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//  * This file is part of the uutils coreutils package.
//  *
//  * (c) Nicholas Juszczak <juszczakn@gmail.com>
//  *
//  * For the full copyright and license information, please view the LICENSE
//  * file that was distributed with this source code.

extern crate getopts;

#[macro_use]
extern crate uucore;

use std::fs;
use std::path::Path;

static NAME: &str = "mkdir";
static VERSION: &str = env!("CARGO_PKG_VERSION");

/**
 * Handles option parsing
 */
pub fn uumain(args: Vec<String>) -> i32 {
    let mut opts = getopts::Options::new();

    // Linux-specific options, not implemented
    // opts.optflag("Z", "context", "set SELinux security context" +
    // " of each created directory to CTX"),
    opts.optopt("m", "mode", "set file mode", "755");
    opts.optflag("p", "parents", "make parent directories as needed");
    opts.optflag("v", "verbose", "print a message for each printed directory");
    opts.optflag("h", "help", "display this help");
    opts.optflag("V", "version", "display this version");

    let matches = match opts.parse(&args[1..]) {
        Ok(m) => m,
        Err(f) => crash!(1, "Invalid options\n{}", f),
    };

    if args.len() == 1 || matches.opt_present("help") {
        print_help(&opts);
        return 0;
    }
    if matches.opt_present("version") {
        println!("{} {}", NAME, VERSION);
        return 0;
    }
    let verbose = matches.opt_present("verbose");
    let recursive = matches.opt_present("parents");

    // Translate a ~str in octal form to u16, default to 755
    // Not tested on Windows
    let mode_match = matches.opts_str(&["mode".to_owned()]);
    let mode: u16 = match mode_match {
        Some(m) => {
            let res: Option<u16> = u16::from_str_radix(&m, 8).ok();
            match res {
                Some(r) => r,
                _ => crash!(1, "no mode given"),
            }
        }
        _ => 0o755 as u16,
    };

    let dirs = matches.free;
    if dirs.is_empty() {
        crash!(1, "missing operand");
    }
    exec(dirs, recursive, mode, verbose)
}

fn print_help(opts: &getopts::Options) {
    println!("{} {}", NAME, VERSION);
    println!();
    println!("Usage:");
    print!(
        "{}",
        opts.usage("Create the given DIRECTORY(ies) if they do not exist")
    );
}

/**
 * Create the list of new directories
 */
fn exec(dirs: Vec<String>, recursive: bool, mode: u16, verbose: bool) -> i32 {
    let mut status = 0;
    let empty = Path::new("");
    for dir in &dirs {
        let path = Path::new(dir);
        if !recursive {
            if let Some(parent) = path.parent() {
                if parent != empty && !parent.exists() {
                    show_info!(
                        "cannot create directory '{}': No such file or directory",
                        path.display()
                    );
                    status = 1;
                    continue;
                }
            }
        }
        status |= mkdir(path, recursive, mode, verbose);
    }
    status
}

/**
 * Wrapper to catch errors, return 1 if failed
 */
fn mkdir(path: &Path, recursive: bool, mode: u16, verbose: bool) -> i32 {
    let create_dir = if recursive {
        fs::create_dir_all
    } else {
        fs::create_dir
    };
    if let Err(e) = create_dir(path) {
        show_info!("{}: {}", path.display(), e.to_string());
        return 1;
    }

    if verbose {
        show_info!("created directory '{}'", path.display());
    }

    #[cfg(any(unix, target_os = "redox"))]
    fn chmod(path: &Path, mode: u16) -> i32 {
        use std::fs::{set_permissions, Permissions};
        use std::os::unix::fs::PermissionsExt;

        let mode = Permissions::from_mode(u32::from(mode));

        if let Err(err) = set_permissions(path, mode) {
            show_error!("{}: {}", path.display(), err);
            return 1;
        }
        0
    }
    #[cfg(windows)]
    #[allow(unused_variables)]
    fn chmod(path: &Path, mode: u16) -> i32 {
        // chmod on Windows only sets the readonly flag, which isn't even honored on directories
        0
    }
    chmod(path, mode)
}