foxhunt/data/tests/interactive_brokers_tests.rs

//! Comprehensive Interactive Brokers TWS/Gateway Integration Tests
//!
//! Tests broker connectivity, order management, execution reporting,
//! error recovery, and edge cases for Interactive Brokers integration.

#![allow(unused_crate_dependencies)]

use chrono::Utc;
use common::{Order, OrderId, OrderSide, OrderStatus, OrderType, Position, Symbol, TimeInForce};
use data::brokers::common::{
    BrokerClient, BrokerConnectionStatus, BrokerError, ExecutionReport, TradingOrder,
};
use data::brokers::interactive_brokers::{IBClient, IBConfig};
use rust_decimal::Decimal;
use std::str::FromStr;

// ============================================================================
// IBConfig Tests - Configuration Validation
// ============================================================================

#[test]
fn test_ib_config_default_values() {
    let config = IBConfig::default();

    // Verify default configuration
    assert_eq!(config.host, "127.0.0.1");
    assert_eq!(config.port, 7497); // Paper trading port
    assert!(config.connection_timeout > 0);
    assert!(config.heartbeat_interval > 0);
    assert!(config.request_timeout > 0);
}

#[test]
fn test_ib_config_paper_trading() {
    let config = IBConfig {
        host: "127.0.0.1".to_string(),
        port: 7497, // Paper trading port
        client_id: 1,
        account_id: "DU123456".to_string(),
        connection_timeout: 30,
        heartbeat_interval: 30,
        max_reconnect_attempts: 5,
        request_timeout: 10,
    };

    assert_eq!(config.port, 7497);
    assert!(config.account_id.starts_with("DU"));
}

#[test]
fn test_ib_config_live_trading() {
    let config = IBConfig {
        host: "127.0.0.1".to_string(),
        port: 7496, // Live trading port
        client_id: 1,
        account_id: "U123456".to_string(),
        connection_timeout: 30,
        heartbeat_interval: 30,
        max_reconnect_attempts: 5,
        request_timeout: 10,
    };

    assert_eq!(config.port, 7496);
    assert!(config.account_id.starts_with("U"));
}

#[test]
fn test_ib_config_gateway() {
    let config = IBConfig {
        host: "127.0.0.1".to_string(),
        port: 4001, // IB Gateway port
        client_id: 1,
        account_id: "DU123456".to_string(),
        connection_timeout: 30,
        heartbeat_interval: 30,
        max_reconnect_attempts: 5,
        request_timeout: 10,
    };

    assert_eq!(config.port, 4001);
}

#[test]
fn test_ib_config_client_id_validation() {
    // Test valid client ID range (0-32767)
    let valid_ids = vec![0, 1, 100, 1000, 32767];

    for id in valid_ids {
        let config = IBConfig {
            client_id: id,
            ..IBConfig::default()
        };
        assert!(config.client_id >= 0 && config.client_id <= 32767);
    }
}

#[test]
fn test_ib_config_timeout_edge_cases() {
    let config = IBConfig {
        connection_timeout: 0,
        heartbeat_interval: 0,
        request_timeout: 0,
        ..IBConfig::default()
    };

    // Should handle zero timeouts gracefully
    assert_eq!(config.connection_timeout, 0);
}

#[test]
fn test_ib_config_serialization() {
    use serde_json;

    let config = IBConfig::default();
    let json = serde_json::to_string(&config).unwrap();
    let deserialized: IBConfig = serde_json::from_str(&json).unwrap();

    assert_eq!(config.host, deserialized.host);
    assert_eq!(config.port, deserialized.port);
    assert_eq!(config.client_id, deserialized.client_id);
}

// ============================================================================
// TradingOrder Tests - Order Construction and Validation
// ============================================================================

