nt-napi-bindings 1.0.0

//! Broker integration bindings for Node.js
//!
//! Provides NAPI bindings for all broker integrations:
//! - Alpaca
//! - Interactive Brokers (IBKR)
//! - CCXT (multi-exchange crypto)
//! - Oanda
//! - Questrade
//! - Lime Trading

use napi::bindgen_prelude::*;
use napi_derive::napi;
use std::sync::Arc;
use tokio::sync::Mutex;

/// Broker configuration for connection
#[napi(object)]
pub struct BrokerConfig {
    pub broker_type: String,  // "alpaca", "ibkr", "ccxt", "oanda", "questrade", "lime"
    pub api_key: String,
    pub api_secret: String,
    pub base_url: Option<String>,
    pub paper_trading: bool,
    pub exchange: Option<String>,  // For CCXT
}

/// Order placement request
#[napi(object)]
pub struct OrderRequest {
    pub symbol: String,
    pub side: String,          // "buy" or "sell"
    pub order_type: String,    // "market", "limit", "stop", "stop_limit"
    pub quantity: f64,
    pub limit_price: Option<f64>,
    pub stop_price: Option<f64>,
    pub time_in_force: String, // "day", "gtc", "ioc", "fok"
}

/// Order response from broker
#[napi(object)]
pub struct OrderResponse {
    pub order_id: String,
    pub broker_order_id: String,
    pub status: String,        // "pending", "filled", "partial", "cancelled", "rejected"
    pub filled_quantity: f64,
    pub filled_price: Option<f64>,
    pub timestamp: String,
}

/// Account balance information
#[napi(object)]
pub struct AccountBalance {
    pub cash: f64,
    pub equity: f64,
    pub buying_power: f64,
    pub currency: String,
}

/// Broker client for executing trades
#[napi]
pub struct BrokerClient {
    config: Arc<BrokerConfig>,
    _connection: Arc<Mutex<Option<String>>>, // Placeholder for actual connection
}

#[napi]
impl BrokerClient {
    /// Create a new broker client
    #[napi(constructor)]
    pub fn new(config: BrokerConfig) -> Self {
        tracing::info!("Creating broker client for: {}", config.broker_type);

        Self {
            config: Arc::new(config),
            _connection: Arc::new(Mutex::new(None)),
        }
    }

    /// Connect to the broker
    #[napi]
    pub async fn connect(&self) -> Result<bool> {
        let broker_type = &self.config.broker_type;
        tracing::info!("Connecting to broker: {}", broker_type);

        // TODO: Implement actual broker connections using nt-execution crate
        // For now, simulate connection
        let mut conn = self._connection.lock().await;
        *conn = Some(format!("connected-{}", broker_type));

        Ok(true)
    }

    /// Disconnect from broker
    #[napi]
    pub async fn disconnect(&self) -> Result<()> {
        tracing::info!("Disconnecting from broker");

        let mut conn = self._connection.lock().await;
        *conn = None;

        Ok(())
    }

    /// Place an order
    #[napi]
    pub async fn place_order(&self, order: OrderRequest) -> Result<OrderResponse> {
        tracing::info!(
            "Placing order: {} {} {} @ {}",
            order.side,
            order.quantity,
            order.symbol,
            order.order_type
        );

        // TODO: Implement actual order placement via nt-execution
        // For now, return mock response
        Ok(OrderResponse {
            order_id: generate_uuid(),
            broker_order_id: format!("broker-{}", generate_uuid()),
            status: "pending".to_string(),
            filled_quantity: 0.0,
            filled_price: None,
            timestamp: chrono::Utc::now().to_rfc3339(),
        })
    }

    /// Cancel an order
    #[napi]
    pub async fn cancel_order(&self, order_id: String) -> Result<bool> {
        tracing::info!("Cancelling order: {}", order_id);

        // TODO: Implement actual order cancellation
        Ok(true)
    }

    /// Get order status
    #[napi]
    pub async fn get_order_status(&self, order_id: String) -> Result<OrderResponse> {
        tracing::debug!("Getting order status: {}", order_id);

        // TODO: Implement actual order status retrieval
        Ok(OrderResponse {
            order_id: order_id.clone(),
            broker_order_id: format!("broker-{}", order_id),
            status: "filled".to_string(),
            filled_quantity: 100.0,
            filled_price: Some(150.50),
            timestamp: chrono::Utc::now().to_rfc3339(),
        })
    }

    /// Get account balance
    #[napi]
    pub async fn get_account_balance(&self) -> Result<AccountBalance> {
        tracing::debug!("Getting account balance");

        // TODO: Implement actual balance retrieval from broker
        Ok(AccountBalance {
            cash: if self.config.paper_trading { 100000.0 } else { 0.0 },
            equity: if self.config.paper_trading { 100000.0 } else { 0.0 },
            buying_power: if self.config.paper_trading { 200000.0 } else { 0.0 },
            currency: "USD".to_string(),
        })
    }

    /// List all open orders
    #[napi]
    pub async fn list_orders(&self) -> Result<Vec<OrderResponse>> {
        tracing::debug!("Listing open orders");

        // TODO: Implement actual order listing
        Ok(vec![])
    }

    /// Get current positions
    #[napi]
    pub async fn get_positions(&self) -> Result<Vec<crate::JsPosition>> {
        tracing::debug!("Getting positions");

        // TODO: Implement actual position retrieval
        Ok(vec![])
    }
}

/// List all available broker types
#[napi]
pub fn list_broker_types() -> Vec<String> {
    vec![
        "alpaca".to_string(),
        "ibkr".to_string(),
        "ccxt".to_string(),
        "oanda".to_string(),
        "questrade".to_string(),
        "lime".to_string(),
    ]
}

/// Validate broker configuration
#[napi]
pub fn validate_broker_config(config: BrokerConfig) -> Result<bool> {
    let valid_types = list_broker_types();

    if !valid_types.contains(&config.broker_type) {
        return Err(Error::from_reason(format!(
            "Invalid broker type: {}. Valid types: {:?}",
            config.broker_type, valid_types
        )));
    }

    if config.api_key.is_empty() {
        return Err(Error::from_reason("API key is required"));
    }

    if config.api_secret.is_empty() {
        return Err(Error::from_reason("API secret is required"));
    }

    if config.broker_type == "ccxt" && config.exchange.is_none() {
        return Err(Error::from_reason("Exchange is required for CCXT broker"));
    }

    Ok(true)
}

// UUID generation helper
fn generate_uuid() -> String {
    use std::time::{SystemTime, UNIX_EPOCH};
    let nanos = SystemTime::now()
        .duration_since(UNIX_EPOCH)
        .unwrap()
        .as_nanos();
    format!("{:x}", nanos)
}