extern crate redoxfs;
extern crate uuid;

use std::io::Read;
use std::{env, fs, process, time};

use redoxfs::{DiskFile, FileSystem};
use uuid::Uuid;

fn main() {
    let mut args = env::args().skip(1);

    let disk_path = if let Some(path) = args.next() {
        path
    } else {
        println!("redoxfs-mkfs: no disk image provided");
        println!("redoxfs-mkfs DISK [BOOTLOADER]");
        process::exit(1);
    };

    let bootloader_path_opt = args.next();

    let disk = match DiskFile::open(&disk_path) {
        Ok(disk) => disk,
        Err(err) => {
            println!("redoxfs-mkfs: failed to open image {}: {}", disk_path, err);
            process::exit(1);
        }
    };

    let mut bootloader = vec![];
    if let Some(bootloader_path) = bootloader_path_opt {
        match fs::File::open(&bootloader_path) {
            Ok(mut file) => match file.read_to_end(&mut bootloader) {
                Ok(_) => (),
                Err(err) => {
                    println!(
                        "redoxfs-mkfs: failed to read bootloader {}: {}",
                        bootloader_path, err
                    );
                    process::exit(1);
                }
            },
            Err(err) => {
                println!(
                    "redoxfs-mkfs: failed to open bootloader {}: {}",
                    bootloader_path, err
                );
                process::exit(1);
            }
        }
    };

    let ctime = time::SystemTime::now()
        .duration_since(time::UNIX_EPOCH)
        .unwrap();
    match FileSystem::create_reserved(disk, &bootloader, ctime.as_secs(), ctime.subsec_nanos()) {
        Ok(filesystem) => {
            let uuid = Uuid::from_bytes(&filesystem.header.1.uuid).unwrap();
            println!(
                "redoxfs-mkfs: created filesystem on {}, reserved {} blocks, size {} MB, uuid {}",
                disk_path,
                filesystem.block,
                filesystem.header.1.size / 1000 / 1000,
                uuid.hyphenated()
            );
        }
        Err(err) => {
            println!(
                "redoxfs-mkfs: failed to create filesystem on {}: {}",
                disk_path, err
            );
            process::exit(1);
        }
    }
}