#pragma once

// ==============================================================================
// C ABI bridge between the C++ protocol stack and the Swift app layer
// ==============================================================================
// This header is imported into Swift via -import-objc-header, so it must stay
// pure C (no C++ types). The C++ modules implement these entry points.
// ==============================================================================

#include <stdbool.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

// Human-readable version string of the protocol stack.
const char *xone_version(void);

// TRUE if an Xbox Wireless Dongle is connected, FALSE otherwise.
bool xone_dongle_present(void);

// Opaque handle to an open dongle session. Create with xone_open(); only one
// session may be open at a time. The getters are safe to call from any thread.
typedef struct xone_dongle xone_dongle;

// Session states reported by xone_state().
enum {
    XONE_STATE_IDLE = 0,     // Probed; no firmware loaded yet
    XONE_STATE_STARTING,     // Firmware load + radio init in progress
    XONE_STATE_READY,        // Radio initialized
    XONE_STATE_ERROR         // Last operation failed (see xone_error)
};

// Open a dongle session: probe and USB reset. Fast; returns NULL if no dongle
// is present or opening fails. The EFUSE getters (xone_pid/xone_chip_id/
// xone_mac_address) are valid immediately after this.
xone_dongle *xone_open(void);

// Kick off firmware load + radio init on a background thread. Non-blocking:
// returns 0 once started, -1 if the session is busy or already ready. If
// firmware_path is NULL, the image is selected per product ID
// (firmware/xone_dongle_<pid>.bin).
int xone_start(xone_dongle *d, const char *firmware_path);

// Close the session and release the dongle. Waits for any in-progress start.
void xone_close(xone_dongle *d);

// Current session state (XONE_STATE_*).
int xone_state(const xone_dongle *d);

// Human-readable error from the last failed operation. Empty string if none.
const char *xone_error(const xone_dongle *d);

// Product ID of the connected dongle (e.g. 0x02E6).
uint16_t xone_pid(const xone_dongle *d);

// Chip ID from EFUSE (e.g. 0x7612 for MT7612). 0 if unknown.
uint16_t xone_chip_id(const xone_dongle *d);

// MAC address from EFUSE as "xx:xx:xx:xx:xx:xx". Valid until xone_close().
const char *xone_mac_address(const xone_dongle *d);

// Build string of the loaded firmware image (e.g. "201703281033____").
// Empty string if the firmware was not loaded. Valid until xone_close().
const char *xone_firmware_build(const xone_dongle *d);

#ifdef __cplusplus
}
#endif