//! Improve command implementation.
//!
//! Generates improve.csv — owned cars not yet in a final configuration,
//! sorted by number of best tracks (descending).

use top_drives::AppError;

use crate::commands::{load_my_cars_or_warn, run_analysis};
use crate::output::write_improve_csv;

/// Executes the improve command: generates improve.csv.
pub async fn run_improve(
    my_cars_path: &str,
    cars_db_path: &str,
    times_dir: &str,
    output_dir: &str,
) -> Result<(), AppError> {
    let my_data = load_my_cars_or_warn(my_cars_path)?;
    let (_ctx, counts) = run_analysis(my_data, cars_db_path, times_dir).await?;
    let count = write_improve_csv(output_dir, &counts)?;
    if count == 0 {
        println!("No cars to improve — all owned cars are already in final or maxed configs.");
    } else {
        println!("Written: improve.csv ({count} cars to improve)");
    }
    Ok(())
}