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//! Impact command - Show impact analysis
//!
//! Finds all callers of a function (reverse call graph traversal).
//! Supports `--type-aware` flag for Python type resolution (Phase 7-8).
//! Auto-routes through daemon when available for ~35x speedup.
use std::path::PathBuf;
use anyhow::Result;
use clap::Args;
use tldr_core::types::ImpactReport;
use tldr_core::{build_project_call_graph, impact_analysis_with_ast_fallback, Language};
use crate::commands::daemon_router::{params_with_func_depth, try_daemon_route};
use crate::output::{format_impact_text, OutputFormat, OutputWriter};
/// Analyze impact of changing a function
#[derive(Debug, Args)]
pub struct ImpactArgs {
/// Function name to analyze
pub function: String,
/// Project root directory (default: current directory)
#[arg(default_value = ".")]
pub path: PathBuf,
/// Programming language
#[arg(long, short = 'l')]
pub lang: Option<Language>,
/// Maximum traversal depth
#[arg(long, short = 'd', default_value = "5")]
pub depth: usize,
/// Filter by file path
#[arg(long)]
pub file: Option<PathBuf>,
/// Enable type-aware method resolution (resolves self.method() to ClassName.method)
#[arg(long)]
pub type_aware: bool,
}
impl ImpactArgs {
/// Run the impact command
pub fn run(&self, format: OutputFormat, quiet: bool) -> Result<()> {
let writer = OutputWriter::new(format, quiet);
// Determine language (auto-detect from directory, default to Python)
let language = self
.lang
.unwrap_or_else(|| Language::from_directory(&self.path).unwrap_or(Language::Python));
let type_aware_msg = if self.type_aware { " (type-aware)" } else { "" };
// Try daemon first for cached result
if let Some(report) = try_daemon_route::<ImpactReport>(
&self.path,
"impact",
params_with_func_depth(&self.function, Some(self.depth)),
) {
// Output based on format
if writer.is_text() {
let text = format_impact_text(&report, self.type_aware);
writer.write_text(&text)?;
return Ok(());
} else {
writer.write(&report)?;
return Ok(());
}
}
// Fallback to direct compute
writer.progress(&format!(
"Building call graph for {} ({:?}){}...",
self.path.display(),
language,
type_aware_msg
));
// Build call graph first
let graph = build_project_call_graph(&self.path, language, None, true)?;
writer.progress(&format!(
"Analyzing impact of {}{}...",
self.function, type_aware_msg
));
// Run impact analysis with AST fallback for isolated functions
// TODO: When type_aware is true, use type-aware call graph building
// For now, this flag is registered but type resolution is pending full implementation
let mut report = impact_analysis_with_ast_fallback(
&graph,
&self.function,
self.depth,
self.file.as_deref(),
&self.path,
language,
)?;
// If type-aware was requested, add placeholder stats to indicate it's enabled
// (actual type resolution is integrated in callgraph builder - Phase 8 full implementation)
if self.type_aware {
report.type_resolution = Some(tldr_core::types::TypeResolutionStats {
enabled: true,
resolved_high_confidence: 0,
resolved_medium_confidence: 0,
fallback_used: 0,
total_call_sites: 0,
});
}
// Output based on format
if writer.is_text() {
let text = format_impact_text(&report, self.type_aware);
writer.write_text(&text)?;
} else {
writer.write(&report)?;
}
Ok(())
}
}