atomcode-core 4.23.1

use anyhow::Result;
use async_trait::async_trait;
use globset::{Glob, GlobMatcher};
use ignore::WalkBuilder;
use serde::Deserialize;
use serde_json::json;

use super::{ApprovalRequirement, Tool, ToolContext, ToolDef, ToolResult};

pub struct SearchReplaceTool;

#[derive(Deserialize)]
struct SearchReplaceArgs {
    /// Search pattern (literal string by default, regex if `regex` is true)
    search: String,
    /// Replacement string (supports regex capture groups $1, $2 if regex mode)
    replace: String,
    /// File glob pattern to limit scope, e.g. "*.vue", "*.css", "*.ts" (default: all files)
    #[serde(default)]
    glob: Option<String>,
    /// Directory to search in (default: working directory)
    #[serde(default)]
    path: Option<String>,
    /// Use regex mode (default: false = literal string matching)
    #[serde(default)]
    regex: bool,
}

#[async_trait]
impl Tool for SearchReplaceTool {
    fn definition(&self) -> ToolDef {
        ToolDef {
            name: "search_replace",
            description: "Search and replace text across multiple files. Replaces ALL occurrences in ALL matching files.\n\
                When to use:\n\
                - Rename a CSS class, variable, or import across the entire project\n\
                - Change colors, sizes, or other repeated values in bulk\n\
                - Migrate API endpoints, config keys, or string literals\n\
                - Any change that affects many files with the same pattern\n\
                When NOT to use:\n\
                - Editing a single file: use edit_file instead\n\
                - Complex structural refactoring: use edit_file per file\n\
                Examples:\n\
                - Change color: {\"search\": \"bg-blue-600\", \"replace\": \"bg-violet-600\", \"glob\": \"*.vue\"}\n\
                - Rename class: {\"search\": \"rounded-2xl\", \"replace\": \"rounded-lg\", \"glob\": \"*.vue\"}\n\
                - Regex rename: {\"search\": \"bg-blue-(\\\\d+)\", \"replace\": \"bg-violet-$1\", \"glob\": \"*.vue\", \"regex\": true}".to_string(),
            parameters: json!({
                "type": "object",
                "properties": {
                    "search": { "type": "string", "description": "Text or regex pattern to find" },
                    "replace": { "type": "string", "description": "Replacement text (use $1, $2 for regex captures)" },
                    "glob": { "type": "string", "description": "File pattern to limit scope, e.g. \"*.vue\", \"*.css\" (default: all files)" },
                    "path": { "type": "string", "description": "Directory to search in (default: working directory)" },
                    "regex": { "type": "boolean", "description": "Use regex matching (default: false = literal)" }
                },
                "required": ["search", "replace"]
            }),
        }
    }

    fn validate_args(&self, args: &str) -> std::result::Result<(), String> {
        serde_json::from_str::<SearchReplaceArgs>(args)
            .map(|_| ())
            .map_err(|e| format!(
                "{} (could not parse search_replace arguments; check `search` and `replace` are present)",
                e
            ))
    }

    fn approval(&self, _args: &str) -> ApprovalRequirement {
        // Bulk replacement across files is potentially destructive
        // Auto-approve: search_replace is safe (literal/regex matching, respects .gitignore).
        // Requiring approval caused the model to avoid it and use 30+ edit_file calls instead.
        ApprovalRequirement::AutoApprove
    }

    fn approval_with_context(&self, args: &str, ctx: &ToolContext) -> ApprovalRequirement {
        let parsed = match serde_json::from_str::<SearchReplaceArgs>(args) {
            Ok(parsed) => parsed,
            Err(_) => return self.approval(args),
        };
        let working_dir = match ctx.working_dir.try_read() {
            Ok(wd) => wd.clone(),
            Err(_) => return self.approval(args),
        };
        let raw_path = parsed.path.as_deref().unwrap_or(".");
        match super::approval_for_path(raw_path, &working_dir, super::ExternalPathAction::Write) {
            Ok(approval) => approval,
            Err(_) => self.approval(args),
        }
    }