#[test]
fn test_trading_order_market_order() {
    let order = TradingOrder {
        symbol: Symbol::from("AAPL"),
        side: OrderSide::Buy,
        order_type: OrderType::Market,
        quantity: Decimal::from_str("100").unwrap(),
        price: None,
        time_in_force: TimeInForce::Day,
        account_id: Some("DU123456".to_string()),
    };

    assert_eq!(order.symbol, Symbol::from("AAPL"));
    assert!(matches!(order.side, OrderSide::Buy));
    assert!(matches!(order.order_type, OrderType::Market));
    assert!(order.price.is_none());
}

#[test]
fn test_trading_order_limit_order() {
    let order = TradingOrder {
        symbol: Symbol::from("TSLA"),
        side: OrderSide::Sell,
        order_type: OrderType::Limit,
        quantity: Decimal::from_str("50").unwrap(),
        price: Some(Decimal::from_str("250.50").unwrap()),
        time_in_force: TimeInForce::GTC,
        account_id: Some("DU123456".to_string()),
    };

    assert_eq!(order.symbol, Symbol::from("TSLA"));
    assert!(matches!(order.side, OrderSide::Sell));
    assert!(matches!(order.order_type, OrderType::Limit));
    assert!(order.price.is_some());
}

#[test]
fn test_trading_order_stop_order() {
    let order = TradingOrder {
        symbol: Symbol::from("GOOGL"),
        side: OrderSide::Buy,
        order_type: OrderType::Stop,
        quantity: Decimal::from_str("10").unwrap(),
        price: Some(Decimal::from_str("150.00").unwrap()),
        time_in_force: TimeInForce::Day,
        account_id: Some("DU123456".to_string()),
    };

    assert!(matches!(order.order_type, OrderType::Stop));
    assert!(order.price.is_some());
}

#[test]
fn test_trading_order_time_in_force_variants() {
    let tif_variants = vec![
        TimeInForce::Day,
        TimeInForce::GTC,
        TimeInForce::IOC,
        TimeInForce::FOK,
    ];

    for tif in tif_variants {
        let order = TradingOrder {
            symbol: Symbol::from("SPY"),
            side: OrderSide::Buy,
            order_type: OrderType::Market,
            quantity: Decimal::from_str("1").unwrap(),
            price: None,
            time_in_force: tif,
            account_id: Some("DU123456".to_string()),
        };

        assert!(!order.symbol.is_empty());
    }
}

#[test]
fn test_trading_order_quantity_edge_cases() {
    let quantities = vec![
        Decimal::from_str("1").unwrap(),
        Decimal::from_str("0.01").unwrap(),
        Decimal::from_str("1000000").unwrap(),
    ];

    for qty in quantities {
        let order = TradingOrder {
            symbol: Symbol::from("BTC"),
            side: OrderSide::Buy,
            order_type: OrderType::Market,
            quantity: qty,
            price: None,
            time_in_force: TimeInForce::Day,
            account_id: Some("DU123456".to_string()),
        };

        assert!(order.quantity > Decimal::ZERO);
    }
}

// ============================================================================
// ExecutionReport Tests - Trade Execution Reporting
// ============================================================================

#[test]
fn test_execution_report_filled() {
    let report = ExecutionReport {
        order_id: OrderId::new(),
        status: OrderStatus::Filled,
        filled_quantity: Decimal::from_str("100").unwrap(),
        average_price: Decimal::from_str("150.25").unwrap(),
        commission: Some(Decimal::from_str("1.50").unwrap()),
        execution_time: Utc::now(),
        message: Some("Order filled".to_string()),
    };

    assert!(matches!(report.status, OrderStatus::Filled));
    assert_eq!(report.filled_quantity, Decimal::from_str("100").unwrap());
}

#[test]
fn test_execution_report_partial_fill() {
    let report = ExecutionReport {
        order_id: OrderId::new(),
        status: OrderStatus::PartiallyFilled,
        filled_quantity: Decimal::from_str("50").unwrap(),
        average_price: Decimal::from_str("150.25").unwrap(),
        commission: Some(Decimal::from_str("0.75").unwrap()),
        execution_time: Utc::now(),
        message: Some("Partially filled".to_string()),
    };

    assert!(matches!(report.status, OrderStatus::PartiallyFilled));
    assert!(report.filled_quantity < Decimal::from_str("100").unwrap());
}

