#![allow(unused_crate_dependencies)]
//! Comprehensive brokers module tests targeting 95% coverage
//! Tests for brokers/mod.rs and related broker connection functionality

use trading_engine::brokers::config::BrokerConnectorConfig;
use trading_engine::brokers::BrokerConnector;

// ============================================================================
// BrokerConnector::new() Tests
// ============================================================================

#[cfg(test)]
mod broker_connector_creation_tests {
    use super::*;

    #[test]
    fn test_broker_connector_new_default_config() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);
        // Verify connector was created (should not panic)
        assert!(format!("{:?}", connector).contains("BrokerConnector"));
    }

    #[test]
    fn test_broker_connector_new_custom_config() {
        let mut config = BrokerConnectorConfig::default();
        config.brokers.interactive_brokers.enabled = true;
        config.fail_on_broker_error = true;

        let connector = BrokerConnector::new(config);
        assert!(format!("{:?}", connector).contains("BrokerConnector"));
    }

    #[test]
    fn test_broker_connector_new_disabled_config() {
        let mut config = BrokerConnectorConfig::default();
        config.brokers.interactive_brokers.enabled = false;

        let connector = BrokerConnector::new(config);
        assert!(format!("{:?}", connector).contains("BrokerConnector"));
    }

    #[test]
    fn test_multiple_broker_connectors_independent() {
        let config1 = BrokerConnectorConfig::default();
        let config2 = BrokerConnectorConfig::default();

        let connector1 = BrokerConnector::new(config1);
        let connector2 = BrokerConnector::new(config2);

        // Both should be independent instances
        assert!(format!("{:?}", connector1).contains("BrokerConnector"));
        assert!(format!("{:?}", connector2).contains("BrokerConnector"));
    }
}

// ============================================================================
// BrokerConnector::initialize() Tests
// ============================================================================

#[cfg(test)]
mod broker_connector_initialization_tests {
    use super::*;

    #[tokio::test]
    async fn test_broker_connector_initialize_success() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        let result = connector.initialize().await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_initialize_multiple_times() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        // Initialize multiple times should be safe
        assert!(connector.initialize().await.is_ok());
        assert!(connector.initialize().await.is_ok());
        assert!(connector.initialize().await.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_initialize_with_custom_config() {
        let mut config = BrokerConnectorConfig::default();
        config.fail_on_broker_error = true;

        let mut connector = BrokerConnector::new(config);
        let result = connector.initialize().await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_initialize_concurrent() {
        let config = BrokerConnectorConfig::default();
        let mut connector1 = BrokerConnector::new(config.clone());
        let mut connector2 = BrokerConnector::new(config);

        let (result1, result2) = tokio::join!(
            connector1.initialize(),
            connector2.initialize()
        );

        assert!(result1.is_ok());
        assert!(result2.is_ok());
    }
}

// ============================================================================
// BrokerConnector::submit_order() Tests
// ============================================================================

#[cfg(test)]
mod broker_connector_submit_order_tests {
    use super::*;

    #[tokio::test]
    async fn test_broker_connector_submit_order_success() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let result = connector.submit_order("ORD_123").await;
        assert!(result.is_ok());

        let broker_order_id = result.unwrap();
        assert!(!broker_order_id.is_empty());
    }

    #[tokio::test]
    async fn test_broker_connector_submit_order_multiple() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let result1 = connector.submit_order("ORD_001").await;
        let result2 = connector.submit_order("ORD_002").await;
        let result3 = connector.submit_order("ORD_003").await;

        assert!(result1.is_ok());
        assert!(result2.is_ok());
        assert!(result3.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_submit_order_empty_id() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let result = connector.submit_order("").await;
        assert!(result.is_ok()); // Placeholder accepts empty IDs
    }

