use crate::{
    database::{Database, User},
    routes::ui::error::MyError,
};
use anyhow::anyhow;
use rocket::{
    outcome::Outcome,
    request::{self, FromRequest},
    Request, State,
};

pub struct Session {
    pub user: User,
}

impl Session {
    pub async fn from_request_ut(req: &Request<'_>) -> Result<Self, MyError> {
        let cookie = req
            .cookies()
            .get_private("user")
            .ok_or(anyhow!("login required"))?;
        let username = cookie.value();

        let db = req.guard::<&State<Database>>().await.unwrap();
        let user = db
            .users
            .get(&username.to_string())?
            .ok_or(anyhow!("user not found"))?;

        Ok(Session { user })
    }
}

impl<'r> FromRequest<'r> for Session {
    type Error = MyError;

    fn from_request<'life0, 'async_trait>(
        request: &'r Request<'life0>,
    ) -> core::pin::Pin<
        Box<
            dyn core::future::Future<Output = request::Outcome<Self, Self::Error>>
                + core::marker::Send
                + 'async_trait,
        >,
    >
    where
        'r: 'async_trait,
        'life0: 'async_trait,
        Self: 'async_trait,
    {
        Box::pin(async move {
            match Self::from_request_ut(request).await {
                Ok(x) => Outcome::Success(x),
                Err(_) => Outcome::Forward(()),
            }
        })
    }
}