extern crate redoxfs;
extern crate syscall;
extern crate uuid;

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

use redoxfs::{archive, DiskSparse, FileSystem};
use uuid::Uuid;

fn main() {
    env_logger::init();

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

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

    let folder_path = if let Some(path) = args.next() {
        path
    } else {
        println!("redoxfs-ar: no folder provided");
        println!("redoxfs-ar DISK FOLDER [BOOTLOADER]");
        process::exit(1);
    };

    let bootloader_path_opt = args.next();

    let disk = match DiskSparse::create(&disk_path, 1024 * 1024 * 1024 /*TODO: make argument*/) {
        Ok(disk) => disk,
        Err(err) => {
            println!("redoxfs-ar: 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-ar: failed to read bootloader {}: {}",
                        bootloader_path, err
                    );
                    process::exit(1);
                }
            },
            Err(err) => {
                println!(
                    "redoxfs-ar: failed to open bootloader {}: {}",
                    bootloader_path, err
                );
                process::exit(1);
            }
        }
    };

    let ctime = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
    match FileSystem::create_reserved(
        disk,
        None,
        &bootloader,
        ctime.as_secs(),
        ctime.subsec_nanos(),
    ) {
        Ok(mut fs) => {
            let size = match archive(&mut fs, &folder_path) {
                Ok(ok) => ok,
                Err(err) => {
                    println!("redoxfs-ar: failed to archive {}: {}", folder_path, err);
                    process::exit(1);
                }
            };

            if let Err(err) = fs.disk.file.set_len(size) {
                println!(
                    "redoxfs-ar: failed to truncate {} to {}: {}",
                    disk_path, size, err
                );
                process::exit(1);
            }

            let uuid = Uuid::from_bytes(&fs.header.uuid()).unwrap();
            println!(
                "redoxfs-ar: created filesystem on {}, reserved {} blocks, size {} MB, uuid {}",
                disk_path,
                fs.block,
                fs.header.size() / 1000 / 1000,
                uuid.hyphenated()
            );
        }
        Err(err) => {
            println!(
                "redoxfs-ar: failed to create filesystem on {}: {}",
                disk_path, err
            );
            process::exit(1);
        }
    };
}