use std::io::prelude::*;
use std::fs::File;

use rand::Rng;
use serialize::base64::FromBase64;
use serialize::hex::FromHex;

pub fn read_as_hex_lines (filename: &str) -> Vec<Vec<u8>> {
    let fh = File::open(filename).unwrap();
    return ::std::io::BufStream::new(fh)
        .lines()
        .map(|line| line.unwrap().from_hex().unwrap())
        .collect();
}

pub fn read_as_base64_lines (filename: &str) -> Vec<Vec<u8>> {
    let fh = File::open(filename).unwrap();
    return ::std::io::BufStream::new(fh)
        .lines()
        .map(|line| line.unwrap().from_base64().unwrap())
        .collect();
}

pub fn read_as_lines (filename: &str) -> Vec<Vec<u8>> {
    let fh = File::open(filename).unwrap();
    return ::std::io::BufStream::new(fh)
        .lines()
        .map(|line| line.unwrap().as_bytes().to_vec())
        .collect();
}

pub fn read_as_base64 (filename: &str) -> Vec<u8> {
    let fh = File::open(filename).unwrap();
    return ::std::io::BufStream::new(fh)
        .lines()
        .map(|line| line.unwrap().from_base64().unwrap())
        .collect::<Vec<Vec<u8>>>()
        .concat();
}

pub fn read (filename: &str) -> Vec<u8> {
    let outfh = File::open(filename).unwrap();
    return outfh.bytes().map(|c| c.unwrap()).collect();
}

pub fn random_aes_128_key () -> [u8; 16] {
    let mut key = [0; 16];
    ::rand::thread_rng().fill_bytes(&mut key);
    return key;
}

pub fn coinflip () -> bool {
    ::rand::thread_rng().gen()
}