//! ICMarkets FIX 4.4 Integration Demo
//!
//! This example demonstrates how to use the ICMarkets FIX client for high-frequency trading

use std::time::Duration;
use tokio::sync::mpsc;
use tracing::{error, info};
use trading_engine::brokers::{config::ICMarketsConfig, ICMarketsClient};
use trading_engine::prelude::{Side, TradingOrder};
use trading_engine::trading::data_interface::{BrokerInterface, ExecutionReport};
use trading_engine::trading_operations::OrderType;
use uuid::Uuid;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    // Initialize logging
    tracing::subscriber::set_global_default(
        tracing_subscriber::fmt().with_env_filter("info").finish(),
    )
    .expect("Failed to set subscriber");

    // Note: tracing_subscriber added to dev-dependencies for examples

    info!("Starting ICMarkets FIX 4.4 integration demo");

    // Configure ICMarkets connection
    let config = ICMarketsConfig {
        enabled: true,
        fix_endpoint: "fix-demo.icmarkets.com".to_string(),
        fix_port: 9880,
        sender_comp_id: "DEMO_CLIENT".to_string(),
        target_comp_id: "ICMARKETS".to_string(),
        rest_base_url: "https://api-demo.icmarkets.com".to_string(),
        rate_limit_per_minute: 60,
        username: Some("demo_user".to_string()),
        password: std::env::var("FOXHUNT_IC_PASSWORD")
            .ok()
            .or_else(|| std::env::var("IC_PASSWORD").ok()),
        account_id: Some("DEMO_ACCOUNT".to_string()),
    };

    // Create FIX client
    let mut client = ICMarketsClient::new(config);

    // Set up execution report callback
    let mut exec_rx = client.subscribe_executions().await?;

    // Start execution report handler
    tokio::spawn(async move {
        while let Some(execution) = exec_rx.recv().await {
            info!(
                "🎯 Execution Report: {} {} {} @ ${:.4}",
                execution.symbol,
                execution.filled_quantity,
                match execution.side {
                    OrderSide::Buy => "BUY",
                    OrderSide::Sell => "SELL",
                },
                execution.average_price.map(|p| p.to_f64()).unwrap_or(0.0)
            );
        }
    });

    // Connect to ICMarkets
    info!("🔌 Connecting to ICMarkets FIX server...");
    if let Err(e) = client.connect().await {
        error!("❌ Failed to connect: {}", e);
        return Err(Box::new(e) as Box<dyn std::error::Error + Send + Sync>);
    }

    info!("✅ Connected successfully!");

    // Wait for session to be established
    tokio::time::sleep(Duration::from_secs(2)).await;

    // Demo trading operations
    if let Err(e) = demo_trading_operations(&client).await {
        error!("❌ Trading operations failed: {}", e);
        return Err(e);
    }

    // Keep running for a while to receive messages
    info!("⏳ Running for 30 seconds to demonstrate message handling...");
    tokio::time::sleep(Duration::from_secs(30)).await;

    // Disconnect
    info!("🔌 Disconnecting...");
    info!("✅ Connected successfully!");

    // Wait for session to be established
    tokio::time::sleep(Duration::from_secs(2)).await;

    // Demo trading operations
    demo_trading_operations(&client).await?;

    // Keep running for a while to receive messages
    info!("⏳ Running for 30 seconds to demonstrate message handling...");
    tokio::time::sleep(Duration::from_secs(30)).await;

    // Disconnect
    info!("🔌 Disconnecting...");
    client
        .disconnect()
        .await
        .map_err(|e| Box::new(e) as Box<dyn std::error::Error + Send + Sync>)?;

    info!("✅ Demo completed successfully!");
    Ok(())
}

async fn demo_trading_operations(
    client: &ICMarketsClient,
) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
    info!("🎯 Starting trading operations demo");