    async fn execute(&self, args: &str, ctx: &ToolContext) -> Result<ToolResult> {
        let parsed: SearchReplaceArgs = serde_json::from_str(args)?;
        let wd = ctx.working_dir.read().await.clone();
        let search_dir =
            match super::inspect_path_access(parsed.path.as_deref().unwrap_or("."), &wd) {
                Ok(access) => access.path,
                Err(err) => {
                    return Ok(ToolResult {
                        call_id: String::new(),
                        output: err.to_string(),
                        success: false,
                    });
                }
            };

        if !search_dir.exists() {
            return Ok(ToolResult {
                call_id: String::new(),
                output: format!("Directory not found: {}", search_dir.display()),
                success: false,
            });
        }

        // Build regex or literal matcher
        let re = if parsed.regex {
            match regex::Regex::new(&parsed.search) {
                Ok(r) => r,
                Err(e) => {
                    return Ok(ToolResult {
                        call_id: String::new(),
                        output: format!("Invalid regex '{}': {}", parsed.search, e),
                        success: false,
                    });
                }
            }
        } else {
            // Escape the literal string to use as regex
            regex::Regex::new(&regex::escape(&parsed.search)).unwrap()
        };

        let glob_filter = match parsed.glob.as_deref() {
            Some(pattern) => match FileGlob::new(pattern) {
                Ok(filter) => Some(filter),
                Err(e) => {
                    return Ok(ToolResult {
                        call_id: String::new(),
                        output: format!("Invalid glob '{}': {}", pattern, e),
                        success: false,
                    });
                }
            },
            None => None,
        };

        // Walk files
        let mut walker = WalkBuilder::new(&search_dir);
        walker.hidden(true).git_ignore(true);
        let walk = walker.build();

        let mut total_replacements = 0usize;
        let mut files_modified = Vec::new();
        let mut files_scanned = 0usize;

        for entry in walk {
            let entry = match entry {
                Ok(e) => e,
                Err(_) => continue,
            };

            if !entry.file_type().map_or(false, |ft| ft.is_file()) {
                continue;
            }

            let file_path = entry.path();

            if let Some(ref filter) = glob_filter {
                if !filter.is_match(file_path, &search_dir) {
                    continue;
                }
            }

            // Read file
            let content = match std::fs::read_to_string(file_path) {
                Ok(c) => c,
                Err(_) => continue, // skip binary/unreadable files
            };

            files_scanned += 1;

            // Quick check: does the file contain the search pattern?
            if !re.is_match(&content) {
                continue;
            }

            // Count and replace
            let count = re.find_iter(&content).count();
            let new_content = re
                .replace_all(&content, parsed.replace.as_str())
                .to_string();

            if new_content != content {
                // Backup before write
                ctx.file_history
                    .lock()
                    .await
                    .backup_before_write(&file_path.to_string_lossy())
                    .await;
                // Write back
                if let Err(e) = std::fs::write(file_path, &new_content) {
                    return Ok(ToolResult {
                        call_id: String::new(),
                        output: format!("Failed to write {}: {}", file_path.display(), e),
                        success: false,
                    });
                }
                // Canonicalize once so downstream by-path lookups
                // (FileStore, LSP) match what read.rs originally
                // stored — `entry.path()` from the directory walk
                // can be the un-resolved symlink form (e.g. macOS
                // `/var/...` vs `/private/var/...`), which would
                // miss the FileStore key inserted by read_file.
                let canon = std::fs::canonicalize(file_path)
                    .unwrap_or_else(|_| file_path.to_path_buf());
                // Notify LSP that file changed (if LSP is enabled).
                ctx.notify_lsp_file_changed(&canon, &new_content).await;
                // D3: drop any FileStore entry — peek_file against an
                // old store_id reports stale, forcing fresh read_file.
                ctx.file_store.write().await.invalidate(&canon);
                total_replacements += count;
                files_modified.push(format!(
                    "  {} ({} replacements)",
                    file_path.display(),
                    count
                ));
            }
        }

