#[derive(Default)]
pub struct Datetime<H> {
    handler: H,
}

impl<H> Datetime<H> {
    pub fn new(handler: H) -> Self {
        Self { handler }
    }
}

pub trait Handler {
    fn year(&self) -> u16;
    fn month(&self) -> u8;
    fn day(&self) -> u8;
    fn hour(&self) -> u8;
    fn minute(&self) -> u8;
    fn second(&self) -> u8;
    fn day_of_year(&self) -> u16;
    fn day_of_week(&self) -> u8;
    fn is_dst(&self) -> u8;
}

impl<H: Handler> Datetime<H> {
    pub(crate) fn year(&self) -> u16 {
        self.handler.year()
    }

    pub(crate) fn month(&self) -> u8 {
        self.handler.month()
    }

    pub(crate) fn day(&self) -> u8 {
        self.handler.day()
    }

    pub(crate) fn hour(&self) -> u8 {
        self.handler.hour()
    }

    pub(crate) fn minute(&self) -> u8 {
        self.handler.minute()
    }

    pub(crate) fn second(&self) -> u8 {
        self.handler.second()
    }

    pub(crate) fn day_of_year(&self) -> u16 {
        self.handler.day_of_year()
    }

    pub(crate) fn day_of_week(&self) -> u8 {
        self.handler.day_of_week()
    }

    pub(crate) fn is_dst(&self) -> u8 {
        self.handler.is_dst()
    }
}