reinhardt-testkit 0.2.0-rc.1

use std::sync::Arc;
use std::time::Duration;

use uuid::Uuid;

use super::error::TestAuthError;
use super::identity::SessionIdentity;
use super::secondary::SecondaryAuth;
use super::secondary::TotpSecondaryAuth;
use super::traits::ForceLoginUser;
use crate::client::APIClient;

/// Entry point for building auth configurations on an [`APIClient`].
///
/// Returned by [`APIClient::auth()`].
pub struct AuthBuilder<'a> {
	client: &'a APIClient,
}

impl<'a> AuthBuilder<'a> {
	/// Create a new `AuthBuilder` for the given client.
	pub(crate) fn new(client: &'a APIClient) -> Self {
		Self { client }
	}

	/// Configure session-based authentication.
	///
	/// Creates a real session in the `AsyncSessionBackend` and sets the
	/// `sessionid` cookie on the client. The session will be validated by
	/// `CookieSessionAuthMiddleware` on subsequent requests.
	pub fn session(
		self,
		user: &impl ForceLoginUser,
		backend: Arc<dyn reinhardt_middleware::session::AsyncSessionBackend>,
	) -> SessionAuthBuilder<'a> {
		SessionAuthBuilder {
			client: self.client,
			identity: SessionIdentity::from_user(user),
			backend,
			ttl: Duration::from_secs(30 * 60),
			secondary: vec![],
		}
	}

	/// Configure JWT Bearer token authentication.
	pub fn jwt(self, user: &impl ForceLoginUser, config: JwtTestConfig) -> JwtAuthBuilder<'a> {
		JwtAuthBuilder {
			client: self.client,
			identity: SessionIdentity::from_user(user),
			config,
			secondary: vec![],
		}
	}
}

/// Builder for session-based test authentication.
///
/// Created by [`AuthBuilder::session()`].
pub struct SessionAuthBuilder<'a> {
	client: &'a APIClient,
	identity: SessionIdentity,
	backend: Arc<dyn reinhardt_middleware::session::AsyncSessionBackend>,
	ttl: Duration,
	secondary: Vec<Box<dyn SecondaryAuth>>,
}

impl<'a> SessionAuthBuilder<'a> {
	/// Override the `is_staff` flag.
	///
	/// Use this when the user's `ForceLoginUser` impl defaults `is_staff` to `false`
	/// but the test requires staff access.
	pub fn with_staff(mut self, is_staff: bool) -> Self {
		self.identity.is_staff = is_staff;
		self
	}

	/// Override the `is_superuser` flag.
	pub fn with_superuser(mut self, is_superuser: bool) -> Self {
		self.identity.is_superuser = is_superuser;
		self
	}

	/// Set the session TTL. Default: 30 minutes.
	pub fn with_ttl(mut self, ttl: Duration) -> Self {
		self.ttl = ttl;
		self
	}

	/// Add TOTP MFA as a secondary auth layer.
	///
	/// Uses a pre-generated TOTP code. Generate it from the user's registered
	/// secret before calling this method.
	pub fn with_mfa_code(self, code: impl Into<String>) -> Self {
		self.with_secondary(TotpSecondaryAuth::with_code_only(code))
	}

	/// Add a custom secondary auth layer.
	pub fn with_secondary(mut self, auth: impl SecondaryAuth + 'static) -> Self {
		self.secondary.push(Box::new(auth));
		self
	}

	/// Apply the authentication configuration to the client.
	///
	/// This creates a real session in the backend, sets the `sessionid` cookie,
	/// and applies any secondary auth layers.
	pub async fn apply(self) -> Result<(), TestAuthError> {
		// 1. Generate session ID
		let session_id = Uuid::now_v7().to_string();

		// 2. Build SessionData from identity
		let session_data = self.identity.to_session_data(&session_id, self.ttl);

		// 3. Save to AsyncSessionBackend
		self.backend
			.save(&session_data)
			.await
			.map_err(|e| TestAuthError::SessionError(e.to_string()))?;

		// 4. Set sessionid cookie on client
		self.client
			.set_cookie("sessionid", &session_id)
			.await
			.map_err(|e| TestAuthError::ClientError(e.to_string()))?;

		// 5. Apply secondary auth layers
		for secondary in &self.secondary {
			secondary
				.apply_to_client(self.client, &self.identity)
				.await?;
		}

		Ok(())
	}
}

/// Builder for JWT test authentication.
///
/// Created by [`AuthBuilder::jwt()`].
pub struct JwtAuthBuilder<'a> {
	client: &'a APIClient,
	identity: SessionIdentity,
	config: JwtTestConfig,
	secondary: Vec<Box<dyn SecondaryAuth>>,
}

impl<'a> JwtAuthBuilder<'a> {
	/// Add a custom secondary auth layer.
	pub fn with_secondary(mut self, auth: impl SecondaryAuth + 'static) -> Self {
		self.secondary.push(Box::new(auth));
		self
	}

	/// Apply JWT authentication to the client.
	///
	/// Signs a JWT with the configured secret and sets the `Authorization: Bearer` header.
	pub async fn apply(self) -> Result<(), TestAuthError> {
		use reinhardt_auth::jwt::{Claims, JwtAuth};

		// Build claims
		let claims = Claims::new(
			self.identity.user_id.clone(),
			self.identity.user_id.clone(),
			chrono::Duration::seconds(self.config.expiry.as_secs() as i64),
			self.identity.is_staff,
			self.identity.is_superuser,
		);

		// Sign JWT
		let jwt_auth = JwtAuth::new(self.config.secret.as_bytes());
		let token = jwt_auth
			.encode(&claims)
			.map_err(|e| TestAuthError::JwtError(e.to_string()))?;

		// Set Authorization header
		self.client
			.set_header("Authorization", &format!("Bearer {token}"))
			.await
			.map_err(|e| TestAuthError::ClientError(e.to_string()))?;

		// Apply secondary auth layers
		for secondary in &self.secondary {
			secondary
				.apply_to_client(self.client, &self.identity)
				.await?;
		}

		Ok(())
	}
}

/// JWT configuration for test contexts.
#[derive(Clone, Debug)]
pub struct JwtTestConfig {
	/// Secret key for signing JWTs.
	pub secret: String,
	/// Token expiry duration. Default: 1 hour.
	pub expiry: Duration,
}

impl Default for JwtTestConfig {
	fn default() -> Self {
		Self {
			secret: "test-secret-key-for-testing-only".into(),
			expiry: Duration::from_secs(3600),
		}
	}
}