    // Example 1: Market Buy Order
    info!("📈 Submitting market buy order for EUR/USD");
    let market_buy_order = TradingOrder {
        id: format!("MKT_BUY_{}", Uuid::new_v4().simple()),
        symbol: "EURUSD".to_string(),
        side: Side::Buy,
        order_type: OrderType::Market,
        quantity: Decimal::new(10000, 0), // 10k units
        price: Decimal::ZERO,
        time_in_force: core::trading_operations::TimeInForce::ImmediateOrCancel,
        metadata: std::collections::HashMap::new(),
        created_at: chrono::Utc::now(),
        submitted_at: None,
        executed_at: None,
        status: core::trading_operations::OrderStatus::Created,
        fill_quantity: Decimal::ZERO,
        average_fill_price: None,
    };

    let order_id1 = client.submit_order(&market_buy_order).await?;
    info!("✅ Market buy order submitted: {}", order_id1);

    // Wait a bit
    tokio::time::sleep(Duration::from_millis(500)).await;

    // Example 2: Limit Sell Order
    info!("📉 Submitting limit sell order for EUR/USD");
    let limit_sell_order = TradingOrder {
        id: format!("LMT_SELL_{}", Uuid::new_v4().simple()),
        symbol: "EURUSD".to_string(),
        side: Side::Sell,
        order_type: OrderType::Limit,
        quantity: Decimal::new(15000, 0), // 15k units
        price: Decimal::new(10950, 4),    // 1.0950 limit price
        time_in_force: core::trading_operations::TimeInForce::GoodTillCancel,
        metadata: std::collections::HashMap::new(),
        created_at: chrono::Utc::now(),
        submitted_at: None,
        executed_at: None,
        status: core::trading_operations::OrderStatus::Created,
        fill_quantity: rust_decimal::Decimal::ZERO,
        average_fill_price: None,
    };

    let order_id2 = client.submit_order(&limit_sell_order).await?;
    info!("✅ Limit sell order submitted: {}", order_id2);

    // Wait a bit
    tokio::time::sleep(Duration::from_millis(500)).await;

    // Example 3: Stop Loss Order
    info!("🛑 Submitting stop loss order for EUR/USD");
    let stop_order = TradingOrder {
        id: format!("STOP_{}", Uuid::new_v4().simple()),
        symbol: "EURUSD".to_string(),
        side: Side::Sell,
        order_type: OrderType::Stop,
        quantity: Decimal::new(10000, 0),
        price: Decimal::new(10800, 4), // 1.0800 stop price
        time_in_force: core::trading_operations::TimeInForce::GoodTillCancel,
        metadata: std::collections::HashMap::new(),
        created_at: chrono::Utc::now(),
        submitted_at: None,
        executed_at: None,
        status: core::trading_operations::OrderStatus::Created,
        fill_quantity: rust_decimal::Decimal::ZERO,
        average_fill_price: None,
    };

    let order_id3 = client.submit_order(&stop_order).await?;
    info!("✅ Stop loss order submitted: {}", order_id3);

    // Wait a bit
    tokio::time::sleep(Duration::from_secs(1)).await;

    // Example 4: Cancel an order
    info!("❌ Cancelling limit sell order");
    client.cancel_order(&order_id2).await?;
    info!("✅ Cancel request submitted for order: {}", order_id2);

    // Check order statuses
    tokio::time::sleep(Duration::from_millis(500)).await;

    match client.get_order_status(&order_id1).await {
        Ok(status) => info!("📊 Order {} status: {:?}", order_id1, status),
        Err(e) => error!("Failed to get status for order {}: {}", order_id1, e),
    }

    match client.get_order_status(&order_id2).await {
        Ok(status) => info!("📊 Order {} status: {:?}", order_id2, status),
        Err(e) => error!("Failed to get status for order {}: {}", order_id2, e),
    }

    match client.get_order_status(&order_id3).await {
        Ok(status) => info!("📊 Order {} status: {:?}", order_id3, status),
        Err(e) => error!("Failed to get status for order {}: {}", order_id3, e),
    }

