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use std::{
    ops::Deref,
    sync::Arc,
};

#[derive(Clone, Debug)]
pub struct Atom(Arc<str>);

impl Atom
{
    #[inline]
    pub fn as_str(
        &self
    ) -> &str {
        self.as_ref()
    }

    #[inline]
    pub fn to_string(
        &self
    ) -> String {
        self.as_str().to_string()
    }

    #[inline]
    pub fn new<S: AsRef<str>>(
        text: S
    ) -> Self {
        Self::from(text.as_ref())
    }
}

impl Deref
for Atom
{
    type Target = Arc<str>;

    fn deref(
        &self
    ) -> &Self::Target {
        &self.0
    }
}

impl AsRef<str>
for Atom
{
    fn as_ref(
        &self
    ) -> &str {
        self.0.as_ref()
    }
}

pub trait IntoAtom
{
    fn into_atom(
        self
    ) -> Atom;
}

impl<A: Into<Atom>> IntoAtom
for A {
    fn into_atom(
        self
    ) -> Atom {
        self.into()
    }
}

impl From<&str>
for Atom
{
    fn from(
        value: &str
    ) -> Self {
        Self::from(Arc::from(value))
    }
}

impl From<String>
for Atom
{
    fn from(
        value: String
    ) -> Self {
        Self::from(Arc::from(value.as_ref()))
    }
}

impl From<Arc<str>>
for Atom
{
    fn from(
        value: Arc<str>
    ) -> Self {
        Self(value)
    }
}