api_openai 0.3.0

//! Advanced Authentication Tests
//!
//! This module provides comprehensive testing for advanced authentication scenarios
//! including token refresh, multi-tenant authentication, OAuth integration,
//! security hardening, and authentication failure recovery.
//!
//! # Test Coverage
//!
//! - Token refresh and expiration handling
//! - Multi-tenant authentication patterns
//! - OAuth 2.0 flow integration
//! - Authentication with rate limiting
//! - Security hardening and audit trails
//! - Advanced error recovery mechanisms
//! - Performance under authentication load

#![ allow( clippy::unreadable_literal ) ]
#![ allow( clippy::uninlined_format_args ) ]
#![ allow( clippy::std_instead_of_core ) ]
#![ allow( clippy::useless_vec ) ]
#![ allow( clippy::unused_async ) ]
#![ allow( clippy::return_self_not_must_use ) ]
#![ allow( clippy::cast_sign_loss ) ]
#![ allow( clippy::let_and_return ) ]
#![ allow( clippy::no_effect_underscore_binding ) ]
#![ allow( clippy::doc_markdown ) ]
#![ allow( clippy::single_component_path_imports ) ]
#![ allow( clippy::ignore_without_reason ) ]

use api_openai::ClientApiAccessors;
use api_openai::exposed::
{
  environment ::
  {
    OpenaiEnvironmentImpl,
  },
  secret ::Secret,
  error ::OpenAIError,
  client ::Client,
};
use std::
{
  collections ::HashMap,
  time ::{ Duration, Instant },
  sync ::{ Arc, Mutex },
};
use tokio::time::sleep;
use futures;
use chrono;

/// Advanced authentication configuration for testing
#[ derive( Debug, Clone ) ]
pub struct AdvancedAuthConfig
{
  /// Primary API key for authentication
  pub primary_api_key : String,
  /// Secondary API key for failover scenarios
  pub secondary_api_key : Option< String >,
  /// OAuth access token for OAuth scenarios
  pub oauth_access_token : Option< String >,
  /// OAuth refresh token for token refresh tests
  pub oauth_refresh_token : Option< String >,
  /// Token expiration timestamp (Unix epoch)
  pub token_expires_at : Option< u64 >,
  /// Organization context for multi-tenant tests
  pub organization_context : Option< String >,
  /// Project context for project-scoped authentication
  pub project_context : Option< String >,
  /// Authentication audit trail enabled
  pub audit_trail_enabled : bool,
  /// Maximum authentication retries
  pub max_auth_retries : u32,
  /// Authentication timeout duration
  pub auth_timeout : Duration,
}

impl Default for AdvancedAuthConfig
{
  fn default() -> Self
  {
    Self
    {
      primary_api_key : "sk-test1234567890abcdef1234567890".to_string(),
      secondary_api_key : None,
      oauth_access_token : None,
      oauth_refresh_token : None,
      token_expires_at : None,
      organization_context : None,
      project_context : None,
      audit_trail_enabled : false,
      max_auth_retries : 3,
      auth_timeout : Duration::from_secs(30),
    }
  }
}

/// OAuth token response structure for testing
#[ derive( Debug, Clone, serde::Deserialize, serde::Serialize ) ]
pub struct OAuthTokenResponse
{
  /// Access token for API requests
  pub access_token : String,
  /// Token type (usually "Bearer")
  pub token_type : String,
  /// Token expiration in seconds
  pub expires_in : u64,
  /// Refresh token for token renewal
  pub refresh_token : Option< String >,
  /// Scope of the access token
  pub scope : Option< String >,
}

/// Multi-tenant authentication context
#[ derive( Debug, Clone ) ]
pub struct MultiTenantAuthContext
{
  /// Primary tenant organization ID
  pub primary_org_id : String,
  /// Secondary tenant organization ID for cross-tenant tests
  pub secondary_org_id : Option< String >,
  /// Per-tenant API keys mapping
  pub tenant_api_keys : HashMap< String, String >,
  /// Per-tenant rate limits
  pub tenant_rate_limits : HashMap< String, u32 >,
  /// Tenant isolation enforcement enabled
  pub isolation_enforced : bool,
}

/// Authentication audit log entry
#[ derive( Debug, Clone ) ]
pub struct AuthAuditLogEntry
{
  /// Timestamp of the authentication event
  pub timestamp : Instant,
  /// Authentication event type
  pub event_type : String,
  /// Success or failure indicator
  pub success : bool,
  /// User/client identifier
  pub client_id : String,
  /// Additional context information
  pub context : HashMap< String, String >,
}