    // Example 5: Multiple Currency Pairs
    info!("🌍 Submitting orders for multiple currency pairs");

    let pairs = vec![
        ("GBPUSD", 1.2650, 8000.0),
        ("USDJPY", 149.50, 1000000.0),
        ("USDCHF", 0.8950, 12000.0),
        ("AUDUSD", 0.6750, 15000.0),
    ];

    for (symbol, price, qty) in pairs {
        let order = TradingOrder {
            id: format!("MULTI_{}_{}", symbol, Uuid::new_v4().simple()),
            symbol: symbol.to_string(),
            side: Side::Buy,
            order_type: OrderType::Limit,
            quantity: Decimal::new((qty * 10000.0) as i64, 4), // Convert to decimal
            price: Decimal::new((price * 10000.0) as i64, 4),  // Convert to decimal
            time_in_force: core::trading_operations::TimeInForce::GoodTillCancel,
            metadata: std::collections::HashMap::new(),
            created_at: chrono::Utc::now(),
            submitted_at: None,
            executed_at: None,
            status: core::trading_operations::OrderStatus::Created,
            fill_quantity: Decimal::ZERO,
            average_fill_price: None,
        };

        match client.submit_order(&order).await {
            Ok(order_id) => info!("✅ {} order submitted: {}", symbol, order_id),
            Err(e) => error!("❌ Failed to submit {} order: {}", symbol, e),
        }

        // Small delay between orders to avoid overwhelming the server
        tokio::time::sleep(Duration::from_millis(100)).await;
    }

    info!("🎯 Trading operations demo completed");
    Ok(())
}

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

    #[test]
    fn test_config_creation() {
        let config = ICMarketsConfig {
            enabled: true,
            fix_endpoint: "fix-demo.icmarkets.com".to_string(),
            fix_port: 9880,
            sender_comp_id: "DEMO_CLIENT".to_string(),
            target_comp_id: "ICMARKETS".to_string(),
            rest_base_url: "https://api-demo.icmarkets.com".to_string(),
            rate_limit_per_minute: 60,
            username: Some("demo_user".to_string()),
            password: std::env::var("FOXHUNT_IC_PASSWORD")
                .ok()
                .or_else(|| std::env::var("IC_PASSWORD").ok()),
            account_id: Some("DEMO_ACCOUNT".to_string()),
        };
        assert_eq!(config.fix_endpoint, "fix-demo.icmarkets.com");
        assert_eq!(config.fix_port, 9880);
        assert!(config.enabled);
    }

    #[test]
    fn test_order_creation() {
        let order = TradingOrder {
            id: "TEST_ORDER_001".to_string(),
            symbol: "EURUSD".to_string(),
            side: Side::Buy,
            order_type: OrderType::Limit,
            quantity: Decimal::new(10000, 0),
            price: Decimal::new(10900, 4), // 1.0900
            time_in_force: core::trading_operations::TimeInForce::GoodTillCancel,
            metadata: std::collections::HashMap::new(),
            created_at: chrono::Utc::now(),
            submitted_at: None,
            executed_at: None,
            status: core::trading_operations::OrderStatus::Created,
            fill_quantity: Decimal::ZERO,
            average_fill_price: None,
        };

        assert_eq!(order.symbol, "EURUSD");
        assert_eq!(order.quantity, Decimal::new(10000, 0));
        assert_eq!(order.price, Decimal::new(10900, 4));
    }

    #[tokio::test]
    async fn test_client_creation() {
        let config = ICMarketsConfig {
            enabled: true,
            fix_endpoint: "fix-demo.icmarkets.com".to_string(),
            fix_port: 9880,
            sender_comp_id: "DEMO_CLIENT".to_string(),
            target_comp_id: "ICMARKETS".to_string(),
            rest_base_url: "https://api-demo.icmarkets.com".to_string(),
            rate_limit_per_minute: 60,
            username: Some("demo_user".to_string()),
            password: std::env::var("FOXHUNT_IC_PASSWORD")
                .ok()
                .or_else(|| std::env::var("IC_PASSWORD").ok()),
            account_id: Some("DEMO_ACCOUNT".to_string()),
        };
        let client = ICMarketsClient::new(config);

        // Client should be created successfully
        // Note: Cannot access internal config directly, test creation succeeds
    }
}