use std::cmp::{max, min};
use termion;
use termion::color;

pub struct Terminal {
    width: Option<u16>,
}

impl Terminal {
    pub fn new() -> Self {
        Self {
            width: termion::terminal_size().map(|(w, _)| w).ok(),
        }
    }

    pub fn print_separator<P: AsRef<str>>(&self, message: P) {
        let message = message.as_ref();
        match self.width {
            Some(width) => {
                println!(
                    "\n{}―― {} {:―^border$}{}",
                    color::Fg(color::LightWhite),
                    message,
                    "",
                    color::Fg(color::Reset),
                    border = max(2, min(80, width as usize) - 3 - message.len())
                );
            }
            None => {
                println!("―― {} ――", message);
            }
        }
    }

    pub fn print_warning<P: AsRef<str>>(&self, message: P) {
        let message = message.as_ref();

        match self.width {
            Some(_) => {
                println!(
                    "{}{}{}",
                    color::Fg(color::LightYellow),
                    message,
                    color::Fg(color::Reset)
                );
            }
            None => {
                println!("{}", message);
            }
        }
    }

    pub fn print_result<P: AsRef<str>>(&self, key: P, succeeded: bool) {
        let key = key.as_ref();

        match self.width {
            Some(_) => {
                if succeeded {
                    println!(
                        "{}: {}OK{}",
                        key,
                        color::Fg(color::LightGreen),
                        color::Fg(color::Reset)
                    );
                } else {
                    println!(
                        "{}: {}FAILED{}",
                        key,
                        color::Fg(color::LightRed),
                        color::Fg(color::Reset)
                    );
                }
            }
            None => {
                println!("{}: {}", key, if succeeded { "OK" } else { "FAILED" });
            }
        }
    }
}