/// Advanced authentication manager for comprehensive testing scenarios
pub struct AdvancedAuthManager
{
  /// Current authentication configuration
  pub config : AdvancedAuthConfig,
  /// Multi-tenant context if enabled
  pub multi_tenant_context : Option< MultiTenantAuthContext >,
  /// Authentication audit log
  pub audit_log : Arc< Mutex< Vec< AuthAuditLogEntry > > >,
  /// Token refresh callback for OAuth scenarios
  pub token_refresh_callback : Option< Box< dyn Fn() -> Result< OAuthTokenResponse, OpenAIError > + Send + Sync > >,
}

impl AdvancedAuthManager
{
  /// Create a new advanced authentication manager
  #[ allow( clippy::must_use_candidate ) ]
  pub fn new(config : AdvancedAuthConfig) -> Self
  {
    Self
    {
      config,
      multi_tenant_context : None,
      audit_log : Arc::new(Mutex::new(Vec::new())),
      token_refresh_callback : None,
    }
  }

  /// Add multi-tenant context to the manager
  #[ allow( clippy::must_use_candidate ) ]
  pub fn with_multi_tenant_context(mut self, context : MultiTenantAuthContext) -> Self
  {
    self.multi_tenant_context = Some(context);
    self
  }

  /// Add token refresh callback for OAuth scenarios
  pub fn with_token_refresh_callback< F >(mut self, callback : F) -> Self
  where
    F: Fn() -> Result< OAuthTokenResponse, OpenAIError > + Send + Sync + 'static,
  {
    self.token_refresh_callback = Some(Box::new(callback));
    self
  }
}

impl std::fmt::Debug for AdvancedAuthManager
{
  fn fmt(&self, f : &mut std::fmt::Formatter< '_ >) -> std::fmt::Result
  {
    f.debug_struct("AdvancedAuthManager")
      .field("config", &self.config)
      .field("multi_tenant_context", &self.multi_tenant_context)
      .field("audit_log", &self.audit_log)
      .field("token_refresh_callback", &self.token_refresh_callback.is_some())
      .finish()
  }
}

/// Test token refresh mechanism with OAuth
#[ tokio::test ]
async fn test_oauth_token_refresh_mechanism()
{
  // This test should initially fail until OAuth refresh mechanism is implemented
  let config = AdvancedAuthConfig
  {
    oauth_access_token : Some("expired_access_token_12345".to_string()),
    oauth_refresh_token : Some("refresh_token_67890".to_string()),
    token_expires_at : Some(chrono::Utc::now().timestamp() as u64 - 3600), // Expired 1 hour ago
    ..AdvancedAuthConfig::default()
  };

  let auth_manager = AdvancedAuthManager::new(config)
    .with_token_refresh_callback(|| {
      // Simulate OAuth token refresh
      Ok(OAuthTokenResponse
      {
        access_token : "new_access_token_54321".to_string(),
        token_type : "Bearer".to_string(),
        expires_in : 3600,
        refresh_token : Some("new_refresh_token_09876".to_string()),
        scope : Some("read write".to_string()),
      })
    });

  // Expected : Should automatically refresh token when making API call with expired token
  // Currently will fail until OAuth refresh mechanism is implemented

  // For now, verify the auth manager structure is created correctly
  assert!(auth_manager.config.oauth_access_token.is_some());
  assert!(auth_manager.config.oauth_refresh_token.is_some());
  assert!(auth_manager.token_refresh_callback.is_some());
}

/// Test multi-tenant authentication isolation
#[ tokio::test ]
async fn test_multi_tenant_authentication_isolation()
{
  let mut tenant_keys = HashMap::new();
  tenant_keys.insert("tenant_a".to_string(), "sk-tenant_a_12345".to_string());
  tenant_keys.insert("tenant_b".to_string(), "sk-tenant_b_67890".to_string());

  let mut tenant_limits = HashMap::new();
  tenant_limits.insert("tenant_a".to_string(), 100);
  tenant_limits.insert("tenant_b".to_string(), 200);

  let multi_tenant_context = MultiTenantAuthContext
  {
    primary_org_id : "org_primary_123".to_string(),
    secondary_org_id : Some("org_secondary_456".to_string()),
    tenant_api_keys : tenant_keys,
    tenant_rate_limits : tenant_limits,
    isolation_enforced : true,
  };

  let auth_manager = AdvancedAuthManager::new(AdvancedAuthConfig::default())
    .with_multi_tenant_context(multi_tenant_context);

