use crate::prelude::*;

pub fn path(path: &std::path::Path) -> String {
    let mut path = path.display().to_string();
    if let Ok(home) = std::env::var("HOME") {
        if path.starts_with(&home) {
            path.replace_range(..home.len(), "~");
        }
    }
    path
}

pub fn exit_status(status: std::process::ExitStatus) -> String {
    status.signal().map_or_else(
        || format!("{:03}  ", status.code().unwrap()),
        |sig| {
            nix::sys::signal::Signal::try_from(sig).map_or_else(
                |_| format!("SIG{} ", sig),
                |sig| format!("{:4} ", &sig.as_str()[3..]),
            )
        },
    )
}

pub fn time(time: time::OffsetDateTime) -> String {
    let format = if time::OffsetDateTime::now_utc() - time
        > std::time::Duration::from_secs(60 * 60 * 24)
    {
        time::format_description::parse(
            "[year]-[month]-[day] [hour]:[minute]:[second]",
        )
        .unwrap()
    } else {
        time::format_description::parse("[hour]:[minute]:[second]").unwrap()
    };
    time.format(&format).unwrap()
}

pub fn duration(dur: std::time::Duration) -> String {
    let secs = dur.as_secs();
    let nanos = dur.subsec_nanos();
    if secs > 60 {
        let mins = secs / 60;
        let secs = secs - mins * 60;
        format!("{}m{}s", mins, secs)
    } else if secs > 9 {
        format!("{}.{:02}s", secs, nanos / 10_000_000)
    } else if secs > 0 {
        format!("{}.{:03}s", secs, nanos / 1_000_000)
    } else if nanos >= 1_000_000 {
        format!("{}ms", nanos / 1_000_000)
    } else if nanos >= 1_000 {
        format!("{}us", nanos / 1_000)
    } else {
        format!("{}ns", nanos)
    }
}

pub fn io_error(e: &std::io::Error) -> String {
    let mut s = format!("{}", e);
    if e.raw_os_error().is_some() {
        let i = s.rfind('(').unwrap();
        s.truncate(i - 1);
    }
    s
}