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//! The trait definition of authentication providers.

use async_trait::async_trait;

use crate::authentication::error::error_type::AuthenticationError;
use crate::authentication::scheme::authentication::Authentication;
use crate::user_details::UserDetails;

/// An authentication provider executes the authentication for an `Authentication` object and returns
/// either a object of `UserDetails` (implementation of the marker trait) or an `AuthenticationError`.
#[async_trait]
pub trait AuthenticationProvider: AuthenticationProviderClone {
    #[allow(clippy::borrowed_box)]
    async fn authenticate(
        &self,
        authentication: &Box<dyn Authentication>,
    ) -> Result<Box<dyn UserDetails>, AuthenticationError>;
}

/// An authentication provider must be cloneable, `send` and `sync`.
/// Therefore it has to implement the `AuthenticationProviderClone` trait to be cloneable as a boxed object.
pub trait AuthenticationProviderClone: Send + Sync {
    fn clone_box(&self) -> Box<dyn AuthenticationProvider>;
}

impl<U> AuthenticationProviderClone for U
where
    U: 'static + AuthenticationProvider + Clone,
{
    fn clone_box(&self) -> Box<dyn AuthenticationProvider> {
        Box::new(self.clone())
    }
}

impl Clone for Box<dyn AuthenticationProvider> {
    fn clone(&self) -> Self {
        self.clone_box()
    }
}