use bitcoin::secp256k1::{rand, Keypair, Secp256k1, SecretKey};
use std::{
    fs::{self, File},
    io::Write,
    path::PathBuf,
    str::FromStr,
};

pub fn make_keypair() -> bitcoin::secp256k1::Keypair {
    let secp = Secp256k1::new();
    let (secret_key, _) = secp.generate_keypair(&mut rand::thread_rng());
    Keypair::from_secret_key(&secp, &secret_key)
}

pub(crate) fn write(key_path: &PathBuf) -> Result<(), std::io::Error> {
    let key_pair = make_keypair();
    let mut file = File::create(key_path)?;

    let pub_str = key_pair.public_key().to_string();
    let priv_str = key_pair.display_secret().to_string();
    println!("private key: {priv_str}");
    let out = format!("{pub_str}/{priv_str}");
    println!("out: {out}");
    file.write(out.as_bytes())?;

    Ok(())
}

pub(crate) fn load_from_file(side_dir: &PathBuf) -> bitcoin::secp256k1::Keypair {
    let bitcoin_key_path = crate::utils::side_paths(side_dir.clone()).1; // TODO: this tuple stinks

    let data = fs::read_to_string(bitcoin_key_path).expect("couldn't read bitcoin key file");
    println!("bitcoin keys: {:?}", data);

    let secret_key_data = data.split("/").collect::<Vec<&str>>()[1];
    let secp = Secp256k1::new();
    let secret_key =
        SecretKey::from_str(secret_key_data).expect("couldn't load secret key from file");
    Keypair::from_secret_key(&secp, &secret_key)
}