//go:build cgo
// +build cgo

package orderbook

/*
#include <stdlib.h>
// Placeholder for C++ order book implementation
void* create_orderbook() { return NULL; }
void destroy_orderbook(void* ob) {}
int place_order(void* ob, uint64_t id, int type, int side, double price, double quantity) { return 0; }
int cancel_order(void* ob, uint64_t id) { return 0; }
*/
import "C"
import (
	"unsafe"
)

// NewCppOrderBook creates a C++ implementation of the order book
func NewCppOrderBook(cfg Config) OrderBook {
	return &cppOrderBook{
		ptr: C.create_orderbook(),
	}
}

type cppOrderBook struct {
	ptr unsafe.Pointer
}

func (c *cppOrderBook) AddOrder(order *Order) uint64 {
	if c.ptr == nil {
		return 0
	}
	C.place_order(c.ptr, C.uint64_t(order.ID),
		C.int(order.Type), C.int(order.Side),
		C.double(order.Price), C.double(order.Quantity))
	return order.ID
}

func (c *cppOrderBook) CancelOrder(orderID uint64) bool {
	if c.ptr == nil {
		return false
	}
	result := C.cancel_order(c.ptr, C.uint64_t(orderID))
	return result == 0
}

func (c *cppOrderBook) ModifyOrder(orderID uint64, newPrice, newQuantity float64) bool {
	// Placeholder implementation
	return false
}

func (c *cppOrderBook) MatchOrders() []Trade {
	// Placeholder implementation
	return []Trade{}
}

func (c *cppOrderBook) GetBestBid() float64 {
	// Placeholder implementation
	return 0
}

func (c *cppOrderBook) GetBestAsk() float64 {
	// Placeholder implementation
	return 0
}

func (c *cppOrderBook) GetDepth(level int) *Depth {
	// Placeholder implementation
	return &Depth{
		Bids: []PriceLevel{},
		Asks: []PriceLevel{},
	}
}

func (c *cppOrderBook) GetVolume() uint64 {
	// Placeholder implementation
	return 0
}