/*
 * Azeron Linux Configuration Library - Internal Header
 * Copyright (C) 2024 Azeron Linux Project
 *
 * SPDX-License-Identifier: MIT
 */

#ifndef AZERON_INTERNAL_H
#define AZERON_INTERNAL_H

#include "azeron.h"
#include <libusb-1.0/libusb.h>
#include <pthread.h>
#include <stdio.h>

#define AZERON_USB_TIMEOUT 1000
#define AZERON_MAX_STRING_LENGTH 256

/* Debug logging */
#ifdef AZERON_DEBUG
#define AZERON_LOG(fmt, ...) fprintf(stderr, "[AZERON] " fmt "\n", ##__VA_ARGS__)
#else
#define AZERON_LOG(fmt, ...) do {} while (0)
#endif

/* Error logging */
#define AZERON_ERROR(fmt, ...) fprintf(stderr, "[AZERON ERROR] " fmt "\n", ##__VA_ARGS__)

/* Device structure */
struct azeron_device {
    libusb_device_handle *handle;
    libusb_context *context;
    struct azeron_device_info info;
    pthread_mutex_t mutex;
    bool claimed;
};

/* Protocol functions */
int azeron_protocol_init(struct azeron_device *device);
int azeron_protocol_read_config(struct azeron_device *device, uint32_t offset, uint8_t *data, size_t *size);
int azeron_protocol_write_config(struct azeron_device *device, const uint8_t *data, size_t size);
int azeron_protocol_get_button_mapping(struct azeron_device *device, uint8_t button_id, struct azeron_button_mapping *mapping);
int azeron_protocol_set_button_mapping(struct azeron_device *device, const struct azeron_button_mapping *mapping);
int azeron_protocol_get_stick_config(struct azeron_device *device, struct azeron_stick_config *config);
int azeron_protocol_set_stick_config(struct azeron_device *device, const struct azeron_stick_config *config);
int azeron_protocol_get_active_profile(struct azeron_device *device, uint8_t *profile_id);
int azeron_protocol_set_active_profile(struct azeron_device *device, uint8_t profile_id);
int azeron_protocol_get_profile(struct azeron_device *device, uint8_t profile_id, struct azeron_profile *profile);
int azeron_protocol_set_profile(struct azeron_device *device, const struct azeron_profile *profile);
int azeron_protocol_save_to_device(struct azeron_device *device, uint8_t profile_id);

/* Device functions */
int azeron_device_claim(struct azeron_device *device);
int azeron_device_release(struct azeron_device *device);
int azeron_device_read(struct azeron_device *device, uint8_t endpoint, uint8_t *data, size_t size, int timeout);
int azeron_device_write(struct azeron_device *device, uint8_t endpoint, const uint8_t *data, size_t size, int timeout);
int azeron_device_control_transfer(struct azeron_device *device, uint8_t request_type, uint8_t request, uint16_t value, uint16_t index, uint8_t *data, size_t size, int timeout);

/* Utility functions */
const char *azeron_usb_error_string(int error);
int azeron_libusb_to_azeron_error(int libusb_error);
void azeron_device_info_from_libusb(struct azeron_device *device, libusb_device *libusb_dev);

#endif /* AZERON_INTERNAL_H */