//! Tools and utilities
//!
//! This is a collection of small and useful tools.

use anyhow::{bail, Error};

use proxmox_http::{client::Client, HttpOptions, ProxyConfig};

pub mod config;
pub mod disks;
pub mod fs;

mod shared_rate_limiter;
pub use shared_rate_limiter::SharedRateLimiter;

pub mod statistics;
pub mod systemd;
pub mod ticket;

pub mod parallel_handler;

pub fn assert_if_modified(digest1: &str, digest2: &str) -> Result<(), Error> {
    if digest1 != digest2 {
        bail!("detected modified configuration - file changed by other user? Try again.");
    }
    Ok(())
}

/// Detect modified configuration files
///
/// This function fails with a reasonable error message if checksums do not match.
pub fn detect_modified_configuration_file(
    digest1: &[u8; 32],
    digest2: &[u8; 32],
) -> Result<(), Error> {
    if digest1 != digest2 {
        bail!("detected modified configuration - file changed by other user? Try again.");
    }
    Ok(())
}

/// The default 2 hours are far too long for PBS
pub const PROXMOX_BACKUP_TCP_KEEPALIVE_TIME: u32 = 120;
pub const DEFAULT_USER_AGENT_STRING: &str = "proxmox-backup-client/1.0";

/// Returns a new instance of [`Client`] configured for PBS usage.
pub fn pbs_simple_http(proxy_config: Option<ProxyConfig>) -> Client {
    let options = HttpOptions {
        proxy_config,
        user_agent: Some(DEFAULT_USER_AGENT_STRING.to_string()),
        tcp_keepalive: Some(PROXMOX_BACKUP_TCP_KEEPALIVE_TIME),
    };

    Client::with_options(options)
}

pub fn setup_safe_path_env() {
    std::env::set_var("PATH", "/sbin:/bin:/usr/sbin:/usr/bin");
    // Make %ENV safer - as suggested by https://perldoc.perl.org/perlsec.html
    for name in &["IFS", "CDPATH", "ENV", "BASH_ENV"] {
        std::env::remove_var(name);
    }
}