#![no_main]
#![no_std]

use core::time::Duration;
use log::info;
use uefi::print;
use uefi::prelude::*;
use uefi::Result;
use uefi::Status;
use uefi::CString16;
use uefi::fs::{FileSystem, FileSystemResult};
use uefi::proto::media::fs::SimpleFileSystem;
use uefi::boot::{self, ScopedProtocol};

extern crate alloc;
use alloc::vec::Vec;

#[entry]
fn main() -> Status {
    uefi::helpers::init().unwrap();
    info!("Hello from bootloader!");
    load_kernel().unwrap();
    info!("Entry fuction regained control!");
    boot::stall(Duration::from_secs(10));
    info!("exiting!");
    Status::SUCCESS
}

fn load_kernel() -> Result {
    info!("Entered load_kernel function");
    let kernel = read_file(r"\EFI\BOOT\kernel.elf").unwrap();
    info!("Read kernel into memory!");
    print!("{:x?}", kernel[..10].to_vec());
    info!("I printed my dump");
    return Ok(());
}

fn read_file(path: &str) -> FileSystemResult<Vec<u8>> {
    let path: CString16 = CString16::try_from(path).unwrap();
    let fs: ScopedProtocol<SimpleFileSystem> = boot::get_image_file_system(boot::image_handle()).unwrap();
    let mut fs = FileSystem::new(fs);
    fs.read(path.as_ref())
}