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

use serde::{Deserialize, Serialize};

/// Cheap-to-clone handle to per-session user data.
#[derive(Debug, Clone)]
pub struct UserState(Arc<UserStateInner>);

impl Deref for UserState {
    type Target = UserStateInner;
    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl From<UserStateInner> for UserState {
    fn from(value: UserStateInner) -> Self {
        Self(Arc::new(value))
    }
}

/// Per-session user data stored in the tower-sessions session store.
///
/// Persisted across requests for the lifetime of the session.
#[derive(Debug, Clone, Serialize, Deserialize, Default)]
pub struct UserStateInner {
    /// Subject identifier from Keycloak (unique user ID).
    pub sub: String,
    /// OAuth2 access token.
    pub access_token: String,
    /// OAuth2 refresh token.
    pub refresh_token: String,
    /// Basic user profile.
    pub user: User,
}

/// Basic user profile stored alongside the session.
#[derive(Debug, Clone, Serialize, Deserialize, Default)]
pub struct User {
    /// Email address.
    pub email: String,
    /// Display name (preferred_username or full name from Keycloak).
    pub name: String,
    /// Avatar / profile picture URL.
    pub avatar_url: String,
}