        if files_modified.is_empty() {
            return Ok(ToolResult {
                call_id: String::new(),
                output: format!(
                    "No matches found for '{}' in {} ({} files scanned)",
                    parsed.search,
                    search_dir.display(),
                    files_scanned,
                ),
                success: false,
            });
        }

        let output = format!(
            "Replaced '{}' → '{}': {} replacements across {} files.\n{}",
            parsed.search,
            parsed.replace,
            total_replacements,
            files_modified.len(),
            files_modified.join("\n"),
        );

        Ok(ToolResult {
            call_id: String::new(),
            output,
            success: true,
        })
    }
}

struct FileGlob {
    pattern_has_path: bool,
    matcher: GlobMatcher,
}

impl FileGlob {
    fn new(pattern: &str) -> std::result::Result<Self, globset::Error> {
        let normalized = pattern.replace('\\', "/");
        Ok(Self {
            pattern_has_path: normalized.contains('/'),
            matcher: Glob::new(&normalized)?.compile_matcher(),
        })
    }

    fn is_match(&self, file_path: &std::path::Path, search_dir: &std::path::Path) -> bool {
        let candidate = if self.pattern_has_path {
            file_path.strip_prefix(search_dir).unwrap_or(file_path)
        } else {
            match file_path.file_name().and_then(|name| name.to_str()) {
                Some(name) => return self.matcher.is_match(name),
                None => return false,
            }
        };

        let normalized = candidate.to_string_lossy().replace('\\', "/");
        self.matcher.is_match(normalized)
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::tool::{Tool, ToolContext};
    use tempfile::TempDir;

    #[tokio::test]
    async fn search_replace_path_glob_matches_relative_paths() {
        let dir = TempDir::new().unwrap();
        std::fs::create_dir_all(dir.path().join("src")).unwrap();
        std::fs::create_dir_all(dir.path().join("tests")).unwrap();
        std::fs::write(dir.path().join("src/app.ts"), "const v = 'needle';\n").unwrap();
        std::fs::write(dir.path().join("tests/app.ts"), "const v = 'needle';\n").unwrap();

        let ctx = ToolContext::new(dir.path().to_path_buf());
        let args = r#"{"search":"needle","replace":"replaced","glob":"src/**/*.ts"}"#;
        let result = SearchReplaceTool.execute(args, &ctx).await.unwrap();

        assert!(result.success, "{}", result.output);
        assert_eq!(
            std::fs::read_to_string(dir.path().join("src/app.ts")).unwrap(),
            "const v = 'replaced';\n"
        );
        assert_eq!(
            std::fs::read_to_string(dir.path().join("tests/app.ts")).unwrap(),
            "const v = 'needle';\n"
        );
    }

    #[tokio::test]
    async fn search_replace_filename_glob_still_matches_nested_files() {
        let dir = TempDir::new().unwrap();
        std::fs::create_dir_all(dir.path().join("src")).unwrap();
        std::fs::write(dir.path().join("src/app.ts"), "const v = 'needle';\n").unwrap();
        std::fs::write(dir.path().join("src/app.md"), "needle\n").unwrap();

        let ctx = ToolContext::new(dir.path().to_path_buf());
        let args = r#"{"search":"needle","replace":"replaced","glob":"*.ts"}"#;
        let result = SearchReplaceTool.execute(args, &ctx).await.unwrap();

        assert!(result.success, "{}", result.output);
        assert_eq!(
            std::fs::read_to_string(dir.path().join("src/app.ts")).unwrap(),
            "const v = 'replaced';\n"
        );
        assert_eq!(
            std::fs::read_to_string(dir.path().join("src/app.md")).unwrap(),
            "needle\n"
        );
    }
}