE.into())
2626            .unwrap();
2627        let tree = parser.parse(code, None).unwrap();
2628        let func_node = find_node_in_tree(tree.root_node(), "function_item").unwrap();
2629
2630        let docstring = extract_docstring(func_node, code, Language::Rust);
2631        assert!(docstring.is_some());
2632        let doc = docstring.unwrap();
2633        assert!(doc.contains("Line 1"));
2634        assert!(doc.contains("Line 2"));
2635    }
2636}