communique 1.2.3

use std::path::Path;

use serde_json::json;
use xx::process;

use crate::error::Result;
use crate::llm::ToolDefinition;

pub fn definition() -> ToolDefinition {
    ToolDefinition {
        name: "list_files".into(),
        description:
            "List files tracked by git in the repository. Optionally filter by a glob pattern."
                .into(),
        input_schema: json!({
            "type": "object",
            "properties": {
                "pattern": {
                    "type": "string",
                    "description": "Optional glob pattern to filter files (e.g. 'src/**/*.rs')"
                }
            }
        }),
    }
}

pub fn execute(repo_root: &Path, input: &serde_json::Value) -> Result<String> {
    let mut cmd = process::cmd("git", ["ls-files"]).cwd(repo_root);

    if let Some(pattern) = input.get("pattern").and_then(|v| v.as_str()) {
        cmd = cmd.args(["--", pattern]);
    }

    Ok(cmd.read()?)
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::test_helpers::TempRepo;
    use serde_json::json;

    #[test]
    fn test_list_files() {
        let repo = TempRepo::new();
        repo.write_file("src/main.rs", "fn main() {}");
        repo.write_file("README.md", "# Hello");
        repo.commit("init");

        let result = execute(repo.path(), &json!({})).unwrap();
        assert!(result.contains("README.md"));
        assert!(result.contains("src/main.rs"));
    }

    #[test]
    fn test_list_files_with_pattern() {
        let repo = TempRepo::new();
        repo.write_file("src/main.rs", "fn main() {}");
        repo.write_file("README.md", "# Hello");
        repo.commit("init");

        let result = execute(repo.path(), &json!({"pattern": "*.rs"})).unwrap();
        assert!(result.contains("main.rs"));
        assert!(!result.contains("README.md"));
    }
}