//! agent-manager — a CLI to manage local AI coding agents.
//!
//! The crate is organised around a few core concepts:
//!
//! * cli        — clap definitions for the am command line interface.
//! * config     — YAML schema, loading, validation, includes, path expansion.
//! * catalog    — the merged agent catalog (embedded defaults + user config).
//! * state      — the local installation database (JSON file).
//! * process    — background/foreground process management (PID bookkeeping).
//! * installers — one installer per method (npm, pip, cargo, go, bun, curl,
//!                binary, git).
//! * commands   — one module per CLI command.

pub mod app;
pub mod catalog;
pub mod cli;
pub mod commands;
pub mod config;
pub mod deps;
pub mod doctor;
pub mod download;
pub mod installers;
pub mod nav;
pub mod output;
pub mod probe;
pub mod process;
pub mod repl;
pub mod runner;
pub mod shell;
pub mod state;
pub mod toolchain;
pub mod version;

use clap::Parser;

/// CLI entry point used by the am binary. Returns the process exit code.
pub fn main_entry() -> i32 {
    let cli = cli::Cli::parse();
    match app::App::from_cli(cli) {
        Ok(app) => match commands::execute(&app) {
            Ok(code) => code,
            Err(err) => {
                if app.json() {
                    let payload = serde_json::json!({
                        "error": format!("{:#}", err),
                    });
                    let _ = serde_json::to_writer_pretty(std::io::stdout(), &payload);
                    let _ = writeln!(std::io::stdout());
                } else {
                    eprintln!("{} {}", "error:".red().bold(), format!("{:#}", err));
                }
                1
            }
        },
        Err(err) => {
            // Config could not even be loaded: fall back to plain stderr output.
            eprintln!("{} {}", "error:".red().bold(), format!("{:#}", err));
            1
        }
    }
}

#[allow(unused_imports)]
use colored::Colorize;
use std::io::Write;