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use serde::{Deserialize, Serialize};

#[derive(Debug, Deserialize, Serialize)]
#[serde(deny_unknown_fields)]
#[serde(untagged)]
pub enum EmptyOption<T> {
    Some(T),
    None {},
}

// Helpers to make it more ergonomic

impl<T> From<EmptyOption<T>> for Option<T> {
    fn from(empty_option: EmptyOption<T>) -> Option<T> {
        match empty_option {
            EmptyOption::Some(option) => Some(option),
            EmptyOption::None {} => None,
        }
    }
}

impl<T> From<Option<T>> for EmptyOption<T> {
    fn from(option: Option<T>) -> EmptyOption<T> {
        match option {
            Some(option) => EmptyOption::Some(option),
            None {} => EmptyOption::None {},
        }
    }
}

impl<T> EmptyOption<T> {
    pub fn into_option(self) -> Option<T> {
        self.into()
    }
    pub fn as_option(&self) -> Option<&T> {
        match self {
            EmptyOption::Some(option) => Some(option),
            EmptyOption::None {} => None,
        }
    }
}