#![crate_id(name="uutils", vers="1.0.0", author="Michael Gehring")]

/*
 * This file is part of the uutils coreutils package.
 *
 * (c) Michael Gehring <mg@ebfe.org>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

extern crate getopts;

@CRATES@

use std::os;
use std::collections::hashmap::HashMap;

static NAME: &'static str = "uutils";
static VERSION: &'static str = "1.0.0";

fn util_map() -> HashMap<&'static str, fn(Vec<String>) -> int> {
    fn uutrue(_: Vec<String>) -> int { 0 }
    fn uufalse(_: Vec<String>) -> int { 1 }

    let mut map = HashMap::new();
    @UTIL_MAP@
    map
}

fn usage(cmap: &HashMap<&'static str, fn(Vec<String>) -> int>) {
    println!("{} {}", NAME, VERSION);
    println!("");
    println!("Usage:");
    println!("  {} [util [arguments...]", NAME);
    println!("Currently defined functions:");
    let mut utils: Vec<&str> = cmap.keys().map(|&s| s).collect();
    utils.sort();
    for util in utils.iter() {
        println!("\t{}", util);
    }
    println!("");
}

fn main() {
    let umap = util_map();
    let mut args = os::args();

    // try binary name as util name.
    let binary = Path::new(args.get(0).as_slice());
    let binary_as_util = binary.filename_str().unwrap();

    match umap.find_equiv(&binary_as_util) {
        Some(&uumain) => {
            os::set_exit_status(uumain(args));
            return
        }
        None => (),
    }

    if binary_as_util.starts_with("uutils")
        || binary_as_util.starts_with("busybox") {
            // uutils can be called as either "uutils", "busybox"
            // "uutils-suffix" or "busybox-suffix". Not sure
            // what busybox uses the -suffix pattern for.
    } else {
        println!("{}: applet not found", binary_as_util);
        os::set_exit_status(1);
        return
    }

    // try first arg as util name.
    if args.len() >= 2 {
        args.shift();
        let util = args.get(0).as_slice();

        match umap.find_equiv(&util) {
            Some(&uumain) => {
                os::set_exit_status(uumain(args.clone()));
                return
            }
            None => {
                if args.get(0).as_slice() == "--help" {
                    // see if they want help on a specific util
                    if args.len() >= 2 {
                        let util = args.get(1).as_slice();
                        match umap.find_equiv(&util) {
                            Some(&uumain) => {
                                os::set_exit_status(uumain(vec![util.to_string(), "--help".to_string()]));
                                return
                            }
                            None => {
                                println!("{}: applet not found", util);
                                os::set_exit_status(1);
                                return
                            }
                        }
                    }
                    usage(&umap);
                    os::set_exit_status(0);
                    return
                } else {
                    println!("{}: applet not found", util);
                    os::set_exit_status(1);
                    return
                }
            }
        }
    } else {
        // no arguments provided
        usage(&umap);
        os::set_exit_status(0);
        return
    }
}