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use std::fmt;
use std::time::Duration;

pub use self::canonical_url::CanonicalUrl;
pub use self::config::{homedir, Config, ConfigValue};
pub(crate) use self::counter::MetricsCounter;
pub use self::dependency_queue::DependencyQueue;
pub use self::diagnostic_server::RustfixDiagnosticServer;
pub use self::errors::{internal, CargoResult, CliResult, Test};
pub use self::errors::{CargoTestError, CliError};
pub use self::flock::{FileLock, Filesystem};
pub use self::graph::Graph;
pub use self::hasher::StableHasher;
pub use self::hex::{hash_u64, short_hash, to_hex};
pub use self::into_url::IntoUrl;
pub use self::into_url_with_base::IntoUrlWithBase;
pub use self::lev_distance::{closest, closest_msg, lev_distance};
pub use self::lockserver::{LockServer, LockServerClient, LockServerStarted};
pub use self::progress::{Progress, ProgressStyle};
pub use self::queue::Queue;
pub use self::restricted_names::validate_package_name;
pub use self::rustc::Rustc;
pub use self::semver_ext::{OptVersionReq, VersionExt, VersionReqExt};
pub use self::to_semver::ToSemver;
pub use self::vcs::{existing_vcs_repo, FossilRepo, GitRepo, HgRepo, PijulRepo};
pub use self::workspace::{
    add_path_args, path_args, print_available_benches, print_available_binaries,
    print_available_examples, print_available_packages, print_available_tests,
};

mod canonical_url;
pub mod command_prelude;
pub mod config;
mod counter;
pub mod cpu;
mod dependency_queue;
pub mod diagnostic_server;
pub mod errors;
mod flock;
pub mod graph;
mod hasher;
pub mod hex;
pub mod important_paths;
pub mod interning;
pub mod into_url;
mod into_url_with_base;
pub mod job;
pub mod lev_distance;
mod lockserver;
pub mod machine_message;
pub mod network;
pub mod profile;
mod progress;
mod queue;
pub mod restricted_names;
pub mod rustc;
mod semver_ext;
pub mod to_semver;
pub mod toml;
mod vcs;
mod workspace;

pub fn elapsed(duration: Duration) -> String {
    let secs = duration.as_secs();

    if secs >= 60 {
        format!("{}m {:02}s", secs / 60, secs % 60)
    } else {
        format!("{}.{:02}s", secs, duration.subsec_nanos() / 10_000_000)
    }
}

pub fn iter_join_onto<W, I, T>(mut w: W, iter: I, delim: &str) -> fmt::Result
where
    W: fmt::Write,
    I: IntoIterator<Item = T>,
    T: std::fmt::Display,
{
    let mut it = iter.into_iter().peekable();
    while let Some(n) = it.next() {
        write!(w, "{}", n)?;
        if it.peek().is_some() {
            write!(w, "{}", delim)?;
        }
    }
    Ok(())
}

pub fn iter_join<I, T>(iter: I, delim: &str) -> String
where
    I: IntoIterator<Item = T>,
    T: std::fmt::Display,
{
    let mut s = String::new();
    let _ = iter_join_onto(&mut s, iter, delim);
    s
}

pub fn indented_lines(text: &str) -> String {
    text.lines()
        .map(|line| {
            if line.is_empty() {
                String::from("\n")
            } else {
                format!("  {}\n", line)
            }
        })
        .collect()
}