use atty;use once_cell::sync::Lazy;use std::fmt;use std::io::Write;use termcolor::Color::{Ansi256, Black, Blue, Cyan, Green, Red, White, Yellow};use termcolor::{Ansi, ColorSpec, WriteColor};
#[cfg(windows)]use termcolor::{BufferWriter, ColorChoice};
static NO_COLOR: Lazy<bool> = Lazy::new(|| std::env::var_os("NO_COLOR").is_some());
static IS_TTY: Lazy<bool> = Lazy::new(|| atty::is(atty::Stream::Stdout));
pub fn is_tty() -> bool { *IS_TTY}
pub fn use_color() -> bool { !(*NO_COLOR)}
#[cfg(windows)]pub fn enable_ansi() { BufferWriter::stdout(ColorChoice::AlwaysAnsi);}
fn style<S: AsRef<str>>(s: S, colorspec: ColorSpec) -> impl fmt::Display { if !use_color() { return String::from(s.as_ref()); } let mut v = Vec::new(); let mut ansi_writer = Ansi::new(&mut v); ansi_writer.set_color(&colorspec).unwrap(); ansi_writer.write_all(s.as_ref().as_bytes()).unwrap(); ansi_writer.reset().unwrap(); String::from_utf8_lossy(&v).into_owned()}
pub fn red_bold<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Red)).set_bold(true); style(s, style_spec)}
pub fn green_bold<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Green)).set_bold(true); style(s, style_spec)}
pub fn italic<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_italic(true); style(s, style_spec)}
pub fn italic_gray<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Ansi256(8))).set_italic(true); style(s, style_spec)}
pub fn italic_bold<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_bold(true).set_italic(true); style(s, style_spec)}
pub fn white_on_red<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_bg(Some(Red)).set_fg(Some(White)); style(s, style_spec)}
pub fn black_on_green<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_bg(Some(Green)).set_fg(Some(Black)); style(s, style_spec)}
pub fn yellow<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Yellow)); style(s, style_spec)}
pub fn cyan<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Cyan)); style(s, style_spec)}
pub fn red<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Red)); style(s, style_spec)}
pub fn green<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Green)); style(s, style_spec)}
pub fn bold<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_bold(true); style(s, style_spec)}
pub fn gray<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Ansi256(245))); style(s, style_spec)}
pub fn intense_blue<S: AsRef<str>>(s: S) -> impl fmt::Display { let mut style_spec = ColorSpec::new(); style_spec.set_fg(Some(Blue)).set_intense(true); style(s, style_spec)}