  // Expected : Should enforce tenant isolation and use correct API keys per tenant
  // Currently will fail until multi-tenant authentication is implemented

  // For now, verify the multi-tenant context is set up correctly
  assert!(auth_manager.multi_tenant_context.is_some());
  let context = auth_manager.multi_tenant_context.as_ref().unwrap();
  assert_eq!(context.tenant_api_keys.len(), 2);
  assert!(context.isolation_enforced);
}

/// Test authentication failover mechanism
#[ tokio::test ]
async fn test_authentication_failover_mechanism()
{
  let config = AdvancedAuthConfig
  {
    primary_api_key : "sk-invalid_primary_key".to_string(),
    secondary_api_key : Some("sk-valid_secondary_key_12345".to_string()),
    max_auth_retries : 2,
    ..AdvancedAuthConfig::default()
  };

  let auth_manager = AdvancedAuthManager::new(config);

  // Expected : Should automatically failover to secondary key when primary fails
  // Currently will fail until failover mechanism is implemented
  // TODO: Implement client creation and failover testing when mechanism is available

  // For now, verify failover configuration is set up correctly
  assert!(auth_manager.config.secondary_api_key.is_some());
  assert_eq!(auth_manager.config.max_auth_retries, 2);
}

/// Test authentication with rate limiting integration
#[ tokio::test ]
async fn test_authentication_with_rate_limiting()
{
  let config = AdvancedAuthConfig
  {
    primary_api_key : "sk-rate_limited_key_12345".to_string(),
    auth_timeout : Duration::from_secs(60),
    ..AdvancedAuthConfig::default()
  };

  let auth_manager = AdvancedAuthManager::new(config);

  // Expected : Should handle rate limiting scenarios gracefully with authentication
  // Currently will fail until rate limiting integration is implemented
  // TODO: Implement rate limiting test with rapid requests when integration is available

  // For now, verify rate limiting configuration
  assert_eq!(auth_manager.config.auth_timeout, Duration::from_secs(60));
}

/// Test authentication security hardening features
#[ tokio::test ]
async fn test_authentication_security_hardening()
{
  let config = AdvancedAuthConfig
  {
    primary_api_key : "sk-secure_key_with_validation".to_string(),
    audit_trail_enabled : true,
    ..AdvancedAuthConfig::default()
  };

  let auth_manager = AdvancedAuthManager::new(config);

  // Expected : Should implement security hardening features
  // Currently will fail until security hardening is implemented
  // TODO: Implement security hardening tests when features are available
  // Test 1: Key rotation detection and handling
  // Test 2: API key exposure prevention
  // Test 3: Audit trail functionality

  // For now, verify security configuration
  assert!(auth_manager.config.audit_trail_enabled);
}

/// Test concurrent authentication scenarios
#[ tokio::test ]
async fn test_concurrent_authentication_performance()
{
  let config = AdvancedAuthConfig
  {
    primary_api_key : "sk-concurrent_test_key_12345".to_string(),
    auth_timeout : Duration::from_secs(10),
    ..AdvancedAuthConfig::default()
  };

  let auth_manager = Arc::new(AdvancedAuthManager::new(config));

  // Expected : Should handle concurrent authentication requests efficiently
  // Currently will fail until concurrent auth optimization is implemented
  let concurrent_requests = 50;
  let mut handles = Vec::new();

  for _i in 0..concurrent_requests
  {
    let _manager_clone = Arc::clone(&auth_manager);
    let handle = tokio::spawn(async move {
      let start_time = Instant::now();

      // TODO: Implement concurrent authentication testing when client creation is available
      // Each task attempts to authenticate and make a request
      // Performance assertion : each auth + request should complete within timeout

      start_time.elapsed()
    });
    handles.push(handle);
  }

  let results = futures::future::join_all(handles).await;

  // For now, verify concurrent setup works
  assert_eq!(results.len(), concurrent_requests);
}