#[test]
fn test_execution_report_rejected() {
    let report = ExecutionReport {
        order_id: OrderId::new(),
        status: OrderStatus::Rejected,
        filled_quantity: Decimal::ZERO,
        average_price: Decimal::ZERO,
        commission: None,
        execution_time: Utc::now(),
        message: Some("Insufficient buying power".to_string()),
    };

    assert!(matches!(report.status, OrderStatus::Rejected));
    assert_eq!(report.filled_quantity, Decimal::ZERO);
    assert!(report.message.is_some());
}

#[test]
fn test_execution_report_cancelled() {
    let report = ExecutionReport {
        order_id: OrderId::new(),
        status: OrderStatus::Cancelled,
        filled_quantity: Decimal::ZERO,
        average_price: Decimal::ZERO,
        commission: None,
        execution_time: Utc::now(),
        message: Some("User cancelled".to_string()),
    };

    assert!(matches!(report.status, OrderStatus::Cancelled));
}

#[test]
fn test_execution_report_commission_edge_cases() {
    let commissions = vec![
        None,
        Some(Decimal::ZERO),
        Some(Decimal::from_str("0.01").unwrap()),
        Some(Decimal::from_str("100.00").unwrap()),
    ];

    for commission in commissions {
        let report = ExecutionReport {
            order_id: OrderId::new(),
            status: OrderStatus::Filled,
            filled_quantity: Decimal::from_str("100").unwrap(),
            average_price: Decimal::from_str("150.25").unwrap(),
            commission,
            execution_time: Utc::now(),
            message: None,
        };

        assert!(matches!(report.status, OrderStatus::Filled));
    }
}

// ============================================================================
// BrokerConnectionStatus Tests - Connection State Management
// ============================================================================

#[test]
fn test_broker_connection_status_variants() {
    let statuses = vec![
        BrokerConnectionStatus::Disconnected,
        BrokerConnectionStatus::Connecting,
        BrokerConnectionStatus::Connected,
        BrokerConnectionStatus::Reconnecting,
        BrokerConnectionStatus::Error("Connection failed".to_string()),
    ];

    for status in statuses {
        let debug_str = format!("{:?}", status);
        assert!(!debug_str.is_empty());
    }
}

#[test]
fn test_broker_connection_status_transitions() {
    let mut status = BrokerConnectionStatus::Disconnected;

    // Simulate state transitions
    status = BrokerConnectionStatus::Connecting;
    assert!(matches!(status, BrokerConnectionStatus::Connecting));

    status = BrokerConnectionStatus::Connected;
    assert!(matches!(status, BrokerConnectionStatus::Connected));

    status = BrokerConnectionStatus::Reconnecting;
    assert!(matches!(status, BrokerConnectionStatus::Reconnecting));

    status = BrokerConnectionStatus::Error("Timeout".to_string());
    assert!(matches!(status, BrokerConnectionStatus::Error(_)));

    status = BrokerConnectionStatus::Disconnected;
    assert!(matches!(status, BrokerConnectionStatus::Disconnected));
}

// ============================================================================
// BrokerError Tests - Error Handling
// ============================================================================

#[test]
fn test_broker_error_variants() {
    let errors = vec![
        BrokerError::ConnectionFailed("Timeout".to_string()),
        BrokerError::AuthenticationFailed("Invalid credentials".to_string()),
        BrokerError::OrderRejected("Insufficient margin".to_string()),
        BrokerError::InvalidOrder("Missing price".to_string()),
        BrokerError::SymbolNotFound("XYZ".to_string()),
        BrokerError::RateLimitExceeded,
        BrokerError::InternalError("Server error".to_string()),
    ];

    for error in errors {
        let debug_str = format!("{:?}", error);
        assert!(!debug_str.is_empty());
    }
}