    #[tokio::test]
    async fn test_broker_connector_submit_order_special_characters() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let order_ids = vec![
            "ORD_ABC-123",
            "ORD:456",
            "ORD/789",
            "ORD.XYZ",
        ];

        for order_id in order_ids {
            let result = connector.submit_order(order_id).await;
            assert!(result.is_ok(), "Failed for order_id: {}", order_id);
        }
    }

    #[tokio::test]
    async fn test_broker_connector_submit_order_concurrent() {
        let config = BrokerConnectorConfig::default();
        let connector = std::sync::Arc::new(BrokerConnector::new(config));

        let mut handles = vec![];
        for i in 0..10 {
            let connector_clone = connector.clone();
            let handle = tokio::spawn(async move {
                let _ = connector_clone.submit_order(&format!("ORD_{}", i)).await;
            });
            handles.push(handle);
        }

        for handle in handles {
            handle.await.unwrap();
        }
    }

    #[tokio::test]
    async fn test_broker_connector_submit_order_long_id() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let long_id = "ORD_".to_string() + &"A".repeat(1000);
        let result = connector.submit_order(&long_id).await;
        assert!(result.is_ok());
    }
}

// ============================================================================
// BrokerConnector::cancel_order() Tests
// ============================================================================

#[cfg(test)]
mod broker_connector_cancel_order_tests {
    use super::*;

    #[tokio::test]
    async fn test_broker_connector_cancel_order_success() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let result = connector.cancel_order("ORD_123").await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_cancel_order_nonexistent() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let result = connector.cancel_order("NONEXISTENT").await;
        assert!(result.is_ok()); // Placeholder accepts any ID
    }

    #[tokio::test]
    async fn test_broker_connector_cancel_order_multiple_times() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        // Cancel same order multiple times
        let order_id = "ORD_999";
        assert!(connector.cancel_order(order_id).await.is_ok());
        assert!(connector.cancel_order(order_id).await.is_ok());
        assert!(connector.cancel_order(order_id).await.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_cancel_order_empty_id() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let result = connector.cancel_order("").await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_cancel_order_concurrent() {
        let config = BrokerConnectorConfig::default();
        let connector = std::sync::Arc::new(BrokerConnector::new(config));

        let mut handles = vec![];
        for i in 0..10 {
            let connector_clone = connector.clone();
            let handle = tokio::spawn(async move {
                let _ = connector_clone.cancel_order(&format!("ORD_{}", i)).await;
            });
            handles.push(handle);
        }

        for handle in handles {
            handle.await.unwrap();
        }
    }

    #[tokio::test]
    async fn test_broker_connector_submit_and_cancel_workflow() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        // Submit an order
        let submit_result = connector.submit_order("ORD_WORKFLOW").await;
        assert!(submit_result.is_ok());

        // Cancel the order
        let cancel_result = connector.cancel_order("ORD_WORKFLOW").await;
        assert!(cancel_result.is_ok());
    }
}

// ============================================================================
// BrokerConnector::get_connected_brokers() Tests
// ============================================================================

#[cfg(test)]
mod broker_connector_get_connected_brokers_tests {
    use super::*;

    #[tokio::test]
    async fn test_broker_connector_get_connected_brokers_initial() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let brokers = connector.get_connected_brokers().await;
        assert!(!brokers.is_empty());
        assert!(brokers.contains(&"InteractiveBrokers".to_string()));
    }

    #[tokio::test]
    async fn test_broker_connector_get_connected_brokers_after_init() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        connector.initialize().await.unwrap();

        let brokers = connector.get_connected_brokers().await;
        assert!(!brokers.is_empty());
    }

    #[tokio::test]
    async fn test_broker_connector_get_connected_brokers_multiple_calls() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let brokers1 = connector.get_connected_brokers().await;
        let brokers2 = connector.get_connected_brokers().await;
        let brokers3 = connector.get_connected_brokers().await;

        assert_eq!(brokers1, brokers2);
        assert_eq!(brokers2, brokers3);
    }

    #[tokio::test]
    async fn test_broker_connector_get_connected_brokers_concurrent() {
        let config = BrokerConnectorConfig::default();
        let connector = std::sync::Arc::new(BrokerConnector::new(config));

        let mut handles = vec![];
        for _ in 0..5 {
            let connector_clone = connector.clone();
            let handle = tokio::spawn(async move {
                connector_clone.get_connected_brokers().await
            });
            handles.push(handle);
        }

        for handle in handles {
            let brokers = handle.await.unwrap();
            assert!(!brokers.is_empty());
        }
    }
}

