use nix_compat::store_path::compress_hash;
use sha2::{Digest as _, Sha256};

pub fn sha256_hex(data: &[u8]) -> String {
    let mut hasher = Sha256::new();
    hasher.update(data);
    hex::encode(hasher.finalize())
}

pub fn make_store_path(store_dir: &str, ty: &str, hash_hex: &str, name: &str) -> String {
    let s = format!("{}:sha256:{}:{}:{}", ty, hash_hex, store_dir, name);

    let mut hasher = Sha256::new();
    hasher.update(s.as_bytes());
    let hash: [u8; 32] = hasher.finalize().into();

    let compressed = compress_hash::<20>(&hash);
    let encoded = nix_compat::nixbase32::encode(&compressed);

    format!("{}/{}-{}", store_dir, encoded, name)
}