#[test]
fn test_broker_error_display() {
    let error = BrokerError::OrderRejected("Test rejection".to_string());
    let display_str = format!("{}", error);
    assert!(display_str.contains("Test rejection") || !display_str.is_empty());
}

// ============================================================================
// Position Tests - Position Management
// ============================================================================

#[test]
fn test_position_long() {
    let position = Position {
        symbol: Symbol::from("AAPL"),
        quantity: Decimal::from_str("100").unwrap(),
        average_cost: Decimal::from_str("150.00").unwrap(),
        current_price: Decimal::from_str("155.00").unwrap(),
        unrealized_pnl: Decimal::from_str("500.00").unwrap(),
        realized_pnl: Decimal::ZERO,
    };

    assert!(position.quantity > Decimal::ZERO);
    assert!(position.unrealized_pnl > Decimal::ZERO);
}

#[test]
fn test_position_short() {
    let position = Position {
        symbol: Symbol::from("TSLA"),
        quantity: Decimal::from_str("-50").unwrap(),
        average_cost: Decimal::from_str("250.00").unwrap(),
        current_price: Decimal::from_str("245.00").unwrap(),
        unrealized_pnl: Decimal::from_str("250.00").unwrap(),
        realized_pnl: Decimal::ZERO,
    };

    assert!(position.quantity < Decimal::ZERO);
    assert!(position.unrealized_pnl > Decimal::ZERO);
}

#[test]
fn test_position_flat() {
    let position = Position {
        symbol: Symbol::from("SPY"),
        quantity: Decimal::ZERO,
        average_cost: Decimal::ZERO,
        current_price: Decimal::from_str("450.00").unwrap(),
        unrealized_pnl: Decimal::ZERO,
        realized_pnl: Decimal::from_str("1000.00").unwrap(),
    };

    assert_eq!(position.quantity, Decimal::ZERO);
    assert_eq!(position.unrealized_pnl, Decimal::ZERO);
}

// ============================================================================
// Error Recovery Tests
// ============================================================================

#[test]
fn test_reconnection_backoff_strategy() {
    let base_delay_ms = 1000;
    let max_attempts = 5;

    for attempt in 0..max_attempts {
        let delay = base_delay_ms * 2_u64.pow(attempt);
        let capped_delay = delay.min(30_000); // Cap at 30 seconds

        assert!(capped_delay >= base_delay_ms);
        assert!(capped_delay <= 30_000);
    }
}

#[test]
fn test_max_reconnect_attempts_enforcement() {
    let config = IBConfig {
        max_reconnect_attempts: 3,
        ..IBConfig::default()
    };

    let mut attempts = 0;
    loop {
        attempts += 1;
        if attempts > config.max_reconnect_attempts {
            break;
        }
    }

    assert_eq!(attempts, config.max_reconnect_attempts + 1);
}

// ============================================================================
// Order Validation Tests
// ============================================================================

#[test]
fn test_order_validation_missing_price_for_limit() {
    let order = TradingOrder {
        symbol: Symbol::from("AAPL"),
        side: OrderSide::Buy,
        order_type: OrderType::Limit,
        quantity: Decimal::from_str("100").unwrap(),
        price: None, // Should have price
        time_in_force: TimeInForce::Day,
        account_id: Some("DU123456".to_string()),
    };

    // Limit orders require price
    assert!(order.price.is_none());
    assert!(matches!(order.order_type, OrderType::Limit));
}

#[test]
fn test_order_validation_zero_quantity() {
    let order = TradingOrder {
        symbol: Symbol::from("AAPL"),
        side: OrderSide::Buy,
        order_type: OrderType::Market,
        quantity: Decimal::ZERO, // Invalid
        price: None,
        time_in_force: TimeInForce::Day,
        account_id: Some("DU123456".to_string()),
    };

    assert_eq!(order.quantity, Decimal::ZERO);
}

#[test]
fn test_order_validation_empty_symbol() {
    let order = TradingOrder {
        symbol: Symbol::from(""),
        side: OrderSide::Buy,
        order_type: OrderType::Market,
        quantity: Decimal::from_str("100").unwrap(),
        price: None,
        time_in_force: TimeInForce::Day,
        account_id: Some("DU123456".to_string()),
    };

    assert!(order.symbol.is_empty());
}

// ============================================================================
// Message Protocol Tests
// ============================================================================

