use std::fmt;
use std::ops::Add;

#[derive(Debug, PartialEq, Clone, Copy)]
pub struct Clock {
    hours: i32,
    minutes: i32,
}

impl fmt::Display for Clock {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{:02}:{:02}", self.hours, self.minutes)
    }
}

impl Add<i32> for Clock {
    type Output = Self;

    fn add(self, minutes: i32) -> Self {
        Self::new(self.hours, self.minutes + minutes)
    }
}

/* impl From<Clock> for String {
 *     fn from(c: Clock) -> String {
 *         format!("{}",c)
 *     }
 * }
 */

impl Clock {
    pub fn new(hours: i32, minutes: i32) -> Self {
        let hours = hours + minutes / 60 - if minutes % 60 < 0 { 1 } else { 0 };
        let hours = hours % 24;
        let hours = hours + if hours < 0 { 24 } else { 0 };
        let minutes = minutes % 60;
        let minutes = minutes + if minutes < 0 { 60 } else { 0 };
        Clock { hours, minutes }
    }

    pub fn add_minutes(self, minutes: i32) -> Self {
        self + minutes
    }
}