// ============================================================================
// BrokerConnector::shutdown() Tests
// ============================================================================

#[cfg(test)]
mod broker_connector_shutdown_tests {
    use super::*;

    #[tokio::test]
    async fn test_broker_connector_shutdown_success() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        connector.initialize().await.unwrap();

        let result = connector.shutdown().await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_shutdown_without_init() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        let result = connector.shutdown().await;
        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_shutdown_multiple_times() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        connector.initialize().await.unwrap();

        assert!(connector.shutdown().await.is_ok());
        assert!(connector.shutdown().await.is_ok());
        assert!(connector.shutdown().await.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_init_shutdown_cycle() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        // Multiple init-shutdown cycles
        for _ in 0..3 {
            assert!(connector.initialize().await.is_ok());
            assert!(connector.shutdown().await.is_ok());
        }
    }
}

// ============================================================================
// BrokerConfig Tests
// ============================================================================

#[cfg(test)]
mod broker_config_tests {
    use super::*;

    #[test]
    fn test_broker_config_default() {
        let config = BrokerConnectorConfig::default();
        assert!(format!("{:?}", config).contains("BrokerConnectorConfig"));
    }

    #[test]
    fn test_broker_config_enabled_flag() {
        let mut config = BrokerConnectorConfig::default();

        config.brokers.interactive_brokers.enabled = true;
        assert!(config.brokers.interactive_brokers.enabled);

        config.brokers.interactive_brokers.enabled = false;
        assert!(!config.brokers.interactive_brokers.enabled);
    }

    #[test]
    fn test_broker_config_fail_on_broker_error_flag() {
        let mut config = BrokerConnectorConfig::default();

        config.fail_on_broker_error = true;
        assert!(config.fail_on_broker_error);

        config.fail_on_broker_error = false;
        assert!(!config.fail_on_broker_error);
    }

    #[test]
    fn test_broker_config_clone() {
        let config1 = BrokerConnectorConfig::default();
        let config2 = config1.clone();

        assert_eq!(config1.brokers.interactive_brokers.enabled, config2.brokers.interactive_brokers.enabled);
        assert_eq!(config1.fail_on_broker_error, config2.fail_on_broker_error);
    }
}

// ============================================================================
// Integration and Workflow Tests
// ============================================================================

#[cfg(test)]
mod broker_connector_integration_tests {
    use super::*;

    #[tokio::test]
    async fn test_broker_connector_complete_workflow() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        // Initialize
        assert!(connector.initialize().await.is_ok());

        // Get connected brokers
        let brokers = connector.get_connected_brokers().await;
        assert!(!brokers.is_empty());

        // Submit orders
        let order1 = connector.submit_order("ORD_001").await;
        let order2 = connector.submit_order("ORD_002").await;
        assert!(order1.is_ok());
        assert!(order2.is_ok());

        // Cancel orders
        assert!(connector.cancel_order("ORD_001").await.is_ok());
        assert!(connector.cancel_order("ORD_002").await.is_ok());

        // Shutdown
        assert!(connector.shutdown().await.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_high_volume_orders() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        connector.initialize().await.unwrap();