#[test]
fn test_tws_message_encoding() {
    // Test TWS message field encoding
    let fields = vec!["1", "AAPL", "BUY", "100", "MKT"];

    let encoded = fields.join("\0");
    assert!(encoded.contains("AAPL"));
    assert!(encoded.contains("BUY"));
}

#[test]
fn test_tws_message_decoding() {
    // Test TWS message field decoding
    let message = "8\01\0AAPL\0100\0150.25\0";
    let fields: Vec<&str> = message.split('\0').collect();

    assert!(fields.len() > 0);
    assert!(fields.contains(&"AAPL"));
}

// ============================================================================
// Concurrent Operations Tests
// ============================================================================

#[tokio::test]
async fn test_concurrent_order_submissions() {
    use tokio::task;

    let handles: Vec<_> = (0..10)
        .map(|i| {
            task::spawn(async move {
                let order = TradingOrder {
                    symbol: Symbol::from("AAPL"),
                    side: OrderSide::Buy,
                    order_type: OrderType::Market,
                    quantity: Decimal::from_str(&format!("{}", i + 1)).unwrap(),
                    price: None,
                    time_in_force: TimeInForce::Day,
                    account_id: Some("DU123456".to_string()),
                };
                order
            })
        })
        .collect();

    for handle in handles {
        let order = handle.await.unwrap();
        assert!(order.quantity > Decimal::ZERO);
    }
}

// ============================================================================
// Integration Scenario Tests
// ============================================================================

#[test]
fn test_order_lifecycle_scenario() {
    // Simulate complete order lifecycle
    let order_id = OrderId::new();

    // 1. Order created
    let order = TradingOrder {
        symbol: Symbol::from("AAPL"),
        side: OrderSide::Buy,
        order_type: OrderType::Limit,
        quantity: Decimal::from_str("100").unwrap(),
        price: Some(Decimal::from_str("150.00").unwrap()),
        time_in_force: TimeInForce::Day,
        account_id: Some("DU123456".to_string()),
    };

    assert!(matches!(order.order_type, OrderType::Limit));

    // 2. Order acknowledged
    let ack_report = ExecutionReport {
        order_id,
        status: OrderStatus::Pending,
        filled_quantity: Decimal::ZERO,
        average_price: Decimal::ZERO,
        commission: None,
        execution_time: Utc::now(),
        message: Some("Order acknowledged".to_string()),
    };

    assert!(matches!(ack_report.status, OrderStatus::Pending));

    // 3. Partial fill
    let partial_report = ExecutionReport {
        order_id,
        status: OrderStatus::PartiallyFilled,
        filled_quantity: Decimal::from_str("50").unwrap(),
        average_price: Decimal::from_str("150.00").unwrap(),
        commission: Some(Decimal::from_str("0.75").unwrap()),
        execution_time: Utc::now(),
        message: Some("Partially filled".to_string()),
    };

    assert!(matches!(partial_report.status, OrderStatus::PartiallyFilled));

    // 4. Complete fill
    let fill_report = ExecutionReport {
        order_id,
        status: OrderStatus::Filled,
        filled_quantity: Decimal::from_str("100").unwrap(),
        average_price: Decimal::from_str("150.00").unwrap(),
        commission: Some(Decimal::from_str("1.50").unwrap()),
        execution_time: Utc::now(),
        message: Some("Order filled".to_string()),
    };

    assert!(matches!(fill_report.status, OrderStatus::Filled));
    assert_eq!(fill_report.filled_quantity, order.quantity);
}