wami 0.10.0

//! STS Session Token Service
//!
//! Orchestrates session token generation operations.

use crate::error::Result;
use crate::provider::{AwsProvider, CloudProvider, ResourceType};
use crate::store::traits::SessionStore;
use crate::wami::sts::session::SessionStatus;
use crate::wami::sts::session_token::GetSessionTokenRequest;
use crate::wami::sts::{Credentials, StsSession};
use chrono::{Duration, Utc};
use std::sync::{Arc, RwLock};

/// Response from getting a session token
#[derive(Debug, Clone)]
pub struct GetSessionTokenResponse {
    pub credentials: Credentials,
}

/// Service for generating session tokens
///
/// Provides high-level operations for session token creation.
pub struct SessionTokenService<S> {
    store: Arc<RwLock<S>>,
    provider: Arc<dyn CloudProvider>,
    account_id: String,
}

impl<S: SessionStore> SessionTokenService<S> {
    /// Create a new SessionTokenService with default AWS provider
    pub fn new(store: Arc<RwLock<S>>, account_id: String) -> Self {
        Self {
            store,
            provider: Arc::new(AwsProvider::new()),
            account_id,
        }
    }

    /// Returns a new service instance with different provider
    pub fn with_provider(&self, provider: Arc<dyn CloudProvider>) -> Self {
        Self {
            store: self.store.clone(),
            provider,
            account_id: self.account_id.clone(),
        }
    }

    /// Get a session token
    ///
    /// Generates temporary credentials for the current user.
    pub async fn get_session_token(
        &self,
        request: GetSessionTokenRequest,
        principal_arn: &str,
    ) -> Result<GetSessionTokenResponse> {
        // Validate request
        request.validate()?;

        // Determine session duration (default: 1 hour, max: 36 hours)
        let duration_seconds = request.duration_seconds.unwrap_or(3600);
        let expiration = Utc::now() + Duration::seconds(duration_seconds as i64);

        // Generate credentials
        let access_key_id = self.provider.generate_resource_id(ResourceType::AccessKey);
        let secret_access_key = format!(
            "SECRET{}",
            uuid::Uuid::new_v4().to_string().replace('-', "")
        );
        let session_token = format!("TOKEN{}", uuid::Uuid::new_v4().to_string().replace('-', ""));

        let session_arn = format!(
            "arn:aws:sts::{}:session/{}",
            self.account_id,
            &session_token[..16]
        );
        let wami_arn = self.provider.generate_wami_arn(
            ResourceType::StsSession,
            &self.account_id,
            "/",
            &session_token[..16],
        );

        let credentials = Credentials {
            access_key_id: access_key_id.clone(),
            secret_access_key: secret_access_key.clone(),
            session_token: session_token.clone(),
            expiration,
            arn: session_arn.clone(),
            wami_arn: wami_arn.clone(),
            providers: vec![],
            tenant_id: None,
        };

        // Create and store session
        let session = StsSession {
            session_token: session_token.clone(),
            access_key_id,
            secret_access_key,
            expiration,
            status: SessionStatus::Active,
            assumed_role_arn: None,
            federated_user_name: None,
            principal_arn: Some(principal_arn.to_string()),
            arn: session_arn,
            wami_arn,
            providers: vec![],
            tenant_id: None,
            created_at: Utc::now(),
            last_used: None,
        };

        self.store.write().unwrap().create_session(session).await?;

        Ok(GetSessionTokenResponse { credentials })
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::store::memory::InMemoryWamiStore;

    fn setup_service() -> SessionTokenService<InMemoryWamiStore> {
        let store = Arc::new(RwLock::new(InMemoryWamiStore::default()));
        SessionTokenService::new(store, "123456789012".to_string())
    }

    #[tokio::test]
    async fn test_get_session_token() {
        let service = setup_service();

        let request = GetSessionTokenRequest {
            duration_seconds: Some(3600),
            serial_number: None,
            token_code: None,
        };

        let response = service
            .get_session_token(request, "arn:aws:iam::123456789012:user/alice")
            .await
            .unwrap();

        assert!(!response.credentials.access_key_id.is_empty());
        assert!(!response.credentials.session_token.is_empty());
        assert!(response.credentials.expiration > Utc::now());
    }

    #[tokio::test]
    async fn test_get_session_token_with_mfa() {
        let service = setup_service();

        let request = GetSessionTokenRequest {
            duration_seconds: Some(7200),
            serial_number: Some("arn:aws:iam::123456789012:mfa/alice".to_string()),
            token_code: Some("123456".to_string()),
        };

        let response = service
            .get_session_token(request, "arn:aws:iam::123456789012:user/alice")
            .await
            .unwrap();

        assert!(response.credentials.expiration > Utc::now());
    }

    #[tokio::test]
    async fn test_get_session_token_invalid_duration() {
        let service = setup_service();

        let request = GetSessionTokenRequest {
            duration_seconds: Some(100), // Too short
            serial_number: None,
            token_code: None,
        };

        let result = service
            .get_session_token(request, "arn:aws:iam::123456789012:user/alice")
            .await;

        assert!(result.is_err());
    }

    #[tokio::test]
    async fn test_get_session_token_creates_session() {
        let service = setup_service();

        let request = GetSessionTokenRequest {
            duration_seconds: Some(3600),
            serial_number: None,
            token_code: None,
        };

        let response = service
            .get_session_token(request, "arn:aws:iam::123456789012:user/bob")
            .await
            .unwrap();

        // Verify session was created
        let sessions = service
            .store
            .read()
            .unwrap()
            .list_sessions(None)
            .await
            .unwrap();
        assert_eq!(sessions.len(), 1);
        assert_eq!(
            sessions[0].session_token,
            response.credentials.session_token
        );
    }
}