use std::path::PathBuf;

use anyhow::{Result, bail};

use crate::cmd::cryptsetup;
use crate::config;

pub fn decrypt_backup(pools: &config::BackupPools) -> Result<(String, String)> {
    let mut pathbuf = PathBuf::new();
    let mut found = false;

    let mut the_name = String::new();
    let mut the_crypt_device = String::new();

    for (device, name) in [&pools.backup1, &pools.backup2]
        .iter()
        .zip(["backup1", "backup2"])
    {
        pathbuf.push("/dev/disk/by-uuid/");
        pathbuf.push(device);

        if pathbuf.exists() {
            found = true;
            the_name = name.to_string();

            the_crypt_device.push_str("crypt-");
            the_crypt_device.push_str(name); // content is then e.g. "crypt-backup1"

            println!("found backup disk {name}, will decrypt to {the_crypt_device}");
            break;
        }
    }

    if found {
        cryptsetup::open(&pathbuf, &the_crypt_device)?;
        Ok((the_name, the_crypt_device))
    } else {
        bail!("no backup disk found")
    }
}

pub fn encrypt_backup(crypt_device: String) -> Result<()> {
    println!("encrypting {crypt_device}");
    cryptsetup::close(&crypt_device)
}