        // Submit 100 orders
        for i in 0..100 {
            let result = connector.submit_order(&format!("ORD_{:04}", i)).await;
            assert!(result.is_ok());
        }

        connector.shutdown().await.unwrap();
    }

    #[tokio::test]
    async fn test_broker_connector_concurrent_operations() {
        let config = BrokerConnectorConfig::default();
        let connector = std::sync::Arc::new(BrokerConnector::new(config));

        let submit_handles: Vec<_> = (0..10)
            .map(|i| {
                let connector_clone = connector.clone();
                tokio::spawn(async move {
                    let _ = connector_clone.submit_order(&format!("ORD_{}", i)).await;
                })
            })
            .collect();

        let cancel_handles: Vec<_> = (0..10)
            .map(|i| {
                let connector_clone = connector.clone();
                tokio::spawn(async move {
                    let _ = connector_clone.cancel_order(&format!("ORD_{}", i)).await;
                })
            })
            .collect();

        let broker_handles: Vec<_> = (0..5)
            .map(|_| {
                let connector_clone = connector.clone();
                tokio::spawn(async move {
                    connector_clone.get_connected_brokers().await
                })
            })
            .collect();

        // All operations should succeed
        for handle in submit_handles {
            handle.await.unwrap();
        }
        for handle in cancel_handles {
            handle.await.unwrap();
        }
        for handle in broker_handles {
            let brokers = handle.await.unwrap();
            assert!(!brokers.is_empty());
        }
    }

    #[tokio::test]
    async fn test_broker_connector_stress_test() {
        let config = BrokerConnectorConfig::default();
        let connector = std::sync::Arc::new(BrokerConnector::new(config));

        // Simulate high concurrent load
        let mut handles = vec![];
        for i in 0..50 {
            let connector_clone = connector.clone();
            let handle = tokio::spawn(async move {
                match i % 3 {
                    0 => {
                        let _ = connector_clone.submit_order(&format!("ORD_{}", i)).await;
                    }
                    1 => {
                        let _ = connector_clone.cancel_order(&format!("ORD_{}", i)).await;
                    }
                    _ => {
                        connector_clone.get_connected_brokers().await;
                    }
                }
            });
            handles.push(handle);
        }

        for handle in handles {
            handle.await.unwrap();
        }
    }
}

// ============================================================================
// Edge Cases and Error Conditions
// ============================================================================

#[cfg(test)]
mod broker_connector_edge_cases {
    use super::*;

    #[tokio::test]
    async fn test_broker_connector_operations_before_init() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        // Operations should work even without explicit initialization
        assert!(connector.submit_order("ORD_123").await.is_ok());
        assert!(connector.cancel_order("ORD_123").await.is_ok());
        assert!(!connector.get_connected_brokers().await.is_empty());
    }

    #[tokio::test]
    async fn test_broker_connector_operations_after_shutdown() {
        let config = BrokerConnectorConfig::default();
        let mut connector = BrokerConnector::new(config);

        connector.initialize().await.unwrap();
        connector.shutdown().await.unwrap();

        // Operations should still work after shutdown (placeholder behavior)
        assert!(connector.submit_order("ORD_123").await.is_ok());
        assert!(connector.cancel_order("ORD_123").await.is_ok());
    }

    #[tokio::test]
    async fn test_broker_connector_unicode_order_ids() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let unicode_ids = vec![
            "ORD_日本語",
            "ORD_中文",
            "ORD_한글",
            "ORD_العربية",
        ];

        for order_id in unicode_ids {
            let submit_result = connector.submit_order(order_id).await;
            assert!(submit_result.is_ok(), "Failed for order_id: {}", order_id);

            let cancel_result = connector.cancel_order(order_id).await;
            assert!(cancel_result.is_ok(), "Failed to cancel: {}", order_id);
        }
    }

    #[tokio::test]
    async fn test_broker_connector_very_long_order_id() {
        let config = BrokerConnectorConfig::default();
        let connector = BrokerConnector::new(config);

        let long_id = "ORD_".to_string() + &"X".repeat(10000);

        let submit_result = connector.submit_order(&long_id).await;
        assert!(submit_result.is_ok());

        let cancel_result = connector.cancel_order(&long_id).await;
        assert!(cancel_result.is_ok());
    }
}