/// Test authentication error recovery mechanisms
#[ tokio::test ]
async fn test_authentication_error_recovery()
{
  let config = AdvancedAuthConfig
  {
    primary_api_key : "sk-recovery_test_key".to_string(),
    max_auth_retries : 5,
    auth_timeout : Duration::from_secs(30),
    ..AdvancedAuthConfig::default()
  };

  let auth_manager = AdvancedAuthManager::new(config);

  // Expected : Should implement sophisticated error recovery
  // Currently will fail until error recovery mechanisms are implemented
  // TODO: Implement error recovery testing for various scenarios when mechanisms are available
  // Test recovery from : network_timeout, invalid_key_temp, rate_limited, server_error

  // For now, verify recovery configuration
  assert_eq!(auth_manager.config.max_auth_retries, 5);
}

/// Test authentication performance under load
#[ tokio::test ]
async fn test_authentication_performance_under_load()
{
  let config = AdvancedAuthConfig
  {
    primary_api_key : "sk-performance_test_key_12345".to_string(),
    auth_timeout : Duration::from_secs(5),
    ..AdvancedAuthConfig::default()
  };

  let _auth_manager = AdvancedAuthManager::new(config);

  // Expected : Should maintain performance under authentication load
  // Currently will fail until performance optimizations are implemented
  let load_test_duration = Duration::from_secs(10);
  let start_time = Instant::now();
  let _successful_auths = 0;
  let mut total_attempts = 0;

  while start_time.elapsed() < load_test_duration
  {
    total_attempts += 1;

    // TODO: Implement authentication attempt simulation when available

    // Small delay to prevent overwhelming
    sleep(Duration::from_millis(10)).await;
  }

  // For now, verify load test setup
  assert!(load_test_duration.as_secs() > 0);
  assert!(total_attempts > 0);
}

/// Test authentication with custom headers and metadata
#[ tokio::test ]
async fn test_authentication_with_custom_headers()
{
  let config = AdvancedAuthConfig
  {
    primary_api_key : "sk-custom_headers_test_key".to_string(),
    organization_context : Some("org_custom_123".to_string()),
    project_context : Some("proj_custom_456".to_string()),
    ..AdvancedAuthConfig::default()
  };

  let auth_manager = AdvancedAuthManager::new(config);

  // Expected : Should support custom authentication headers and metadata
  // Currently will fail until custom header support is implemented
  // TODO: Implement custom header testing when support is available
  // Test : Custom authentication headers (X-Custom-Auth, X-Request-ID, X-Client-Version)
  // Test : Organization and project context headers

  // For now, verify custom header configuration
  assert!(auth_manager.config.organization_context.is_some());
  assert!(auth_manager.config.project_context.is_some());
}

/// Test authentication session management
#[ tokio::test ]
async fn test_authentication_session_management()
{
  let config = AdvancedAuthConfig
  {
    primary_api_key : "sk-session_test_key_12345".to_string(),
    auth_timeout : Duration::from_secs(300), // 5 minute sessions
    ..AdvancedAuthConfig::default()
  };

  let auth_manager = AdvancedAuthManager::new(config);

  // Expected : Should implement authentication session management
  // Currently will fail until session management is implemented
  // TODO: Implement session management tests when available
  // Test : Session creation and validation
  // Test : Session refresh
  // Test : Session expiration handling
  // Test : Session cleanup

  // For now, verify session timeout configuration
  assert_eq!(auth_manager.config.auth_timeout, Duration::from_secs(300));
}


/// Test integration with real OpenAI environment (requires API key)
#[ tokio::test ]
async fn test_advanced_auth_real_integration()
{
  // This test requires a real OpenAI API key - use workspace secret loading
  let secret = Secret::load_with_fallbacks("OPENAI_API_KEY")
    .expect("OPENAI_API_KEY required for real integration test");
  let environment = OpenaiEnvironmentImpl::build(
    secret,
    None, // organization_id
    None, // project_id
    api_openai ::environment::OpenAIRecommended::base_url().to_string(),
    api_openai ::environment::OpenAIRecommended::realtime_base_url().to_string(),
  ).expect("Failed to create environment");

  let client = Client::build(environment).expect("Failed to build client");
  let models_response = client.models().list().await;

  match models_response
  {
    Ok(models) =>
    {
      assert!(!models.data.is_empty(), "Should return list of available models");
      println!("✅ Real authentication successful - got {} models", models.data.len());
    },
    Err(e) =>
    {
      panic!("Real authentication failed : {e:?}");
    }
  }
}